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Results 1651 to 1680 of 4875:

Applications of polycaprolactone in the food industry: A reviewReview

Julio Enrique Oney-Montalvo, Dany Alejandro Dzib-Cauich, Emmanuel de Jesús Ramírez-Rivera, Adan Cabal-Prieto, Luis Alfonso Can-Herrera

Czech J. Food Sci., 2024, 42(2):77-84 | DOI: 10.17221/200/2023-CJFS

The food industry is always looking for ways to innovate in elaborating and packaging food products to ensure the consumer receives the highest quality. The new proposals include the use of polycaprolactone (PCL), a commonly used biopolymer that is soluble in many organic solvents. The PCL features can be modified by forming blends with other polymers and bioactive molecules to expand their applications in the food industry. For instance, there have been developments in packages and active substances that incorporate microcapsules based on PCL. This review explores the applications of PCL in the food industry, encompassing its role as a biodegradable active package and as an encapsulating agent. The review underscores the potential of this polymer in the context of the food industry.

Co-application of biochar and melatonin enhances pea (Pisum sativum L.) performance and alleviates cadmium contamination stressOriginal Paper

Yanfang Wang, Jinzhao Liu, Dong Li, Zhengyang Yan, Ling Liu

Plant Soil Environ., 2024, 70(4):195-202 | DOI: 10.17221/462/2023-PSE

Sole biochar addition or exogenous melatonin application can decrease cadmium (Cd) toxicity in polluted soils and improve plant performance and growth. Yet the additive effects of biochar and melatonin application on plant growth, oxidative stress modulation and Cd absorption remain unclear. We conducted a pot experiment to study the combined effects of melatonin, biochar and Cd stress on pea (Pisum sativum L.) seedling growth, antioxidant enzyme activities, photosynthesis parameters and Cd uptake. Results showed that Cd addition significantly decreased pea growth, chlorophyll content, net photosynthesis rate (Pn), transpiration rate (Tr), stomatal conductance (gs), and increased intercellular CO2 concentration (ci) and oxidant enzyme activities when compared to non-Cd contaminated treatment. Exogenous applications of the biochar or melatonin alone significantly decreased the harmful effects of Cd stress and promoted pea seedling growth. Moreover, soil remediation with biochar could more effectively improve pea growth, chlorophyll contents, and photosynthesis parameters and contribute to Cd immobilisation; the melatonin treatment alone could more effectively increase antioxidant enzyme activities. The treatments of biochar and melatonin showed an additive result and had the largest promoting in pea growth, antioxidant enzyme activities, and lowest Cd contents in pea tissue and soil. These results indicate that the combined use of melatonin and biochar is more effective at reducing Cd uptake by pea tissues and alleviating Cd harm to pea plants.

Effects of combined application of animal slurry and mineral fertiliser on rice yield and soil nitrogen cycle microbesOriginal Paper

Pengcheng Wang, Siyuan Jin, Henglin Xiao, Zhi Zhang, Cheng Hu, Yan Qiao, Donghai Liu, Xifa Guo, Xiangrong Peng

Plant Soil Environ., 2024, 70(4):220-228 | DOI: 10.17221/315/2023-PSE

This paper studied the response of rice yield and soil nitrogen (N) cycling microorganisms to the combined application of animal slurry and mineral fertiliser. A pot experiment was conducted on typical yellow-brown paddy soil. There were five treatments: (1) CK – no N fertilisation; (2) S0 – mineral fertilisation; (3) S30 – 30% slurry with 70% mineral fertilisation; (4) S60 – 60% slurry with 40% mineral fertilisation; and (5) S100 – slurry application. Rice yield, yield components, and soil properties were investigated at harvest. The abundance of soil N cycle functional genes abundance was quantified via quantitative real-time PCR. The rice yield reached a high level when the proportion of slurry used to replace mineral fertiliser was 30–50%. The yield in response to mineral fertiliser (S0) was equivalent to that in response to no N fertilisation since the formation of effective panicles was inhibited. With the slurry replacement ratio increase, the available phosphorus and potassium contents in the soil improved, but the nitrate content decreased. Considering the entire soil N cycle, nitrogen-fixing microbes (nifH), ammonia-oxidising archaea (AOA amoA) and nitrite-reducing microbes (nirS and nirK) had greater abundances, reaching 108 copies. Compared with those in the S0 treatment, the abundances of most N cycle functional genes in the S30 treatment, except for napA, significantly increased from 31.2% to 100.9%, and the increase in the abundance of nirS and nosZ in the S100 treatment reached 4 times, which was obviously greater than that of the other genes. Correlation analysis revealed that high soil pH promoted N fixation and nitrification, while NH4+-N had the opposite effect on N fixation and nitrification, and available phosphorus and potassium actively influenced denitrification. These results showed that a 30–50% slurry application ratio was recommended for rice, which was beneficial for maintaining high yields and high abundances of soil N cycle functional genes.

Comparison of two soil quality assessment models under different land uses and topographical units on the southwest slope of Mount MerapiOriginal Paper

Retno Meitasari, Eko Hanudin*, Benito Heru Purwanto

Soil & Water Res., 2024, 19(2):77-89 | DOI: 10.17221/76/2023-SWR


This study aims to compare the soil quality indexing model by adding and weighting the soil under different land uses and slope positions on the southwest slope of Mount Merapi, Indonesia. Soil sampling was carried out based on a landscape analysis divided into four geomorphological units (slopes): upper, middle, lower and foot slopes. The research design was nested where the soil sample was located (surface soil 0–30 cm). Based on the research results, soil quality indices (SQI) of forest on the upper slopes is very high. SQI of dry fields on the middle, lower and foot slopes is low to medium. SQI of mixed gardens on the middle and lower slopes is low to medium. SQI of snake fruit land on the middle, lower and foot slopes is medium to high. SQI of grassland on the lower slopes is medium to high, and SQI of paddy fields on the foot slopes is medium to high. Weighted soil quality index (SQIw) has a higher correlation (R2 = 0.90) and can predict soil quality better than the adding soil quality index (SQIa) model (R2 = 0.76). Indicators that most influence soil quality are the percentage of sand, total N, C-POM, C-Min, pH, and aggregate stability, that indicators are entirely influenced by organic matter, site-specific management to maintain SQI by maintaining organic matter. The selected indicators in this study can be used to determine the SQI in similar areas.

Effect of seed invigoration by osmo-conditioning on radicle emergence and physiological parameters of the true seed of shallot (Allium ascalonicum L.)Original Paper

Blair Moses Kamanga, Eny Widajati, Satriyas Ilyas, Endah R. Palupi

Hort. Sci. (Prague), 2024, 51(1):39-50 | DOI: 10.17221/150/2022-HORTSCI

Seed deterioration resulting from production and storage factors is the major cause of differences in the seed vigour that results in low seedling emergence in both the laboratory and in the field. An experiment was conducted to evaluate the effect of seed invigoration by osmo-conditioning on the radicle emergence and the physiological parameters of naturally deteriorated seed lots of the true seed of shallots. The experiments were arranged in a completely randomised design with a repeated measurement for radicle emergence and a randomised complete block design for seedling vigour in the field with four replicates. The results indicated that the radicle emergence of the invigorated seed with ZnSO4 correlated well with the seed viability and vigour parameters for seed lots stored under uncontrolled conditions. The radicle emergence of invigorated seeds stored under the uncontrolled condition were more predictive and strongly correlated with the seedling vigour parameters in the field, i.e., the field emergence, field emergence rate and mean emergence time with r = 0.968, r = 0.970 and r = –0.947, respectively. Furthermore, the coefficients of determination were significant (P < 0.05) with R2 = 0.936 field emergence, R2 = 0.941 field emergence rate and R2 = 0.898 for the mean emergence time. Seed invigoration with 0.5% ZnSO4 further significantly reduced the time of a single count of RE from 72 hours and 68 hours to 60 hours with field prediction rates ranging from 90–99%. It was concluded that the radicle emergence of TSS can be improved by invigorating the seeds with 0.5% ZnSO4 thereby increasing the germination percentage, vigour index, and germination rate and reducing the mean germination time.

Metabolite changes in cucumber xylem sap under rhizosphere aerationOriginal Paper

Hongbo Chen, Xu Zhao

Hort. Sci. (Prague), 2024, 51(1):51-58 | DOI: 10.17221/156/2022-HORTSCI

The impact of rhizosphere aeration on the composition of xylem sap in cucumber grown in soil was studied to determine its effects on (i) water and nutrient uptake, (ii) xylem transport, and (iii) amino acid synthesis in the roots. Plants grown under three different aeration conditions were subjected to progressive gas stress throughout the whole growth period. The shoot and root growth, xylem nitrate (NO3) concentration, potassium (K+) concentration, xylem sap flow rate, and amino acid concentrations were higher in the Z1 treatment plants than in the control (CK) plants, and the former also showed a lower CO2 (0.25–0.84%) and a higher O2 (18.22–20.02%). However, the Z3 treatment plants exhibited decreased xylem loading of amino acids, NO3 concentrations, and K+ concentrations and a lower flow rate of xylem sap, which restricted shoot and root growth due to poor aeration caused by a higher CO2 (0.75–3.68%) and a lower O2 (11.51–18.6%). Furthermore, the xylem pH in these plants was lower by approximately 0.17 units, and the conductivity was decreased by approximately 0.31 mS/cm. Based on the observed results, the CO2 and O2 in the soil can potentially regulate root and shoot growth and the xylem sap composition in cucumber. Therefore, rhizosphere aeration is important for the vigorous growth of plants.

Improving photosynthesis and the ascorbate-glutathione cycle of own-root and grafted-root chrysanthemums by brassinolide under drought stressOriginal Paper

Peng Ming Yang, Rui Jiao Yang, Song Tao He

Hort. Sci. (Prague), 2024, 51(1):59-67 | DOI: 10.17221/177/2022-HORTSCI

Many studies have demonstrated that brassinolide improves the drought tolerance of plants. This study aims to test whether the drought tolerance of chrysanthemums can be improved by brassinolide and to clarify the underlying physiological mechanism. An own-root chrysanthemum and a corresponding grafted-root line (Artemisia annua rootstock) were treated with brassinolide under three water levels in a randomised complete block design with five replications. The results showed that brassinolide increased the relative water content, net photosynthetic rate, chlorophyll (Chl) fluorescence parameters, Rubisco, ascorbate peroxidase, glutathione reductase, dehydroascorbate reductase and monodehydroascorbate reductase activities, ascorbate/dehydroascorbate, glutathione/oxidised glutathione and dry mass, and reduced the H2O2 content in the own-root and grafted-root chrysanthemums, especially under drought stresses. The magnitude of the changes to the parameters was greater in the own-root line than in the corresponding grafted-root line under brassinolide treatment. The above parameters showed significant differences (P < 0.05) between the brassinolide chrysanthemums and the corresponding non-brassinolide chrysanthemums under drought stresses. This might be the physiological mechanism of improved drought tolerance by brassinolide in chrysanthemums.

Enhancing rice yield, quality, and resource utilisation with slow-release fertiliser in alternate wetting and drying irrigationOriginal Paper

Keji Hua, Peng Yang, Jieyu Zhou, Wei Liao, Jun He, Junlin Zheng, Chi Tang, Yuqin Li, Baolong Zhang

Plant Soil Environ., 2024, 70(5):253-262 | DOI: 10.17221/450/2023-PSE

Partial slow-release fertiliser substitution for urea combined with water-saving irrigation may synergistically improve rice yield, quality, water, and nitrogen (N) utilisation. A field experiment to evaluate different combinations of irrigation regimes: alternate wetting and drying irrigation (AWD) and flooding irrigation (FI), and N strategies: N0 (no N fertiliser); N1 (100% conventional fertiliser); N2 (100% SCF – sulphur-coated fertiliser); N3 (70% SCF + 30% urea), and N4 (50% SCF + 50% urea) on efficient rice production. Results indicated that higher substitution rates of SCF (N2 and N3) increased total N and ammonia N in surface water, leachate, and soil while reducing nitrate N relative to N1. The N3 strategy showed the highest yields, dry matter, total N uptake, and water N utilisation due to a nutrient release pattern that matched rice growth requirements. AWD yielded 5% lower than FI, except for the N3 strategy, but protein content increased by 12%, and amylose content dropped by 17%. The structural equation model analysis suggested that SCF positively impacted yield by influencing surface water total N and soil total N. Our findings indicate that implementing AWD alongside a 70% SCF basal fertiliser and 30% urea topdressing can optimise rice yield and quality while effectively managing water and fertiliser resources in the middle-lower Yangtze River Basin.

The effect of various factors (light, temperature, salt, and drought) on germination of Bromus sterilis L.Original Paper

Kateøina Hamouzová, Jaromír ©uk, Soham Bhattacharya, Jakub Mikulka, Veronika Valièková, Michaela Koláøová, Josef Soukup

Plant Soil Environ., 2024, 70(5):287-295 | DOI: 10.17221/21/2024-PSE

Bromus sterilis L. (barren brome) is one of the most economically important noxious grass weeds in the winter cereal fields of Europe. Its ecological behaviour in this agro-climatic region should be assessed for effective weed control strategies. The present study was conducted to assess the dormancy and germination response of the B. sterilis population from the Czech Republic under thermal, light, and stress conditions. The dormancy loss experiment revealed that seeds exposed to the light regime showed a remarkably lower percentage of germination, and under alternating temperatures of 10/20 °C in dark conditions, rapid loss of primary dormancy was observed. This population was found to germinate across a wide temperature range of 5–35 °C, with the highest germination rate at 25 °C (T50 = 1.14 days in dark, 1.21 days in light) and the germination time increased with decreasing temperatures below 25 °C. Further, due to fitness advantage, herbicide-resistant (R) biotypes were found to be more stress-tolerant than susceptible (S) biotypes under salinity and drought conditions. In the highest stress conditions, the germination of S biotypes was negligible, while R biotypes can germinate under high stress, but germination decreased below 25 °C. The current findings may add value to effective weed control strategies using prediction models based on seed dormancy and germination values under different hydrothermal conditions.

Effect of seed weight and biostimulant seed treatment on establishment, growth and yield parameters of winter oilseed rapeOriginal Paper

David Beèka, Lucie Beèková, Matìj Satranský, Kateøina Pazderù

Plant Soil Environ., 2024, 70(5):296-304 | DOI: 10.17221/98/2024-PSE

This study evaluated the effect of seed weight and seed treatment on yield and growth parameters in a three-year field trial. Seed weight treatments were tested in three levels of thousand seed weight (TSW): low 4.28 g, medium 5.00 g and high 5.69 g, with and without a biostimulant seed treatment of Lumibio Kelta. Although statistically significant differences were not found in all experimental years, the three-year results showed that sowing seeds with higher seed weight increased the initial and final stand counts, root length, seed yield and oil content. The final stand at harvest time averaged over the three years ranged from 23.0 (low TSW) to 29.5 plants per 1 m2 (high TSW). Plants from high TSW seed had an average of 1.1 cm longer roots than plants from low TSW seed. The average yield increased with TSW: 5.49 t/ha (low TSW), 5.86 t/ha (medium TSW), and 5.94 t/ha (high TSW). High TSW also yielded higher oil content (45.77%) compared to the medium (45.25%) and low TSW (45.27%). No statistical difference could be detected in the initial emergence counts or final seed quality according to seed treatment. Seed treatment with the biostimulant increased root length and seed yield. Plants from seeds treated with the biostimulant had roots with an average of 0.6 cm longer, yielding 0.2 t/ha higher than the non-treated ones.

Effects of red-blue light spectrum on growth, yield, and photo-synthetic efficiency of lettuce in a uniformly illumination environmentOriginal Paper

Shipeng Luo, Jun Zou, Mingming Shi, Senmao Lin, Dawei Wang, Wenbin Liu, Yan Shen, Xiaotao Ding, Yuping Jiang

Plant Soil Environ., 2024, 70(5):305-316 | DOI: 10.17221/480/2023-PSE

This study comprehensively investigates the impact of varying red-to-blue light ratios on the growth of Spanish lettuce. The research considers various factors such as growth morphology, photosynthetic parameters, and chlorophyll fluorescence. Lettuce was cultivated in an environment with a photosynthetic photon flux density (PPFD) of 200 ± 20 μmol/m2/s and a photoperiod of 16 h per day. The experiment incorporated eight distinct light treatment methodologies, with the red-to-blue light ratios ranging from 2 : 8 (R2B8) to 9 : 1 (R9B1). The data implies that during the initial 20 days of growth, groups exposed to a higher proportion of red light demonstrated superior growth. In particular, the R9B1 group exhibited the highest increase in plant height. The photosynthetic performance of leaves (net photosynthetic rate, stomatal conductance, and transpiration rate) showed a tendency to rise with a decreasing red-to-blue ratio within a particular range, peaking at R3B7. However, both the dry matter content and fresh weight were relatively lower under the R3B7 light quality ratio. The results indicate that cultivating lettuce under the R8B2 ratio led to optimal outcomes. This group significantly outperformed the other test groups in terms of weight and exhibited higher photosynthetic rates. Despite exhibiting lower stomatal conductance, this group reduced energy consumption and ultimately achieved the highest overall weight.

Evaluation of protein quality of wheat-rye flour blends by use of two small-scale analytical methodsOriginal Paper

Ivan ©vec, Petra Smrèková

Czech J. Food Sci., 2024, 42(2):118-126 | DOI: 10.17221/187/2023-CJFS


The technological quality of the protein fraction of wheat white flour (WW) was determined by the lactic acid Solvent Retention Capacity and by the Gluten Performance Index (LA-SRC and GPI; AACC method 56-11.01). Parallelly, Perten's standard Gluten Index test (GI; AACC method 38-12.02) was performed with that wheat control. Consequently, the same methods were applied to 9 bi-composite blends mixed at ratios of 90 : 10, 80 : 20, 70 : 30, 60 : 40, 50 : 50, …, and 10 : 90 as WW replacement with one of the rye bread flours (RB), and the RB control itself. Unlike successful measurements in the case of the LA-SRC and GPI, washing gluten from the first 90 WW : 10 RB blend led to the clogging of the Glutomatic sieve, likely due to the interaction of wheat gluten with rye arabinoxylans. The discrepancy induced the development of a modification of the standard GI procedure; clogging was avoided by precipitating flour and centrifuging the swollen solid from suspension, similarly like in the SRC method. The settled residue transported to a standard sieve cassette was secondly centrifuged in the original apparatus Perten CF2015. The weighing of the overflow and underflow of the sieve and the calculation of the results were performed according to the original GI method. For the WW control, the standard GI value was 90% and the modified Gluten Index value (GImodif) was 82%. As expected for WW-RB counterparts, the higher the portion of rye in the bi-composite blend, the lower the value of the GImodif. For the 50 WW : 50 RB blend and the RB itself, the GImodif values were 47% and 18% (the GPI values 0.66, 0.45, and 0.39, respectively). On the contrary, the LA-SRC demonstrated a convex course (118, 104, and 123%, respectively). In the plane of the principal components (PC), namely PC1 and PC2, the variables related to gluten quality formed 4 groups as a function of the stepwise change in the mixing ratio of WW and RB: i) flour protein content, GPI, and GImodif; iiLA-SRC; iii) dietary fibre content and ash content; iv) water, sucrose, and sodium carbohydrate SRCs. However, the modified test procedure should be revised in wheat varieties characterised by a wider spectrum of protein quality, mixed with different types of rye flour (especially wholegrain one).

Unravelling the bidirectional impact of Chinese agricultural subsidy policy on agricultural efficiency and farmers‘ income through panel data analysisOriginal Paper

Yungang Tang, Haojie Liao, Ye Wu, Gang Lei

Agric. Econ. - Czech, 2024, 70(4):165-177 | DOI: 10.17221/335/2023-AGRICECON


This study examined the bidirectional impact of Chinese agricultural subsidy policies on agricultural efficiency and farmers’ income. It employed panel data from 2004 to 2020 across 31 Chinese provinces, and the three-stage least squares method was used for simultaneous estimation. Different regions and farmer types were analysed separately. The findings revealed a significant bidirectional impact of the agricultural subsidy policy on agricultural efficiency and farmers’ income, signifying a strong positive feedback loop. Varied types and levels of subsidy policies differently impacted regions and farmer categories, showcasing diverse outcomes and adaptive responses to subsidy policies. The ratio of total subsidy to GDP (SUBGDP) positively impacted production efficiency and per capita disposable income. This result suggests that the subsidy policy helped enhance agricultural production efficiency and increased farmers’ income levels. Conversely, the ratio of various subsidies to the total subsidy manifested different directions and degrees of impact on production efficiency and per capita disposable income, suggesting areas where the subsidy policy framework can be optimised. In addition to presenting a theoretical discussion on agricultural subsidy policies, this study provides theoretical insights and policy recommendations for the formulation and implementation of an optimal agricultural subsidy policy.

Corporate social responsibility and the relationship to stakeholders in large agricultural holdings in the Czech RepublicOriginal Paper

Marie ©impachová Pechrová, Ondøej ©impach

Agric. Econ. - Czech, 2024, 70(4):155-164 | DOI: 10.17221/369/2023-AGRICECON


Corporate social responsibility (CSR) is also implemented in agriculture, where larger agricultural holdings have a higher influence. We focused on them and situated our study to a country with a large average farm acreage – the Czech Republic. The aim of the paper is to assess to what extent large agricultural holdings perceive socially responsible behaviour as being important and how it is manifested in their relationship to the stakeholders and the behaviour in economic, social and environmental areas using Carroll’s pyramid and concept of 3 ‘P’. It is also examined if the higher perception of CSR influences the assets. Firms were grouped according to the perceived CSR by a cluster analysis. The highest economic responsibility in cluster 1 corresponded to the relatively high value of the assets, but the highest was in cluster 2 and 3 with important legal and ethical responsibilities. Cluster 4 had the lowest CSR, the same as the value of the assets, but further investigation is needed. The most important stakeholders were the owners and employees, but also the range of activities was provided for the locals. CSR and the importance of the stakeholders in large Czech agricultural holdings were highly perceived, especially on an economic level and in the social area.

Impact of production outsourcing on the adoption of low-carbon agricultural technologies in ChinaOriginal Paper

Ruirui Du, Aftab Khan, Rui Shi, Yujie Shen, Minjuan Zhao

Agric. Econ. - Czech, 2024, 70(4):187-197 | DOI: 10.17221/385/2023-AGRICECON


Adopting low-carbon agricultural technologies (LCATs) is fundamental to reducing carbon emissions in agriculture. Our study explores the factors influencing the adoption of LCATs and the roles of production outsourcing and specialised farming within the framework of off-farm employment. In this regard, survey data were collected from 1 040 farmers in the Yellow River region of China in 2020 to examine the effect of production outsourcing on the farmers’ adoption of LCATs. Potential mechanisms associated with specialised farming and off-farm employment are considered to comprehend this relationship. We also investigate the heterogeneous effects of production outsourcing on adopting LCATs, taking different education levels and arable land areas into account. The results show a positive association between production outsourcing and farmers’ LCATs adoption behaviour, even after considering self-selection bias. Specifically, outsourcing production can significantly increase the likelihood of farmers adopting low-carbon tillage, low-carbon irrigation, and low-carbon fertilisation technologies by 7.2%, 8.1%, and 7.3%, respectively. This effect is more pronounced among farmers with higher levels of education and smaller areas of arable land. Furthermore, production outsourcing increases the LCATs adoption by promoting specialised farming. The findings suggest that outsourcing is vital to alleviating the lack of LCATs adoption resulting from off-farm employment.

Digital image processing for preliminary detection of infected porang (Amorphophallus muelleri) seedlingsOriginal Paper

Aryanis Mutia Zahra, Noveria Anggi Nurrahmah, Sri Rahayoe, Rudiati Evi Masithoh, Muhammad Fahri Reza Pahlawan, Laila Rahmawati

Res. Agr. Eng., 2024, 70(2):111-121 | DOI: 10.17221/79/2023-RAE

Porang (Amorphophallus muelleri) is  an Indonesian parental plant tuber developed vegetatively from bulbils during dormancy and harvested through petiole detachment for the industrial production of glucomannan. Pathogenic fungi and whiteflies can cause infection during harvesting and storage, destructing plant cells as well as reducing seed quality and crop yields. Therefore, this study aimed to develop a calibration model for detecting infected and non-infected porang bulbils using a computer vision system. Image parameters such as colour (red, green, blue – RGB and hue, saturation, intensity – HSI), texture (contrast, homogeneity, correlation, energy, and entropy), and dimensions (width, area, and height) were evaluated on 90 samples in three positions. The results showed that the majority of image quality properties were significantly associated with non–infected and infected porang bulbils as showed by Pearson correlation values of 0.901 and 0.943, respectively. Discriminant analysis based on image attributes effectively classified non-infected and infected seedlings, achieving a model accuracy of 97.0% for correctly classified cross-validated grouped cases. Therefore, computer vision can be used for the preliminary detection of fungal infection in porang bulbils, as evidenced by its high accuracy and outstanding model performance.

Influence of daily feed ration on growth and condition of juvenile pikeperch (Sander lucioperca) reared in a recirculating aquaculture system (RAS)Original Paper

Tomá¹ Pìnka, Oleksandr Malinovskyi, Jitka Koláøová, Václav Kuèera, Tomá¹ Policar

Czech J. Anim. Sci., 2024, 69(6):230-242 | DOI: 10.17221/33/2024-CJAS


The study tested the effect of daily feed ration (DFR: 0.5%, 0.75%, 1.0%, 1.25%, and 1.5% of fish biomass) on juvenile pikeperch (Sander lucioperca) with an initial body weight of 21.5 ± 5.1 g and total length of 144.5 ± 8.5 mm. The pikeperch were fed floating feed at 8-hour intervals for a duration of 84 days. By the end of the experiment, the group fed DFR of 1.5% exhibited the highest body weight (51.5 ± 16.1 g) and total length (188.2 ± 17.8 mm). The weight heterogeneity, measured as the coefficient of variation (CV), ranged between 30.29 and 33.24%. The specific heterogeneity rate (SHR) ranged from 304.44 to 334.94‰/day. The group with DFR of 1.0% exhibited the highest degree of heterogeneity. Minor fin erosion was observed in the caudal fin by the end of the experiment. No significant differences were revealed in selected biochemical parameters indicating the liver, spleen, and intestinal function. All the fish tested were adequately fed, being provided sufficient nutrients for the proper growth of pikeperch. The DFR of 1.5% was evaluated as the most favourable. This amount of feed supported a higher number of values for Fulton’s coefficient (FC), specific growth rate (SGR), thermal growth rate (TGR), fish weight heterogeneity, growth of total fish biomass (BG), and optimum level of biochemical parameters in blood plasma.

Ferric oxide nano-priming enhances photosynthetic and physicochemical properties of sunflower (Helianthus annuus L.) microgreensOriginal Paper

Aayushi Gupta, Rohit Bharati, Jan Kubes, Pavla Vachova, Daniela Popelkova, Lovely Mahawar, Marek Zivcak, Xinghong Yang, Marian Brestic (ORCID: 0000-0003-34

Plant Soil Environ., 2024, 70(11):702-711 | DOI: 10.17221/272/2024-PSE

In modern agriculture, nano-priming represents an innovative approach, harnessing the power of nanotechnology to enhance crop yields and nutrition. However, to effectively harness the potential of nanoparticles (NPs) for agriculture applications, understanding their mode of action and optimal application rates for positive effects on microgreen growth and physiology is critical. In this interdisciplinary study, we investigated the priming of sunflower seeds with a range of concentrations (25, 50, and 100 mg/L) of ferric oxide (Fe2O3) nanoparticles (FeNPs) and compared them with control samples. Our findings revealed a significant increase in plant biomass, leaf size, and photosynthetic activity in treated samples. The activities of photosystems I and II increased with higher FeNPs concentration. The treated samples exhibited elevated levels of total phenolics, anthocyanin, and antioxidant enzyme activity, along with increased macronutrients and micronutrients. These findings highlight the potential of FeNPs as a promising tool for enhancing plant growth and physiology in sunflower microgreens.

Information sources in agricultureOriginal Paper

Jan Jarolímek, Jakub Samek, Pavel ©imek, Michal Stoèes, Jiøí Vanìk, Jan Pavlík

Plant Soil Environ., 2024, 70(11):712-718 | DOI: 10.17221/361/2024-PSE

The aim of this study is to define data sources and propose methods for effective and secure data management in an agricultural enterprise in the context of using data for decision support. Current developments in information and communication technology (ICT) have contributed towards the increase in the amount of generated data in various fields. The main data sources for agricultural enterprises are the farm itself, suppliers, government, market, and research. The use of smart solutions, artificial intelligence, and other innovative practices in agriculture is discussed at many conferences, in various journals, strategies and project plans. Data is the essential raw material for all these solutions. Large amounts of data cannot be analysed efficiently with spreadsheet programs. Currently, there are trends in the use of data, for example, in business intelligence (decision-making systems), e.g. tools using online transaction processing (OLAP) or process automation or the possibility of e.g. tracing the origin of food. The availability and possibility of creating large data sets bring many challenges related to managing that data. To effectively manage farm data, it is essential to have a well-developed data management plan (DMP) used to formalise the processes related to handling. A DMP mainly addresses archiving, backup, licensing and other important aspects of data management. The challenges and developments in farm data management include incorporating artificial intelligence into data analysis and security. Food is classified as an "Entity of Critical Importance" in the NIS2 EU Directive, which also deals with cybersecurity issues.

Target price policy and rural household income: Evidence from ChinaOriginal Paper

Genjin Sun, Yanxiu Liu, Yurong Zhu

Agric. Econ. - Czech, 2024, 70(5):226-243

Agricultural subsidy policy can improve the planting enthusiasm of rural households by increasing their income. It is of great significance to assess and summarise the effect of the soybean and cotton target price subsidy policy and to determine future policy direction. Using the national rural fixed-observation point socioeconomic survey data from 2009 to 2017, the study employed the difference-in-differences (DID) method to evaluate the impact of the target price policy (TPP) on rural household income in China. TPP had no significant impact on the total income of rural households. Specifically, TPP increased the farm income of rural households but simultaneously reduced the wage income and had no significant impact on the other income. Moreover, the impact of TPP on rural household income varied with the planting scale and income level; the effect of TPP was strong among the non-poor or scale operation rural households. TPP implementation affected rural household farm and wage income by affecting farmers’ allocation of working time and cost input. Therefore, implementing TPP should consider farmers’ participation in non-farm employment, further adjust the subsidy intensity and scope, and combine direct subsidies with the poverty reduction effect in poor areas. The contribution of this article is to explore the implementation effect of target price subsidy policies from the perspective of farmers’ income, to deconstruct farmers’ income, and explore the mechanism of policy action. This paper provides a theoretical basis and policy inspiration for China to improve and adjust the agricultural subsidy policy, mobilise farmers’ enthusiasm to cultivate, and ensure national food security.

Limosilactobacillus reuteri L26 BiocenolTM and its exopolysaccharide: Their influence on rotavirus-induced immune molecules in enterocyte-like cellsOriginal Paper

P Schusterova, D Mudronová, K Loziakova Penazziova, V Hajducková, T Csank

Vet Med - Czech, 2024, 69(5):169-176 | DOI: 10.17221/106/2023-VETMED

This study aimed to evaluate the immunomodulatory effect of the probiotic Limosilactobacillus reuteri L26 BiocenolTM (L26) and its purified exopolysaccharide (EPS) with respect to antiviral innate immune response. In our experiment, we used porcine epithelial IPEC-J2 cells as a model of the intestinal barrier in a homologous infection by porcine Rotavirus A strain OSU6 (RVA). The production of selected molecules of non-specific humoral immunity was evaluated at the mRNA level. The EPS alone significantly increased the level of interferon λ3 (IFN-λ3) mRNA in the non-infected IPEC-J2 cells (P < 0.001). We also tested whether the treatment of IPEC-J2 cells by L26 or EPS influences the replication of RVA by virus titration and real-time PCR. We found that a pre-treatment in combination with subsequent continuous stimulation has no influence on the RVA replication. However, both treatments significantly decreased the RVA-induced production of IFN-λ3 (P < 0.05) and the “SOS” cytokine interleukin 6 (IL-6; P < 0.01), already at the transcription level. In addition, the EPS treatment resulted in significantly increased IL-10 mRNA in the RVA-infected cells. In summary, we assume an immunoregulatory potential of L. reuteri L26 BiocenolTM and its EPS in the local intestinal antiviral immune response.

Comparative analysis of unmanned aerial vehicle and conventional spray systems for the maize fall armyworm Spodoptera frugiperda (J.E. Smith) (Lepidoptera; Noctuidae) managementOriginal Paper

P.S. Shanmugam, T. Srinivasan, V. Baskaran, A. Suganthi, B.Vinothkumar, G. Arulkumar, S. Backiyaraj, S. Chinnadurai, V. Somasundaram, N. Sathiah, N. Muthukrishnan, S.V. Krishnamoorthy, K. Prabakar, S. Douresamy (email: douressamy.s@tnau.ac.i

Plant Protect. Sci., 2024, 60(2):181-192 | DOI: 10.17221/96/2023-PPS

Insecticidal interventions at critical stages of maize are an important strategy for managing invasive insect pest fall armyworm (FAW) Spodoptera frugiperda (J.E. Smith). Conventional spraying systems cannot be used over larger areas, and the insecticide application using unmanned aerial vehicles is becoming popular among peasants. As the FAW resides inside the maize whorls, targeted insecticide application is necessary for effective management. The efficacy of (UAV) spray with different types of nozzles was compared with the conventional spray system, namely high-volume spray and Control droplet applicator. The other spray systems' droplet density, efficacy, and residues of insecticides in plants, soil and water were studied. The UAV droplet density up to 5 m swath recorded no significant variation for both nozzles. A UAV with an atomizer nozzle was as effective as a high-volume spray in reducing the FAW infestation. The residue analysis of leaf samples from the study area revealed more residues in the control droplet applicator and UAV atomizer nozzle. The per cent reduction of initial deposits in the top, middle and bottom maize leaves was least in the UAV atomizer nozzle. The insecticide residues in the study sample area were also below the detectable limit. UAV usage in maize saves time and reduces FAW damage as that of high-volume sprayers.

Aceria artemisiifoliae Vidoviæ & Petanoviæ (Acari: Eriophyoidea) on common ragweed – the second record in the worldShort Communication

Peter Tóth, Monika Tóthová, Nikola Andjelkoviæ, Slavica Marinkoviæ, Tatjana Cvrkoviæ, Biljana Vidoviæ

Plant Protect. Sci., 2024, 60(2):207-211 | DOI: 10.17221/13/2024-PPS

Common ragweed – Ambrosia artemisiifolia L. (Asteraceae) is an invasive plant species in Europe native to North America. Most of the records of known eriophyid mites on different ragweed species are from their native range. Our field experiments in Slovakia, 2016–2023, aimed to identify specific species feeding on common ragweed. We searched for symptomatic plants and collected growing tips, which were then preserved in 70% ethanol for further study. A recently described species of eriophyid mite, Aceria artemisiifoliae Vidoviæ & Petanoviæ (Acari: Eriophyoidea), was found in western and eastern Slovakia. This is the first record of the species in Slovakia and the second record in the world. It remains unclear whether this species is invasive like Ambrosia, and whether it could be used as a potential biological control agent.

Partitioned nitrogen fertilisation in peanut rhizosphere and geocarposphere drives specific variation soil microbiomesOriginal Paper

Haiyan Liang, Qi Wu, Liyu Yang, Dianxu Chen, Pu Shen

Plant Soil Environ., 2024, 70(6):342-355 | DOI: 10.17221/498/2023-PSE

Peanut is a plant characterised by belowground fruiting that absorbs nutrients not only through its roots but also through its pods. However, little is currently known regarding the species of bacteria that contribute to nutrient absorption and utilisation in this plant’s pod and root zones. This study examined the effects of root and pod area nitrogen (N) fertiliser application on peanut rhizosphere and geocarposphere microbial communities and functions. Using two peanut cultivars [nodulated Huayu 22 (H) and non-nodulated NN-1 (B)], we applied the following four treatments: no N fertiliser (HT1, BH1); N applied to geocarposphere soil (HT2, BT2); N applied to rhizosphere soil (HT3, BT3), and N applied to both rhizosphere and geocarposphere soil (HT4, BT4). The results revealed that compared with HT1 and BT1, the HT3, HT4, BT3, and BT4 treatments promoted increases in total plant accumulated N of 11.2, 30.1, 38.5, and 9.9%, respectively. Moreover, N input contributed to an increase in the abundance of bacteria colonising the surrounding pods, which differed significantly from bacteria colonising the rhizosphere. Among the top four bacterial phyla detected, we recorded a significant increase in the relative abundances of Proteobacteria and Gemmatimonadetes in response to treatments HT2 and HT4, whereas the highest relative abundances of Acidobacteria and Actinobacteria were detected in HT3 plants. Regarding cultivar B, we detected increases in the relative abundances of Bacteroidetes and Gemmatimonadetes in response to the BT2 and BT4 treatments, and in the relative abundance of Actinobacteria in BT3 treated soil. The findings of FAPROTAX functional analysis revealed clear differences among the T2, T4, and T3 treatments of two peanut cultivars concerning the functional groups with the highest relative abundances. These findings will make a considerable contribution to enhancing our understanding of the effects of N fertilisation on soil microbial structure and function in the rhizosphere and geocarposphere of peanuts and can provide a basis for identifying beneficial bacteria for promoting N utilisation and yield enhancement.

Physiological and metabolic responses of Lolium perenne L. roots to acid stress in cadmium-contaminated soilOriginal Paper

Xingrong Bai, Lili Chen, Zhaojie Wang, T. Ryan Lock

Plant Soil Environ., 2024, 70(6):366-376 | DOI: 10.17221/494/2023-PSE


Perennial ryegrass (Lolium perenne L.) has potential in the phytoremediation of cadmium (Cd)-contaminated soil due to its strong Cd accumulation capacity and high biomass. In this study, we investigated the growth physiology, Cd accumulation, and metabolites of L. perenne roots under different soil acid stress levels (pH 4.0, 4.5, 5.0 and 6.0) and Cd concentrations (100 and 0 mg/kg) after 90 days of growth. The results showed that soil acid stress significantly impacts the remediation capability and physiological metabolic properties of L. perenne. Based on root Cd content and enrichment coefficient, soil pH between 4.5 and 5.0 was more conducive to Cd accumulation. The growth physiology and Cd accumulation of L. perenne were inhibited under high soil acid stress (pH 4.0). High soil acid stress caused a decrease in root length, root volume, and root biomass of L. perenne. Root malondialdehyde (MDA) content and the activity of antioxidant enzymes (catalase (CAT) and peroxidase (POD)) increased significantly in response to high soil acid stress to enhance tolerance. Metabolomics analysis revealed that acid stress resulted in significant changes in certain metabolites. Tartaric acid, fructose and amino acids (glutamate and lysine) in the roots of L. perenne were compatible solutes under acid stress. This study indicated that L. perenne has strong physiological and metabolic tolerance, as well as Cd accumulation ability, in response to soil acid stress.

Green synthesis, characterisation, and antibacterial activity of silver nanoparticles obtained from Salvia officinalis extractOriginal Paper

Nural Karagözlü, Tuğçe Özeºer

Czech J. Food Sci., 2024, 42(3):163-173 | DOI: 10.17221/4/2024-CJFS


The present study investigated the properties and antimicrobial activity of silver nanoparticles synthesised through a green method using Salvia officinalis. Extracts were obtained from sage at two different temperatures, and these extracts were then used to synthesise silver nanoparticles through a reaction with AgNO₃. The characteristics of resulting silver nanoparticles and their antimicrobial effects on foodborne pathogenic bacteria were examined. During the synthesis, the colour of the silver nanoparticle solution changed from yellow to dark brown, and a significant absorbance peak was observed at 360 nm. The sizes of the synthesised silver nanoparticles were found to be 53.77 and 57.08 nm for the two different extraction temperatures, respectively. The nanoparticles exhibited spherical-rod shapes with silver contents of 83.91% and 84.38% and crystal sizes of 37.15 nm and 34.81 nm, corresponding to the two temperatures. The reduction of silver ions involved functional groups like C=C or C=O. The antimicrobial activity of the synthesised silver nanoparticles was evaluated at concentrations of 10 and 25 mg·mL–1 using the paper disc method against several foodborne pathogenic bacteria. Notably, the sage extract displayed antimicrobial efficacy against Salmonella Typhi, Listeria monocytogenes, and Staphylococcus aureus. However, no significant antimicrobial effect was observed against Escherichia coli O157:H7.

Accuracy and reliability of tibial torsion measurement using radiography and ultrasound in dogsOriginal Paper

M Jeong, K Kwack, J Kim, Y Yu, S Heo

Vet Med - Czech, 2024, 69(12):427-436 | DOI: 10.17221/50/2024-VETMED

Tibial torsion assessment is crucial for understanding deformities and malalignments that can lead to joint pathologies in dogs. Different methods such as radiography, computed tomography (CT), and three-dimensional (3D) volume-rendering techniques have been employed to measure tibial torsion. This study compared the accuracy and reliability of tibial torsion angle (TTa) measurements obtained using radiography and ultrasound tilting techniques against those obtained using the 3D volume-rendering method in small-to-medium-sized non-chondrodystrophic dogs. Seven dogs with 11 hind limbs were included in this study. Descriptive statistics revealed mean TTa values for radiography (1.6° ± 5.14°), ultrasound (2.92° ± 3.98°), CT (4.57° ± 3.44°), and 3D volume-rendering method (5.29° ± 3.30°). Intraclass correlation coefficient (ICC) analysis indicated excellent intra- and interobserver agreement between the radiography and ultrasound methods. Correlation analysis showed positive correlations between all the methods. These findings demonstrate that radiography and the ultrasound tilting technique are reliable alternatives for measuring TTa. Although slightly lower ICC values were observed than those of the 3D volume-rendering technique, the radiography and ultrasound methods still exhibited good to excellent reliability, suggesting that these alternative methods could be effective diagnostic tools for assessing TTa in clinical settings with high accuracy and reliability.

How does single- or double-cropped rice policy influence spatially irrigated land value in China?Original Paper

Yuqun Dong, Yaming Zhuang

Agric. Econ. - Czech, 2024, 70(6):279-290 | DOI: 10.17221/49/2024-AGRICECON


Rice cropped policy has been constantly changing, affecting the value of irrigated land. This study aims to examine distribution patterns of irrigated land value from a new perspective of uncertainties in single- and double-cropped rice policies in China. The real options approach was employed to calculate irrigated land value under policy uncertainty, and Moran’s index was applied to identify the spatial distribution characteristics of irrigated land value at the provincial level. The empirical results were as follows: significantly positive spatial correlations existed between the land value under two cropped rice policies. The northeast region of China had a low-value clustering effect based on geographical characteristics. In contrast, the southern provinces of China had a high-value clustering effect based on the criteria of administrative regions. This study considered policy uncertainty when evaluating the economic effect on irrigated land when revealing spatial correlation in land value. We provide a theoretical and empirical basis for the formulation of cropped rice policies.

Unlocking sustainable competitive performance in agro-based small and medium enterprises in South Asian Association for Regional Cooperation countriesOriginal Paper

Shamim Akhtar, Yi Cui, Stephanie Efua Frimpong, Nosheen Rafi

Agric. Econ. - Czech, 2024, 70(6):309-319 | DOI: 10.17221/264/2023-AGRICECON


Agro-based small and medium enterprises (SMEs) are currently receiving top priority among policymakers of the South Asian Association for Regional Cooperation (SAARC) nations  due to their great contribution to employment and GDP growth. This study examines the impact of financial literacy on the sustainable competitive performance of agro-based SMEs, with a focus on the mediating role of access to digital finance and the moderating role of business experience. Using Partial Least Squares Structural Equation Modelling (PLS-SEM), we analysed data from 345 SME owner-managers. The results indicate that financial literacy positively affects sustainable competitive performance, with access to digital finance serving as a significant mediator. However, business experience does not moderate the relationship between financial literacy and access to digital finance. These findings suggest that improving financial literacy and enhancing digital finance access are critical for the sustainable development of agro-based SMEs in the SAARC region.

Comparison of the blossom and shoot susceptibility of European and Asian pear cultivars to Pseudomonas syringae pv. syringaeOriginal Paper

Iveta Pánková, Václav Krejzar, Radka Krejzarová

Hort. Sci. (Prague), 2024, 51(2):85-97 | DOI: 10.17221/18/2023-HORTSCI

The susceptibility of 14 pear cultivars to the bacterium Pseudomonas syringae pv. syringae, the causal agent of bacterial blast, was evaluated using three different methods of in vivo inoculation detached shoots inoculation in a growth chamber, and terminal shoot and blossom inoculation of potted trees in a net house in the period 2020–2022. The 20-week assessment of infection symptoms in the net house showed different dynamics of disease development depending on the inoculation method, the weather during the growing season and the susceptibility of the pear cultivars. Most of the cultivars were during the study low susceptible to pathogen and were classified in blossom, terminal as well as detached shoot susceptibility class 2. The European cultivar Kiefer was the least susceptible (susceptibility class 1) to blossom infection, the Asian cultivars Chojuro and Ya Li to terminal shoot infection, and Ya Li to detached shoot infection. The European cultivar William’s was the most susceptible to all types of infection, being classified in class 3, moderately susceptible cultivars to infection of terminal shoots, and class 4, highly susceptible cultivars to infection of blossoms and detached shoots. The assessment of susceptibility of pear cultivars to Pseudomonas syringae pv. syringae in the net house approximated conditions as close as possible to the condition in orchards and should thus be consistent in plantings with similar environmental and weather conditions.

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