Fulltext search in archive



« advanced mode »

 previous    ...   30   31   32   33   34  35   36   37   38   39   ...    next 

Results 991 to 1020 of 2032:

Nutrient content in biomass of bilberry (Vaccinium myrtillus L.) in different habitats of protected areas of Inner Western CarpathiansOriginal Paper

Martin Kubov, Rastislav Janík, Jakub Tomes, Branislav Schieber

J. For. Sci., 2024, 70(4):161-175 | DOI: 10.17221/110/2023-JFS

The primary objective of this paper was to compare the nutrient content (N, Ca, S, K, P, Mg) of bilberry biomass, both aboveground and underground, growing in different habitats along the altitudinal gradient. The research was conducted in protected areas of the High Tatras National Park (Slovakia). Two different habitats subjected to study, namely spruce forest stands affected by disturbances (D – disturbed forest stands) and stands unaffected by disturbances (U – undisturbed forest stands), were located at different altitudes: 1 100 m a.s.l., 1 250 m a.s.l., and 1 400 m a.s.l. We found significant differences in the soil nutrient content along the altitudinal gradient. The highest content of nutrients was detected mostly at the highest altitudes in both habitats. The minimum reached 0.01 g·kg–1 (phosphorus), while the maximum was 8.33 g·kg–1 (nitrogen). In the case of the bilberry biomass, we found statistically non-significant differences in the content of nutrients among the altitudes within both habitats (D vs. U). The principal component analysis (PCA) showed that the aboveground biomass of bilberry had a significantly higher nutrient content compared to the underground biomass. Nutrient content in aboveground and underground biomass ranged from 1.00 g·kg–1 (phosphorus) to 13.49 g·kg–1 (nitrogen) and from 0.38 g·kg–1 (magnesium) to 7.55 g·kg–1 (nitrogen), respectively. The biological absorption coefficient (element content in dry biomass/element content in soil) reached the highest values mostly at the lowest altitude for both aboveground and underground biomass.

Transcriptome analysis of alfalfa (Medicago sativa L.) roots reveals overwintering changes in different varietiesOriginal Paper

Yajun Ma, Guozhu Yang, Ruijun Duan, Xiaoan Li, Siheng Zeng, Yajun Yan, Ce Zheng, Yueming Hu

Czech J. Genet. Plant Breed., 2024, 60(2):97-104 | DOI: 10.17221/92/2023-CJGPB

Low temperatures are one of the major abiotic stresses that affect alfalfa’s development and yield. Enhancing frost resistance through resistance-related genes is one of the most effective ways to address this issue in alfalfa. Therefore, exploring cold-resistant gene resources and the cultivation of cold-resistant alfalfa cultivars is inevitable in order to achieve high yield and quality. In this study, we conducted transcriptome profiling of roots obtained from two alfalfa genotypes, i.e., Qingda No.1 for freeze tolerance and Gannong No.9 for freeze sensitivity. We observed that Qingda No.1 had more lateral roots and a more developed root system after overwintering, while Gannong No.9 had fewer lateral roots and an underdeveloped root system. After overwintering, Qingda No.1 exhibited higher superoxide dismutase (SOD) activity compared to Gannong No.9, while Gannong No.9 showed higher perosuperoxide dismutasexidase (POD) activity than Qingda No.1. We identified 25,935 differentially expressed genes, with 12 979 and 12 956 differential genes found in the freeze-tolerant variety Qingda No.1 group and the freeze-sensitive Gannong No.9 group, respectively. The enrichment of the Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways also differed between the two groups. We also discovered several gene family members, and the most frequent transcription factors were bHLH, B3, NAC, WRKY, and MYB_related. These findings provide comprehensive information to further understand the molecular mechanisms of adaptation to freezing stress in alfalfa and offer potential functional candidate genes for adaptation to abiotic stress.

Repeated bolus injections of bupivacaine for continuous bilateral transversus thoracis plane block undergoing median sternotomy in a dog: A case reportCase Report

D Kim, D Shin, S Yun, G An, J Jung, WG Son

Vet Med - Czech, 2024, 69(4):123-129 | DOI: 10.17221/118/2023-VETMED

An 8-year-old, 6.5 kg, neutered female Shih-Tzu dog was presented for surgical resection of a mediastinal mass. A median sternotomy and left cranial lung lobectomy were performed. Intraoperatively, with the patient under general anaesthesia, a bilateral transversus thoracis plane (TTP) block was performed by injecting 0.5% bupivacaine (0.2 ml/kg) per side using real-time ultrasound guidance. After surgery, indwelling catheters for repeated bolus injections of bupivacaine in TTP were placed as follows: the fifth sternebra was palpated in dorsal recumbency, and the transducer was placed in the longitudinal plane lateral to the sternal border. A 16 gauge over-the-needle catheter was inserted caudo-cranially using an in-plane technique and located in the TTP. An intermittent bolus of bupivacaine (0.1 ml/kg) per side was injected via the indwelling catheter every 8 h for 3 days, with a constant rate infusion of an intravenous fentanyl (1 μg/kg/h) and ketamine (0.12 mg/kg/h) combination. Post-operative pain was evaluated using the Glasgow composite measure pain scale and the score was 4–5/24 on the day of surgery and gradually decreased over time. Additional rescue analgesia was not required. Repeated boluses of bupivacaine for a continuous bilateral TTP block may be a useful adjuvant for perioperative pain management strategies, including median sternotomy, in dogs.

Exploring the weed host range of resistance-breaking variants of tomato spotted wilt orthotospovirus (TSWV) across life cycles in TürkiyeOriginal Paper

Hakan Fidan, Ailar Gonbad, Yasin Emre Kitis

Plant Protect. Sci., 2024, 60(2):127-138 | DOI: 10.17221/118/2023-PPS

Tomato spotted wilt orthotospovirus (TSWV) is destroying tomato and pepper resistance all over the world, including Antalya (Türkiye). Two greenhouses that show infection of TSWV in the Serik (coastal) and Elmali (highland) areas were chosen for research between 2019 and 2021 to better understand the disease's life cycle. During the surveys, we focused on weed hosts to better understand TSWV disease's cycle. TSWV infection was determined in 58 peppers, 34 tomatoes, 270 weeds, and 20 other vegetable samples. Weed samples revealed essentially no symptoms, however, grown plants showed classic TSWV symptoms. The Asteraceae family had the highest infection rate among infected weeds, followed by weed species from the Poaceae and Solanaceae families. In addition, to determine the viral strain in the infected plant samples, qRT-PCR and Melt-curve analysis were done using a specially designed primer pair for the study. This primer identifies the point mutation on the NSm-movement protein in the viral genome's medium segment. The non-resistance breaking isolate of TSWV was included in the optimisation studies to evaluate differences between the two isolates at two thermal melting values established by this comparison. These findings demonstrated that the kits, procedures, and primers employed in this investigation can serve as a quick and reliable diagnostic tool for identifying TSWV isolates and that weeds are a key intermediate source for new TSWV infection, as confirmed by sequence data.

The content and potential ecological risk assessment of heavy metals in coastal wetlands around the Bohai SeaOriginal Paper

Yingchun Lv, Mengyi Wang, Wanxin Tian, Haibin Hui

Plant Soil Environ., 2024, 70(6):356-365 | DOI: 10.17221/24/2024-PSE

Coastal wetlands play a vital role in the migration and transformation of heavy metal pollutants in watersheds. There were 30 surface sediment samples that were analysed to investigate the distribution and ecological risks of heavy metals in the coastal wetlands around the Bohai Sea. Our results showed that the average concentrations of Pb, Cr, Ni, Cu, Zn, and Cd in these wetlands were 17.92 ± 5.81, 50.29 ± 20.50, 31.53 ± 9.71, 25.37 ± 4.29, 80.13 ± 15.11, and 0.92 ± 0.54 mg/kg, respectively. Relative to other wetlands, Pb (25.43 ± 2.68 mg/kg) and Cd (1.67 ± 0.06 mg/kg) contents were higher in the Liaohe Delta wetland (LHDW). Cu (28.44 ± 3.71 mg/kg), Cr (83.11 ± 5.80 mg/kg), and Ni (45.91 ± 3.02 mg/kg) contents were higher in the Yellow River Delta wetland (YRDW). The Zn (120.86 ± 7.41 mg/kg) content was higher in the Qilihai wetland. Heavy metal concentrations in coastal wetland sediments are shown to be positively correlated with organic matter content. Our results showed that the concentration of heavy metals decreases with increasing sediment particle size. In this study, Cd showed the highest pollution index and, therefore, more attention should be paid to the potential ecological risks of Cd in coastal wetlands around the Bohai Sea, especially in the LHDW and YRDW.

Biostimulants and herbicides shape the structure of potato tuber yieldOriginal Paper

Krystyna Zarzecka, Marek Guga³a

Plant Soil Environ., 2024, 70(7):468-473 | DOI: 10.17221/103/2024-PSE

The aim of the study was to assess the impact of three biostimulants and a herbicide on selected unit parameters of potato yield. The research results came from a three-year field experiment that was established using the randomised sub-blocks method in three replications. In the experiment, two cultivars of edible potato were grown and the yield-protective effect of treatments was assessed: (1) control object without protection with preparations; (2) herbicide clomazone + metribuzin; (3) biostimulant PlonoStart and herbicide clomazone + metribuzin; (4) biostimulant Aminoplant and herbicide clomazone + metribuzin, and (5) biostimulant Agro-Sorb Folium and herbicide clomazone + metribuzin. As a result of the limited competition of weeds in the objects with the use of biostimulant and herbicide, a higher average weight of one potato tuber, a higher share of commercial tubers > 35 mm and a higher share of large tubers > 50 mm was obtained compared to the control object. The highest average weight of one tuber (108.2 and 85.4 g, respectively) and the highest share of commercial (97.1 and 96.3%, respectively) and large tubers (60.6 and 60.5%, respectively) were obtained in the objects where the Agro-Sorb Folium biostimulant + Avatar 293 ZC herbicide were used. and PlonoStart + Avatar 293 ZC. The correlation analysis confirmed a significant negative relationship between the number of weeds and average weight of one potato tuber, share of commercial tubers and share of large tubers. Weather conditions during the conduct of the research also significantly differentiated weed numbers and quality parameters of potato yield.

Determining saturated hydraulic conductivity of a repacked loam soil by the simplified falling-head technique: Impact of sieving duration and scraping of exposed surfacesOriginal Paper

Dario Autovino, Vincenzo Bagarello, Gaetano Caltabellotta, Mariachiara Fusco, Massimo Iovino

Soil & Water Res., 2024, 19(4):210-217 | DOI: 10.17221/79/2024-SWR

Many methods are used in a laboratory for packing sieved soil. Determination of soil properties is expected to vary with the applied packing method. The objective of this investigation was to test the impact of initial soil sieving duration and scraping of exposed soil surfaces on saturated hydraulic conductivity (Ks) of an initially air-dry loam soil determined by the simplified falling-head technique. Two sieving durations (5 and 30 min) were considered. A brush was used to scrape exposed surfaces for half of the tested soil columns. A long sieving yielded finer soil than a short sieving and 9–22% smaller values of Ks. Scraping the exposed soil surfaces yielded 4–17% smaller Ks values than those obtained on the not scraped columns. None of the observed differences was statistically significant. Therefore, sieving duration and treatment of the exposed soil surfaces were minor factors influencing the determination of Ks. Reaching general conclusions about sieving duration and scraping effects requires testing these factors with other soils, initial soil water conditions and Ks measurement techniques.

Effect of the combination of nitrapyrin and gamma-aminobutyric acid on soil nitrogen transformation characteristics and rice yieldOriginal Paper

Furong Xiao, Chen Feng, Dongpo Li, Lili Zhang, Yonghua Li, Yandi Du, Yan Xue, Ping Gong, Yuchao Song, Ke Zhang, Yiji Zhang

Plant Soil Environ., 2024, 70(8):509-522 | DOI: 10.17221/95/2024-PSE

When 2-chloro-6-(trichloromethyl) pyridine (nitrapyrin) is applied alone, it typically does not significantly increase crop yield. Therefore, we combined gamma-aminobutyric acid (GABA) with nitrapyrin to address the limitations of nitrapyrin in enhancing yield. We conducted indoor incubation experiments and pot experiments in Chernozem and Calcic Kastanozem, respectively. The results demonstrated that GABA exerted an influence on the effectiveness of nitrapyrin by altering its degradation rate. In Chernozem, GABA accelerated nitrapyrin degradation, whereas, in Calcic Kastanozem, the results were the opposite. The pot experiment results showed that the combination of nitrapyrin and GABA increased rice total biomass by 5%, grain yield by 18 ± 2%, and plant nitrogen (N) uptake by 9 ± 1% compared to nitrapyrin applied alone. The increase in yield was attributed to the combined effect of nitrapyrin and GABA, which elevated root biomass and leaf area. In contrast, the effect of GABA on yield through altering the degradation rate of nitrapyrin was weaker. Therefore, the combination of nitrapyrin and GABA combined with urea increases rice yields in Chernozem and Calcic Kastanozem. The aim of this endeavour was to foster the development of a novel fertiliser product that offers both favourable agronomic outcomes and environmental benefits.

Effect of tannin degradation of mangrove (Sonneratia alba) fruit on nutrient digestibility, protozoa population and methane gas productionOriginal Paper

Elihasridas Elihasridas, Roni Pazla, Novirman Jamarun, Gusri Yanti, Sharli Asmairicen, Leni Marlina, Maureen Chrisye Hadriatry, Ratna Wylis Arief, Hadriana Bans

Czech J. Anim. Sci., 2024, 69(7):292-301 | DOI: 10.17221/38/2024-CJAS

This study examined the fermentation duration in relation to the effectiveness of tannin levels in mangrove (Sonneratia alba) fruit during the fermentation process using Aspergillus niger. The tested durations were 7, 10, 13, and 16 days in anaerobic conditions. The outcomes measured included crude fat, crude fibre, and nitrogen-free extract digestibility. Microbial biomass, protozoa population, and methane gas production were also recorded as responses to the rumen microbial activity. The results showed that 16 days of fermentation gave the highest average for all responses. The protozoa population reached around 4.07 × 105 cells/ml and methane gas amounted to 33.9 ml/g of dry matter (DM). This is caused by a decrease in the anti-nutrient tannin content in mangrove (S. alba) fruit due to fermentation by A. niger according to treatment. The conclusion of this research is that the 16-day fermentation treatment (T4) of mangrove fruit is the optimal time to be used as a source of concentrate feed for livestock in terms of the increase in nutritional value and gastrointestinal microbes represented by total protozoa population, crude fibre digestibility, crude fat digestibility, and the highest nitrogen-free extract digestibility. However, microbial biomass and methane gas production were not significantly different in this study.

Effect of the disinfectant benzalkonium chloride on Listeria monocytogenes biofilmOriginal Paper

Chao Yang, Xiaochen Zhang, Tao Yu, Lin Wang, Zichuan Zhu, Xinjie Fan

Czech J. Food Sci., 2024, 42(4):295-304 | DOI: 10.17221/44/2024-CJFS


Listeria monocytogenes is capable of forming biofilms on the food contact surfaces, increasing the risk of food contamination by this pathogen. The disinfectant benzalkonium chloride (BC) is commonly used to control L. monocytogenes in the food industry. This study aimed to investigate effects of BC on L. monocytogenes biofilms. Biofilm biomass was measured by the microplate method with crystal violet staining. Results from the broth microdilution method showed that the minimum inhibitory concentration (MIC) of BC against L. monocytogenes 10403S was 8 μg·mL–1. Sub-MICs of BC inhibited the biofilm formation and lethal concentrations of BC removed mature biofilms of L. monocytogenes 10403S. The presence of BC reduced extracellular proteins and exopolysaccharides in biofilms. Additionally, upregulation of quorum sensing gene luxS and agrBDCA and downregulation of flagellum motility genes flaA, motA, and motB were observed in the presence of BC. The BC disinfectant has an excellent anti-biofilm activity against L. monocytogenes.

Anti-diabetic effect of rice extract constituents through the molecular inhibition of α-amylase and α-glucosidase activityOriginal Paper

Subhashini Ramakrishnan, Thomas Jebastin, Sumathy Raj, Ariyamuthu Ramathilaga, Rithik Selvaraj, Najat A. Bukhari A., Ashraf Atef Hatamleh, Anis Ahamed

Plant Soil Environ., 2024, 70(11):683-694 | DOI: 10.17221/150/2024-PSE

Carbohydrate digestive enzymes like α-amylase and α-glucosidase can be used to treat and manage diabetes. By inhibiting these enzymes, carbohydrate digestion slowed down, lowering the level of glucose entry into the bloodstream and preventing postprandial hyperglycemia. However, the effectiveness of current antidiabetic agents is limited due to their adverse effects. Therefore, the current study explored natural inhibitors from the methanol extract of rice to combat this issue. Through an integrated approach, four different rice cultivars were analysed and found that red rice methanol extract compounds stigmasterol and 1,2-benzenedicarboxylic acid interacted with α-amylase and α-glucosidase. Additionally, further research on stigmasterol directs the structure-activity relationship studies that aid in managing diabetic conditions.

Serendipita indica improve seed germination and seedling growth of Lolium multiflorum Lam. through amelioration of osmotic adjustment, nutrient accumulation and Na+/K+ homoeostasis under salinity conditionsOriginal Paper

Binghua Liu, Xinghong Liu, Lianjia Yu, Xingjian Dun, Hailin Ma, Fangchun Liu, Lin Peng

Plant Soil Environ., 2024, 70(10):644-655 | DOI: 10.17221/244/2024-PSE

A pot experiment was carried out to determine the effect of Serendipita indica on the salt response of Lolium multiflorum Lam. Although the salinity decreased the root colonisation of S. indica by 28.34%, successful colonisation of S. indica increased the seed germination rate, fresh weight, leaf relative water content and chlorophyll content by 28.09, 59.01, 38.78 and 28.80%, respectively, compared with uncolonised seedlings. Under salinity, leaf malondialdehyde content, leaf relative electrical conductivity, as well as Na+ content and Na+/K+ ratio in leaves and roots of S. indica-colonised seedlings were decreased by 33.99, 33.31, 63.40% and 47.42, 85.66 and 55.88%, respectively, compared with uncolonised seedlings. Meanwhile, compared with uncolonised seedlings under salinity, the contents of proline in leaves, N, P and K+ in leaves and roots of the S. indica-colonised seedlings were increased by 47.47, 45.69 and 30.05%, and 41.77, 19.51, 19.18 and 155.00%, respectively. These results indicate that S. indica colonisation confers salt tolerance in L. multiflorum seedlings by enhancing osmotic adjustment via actively accumulating proline and K+, increasing the uptake of nutrients such as N and P, and improving Na+/K+ homoeostasis. The study would provide a new idea for the combined application of salt-tolerant plants and symbiotic microorganisms in the ecological restoration of saline-alkali lands.

Effect of thermal management on vitellogenesis and maturation in indoor-reared pikeperch (Sander lucioperca)Original Paper

Uro¹ Ljubobratoviæ, László Ardó, Georgina Fazekas, Zoltán Horváth, Jovanka Lukiæ

Czech J. Anim. Sci., 2024, 69(1):18-28 | DOI: 10.17221/136/2023-CJAS

The present study aimed to assess the effects of thermal manipulation on the vitellogenesis and final oocyte maturation (FOM) in pikeperch. Two groups of fish were stocked in two separate tanks of the climate chamber. One group was stocked at 10-month age (THERMAL), while the other was continually kept under stable photothermal conditions until 19-month-age (CONTROL) and then transferred to a climate chamber. The progress of vitellogenesis was assessed via evaluation of the oocyte diameter at the mid- and late-autumn phases, and the gonadosomatic index (GSI) at the late-autumn phase. Finally, females from the CONTROL group were hormonally stimulated before (WARMING) and after (STABLE) increase of the temperature from wintering to spawning, and the FOM progress, ovulation and plasma levels of 17 α, 20β dihydroxy progesterone (DHP) were assessed. Significantly larger oocytes at the mid-autumn phase (878.8 ± 40.1 μm vs 836.5 ± 46.5 μm) as well as the GSI at the end of the autumn phase (10.5 ± 1.7% vs 7.6 ± 1.1%) were noticed in THERMAL fish. Significantly faster FOM was seen in fish under the WARMING post-stimulation regime, and these fish had higher DHP levels at the moment of hormonal stimulation (5.4 ± 1.4 ng/ml vs 3.8 ± 1.2 ng/ml). According to the obtained results, it appears that photothermal induction of fish at a younger stage might have a positive impact on the first spawning, while the WARMING thermal regime seems to be more efficient in stimulating the FOM in fish upon first wintering.

Effect of physical energy on germination and seedling vigor of alfalfa seeds (Medicago sativa L.)Short Communication

Ali Hajizadeh Namin, Abbas Akbarnia, Rouzbeh Abbaszadeh, Ali Zenouzi, Majid Masoumian

Res. Agr. Eng., 2024, 70(3):174-180 | DOI: 10.17221/114/2023-RAE

Recently, non-thermal technologies have emerged as a means to ensure the safety of agricultural products while also promoting plant growth and reducing pathogenic and chemical contamination of seeds. An experiment was conducted to investigate the effect of various treatments on the germination characteristics of alfalfa seeds. The experiment utilised a completely randomised design with five treatments and three replications, including cold plasma exposure, direct current (DC) electromagnetic field, magnetic field, and a combination of plasma exposure with magnetic and electromagnetic fields. The treated seeds were compared to the control seeds (without exposure) in terms of seedling length, germination rate index (GRI), vigor index, and seed germination. The results indicated that cold plasma treatment and a combination of plasma and magnetic field treatment significantly increased the germination rate compared to the control and other treatments. Furthermore, the combined treatment of plasma and electromagnetic fields, as well as the individual treatment with magnetic fields, resulted in a significant increase in root length and, consequently, the allometric coefficient. Non-thermal technologies are a promising approach to enhancing seed performance, particularly in terms of the rate of germination and seedling length.

The sex ratio of spruce bark beetles – Ips typographus (Coleoptera: Curculionidae: Scolytinae) captured in different types of trapsOriginal Paper

Marie Zahradníková, Jaroslav Dostál, Petr Zahradník

J. For. Sci., 2024, 70(12):603-609 | DOI: 10.17221/55/2024-JFS

In forest protection, various types of trap systems are used against spruce bark beetles to treat the foci of infested areas. Traditionally, these include pheromone traps, treated trap trees, and recently also the application of Storanet insecticide nets used for the sanitation of infested wood (trees), which also serve as treated trap trees when pheromones are applied, and the Trinet P system, a variation to a treated trap tree – a tripod. On an aluminium tripod, there is a Storanet insecticide net baited with a pheromone dispenser similar to other types of trap systems. The sex ratio proves to be a significant aspect in the assessment of individual types of trap systems. It is more favourable to catch a larger number of female individuals given that they bear the future development of the population. With a higher number of captured male individuals, the number of females per one male in the insect gallery increases, and the population cannot be reduced sufficiently. The results show that all three types of measures can be characterised by a lower ratio of captured males (approximately 40%) and a higher representation of females (around 60%). Differences in individual types of trap systems are insignificant.

A GLMER-based pedotransfer function expressing the relationship between total organic carbon and bulk density in forest soilsOriginal Paper

Václav Zouhar, Ale¹ Kuèera, Karel Drápela

J. For. Sci., 2024, 70(12):619-633 | DOI: 10.17221/48/2024-JFS

Owing to its role in mitigating CO2 in the atmosphere, the total organic carbon (TOC) stock of soil, a key component of the terrestrial carbon cycle, is of significant interest as regards climate change. To determine TOC stock, it is first necessary to determine the soil's bulk density (BD), determined through intact soil sampling; however, in forest soils, it can be difficult to determine BD in soils with high levels of stoniness and/or tree root coverage. Furthermore, the method is time-consuming and labour-intensive, making it impractical for studies over large areas. In such cases, BD can be determined using a pedotransfer function (PTF) expressing the relationship between forest soil TOC and BD. The aim of this study was to determine a forest soil PTF using actual data obtained from 777 soil pits dug as part of the Czech Republic's National Forest Inventory (NFI). Within the NFI, BD is assessed from undisturbed core samples, while TOC is assessed from mixed samples from the same soil genetic horizons. Both generalised linear (GLM) and generalised linear mixed-effects (GLMER) models were used, with the final GLMER model best expressing the relationship for individual natural forest areas within the NFI dataset. The GLMER-based PTF described in this study can be widely applied to accurately estimate soil BD via TOC concentration at temperate forest sites where stoniness and/or root cover previously made it technically impossible to take undisturbed samples using standard methods.

Impacts of management and changed hydrology on soil microbial communities in a floodplain forestOriginal Paper

Jiøí Volánek, Martin Valtera, Ladislav Holík, Martin Kománek, Hana Burdová, Josef Trögl, Diana Polanská Nebeská, Jitka Novotná, Pavel Samec, David Juøièka

J. For. Sci., 2024, 70(11):574-592 | DOI: 10.17221/44/2024-JFS

Long-term human activities substantially altered floodplain regions of temperate Europe. Forest management and extensive changes in hydrology greatly affected natural floodplain soil properties, in which microbes play key roles. This study aims to assess the effects of human activities through a gradient of forest management intensity on soil microbial community (SMC), its biomass, activity, and structure. Soil chemical and physical-chemical properties were used to explain the general associations and within-site variation using principal component analysis (PCA), linear regression (LR) and linear mixed-effect regression (LMER) models. It was found that forest management application, regardless of its intensity, led to significant microbial biomass reduction. PCA revealed that microbial biomass, expressed as a sum of phospholipid fatty acids along with recalcitrant carbon fraction (ROC) best explained the variability in data. LR and LMER highlighted that bacteria are affected by floodplain forest management more than fungi, and that bacterial response to pH was highly diversified. Also, pH was identified as the best predictor of SMC structure and activity but not of its size. The study calls for further investigation in SMC interactions with ROC, soil-available Fe and Mn, and the role of redox-active metals in soil organic carbon degradation.

Effects of elevated CO2 and cadmium stress on vegetable quality and cadmium accumulationOriginal Paper

Xiao Wang, Deyan Li, Xiaohui Song

Hort. Sci. (Prague), 2024, 51(4):270-277 | DOI: 10.17221/131/2023-HORTSCI

The aim of this study was to determine the effects of elevated CO₂ (eCO2) on the quality and cadmium (Cd) accumulation of vegetables grown in soil with a background Cd level or in Cd-contaminated soil. We used four types of vegetable: pak choi (Brassica rapa L.), water spinach (Ipomoea aquatica Forssk.), cherry radish (Raphanus raphanistrum subsp. sativus (L.) Domin) and pepper (Capsicum annuum L.). Cd stress significantly reduced vegetable vitamin C and reducing sugar content; however, under eCO2, vitamin C and reducing sugar content levels were significantly higher than they were under ambient CO2 (aCO2) levels. The nitrate content of pak choi, cherry radish and pepper was reduced under eCO2, and the effect was more pronounced among plants grown under Cd stress. The Cd content of cherry radish and pepper roots grown under eCO2 and Cd stress was significantly reduced (29.2% and 18.5%, respectively) compared with plants grown under aCO2 conditions and Cd stress. The Cd transfer coefficient of pak choi and water spinach grown under eCO2 and Cd stress was significantly lower (22.7% and 25.2%, respectively) than under aCO2 conditions. Our data suggest that growing vegetables under eCO2 is beneficial, especially when grown in Cd-contaminated soil, because Cd accumulation is reduced and vegetable quality is improved.

Effects of temporal variation and grazing intensity on leaf C : N : P stoichiometry in Northwest desert, ChinaOriginal Paper

Helong Yang, Yiqiang Dong, Shazhou An, Zongjiu Sun, Peiying Li, Huixia Liu

Plant Soil Environ., 2024, 70(3):154-163 | DOI: 10.17221/356/2023-PSE

The Seriphidium transiliense desert pasture is an important spring-autumn pasture in northern Xinjiang, China, and has been subjected to grazing by livestock at different intensities, thus resulting in widespread deterioration of its biodiversity and ecosystem services. To understand the response mechanism of stoichiometric characteristics of desert vegetation to grazing, the leaf carbon (C), nitrogen (N), phosphorus (P) and C : N : P ratios of S. transiliense were studied under different grazing intensities. The results show that the control S. transiliense leaf C, N and P contents and C : N, C : P and N : P ratios were 458.79 ± 53.5 g/kg, 20.6 ± 7.18 g/kg, 2.83 ± 1.24 g/kg, 25.69 ± 11.08, 190.28 ± 75.65 and 8.21 ± 4.01, respectively. The differences in these characteristics varied with grazing intensity in accordance with sampling time, so both factors need to be considered comprehensively. General linear model (GLM) analysis indicated that grazing intensity had a strong main effect on S. transiliense leaf C, N, and P content, C : N ratio and N : P ratio. As grazing intensity increased, the leaf N content and N : P ratio increased (P < 0.01), and the C : N ratio decreased (P < 0.01). N content was the limiting factor for the growth of S. transiliense, but the grazing intensity, sampling year and growth season each affected the degree of N limitation. Our findings suggest that the remaining moderate stocking rate was essential for sustaining desert stabilisation in Xinjiang, and although S. transiliense could adapt its nutrient content and leaf stoichiometry to the grazing intensity, N was always the limiting element for the growth of S. transiliense.

Accidental salinomycin intoxication in European fallow deer (Dama dama L.)Case Report

M Svoboda, O Huml, P Chomat, A Honzlova, J Illek, Z Svobodova, L Hofmannova, H Modra

Vet Med - Czech, 2024, 69(1):18-29 | DOI: 10.17221/100/2023-VETMED


Salinomycin, belonging to ionophore antibiotics, has been used as a feed additive for poultry for its coccidiostatic effect. Poisoning by ionophore antibiotics has been reported in cattle and other sensitive animals due to the replacement of medicated feed and/or accidental overdoses. The aim of this paper is to report the toxicity of salinomycin for fallow deer and to describe the different levels of sensitivity of cervids to this substance. In the presented case study, a medicated feed containing ivermectin used for deworming red deer and fallow deer was accidentally contaminated with sodium salinomycinate in a concentration of 252.6 mg/kg. The contaminated feed was consumed by the animals over a period of four days. The mortality of fallow deer within 12 days was 58%. No mortality was recorded in the red deer. In the affected animals, clinical signs associated with acute and congestive heart failure were observed. The biochemical examination indicated prerenal azotaemia caused by circulatory insufficiency and ion imbalance. The histological examination revealed pronounced focal acute cardiomyopathy and massive subacute myopathy in the skeletal muscles.

Effects of spring low-temperature stress on winter wheat seed-setting characteristics of spikeOriginal Paper

Xiang Chen, lvzhou Liu, Hongmei Cai, Baoqiang Zheng, Jincai Li

Plant Soil Environ., 2024, 70(2):84-92 | DOI: 10.17221/313/2023-PSE


Global climate change leads to frequent occurrence of low-temperature stress (LTS), which poses a serious threat to global food security. Here, environment-control phytotron experiments were conducted on cold-responsive cv. XM26 and cold-tolerant cv. YN19 during the anther differentiation period. Six LTS levels (4, 2, 0, −2, −4, −6 °C) and a control treatment (10 °C) were set to study the effects of different levels of LTS on wheat seed-setting characteristics and yield. LTS significantly decreased grain number per spike, 1 000-grain weight, and grain yield per plant (GYPP) of the two wheat cultivars. Each spike’s grain number and weight distribution showed a quadratic curve, and the near-medium dominance of grain development was not affected by temperature. The grain number percentage and grain weight of wheat at different grain positions were G2 (2nd grain position) ≥ G1 (1st grain position) > G3 (3rd grain position) > G4 (4th grain position), in which G3 and G4 grain positions were more sensitive to LTS. In summary, LTS during the anther differentiation in wheat mainly led to a decrease in GYPP by significantly reducing the number and weight of inferior grains. Improving wheat cultivation measures and promoting the development of inferior grains are significant ways to prevent disasters and increase wheat quality and productivity in the future.

The effect of conidia density and application frequency of the entomopathogenic fungus Aschersonia aleyrodis in controlling silverleaf whitefly (Bemisia tabaci) on tomato (Solanum lycopersicum Linnaeus)Original Paper

Sudarjat, Fitri Widiantini, Yula Salsabila, Syariful Mubarok

Plant Protect. Sci., 2024, 60(1):80-88 | DOI: 10.17221/74/2023-PPS

One of several important pests that attack tomato plants is the silverleaf whitefly (Bemisia tabaci) (Hemiptera: Aleyrodidae). An eco-friendly method to control B. tabaci utilizes the entomopathogenic fungus, namely Aschersonia aleyrodis. This study aimed to determine the effect of A. aleyrodis conidia density and the frequency of its application to control silverleaf whitefly (B. tabaci) pest on tomato plants under screen house conditions. This study used a randomized completely block design (RCBD) to test ten combination treatments. Each treatment was repeated three times. The results showed that application of A. aleyrodis at conidia densities of 106 conidia/mL, 107 conidia/mL, and 108 conidia/mL with an application frequency of up to once every three weeks was still effective in controlling B. tabaci populations on tomato plants. The highest population suppression rates for B. tabaci (90.6%), tomato yield (1 009 g/plant and 16 fruits/plant), percentage of mycosis (96.6%), and percentage of mummification (97.3%) were found to occur at a conidia density of 108 conidia/mL with the application frequency of once a week.

Study of substitution of beef and tapioca flour with tuna meat and purslane flour on meatball qualityOriginal Paper

Nafly Comilo Tiven, Tienni Mariana Simanjorang

Czech J. Food Sci., 2024, 42(1):64-70 | DOI: 10.17221/196/2023-CJFS


Tuna meat (Thunnus atlanticus – blackfin tuna) and purslane flour (Portulaca oleracea L.), which contain high protein and polyunsaturated fatty acids but are low fat and cholesterol, are used to substitute beef and tapioca flour to produce quality meatballs. This study aims to determine the effect of substituting beef and tapioca flour with tuna meat and purslane flour on meatballs' chemical, physical, and sensory quality. The beef was substituted with 40% tuna meat, and tapioca flour was substituted with 0, 10, and 20% purslane flour. The data obtained were analysed using a complete randomised design, with three treatments and five replications, respectively, and further tested with the Duncan test. The results showed that increasing the level of purslane flour can increase (P < 0.01) the chemical quality (water, protein, fat, ash, and omega-3) but decrease (< 0.01) the cholesterol of the meatballs. Physical quality (water holding capacity and sensory quality (colour) of meatballs were increased (P < 0.01), but taste and acceptability were decreased (< 0.01). It can be concluded that substituting beef and tapioca flour with tuna meat and purslane flour can increase the chemical and physical quality.

Comparison of experimental and numerical results on flow uniformity of seeds transmitted from the studded feed rollerOriginal Paper

Mustafa Gokalp Boydas

Res. Agr. Eng., 2024, 70(1):43-52 | DOI: 10.17221/34/2023-RAE

Studded feed rollers are widely used in seed metering units of seed drills. The flow evenness is an important indicator of the performance of studded feed rollers. With this research, the effects of studded feed rollers with different stud numbers (27, 36, and 45 studs) on flow evenness were investigated both in the laboratory and by simulation in case of using different ground speeds (1.5, 2, and 2.5 m·s–1). While the experiments were carried out on the seed drill model prepared in the laboratory, the simulation was done with the Rocky DEM software program. In the laboratory and simulation studies, it was determined that the flow evenness increased with the increase in the number of studs and the ground speed. The results obtained from the laboratory and simulation studies show parallelism with each other. However, it was seen that the results obtained in the laboratory were slightly higher than the results obtained from the simulation. With this study, it has been seen that it would be very beneficial to use the DEM model to improve the performance of the seed metering unit and to develop a new seed metering unit.

Impact of information and communication technologies in agroecological cooperativism in CataloniaOriginal Paper

Ricard Espelt, Ismael Peña-López, Oriol Miralbell, Toni Martín, Núria Vega

Agric. Econ. - Czech, 2019, 65(2):59-66 | DOI: 10.17221/171/2018-AGRICECON

In Catalonia, agroecological cooperativism is part of a set of alternatives that appeared as a response to the current hegemonic food consumption model, controlled by large commercial establishments. It is defined by its promotion of short food supply chains (SFSCs), operates under the values of the social and solidarity economy (SSE) and holds a strong political commitment. This article, on the one hand, studies the setup of agroecological cooperativism understood as the outcome of a network of producers, intermediaries and consumers and, on the other hand, examines the impact of information and communication technologies (ICT) in the development of this consumption model. The data has been obtained through on-site interviews and online research on the 56 consumer groups and cooperatives present in Barcelona. Descriptive statistics and correlation analysis have been used to study them. The results prove the salient role that ICT has as a facilitator in the relational network established between the agents that take part in it, thus becoming a key characteristic element of the new agroecological consumer cooperativism.

Is money more important than status? A case of Romanian peasantsOriginal Paper

Lucia Ovidia Vreja

Agric. Econ. - Czech, 2022, 68(4):146-157 | DOI: 10.17221/383/2021-AGRICECON

Agriculture has lost its importance in many parts of the world, leaving peasants in a state of uncertainty regarding their social status and identity. This article uses both quantitative and qualitative data to present the changes experienced by Romanian peasants as a result of an entire series of processes which led to the loss of their place within society. Statistical data are used to illustrate the evolution of the most relevant agriculture-related indicators over the last three decades. Qualitative data are presented in order to explain how developments in agriculture were perceived by peasants. While the changes might be irreversible, the story of the 'old' class of peasants should constitute a starting point for redesigning national policies and avoiding the disintegration of an entire social class.

Comparison of the effects of Aloe vera gel and coconut oil on the healing of open wounds in ratsOriginal Paper

O Istek, M Tanrisever, S Kucukler, B Karabulut, A Cevik

Vet Med - Czech, 2023, 68(1):17-26 | DOI: 10.17221/101/2021-VETMED

In this study, the effects of Aloe vera gel and coconut oil on wound healing were investigated and compared in rats. Forty-two Wistar albino rats were used during the experiment, in which they were operated on under general anaesthesia to create two full-thickness open skin wounds (created with a 0.5 cm diameter punch biopsy apparatus) on both back sides of the median line. A total of 42 rats were divided into three groups of 14 animals each to receive the topical application of Aloe vera gel (AV group – n = 14), coconut oil (CO group – n = 14) and cold cream (CONT group – n = 14). The medical applications were performed twice a day in all the groups. The wound borders were marked on a transparent sheet every day. Afterwards, this sheet was transferred to the millimetre graph paper. On days 0, 7, and 14, the unhealed wound area was measured in all the groups. On days 7 and 14, seven rats in each group were euthanised. Then, skin samples including the intact skin were taken from the wound sites for histopathological and biochemical evaluations. The topical application of Aloe vera gel showed a significant increase in the healing process of the open wounds in terms of the clinical evaluation, histopathological and biochemical data averages when compared with the coconut oil and cold cream groups of rats (P < 0.05). The results obtained in the present study demonstrate that Aloe vera gel may provide a good alternative for the treatment of open wounds.

Forest fire area detection using Sentinel-2 data: Case of the Beni Salah national forest ‒ AlgeriaOriginal Paper

Rabah Zennir, Boubaker Khallef

J. For. Sci., 2023, 69(1):33-40 | DOI: 10.17221/50/2022-JFS



Forest cover plays an important role in terms of biodiversity and the environment. The Beni Salah national forest in its part which is located in the Guelma province in the extreme northeast of Algeria is an illustrative example where forest fires represent the chronic phenomenon which weighs heavily on this forest. The present study comes after a forest fire that occurred in 2021, when 3 000 ha of this forest were ravaged by forest fires according to the conservation of forests of Guelma. The main objective of this research is to map the severity of burns and estimate the severely burned area using Sentinel-2 satellite images based on remote sensing indices such as Normalized Difference Vegetation Index (NDVI), Differenced Normalized Difference Vegetation Index (dNDVI), Normalized Burn Ratio (NBR), Differenced Normalized Burn Ratio (dNBR), Green Normalized Difference Vegetation Index (GNDVI), Differenced Green Normalized Difference Vegetation Index (dGNDVI), Burn Area Index (BAI) and Relativized Burn Ratio (RBR). The result obtained revealed that 28.23% of the study area represents a seriously burned area. The established burn severity map is a real decision-making tool, but it still has certain limitations.

Model development and optimisation of the disc plough efficiency on loamy-sand soil in South-East NigeriaOriginal Paper

Okechukwu Oduma, Precious Ehiomogue, Dilibe Ifanyi Ntunde

Res. Agr. Eng., 2023, 69(1):9-17 | DOI: 10.17221/72/2021-RAE


This study was conducted to model and optimise the efficiency of a disc plough on loamy-sand soil in South-East Nigeria to aid farmers to examine and choose the right ploughing implement based on the soil type for an effective and bountiful production. The operational speed and cutting depth were taken as factors for the study of the plough efficiency. The results revealed that the highest field efficiency of 80% was noted when the plough worked at the cutting depth of 30 cm and a speed of 5 km·h–1 while the lowest efficiency of 68.10% was achieved at a speed of 9 km·h–1 and a depth of 10 cm. The quadratic model was significant for the response (P < 0.05). The results indicated that the coefficient of determination (R2) was 0.98, which specified the high correlation among the factors. The predicted R² (0.76) was consistent with the adjusted R² of 0.96. The adequacy precision of 24.89 showed a suitable indicator and that the model could navigate the design space. The optimum field efficiency and the desirability of 77.50% and 1.00 were, respectively, obtained at an optimum speed of 7 km·h–1 and a cutting depth of 30 cm. Farmers can, however, assess and select the implements with the aid of the developed model.

Inoculation with Bacillus alters nitrogen uptake and metabolism in roots of Diospyros lotus under wheat straw addition in soilOriginal Paper

Peng Zhang, Fengge Hao, Zitan Zhu, Dongmei Lang, Huiling Hu

Plant Soil Environ., 2023, 69(10):463-470 | DOI: 10.17221/225/2023-PSE


A 15N-labelling technique was carried out to investigate the effect of wheat straw co-application with Bacillus nealsonii, Cohnella, and Paenibacillus lautus on N uptake and assimilation in Diospyros lotus. Wheat straw combined with Bacillus increased the plant height, biomass accumulation, photosynthetic capacity, and uptake of 15N by roots, with 15N accumulating mainly in leaves of D. lotus. The NO3-N content in roots and leaves were decreased by wheat straw co-application with Bacillus, whereas NH4+-N, soluble protein, and total N contents were increased. Wheat straw addition promoted the activities of nitrate reductase, glutamine synthase and glutamate synthase in roots rather than in leaves. These N assimilation enzymatic activities, and glutamic-oxaloacetic transaminase and glutamic pyruvic transaminase activities were markedly increased by wheat straw combined with Bacillus. Moreover, the combined application of wheat straw and Bacillus, particularly B. nealsonii, improved the N use efficiency. These findings suggest that the combined application of wheat straw and Bacillus improved D. lotus growth by increasing N uptake, metabolism, and utilisation efficiency.

 previous    ...   30   31   32   33   34  35   36   37   38   39   ...    next