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Results 1951 to 1980 of 4875:

Three scenarios for tree species composition and stand age in new and permanent forest areas: A case study of LatviaOriginal Paper

Zigmārs Rendenieks, Līga Liepa

J. For. Sci., 2023, 69(10):438-450 | DOI: 10.17221/25/2023-JFS

Land abandonment and the emergence of new forest areas create novel dynamics for forest ecosystems and landscapes. Modelling is often used to forecast tree species composition, age group distribution and spatial patterns in the future. The aim of this study was to develop three scenarios for changes in tree species composition, stand age distribution and spatial patterns of new forest areas and permanent forests using Latvia as a case study. We selected 19 study areas of the size 10 km × 10 km to sample the variety of forest cover patterns, tree species, and stand age. Using GIS tools, we developed three scenarios: baseline, commercial and conservation. Results showed that the conservation scenario resulted in the most even-aged group distribution. Scenarios predicted the increase of Picea abies area (reaching 29.3% in permanent forests and even 45.7% in new forests) and the reduction of Pinus sylvestris in most cases. Changes in the median patch area were the best indicator for evaluation of different scenarios with the largest patches of new forest areas for the conservation scenario (1.92 ± 1.23 ha). The existing structural and compositional integrity of sampled forest landscapes was best retained under the baseline and conservation scenarios, while the commercial scenario indicated more fragmented forest landscapes in the future.

Progression of wheat Tan spot under different bioclimatic stages and agricultural practicesOriginal Paper

Salma Tissaoui, Noura Omri-Benyoussef, Hatem Chaar, Marwa Hassine, Jean-stephane Venisse, Bouzid Nasraoui, Amira Mougou-Hamdane

Plant Protect. Sci., 2023, 59(3):233-244 | DOI: 10.17221/103/2022-PPS

Tan spot, caused by Pyrenophora tritici-repentis, is a severe worldwide wheat foliar disease and has become common in Tunisia. Two hundred wheat field surveys were conducted in northern Tunisia during the 2017–2019 seasons to determine disease intensity and the correlation of the tan spot with agricultural practices and environmental factors. The disease infested 67% of the visited regions. The highest prevalence (87.5%), incidence (> 30%), and severity (> 10%) were observed in sub-humid regions, contrary to the middle semi-arid regions. Logistic regression was used to analyse the correlation of incidence and severity with various factors as independent variables. In a multiple variable model, the bioclimatic stages, variety, previous crop, humidity, and rainfall were significantly associated with tan spot incidence and severity. High incidence and severity were significantly correlated to the sub-humid regions, varieties Maâli, Razzak, Karim, and Carioca, rainfall, high level of humidity, and monoculture. The correlation between the tan spot and several environmental factors must be considered to ensure successful and sustainable disease management strategies.

Culture of Steinernema glaseri on three solid media and their virulence against Galleria mellonella larvaeOriginal Paper

Carlos I. Cortés-Martínez, Adriana Ines Rodríguez-Hernández, Ma del Rocío López-Cuellar, Norberto Chavarría-Hernández, Rodolfo De los Santos Romero

Plant Protect. Sci., 2023, 59(3):278-283 | DOI: 10.17221/1/2023-PPS

Steinernema glaseri is a potential biocontrol agent against white grubs of the Phyllophaga spp. complex; however, its suitability for in vitro multiplication has been scarcely investigated. In this study, the effects of the surface culture of NJ-43 strain with its symbiotic bacteria Xenorhabdus poinarii on egg-yolk agar (P2), chicken-liver agar and nutrient meat-peptone (MP) agar on infective juvenile (IJ) productivity and their virulence against Galleria mellonella larvae were investigated. The bacteria on the surface of the agar were first incubated in darkness at 30 °C for 54–102 h, and then 100 surface-sterilised IJs were added. After two harvests, the accumulated productivity was higher on chicken-liver agar (536 × 103 IJs/m2 day) and P2 agar (534 × 103 IJs/m2 day) than on nutrient MP agar (58 × 103 IJs/m2 day). The mean virulence of the in vitro produced IJs was 46–60% and showed no statistically significant difference among the three culture media. In conclusion, the maximum multiplication factor of S. glaseri NJ-43 on solid media was 385, and its original virulence was retained.

Index of reviewers 2023

Editorial Office

Agric. Econ. - Czech, 2024, 70(1):I-III

Gly-Leu instead of Gly promoted the proliferation and protein synthesis of chicken intestinal epithelial cellsOriginal Paper

Jing Liang, Baolong Du, Minyan Wan, Yapeng Zhao, Defu Tang

Czech J. Anim. Sci., 2023, 68(9):391-398 | DOI: 10.17221/213/2022-CJAS

Amino acids have positive regulatory effects on the function of intestinal epithelial cells (IEC), but in the field of animal nutrition, research on the regulatory effects of amino acids on IEC is still in the initial stages. This study aims to explore the effects of Gly, Gly-Gly, and Gly-Leu on IEC proliferation and their possible mechanisms. Chicken small intestinal epithelial cells were separated using the tissue block method, and other miscellaneous cells were removed for digestion and passage culture. The IEC were cultured in the medium containing 20 nmol/l Gly, Gly-Gly and Gly-Leu for 24 h, and the expression of enterokinase and cytokeratin in cells, the growth curve and activity of IEC, cell cycle, differentially expressed genes, mRNA expression, and protein expression levels of p-mTOR and p-S6K1 in IEC were detected. Enterokinase and cytokeratin were expressed specifically in IEC. The results of growth curve and MTT revealed that the cell viability of IEC was significantly increased after treatment with Gly, Gly-Gly and Gly-Leu. The cell cycle results showed that compared with the control group, Gly, Gly-Gly and Gly-Leu intervention could increase the proportion of IEC in G1 phase, and the proportion in S phase of IEC was decreased. Transcriptome sequencing showed that compared with the control group, there were 54, 28 and 30 differential genes in Gly group, Gly-Gly group and Gly-Leu group, respectively. These genes were mainly enriched in nitric oxide synthesis and protein kinase B signalling, PI3K signal and cellular amino acid biosynthesis and transport signal pathways. RT-PCR results showed that the mRNA expression levels of PCYT2, SPP1, EMC6, GRIA2 and PKD2 were consistent with the sequencing results. Western blot results showed that compared with the control group, the protein expression of p-mTOR and p-S6K1 in Gly group, Gly-Gly group and Gly-Leu group was significantly increased. Gly-Leu can promote the protein synthesis in IEC by activating protein synthesis of mTOR signalling pathway in chicken IEC.

Retrospective study using biosensor data of a milking Holstein cow with jejunal haemorrhage syndromeCase Report

S Ha, S Kang, M Jung, E Jeon, S Hwang, J Lee, J Kim, YC Bae, J Park, UH Kim

Vet Med - Czech, 2023, 68(9):375-383 | DOI: 10.17221/73/2023-VETMED

Jejunal haemorrhage syndrome (JHS) is a sporadic and fatal enterotoxaemic disease in dairy cows associated with acute development and poor prognosis despite treatment. A 5-year-old Holstein cow with no reported pregnancy, three calving numbers, and 303 days in milk presented with hypothermia, discomfort, and inappetence. Anaemia, dehydration, faeces with blood clots, and absence of rumen and bowel movements were observed. We identified the presence of neutrophilia, hyperglycaemia, hypoproteinaemia, azotaemia, hyperlactatemia, hypocalcaemia, hypermagnesemia, hypokalaemia, and hypochloraemia through blood analyses. Necropsy and histopathologic examination revealed a dilated bluish-purple jejunum, blood clots within the jejunum, neutrophil infiltration into the submucosa of the jejunum, and vascular necrosis. Retrospective examination revealed extraordinary patterns of rumination time, activity, rumen mobility, and rumen temperature using biosensors and decreased milk yield. The abnormalities in the affected cow were detected before recognition by farm workers. To the best of our knowledge, this is the first report to examine data from biosensors in a cow with JHS. Our findings suggest that using biometric data may help understand the development of JHS.

Effects of different habitats on Achnatherum inebrians (Hance) Keng ex Tzvelev (drunken horse grass) soil seed banks and aboveground vegetationOriginal Paper

Saimilakezi Taiwaikuli, Guili Jin, Shazhou An, Yiqing Dong, Peng Wei

Plant Soil Environ., 2023, 69(9):421-428 | DOI: 10.17221/191/2023-PSE

The soil seed bank, as a potential source of ground vegetation renewal, plays an important role in the natural recovery and succession of vegetation as well as in the construction of ecosystems. To clarify the characteristics of the soil seed bank of Achnatherum inebrians and its relationship with the aboveground vegetation, the soil seed bank density, species composition and aboveground vegetation of three different grassland types, namely, desert, steppe and meadow, were investigated by means of field survey sampling and indoor germination experiments. The results showed that the seed bank densities of the three habitats were ranked as desert (1 422.22 seeds/m2), steppe (2 077.78 seeds/m2) and meadow (3 722.22 seeds/m2). The numbers of species were 16, 11 and 17, respectively. With respect to the vertical allocation, the soil seed banks in each habitat were shallow, and the seeds were mainly concentrated in the soil surface layer (0–5 cm). The species richness of the soil seed banks in the three habitats was higher than that of the aboveground vegetation, but there were some differences in richness, evenness and dominance. The species richness and diversity of soil seed banks and aboveground vegetation in meadow habitats were higher than those in desert and steppe habitats, indicating that the soil seed banks and aboveground vegetation in meadow habitats had higher stability. There was a significant positive correlation between the density of temporary soil seed banks and the density of aboveground plant communities in grassland habitats. The results may provide some reference for the prevention and control of Achnatherum inebrians in the three habitats.

Genotypic and environmental variability and stability of seed yield, oil content and fatty acids in high-oleic and high-linoleic safflower (Carthamus tinctorius L.) lines and cultivarsOriginal Paper

Sabri Erbaº, Hasan Baydar, Halil Hatipoğlu, Hasan Koç, Metin Babaoğlu, Arzu Köse

Czech J. Genet. Plant Breed., 2024, 60(1):1-11 | DOI: 10.17221/113/2022-CJGPB

The present study was to determine the genotypic and environmental variability and stability in seed yield, oil content, oil yield, oleic and linoleic acid of 10 safflower lines derived from a cross of Dinçer 5-18-1 × Montola 2000 together with six cultivars under six environments at five locations. The effects of genotypes, environments and genotype × environment interactions were highly significant (P < 0.01) for seed yield and oil content. Averaged across all environments, the seed yield was lowest in the cultivar Olas (2 352 kg/ha), and highest in the line Bay-Er 5 (2 869 kg/ha). According to mean (xi) and regression coefficient (bi) values, the Bay-Er 16 was better adapted to unfavourable environmental conditions, whereas the Bay-Er 1, Bay-Er 5 and Bay-Er 14 were better adapted to favourable environmental conditions. The highest oil content across environments, over 35%, was recorded in the line Bay-Er 15 and the cultivars Olas and Linas. The best adaptability to the environments was observed in the cultivar Olas. The oleic acid content of genotypes increased and the linoleic acid contents decreased from the north to the south latitudes. The oil content of genotypes grown in Southeastern Anatolia was higher than in the other regions. Within the regions, seed yield and oil content was higher after autumn sowing than after spring sowing.

Gallbladder atrophy associated with pancreatitis: Clinical and advanced imaging diagnosis in a dogCase Report

D Han, DI Jung

Vet Med - Czech, 2023, 68(11):435-442 | DOI: 10.17221/76/2023-VETMED

Gallbladder atrophy (GBA) is characterised by a reduction in the size and volume of the gallbladder. In human medicine, it is well-established that GBA frequently occurs together with pathologies affecting the gallbladder and pancreas. However, to the best of our knowledge, there is currently a dearth of reported cases of GBA in dogs within the veterinary field. In this study, we present a case report of GBA in a 7-year-old Yorkshire Terrier. The diagnosis of GBA was confirmed using abdominal ultrasonography and advanced imaging techniques, including computed tomography, which were performed over a 4-year period. The patient initially presented with predominantly gastrointestinal symptoms, which were subsequently diagnosed and treated as pancreatitis. Concurrently, a gallbladder nodule and an anomalous structure suspected to be cholelithiasis were identified. However, during the 4-year follow-up, the gallbladder structure regressed, leaving only the presence of the gallbladder nodule. Notably, cholecystectomy was not performed, and apart from pancreatitis-related symptoms, the patient did not show any gallbladder-related problems throughout the spontaneous atrophic process. Based on these findings, we propose that the observed GBA was likely induced by cholecystitis associated with pancreatitis. This case underscores the significance of considering GBA as a potential diagnosis in canine patients presenting with pancreatitis and gastrointestinal symptoms. Furthermore, it highlights the value of comprehensive diagnostic imaging in accurately determining the underlying cause of these symptoms.

Trust evolution, institutional constraints, and land trusteeship decisions among Chinese farmersOriginal Paper

Qi Li, Menghui Gao

Agric. Econ. - Czech, 2023, 69(12):485-497 | DOI: 10.17221/232/2023-AGRICECON


Land trusteeship involves farmers entrusting the farming and managing of their land to trustees, who manage the land on their behalf in exchange for a commission fee. Land trusteeship has been an important approach to bridging the gap between smallholder farmers and modern agriculture in China. Because of the information asymmetry in land trusteeship, farmers have higher uncertainty and perceived risk, so social trust and institutional constraints are particularly important in promoting farmers’ participation in trusteeship. The objective of this study was to examine the impact of trust evolution and institutional constraints on smallholder farmers’ decision-making in green prevention and pest control trusteeship. Our research was conducted in Shandong, China, utilising factor analysis and binary regression. The results revealed that trusteeship decision-making combines trust governance and institutional governance, with significant roles played by institutional trust, institutional supervision, institutional regulation, and interpersonal trust. As part-time farming became more prevalent, the importance of institutional trust and institutional supervision increased, indicating a shift in trusteeship governance from social relations to institutional contracts and the maturation of land trusteeship models. In addition, we also tested the interaction effect of social trust and institutional constraints and the heterogeneity effect of different trusteeship contracts. To improve the land trust system, we must enhance farmers’ institutional trust and leverage the active role of intermediary supervision organisations such as village collectives.

Evaluation of five rootstocks on the growth, gas exchanges and chlorophyll fluorescence of Juglans regia L. cv. ‘Xiangling’Original Paper

Bing Hua Liu, Liang Cheng, Ji Xia Zhang, Lian Jia Yui, Hai Lin Ma, Fangchun Liu

Hort. Sci. (Prague), 2023, 50(3):208-218 | DOI: 10.17221/152/2022-HORTSCI

Our study comparative analyzed the morphological and physiological performance of Juglans regia L. cv. ‘Xiangling’ (JRX) grafted onto five rootstock species originated from China. A wide range of coefficient of variation (CV), 1.155–39.848%, was detected for fourteen indexes among the studied seedlings. CV of plant height, total dry biomass, total leaf area, root/shoot ratio, chlorophyll index, and stomatal conductance was higher than 15.00%, suggesting higher variation. Principal component analysis, hierarchical cluster analysis and subordinate function analysis were used to screen engrafted seedlings for their quality. All three methods produced the same result that seedling quality of ‘Xiangling’ engrafted with the five rootstock species from high to low were – Juglans regia L. cv. ‘Jizhaomian’ (JRJ), JRX, Juglans regia L. cv. ‘Lvxiang’ (JRL), Juglans mandshurica, Maxim., and Juglans hopeiensis Hu.. The evaluation results were highly consistent with the actual growth performance of the engrafted seedlings, it verified the reliability of our results and the evaluation methods. The results demonstrated that JRJ, JRX, and JRL are potential rootstock candidates in the studied walnut planting regions. It would provide important implication for the selection of proper rootstock species for a certain particular walnut variety.

Influence of growth biostimulators used for the production of vine planting materialOriginal Paper

Svetlana Stoyanova, Iliyana Petrova, Galina Dyakova, Ralitsa Mincheva

Hort. Sci. (Prague), 2023, 50(3):233-240 | DOI: 10.17221/143/2022-HORTSCI

Growth biostimulators activate some physiological processes that increase the efficiency of the usage of nourishing substances, stimulate the development of plants and allow reduced fertiliser consummation. Most biostimulators are capable of reacting against the effect of biotic and antibiotic stresses as they increase the crop production of the cultures and represent an opportunity of growing quality and healthy food. The article affects the results of the influence of RadiCifo L24 and Euroradix over the growth and development of grafted cuttings in vine rootings. The study was carried out through the dessert seedlees grapevine variety ‘Zornitsa’ grafted over the Berlandieri × Riparia (SO4) pad. Before rooting, paraffin is applied to 2/3 of the stratified grafted cutting’s length and is then immersed in a 2% solution of RadiCifo L24 (for 20 minutes) and Euroradix (for 5 minutes), after that the cuttings are rooted to 15-17 cm in depth (to the non-paraffined part). According to the biometrics rating (number of developed shoots, number of roots), the variant with the growth stimulator RadiCifo L24 seems to be a more effective method for the production of first-class vines of the ‘Zornitsa’ variety, thus it can be recommended for the production of vine planting material.

Mathematical modeling of drying parameters of moringa oleifera leaves in a cabinet dryeOriginal Paper

Timothy Adekanye, Abiodun Okunola, Olumuyiwa Moses, Endurance Idahosa, Yisa Boye, Aminu Saleh

Res. Agr. Eng., 2023, 69(4):159-166 | DOI: 10.17221/72/2022-RAE


This study focused on drying moringa leaves using a cabinet dryer. The impact of the 40, 50, and 60 °C drying air temperatures on the moisture content of the leaves at a constant air velocity with variation in weight (40, 80, and 120 g) was considered. Ten drying models were fitted to the drying data to describe the drying parameters of moringa leaves. The best model was chosen based on the highest coefficient of determination (R2), and the lowest sum of square error (SSE) and root mean square error (RMSE) values. The Henderson and Pabis model best described the drying characteristics of the moringa leaves having the highest R2 (0.9888) and lowest SSE (0.0401) and RMSE (0.0604). The effective moisture diffusivity increased with the temperatures ranging from 8.72 × 10–9 to 1.40 × 10–8 m2·s–1. The activation energy ranged from 90.4636, 40.4884, and 22.7466 KJ·mol–1 for 40, 80, and 120 g, respectively.

Development and evaluation of an electromagnetic device to improve the physiological properties of some crop seedsOriginal Paper

Ahmed Shawky El-Sayed

Res. Agr. Eng., 2023, 69(4):167-178 | DOI: 10.17221/108/2022-RAE

This research aims to develop an eco-friendly technique for treating seeds before sowing and improving their physiological features. The developed technique depends on utilizing synchronized electro-magnetization and microwave radiation. An electromagnetic device was evaluated to provide multiple treatment ranges. The treatments are regulated electronically according to the seeds' physiological properties and storage duration. The device was designed to accommodate small and medium seeds for a variety of strategic crops, including wheat, barley, etc. Three different treated wheat varieties were tested and compared to the control. Also, eight different levels of synchronized electro-magnetization and microwave radiation were tested. The treated wheat seeds' vegetative properties, such as germination percentage, germination rate index, germination speed coefficient, and vigour indexes, were highly significant compared to the control. The treated wheat seeds' physiological properties were highly significant. The device productivity ranged from 0.023 to 0.059 Mg·h–1 with minimum energy consumption rates of 0.396 to 0.018 kWh·Mg–1, while the operating costs decreased to 11.53–44.13 USD·Mg–1.

Influence of pre-harvest calcium spray on fruit quality of apple cultivars during cold storageOriginal Paper

Boris Rilak, Ivan Gli¹iæ, Milan Lukiæ, Tomo Milo¹eviæ, Jelena Tomiæ, Mira Milinkoviæ

Hort. Sci. (Prague), 2023, 50(4):262-274 | DOI: 10.17221/127/2022-HORTSCI

Effect of pre-harvest calcium chloride (CaCl2) treatment on fruit quality attributes of three apple cultivars (‘Golden Delicious Reinders®’, ‘Granny Smith’ and ‘Red Chief’) at harvest and after two and four months of cold storage during two consecutive years was studied. Trees were sprayed four times starting from the beginning of June at 20-day intervals. After harvest, fruits were stored in a regular atmosphere (RA) for further analysis. Measurements included fruit weight, weight loss, firmness, total soluble solids (TSS), titrable acidity (TA), total sugars (TS), TS/TA, total phenolic content (TPC) and antioxidant activity (AA). CaCl2 had a positive impact on fruit firmness of all cultivars in both years. Higher values of TSS and TS of ‘Golden Delicious Reinders®’ were determined in CaCl2 treatment in both years. TSS, TS and TS/TA were increased by prolonging storage in ‘Red Chief’ in CaCl2 treatment and control, in both years. TSS and TS proved similarly stable in ‘Granny Smith’ during storage in CaCl2 treatment and control in the second year of examination, but a decrease of TA and TS/TA has been detected in both years of storage. The AA of cultivars ‘Golden Delicious Reinders®’ and ‘Red Chief’ was stronger affected by the storage compared to CaCl2 treatment. Through a comprehensive analysis of apple cultivars it can be concluded that pre-harvest application of CaCl2 in cultivars ‘Golden Delicious Reinders®’ and ‘Red Chief’ can be used to improve fruit quality during storage.

Potential of Morus nigra in Central Europe focused on micropropagation: A short reviewReview

Pavel ©vagr, Josef Gallo, Jan Vítámvás, Vilém Podrázský, Martin Balá¹

J. For. Sci., 2023, 69(11):463-469 | DOI: 10.17221/73/2023-JFS

This paper is focused on the description of the black mulberry (Morus nigra), its ecology and the possibilities of its in vitro propagation for quick and efficient obtaining of a large quantity of clones in a relatively short time for subsequent planting or sale. Due to ongoing climate change, it is considerable to use mulberry trees in horticulture, agroforestry and forestry under the conditions of Central Europe. The use of the mulberry is conditioned by the availability of planting stock. A proven and successful method of mulberry propagation is in vitro cultivation. Based on literature review, the recommended composition of planting media and other procedures for in vitro cultivation of mulberries are presented. The aim of the article is to inform foresters about the possibilities of using the black mulberry tree in our conditions and, using its example, to point out the possibility of using non-standard species of trees both as part of adaptation measures to the expected climate change and as one of the options for increasing the biodiversity of the landscape.

Lipid-rich bovine serum albumin is beneficial for the early development of bovine embryos, but induces lipid droplet formation in the blastocystOriginal Paper

Dae-Jin Kwon, Kyung-Do Park, HakKyo Lee, Jae-Don Oh

Czech J. Anim. Sci., 2023, 68(11):443-450 | DOI: 10.17221/107/2023-CJAS

Lipid-rich bovine serum albumin (LR-BSA) has been reported to increase the survival rate of blastocysts after freezing and thawing. However studies on the early development of in vitro fertilised (IVF) embryos are still insufficient in cattle. This study investigated the blastocyst productivity of in vitro culture (IVC) medium (synthetic oviductal fluid medium with amino acids, mSOFaa) supplemented with 5% fetal bovine serum (FBS, Control) or LR-BSA (1, 2.5, 5 mg/ml dosages, respectively) and the qualitative characteristics of produced blastocysts. Cleavage rates on day 2 were similar between all groups. Significant differences were obtained in the blastocyst rate in the 2.5LR-BSA group compared with the control (23.5% vs 35.7%, < 0.05). Hatching rates were significantly higher in all treatment groups than in control (< 0.05). The cell number in blastocysts did not differ among groups, but the apoptotic index in the 5.0LR-BSA group was higher than the control (< 0.05). The expression of embryo quality-related markers was affected. Octamer-binding transcription factor 4 (Oct4), placenta associated 8 (Plac8), and sex-determining region Y-box 2 (Sox2) genes expression in the 2.5LR-BSA group were significantly up-regulated compared to the control (< 0.05). Cytoplasmic lipid contents and the lipid droplet formation-related gene, sterol regulatory element binding transcription factor 1 (Srebf1), were significantly increased in the 5.0LR-BSA group (< 0.05). Therefore, the LR-BSA supplementation (2.5 mg/ml) to mSOFaa medium could contribute to the early development of bovine IVF embryos and the qualitative improvement of the resulting blastocysts.

Effects of exogenous ascorbic acid on photosynthesis and xanthophyll cycle in alfalfa (Medicago sativa L.) under drought and heat stressOriginal Paper

Yaqian Zong, Chao Xu, Kai Zhou, Xinhui Duan, Bo Han, Chenggang He, Hua Jiang

Plant Soil Environ., 2023, 69(11):487-499 | DOI: 10.17221/330/2023-PSE

Alfalfa is an important leguminous plant, yield and quality depend on the growing environment, while effects of drought and heat stress on alfalfa leaves are unknown. This study was conducted to evaluate the effect of exogenous ascorbic acid (AsA) on photosynthesis, chlorophyll fluorescence, and xanthophyll cycle in alfalfa leaves subject to under drought and heat stress. The results suggest that drought and heat stress caused decreases in the net photosynthetic rate (Pn) in alfalfa leaves, but stomatal conductance (gs), transpiration rate (Tr), and intercellular CO2 concentration (ci) were increased. The application of AsA could alleviate these changes to some extent. Besides, the decreased photosystem II (PSII) maximum photochemical efficiency (Fv/Fm) and violaxanthin (V) contents and significantly increased non-photochemical quenching (NPQ) levels. The increased NPQ corresponds to the de-epoxidation state (DPS) of xanthophyll pigments. In the AsA-pretreated alfalfa plants, the Fv/Fm and the NPQ were elevated, indicating that AsA could alleviate the adverse effects on photosynthesis induced by this stress. The violaxanthin de-epoxidase (VDE) enzyme activity was inhibited by drought and heat stress, and AsA significantly increased VDE enzymatic activity on the 2nd and 8th days. In summary, photoinhibition of PSII occurred in alfalfa leaves under drought and heat stress, resulting in decreased photosynthetic activity. Exogenous AsA can enhance the photosynthetic capacity of the plant, and enhance the drought and heat resistance of alfalfa.

Polymorphism of the PGLYRP1 gene, the value of selected performance and functional traits, and causes of culling in Holstein-Friesian red-white cowsOriginal Paper

Piotr Sablik, Andrzej Dybus, Ewa Janu¶, B³a¿ej Nowak, Wojciech Kruszyñski, Anna Mucha

Czech J. Anim. Sci., 2023, 68(10):399-406 | DOI: 10.17221/194/2022-CJAS

This research paper addresses the hypothesis that the peptidoglycan recognition protein 1 (PGLYRP1) gene polymorphism (Tyr76His; dbSNP ID: ss104796364) has an influence on some performance traits and causes of culling in Polish Holstein-Friesian red-white cows. The study involved 134 cows kept on a farm in the south-west of Poland. PGLYRP1 genotypes TT, CT, and CC were detected. It was shown that compared with cows with genotypes CT and TT, the individuals with genotype CC were characterised by higher lifetime yields and higher amounts of lactation milk, fat, and protein. A beneficial effect of genotype CC, compared with genotype TT, was also noted in the case of the lifespan and, consequently, the length of the productive life and the average number of lactations. Diseases of the musculoskeletal system (genotypes CC and TT) and disorders of the reproductive system (genotype CT) were the most common causes of culling. An essential practical observation was the potentially higher susceptibility of cows with genotype CC to mastitis, which resulted in the necessity to cull over one-fifth of the animals in this group. Simultaneously, no cows in this group were culled due to low performance or metabolic, gastrointestinal, and respiratory diseases. Therefore, the PGLYRP1 gene seems to be a promising potential herd health marker; however, to consider it the main gene, it is necessary to extend the investigations to include more individuals and other breeds of dairy cattle.

Canine multiple primary tumours: Mammary tubular carcinoma, uterine leiomyosarcoma, and facial sebaceous epitheliomaCase Report

Kim SH, Baek YB, SI Park

Vet Med - Czech, 2024, 69(3):94-98 | DOI: 10.17221/103/2023-VETMED


Multiple primary malignant tumours (MPMTs) are multiple neoplasms with independent pathogenetic origins, placing great importance on the tumorigenesis and clinical treatment. However, due to the rare occurrence and diagnostic confusion, MPMTs have rarely been investigated in veterinary medicine. In this report, a 10-year-old intact female Maltese dog had MPMTs, consisting of two malignant tumours and one benign tumour each derived from a topographically different site: tubular carcinoma in the mammary glands, leiomyosarcoma in the uterus and sebaceous epithelioma in the cheek. The unique combination of MPMTs would be the first case in veterinary research to give insight into the diagnosis, disease characteristics, and surgical treatment.

Chemical relationships in earthworm casts of two urban green spaces indicate the earthworm contribution to urban nutrient cyclesOriginal Paper

Madalina Iordache, Iacob Borza, Valentina Andriucã

Soil & Water Res., 2023, 18(4):219-226 | DOI: 10.17221/26/2023-SWR

Due to the earthworms’ implications in nutrient cycles through their burrowing and casting activity, earthworms are worth considering when urban biogeochemical cycles are analysed. Several chemical parameters and their relationships were analysed in earthworm casts of two urban parks, namely the pH, total organic carbon (TOC), total nitrogen (Nt), plant available phosphorus (P), plant available potassium (K), and calcium water soluble (Ca). It was statistically significantly found that the TOC, Nt, P and K are reciprocally determined in the earthworm casts: 74.4% of the pH variability is co-determined by the N, P, K, TOC, and Ca contents; 95.9% of the Nt variability is co-determined by the pH, P, K, TOC, and Ca contents; 95.4% of the P variability is co-determined by the pH, N, K, TOC, and Ca contents; 94.5% of the K variability is co-determined by the pH, N, P, TOC, and Ca contents; 86.6% of the TOC variability is co-determined by the pH, N, P, K, and Ca contents. This study revealed the complexity of the chemical relationships inside earthworm casts, their reciprocal dependencies, and highlighted the complexity of the earthworms’ contribution to biogeochemical cycles in urban areas. Our findings propose earthworms as indicators of the integrative conservation management of urban ecosystems.

Implications of surfactant application on soil hydrology, macronutrients, and organic carbon fractions: An integrative field studyOriginal Paper

Cansu Almaz, Recep Serdar Kara, Markéta Miháliková*, Svatopluk Matula

Soil & Water Res., 2023, 18(4):269-280 | DOI: 10.17221/88/2023-SWR

This study investigates the effects of repeated applications of the non-ionic soil surfactant H2Flo (ICL-SF Inc., Israel) on the soil water content, hydraulic conductivity, nutrient distribution, and organic carbon fractions (OCFs) in non-hydrophobic loamy sand soils under subsurface drip irrigation. Our results indicate that H2Flo treatment reduces both saturated and unsaturated hydraulic conductivity while promoting the uniform irrigation distribution, consistent with previous findings on surfactants’ effects on sandy soils. An increase in soil pH levels, organic carbon content, and extractable magnesium, calcium, and potassium was observed in treated soils, with elevated levels of potassium permanganate oxidizable organic carbon (POXC) implying accelerated decomposition rates. Notably, a positive linear relationship was found between POXC and the increased NO3-N content of treated soils, suggesting induced conditions of nitrification. However, the carbon fractions water-soluble organic carbon (Cws) and hot water-soluble organic carbon (Chws) remained quantitatively unchanged, even though they exhibited a positive linear relationship with the soil’s hydraulic conductivity. The study highlights the crucial role of monitoring changes in OCFs and nutrient dynamics after surfactant application to optimize soil organic matter utilization and chemical fertilizer management.

Ultra-high-pressure technology for preservation of fresh aquatic foods: A reviewReview

Jiakun Peng, Chune Liu, Kaikai Bai, Shaohua Xing, Feng Liu

Czech J. Food Sci., 2023, 41(5):313-322 | DOI: 10.17221/87/2023-CJFS


Aquatic foods such as fish, shrimp, and shellfish are important human nutrient sources. However, aquatic foods spoil quickly during processing and storage due to spoilage bacteria and endogenous enzymes. Ultra-high-pressure (UHP) technology, as an advanced non-thermal treatment method, is an effective preservation technique for aquatic foods. The mechanism of UHP technology is to destroy non-covalent bonds by UHP, which leads to the change of cell membrane permeability and the destruction of high-level structure of proteins, making apoptosis and enzyme inactivation. The technology can effectively sterilise and preserve food's colour, taste and nutritional value. The paper provides an introduction to the working principles, types, sources and equipment and describes the progress of the research and application of UHP technology in pascalisation, enzyme inactivation, parasite inactivation and quality modification of aquatic products. Potential limitations and prospects of the technology are also outlined. We hope to lay the theoretical groundwork for using this technique in aquatic product processing and provide guidance for its application in industrial production.

Refined approach to the evaluation of heat resistance applied to Enterobacteriaceae in cheese stretchingOriginal Paper

Irena Nìmeèková*, ©árka Tre¹lová, Eli¹ka Le¹ková

Czech J. Food Sci., 2023, 41(5):358-366 | DOI: 10.17221/83/2023-CJFS


Heat resistance of bacteria is a factor potentially limiting the production of safety foods. We focused on five Enterobacteriaceae strains related to cheese stretching and sub-pasteurisation experimental temperatures of 50–59 °C. Heat resistance was screened and obtained data were fitted to a classical log-linear model with D-values indicating highly heat-resistant strains used. For example in Klebsiella oxytoca S525, D(50)-value was 96.1 min and D(59)-value 5.1 min. In subsequent detailed measurements, the shape of inactivation curves was sigmoid with defined lag, log-linear and stationary phase. We suggest calculating refined D-values (Dr-values) using only data obtained in log-linear phases, namely Dr(temperature; lag phase). In K. oxytoca S525, the obtained results were: Dr(50; 80.9) = 61.7 min, Dr(53; 12.4) = 36.8 min, Dr(56; < 10) = 10.6 min, and Dr(59; < 3) = 4.3 min. The research of particular inactivation phases can provide interesting findings both in science and industrial practice, especially concerning the passage or persistence of hazardous strains in food processing plants.

Physical, mechanical, and antioxidant properties of alginate/pectin edible films with incorporated chokeberry and wild thyme extractsOriginal Paper

Svetla Maksimova Dyankova*, Ayten Osman Solak

Czech J. Food Sci., 2023, 41(5):367-374 | DOI: 10.17221/94/2023-CJFS


The purpose of the present study was to develop edible composite films based on sodium alginate and pectin with incorporated Aronia melanocarpa (Michx.) Elliot and Thymus serpyllum L. extracts. The influence of the extracts on the physicochemical, optical, mechanical, and antioxidant properties of the films was investigated. The addition of the extracts changed the colour parameters and significantly increased the barrier properties to UV and visible light. This effect is more pronounced in the film with chokeberry extract and is due to the anthocyanins contained in it (75.43 μg cyd eq·g–1, cyd eq – cyanidin equivalents). The antioxidant activity of films with incorporated extracts was 4-fold (thyme) to 7-fold (chokeberry) higher than the control alginate/pectin film. A significant improvement in the mechanical characteristics of the films with extracts was found. The values for tensile strength were 9.41 MPa (chokeberry) and 9.54 MPa (thyme), while for the film without extract – 4.63 MPa. The resulting films could find potential application as active packaging with antioxidant properties, which could increase the quality and extend the shelf life of the foods packaged in them.

The effect of different cooking methods on the antioxidant activity of wild Swiss chard (Beta vulgaris L. var. cicla)Original Paper

Yagmur Demirel Ozbek*, Ozlem Saral

Czech J. Food Sci., 2023, 41(5):375-381 | DOI: 10.17221/114/2023-CJFS


This study aimed to investigate the effects of different cooking methods (boiling for 5 min and 8 min, microwave cooking for 3.5 min and 6.5 min, and stir-fry for 5 min and 10 min) on wild chard's antioxidant activity and total phenolic content. It was determined that the total phenolic content [1 552.00 ± 299.82 mg GAE·(100 g)–1, GAE – gallic acid equivalents] increased in 3.5 min in the microwave [2 611.33 ± 311.76 mg GAE·(100 g)–1] and 5 min in stir-frying [2 434.33 ± 197.75 mg GAE·(100 g)–1] compared to the raw chard samples (P < 0.05). Two different antioxidant activity determination methods [2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity and ferric reducing antioxidant power (FRAP)] were used in the study. In both methods, it was determined that antioxidant activity decreased in the 10-min application of stir-frying. In contrast, the antioxidant activity increased by applying 3.5 min and 6.5 min in the microwave (P < 0.05). As a result, it was found that the antioxidant activity and total phenol content of wild chard changed when the cooking method and time were changed.

Forest as a source of renewable material to reduce the environmental impact of buildingsOriginal Paper

Hana Svobodová, Petra Hlaváèková

J. For. Sci., 2023, 69(10):451-462 | DOI: 10.17221/65/2023-JFS


Construction sector has high environmental impact throughout entire life cycle of buildings. One way to reduce the impact is to use building materials with the lowest possible environmental impact – such as wood. The use of wood-based building materials can improve the overall environmental balance of buildings. Compared to other materials, wood probably has the best environmental performance. These findings are particularly significant in the context of the environmental and legislative situation in Europe and the Czech Republic and may be one of the reasons for the increasing number of new wood-based buildings. The main reason for the research is to highlight the potential of wood as an ecological renewable material with multiple applications in all sectors of the national economy, especially in the construction industry. This paper aims to deepen the knowledge of the environmental specifications of building materials, especially wood, highlight its benefits and verify that building with natural and eco-friendly materials is less costly with lower environmental impacts. To illustrate the environmental impact of the construction industry, a case study comparing house variants was conducted to find the most suitable combinations of materials in terms of economic, environmental, and social aspects. It was found that from a sustainable development perspective, building with green materials generally means lower environmental impacts measured by e.g. global warming potential and embodied energy. This is particularly evident in the case of wood, which is not only a renewable material with advantageous thermo-technical and construction properties despite its low weight, but also stores carbon as it grows. The findings show that wood in the structure can reduce the cumulative environmental impact of the whole structure.

The importance of agriculture and rural areas for the future in the European Union: An exploration of public opinionOriginal Paper

Mercedes Rodríguez, José Antonio Camacho

Agric. Econ. - Czech, 2023, 69(10):394-403 | DOI: 10.17221/115/2023-AGRICECON


The last years have seen a momentous transformation in Common Agricultural Policy (CAP). The focus of interventions has shifted from production toward rural development but recognising the role of farmers. Although the attitudes of farmers to CAP have long been previously studied, little attention has been focused on the views of citizens. Using data from the ‘Special Eurobarometer 520: Europeans, Agriculture and the CAP’, we sought to provide a clearer understanding of citizens’ opinions about the future of agriculture and rural areas in the European Union. In particular, we assessed rural-urban differences and examined disparities across countries, paying attention to the importance of rural development in the planned expenditure under CAP 2023–2027. The results showed that the perceived importance is higher for respondents living in rural areas and that there are disparities across countries. From a policy perspective, targeted efforts should be made in each country to address the specific challenges each country faces.


Impacts of the war on prices of Ukrainian wheatOriginal Paper

Lenka Novotná, Zuzana Rowland, Svatopluk Janek

Agric. Econ. - Czech, 2023, 69(10):404-415 | DOI: 10.17221/121/2023-AGRICECON


The Russian-Ukrainian armed conflict significantly affected wheat production and its export from Ukraine, mainly during the war outbreak. Since both countries rank among the major global wheat producers, the warfare disrupted wheat supplies, hastily pushing the prices. Based on the analysed data, we carried out research using multilayer perceptron networks. The findings suggest the biggest price increase between February and March 2022, witnessing wheat prices at about 1 400 USD per t. We predict a decline to the pre-war values until the end of 2025, estimating its rates between 600 USD and 800 USD per t. This price slump may involve signing an agreement on unblocking Ukrainian seaports, which would restore wheat exports. Yet, our survey is confined to historical data, which do not suggest any dramatic event that would alarmingly sway wheat prices.


Exploring within- and between-effects of the factors influencing off-farm work decisions in SwitzerlandOriginal Paper

Dierk Schmid, Swetlana Renner, Daniel Hoop

Agric. Econ. - Czech, 2023, 69(10):416-425 | DOI: 10.17221/233/2023-AGRICECON


We examine the determinants of off-farm work in Swiss agriculture between 2003 and 2013. By differentiating between the between-farm effects and the within-farm effects, our model provides new insights into the labour allocation process as compared with standard cross-sectional or panel data models. As regards the between-farm variations, our results show that younger farm families without children and farm households with higher non-agricultural education levels of both the farmer and the partner are more involved in working activities outside the farm. However, the within-farm time effects provided a more differentiated picture: impacts of changes in most variables over time tended to be smaller, and in case of two variables show opposite directions. In addition to a negative between-effect of farm income on the allocation of off-farm labour, our results on within-farm effects suggest that an increase in farm income per annual family work unit could be compatible with a higher share of off-farm work during the analysed period.

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