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Results 2251 to 2280 of 5716:

Prediction of saturated hydraulic conductivity Ks of agricultural soil using pedotransfer functionsOriginal Paper

Kamila Bá»ková, Svatopluk Matula, Markéta Miháliková, Eva Hrúzová, David Kwesi Abebrese, Recep Serdar Kara, Cansu Almaz

Soil & Water Res., 2023, 18(1):25-32 | DOI: 10.17221/130/2022-SWR

The determination of the saturated hydraulic conductivity Ks on a field scale presents a challenge in which several variables have to be considered. As there is no benchmark or reference method for the Ks determination, the suitability of each available method has to be evaluated. This study is aimed at the functional evaluation of three publicly available types of pedotransfer functions (PTFs) with different levels of utilised predictors. In total, ten PTF models were applied to the 56 data sets including the measured Ks value and the required predictors (% sand, silt and clay particles, dry bulk density, and organic matter/organic carbon content). A single agricultural field with a relatively homogenous particle size distribution was selected for the study to evaluate the ability of the PTF to reflect the variability of Ks. The correlation coefficient, coefficient of determination, mean error, and root mean square error were determined to evaluate the Ks prediction quality. The results showed a high variability in Ks within the field; the measured Ks values ranged between 10 and 1261 cm/day. Although the tested PTF models are based on a robust background of soil databases, they could not provide estimates with satisfactory accuracy unless local soil data were incorporated into the PTF development.

Current nutritional guidelines in terms of the effect on gut microbiota and human health considering the WHO and FAO recommendationsReview

Barbora Rù¾ièková, Pavel Kohout

Czech J. Food Sci., 2023, 41(1):1-7 | DOI: 10.17221/186/2022-CJFS

The purpose of this paper is to evaluate current nutritional guidelines of modern diets based on medical and nutrition facts and their effect on gut microbiota and health, considering current recommendations of world authorities such as FAO and WHO. For this purpose, the first part is devoted to the impact of microbiota on human health, and special attention is committed to the effect of fibre on gut microbiota. The second part is dedicated to the fundamental division of diets and the evaluation of concrete nutritional guidelines of modern diets into microbiota and health, followed by the recommendations of global authorities. Modern diets include diets from the point of view of medical science (e.g. Mediterranean), promoted by nutritionists and authorities (e.g. Nordic) and by social trends (e.g. vegan). The evaluation summarises that high-fibre diets have tremendous benefits on human health. Diets with fresh, local and naturally fermented food positively impact the gut microbiota, hence human health (agrarian diets). The results of the review show that the nutritional guidelines associated with the lowest mortality are the Mediterranean with the Atlantic or Nordic diet, which is in line with the recommendation of the world authorities (FAO, WHO, UN). The low-fibre western diet with highly processed foods with no or very low levels of live bacteria appears to be high-risk in terms of preventing civilisation diseases with a negative impact on gut microbiota, which is in line with current FAO and WHO guidelines.

Serum biochemical reference interval determination in wild Siberian weasel (Mustela sibirica)Original Paper

M Ha, YD Suh, S Ahmed, DN Lee, JH Han, YK Kim, SC Yeon

Vet Med - Czech, 2023, 68(3):122-128 | DOI: 10.17221/102/2022-VETMED

Determining reference intervals (RI) is a valuable asset for assessing the health of wildlife species. This is the first study to establish serum biochemical RIs in Siberian weasels. Forty-two healthy free-ranging Siberian weasels were captured live and brought to Seoul Wildlife Center between June 2021 and August 2022. Blood samples from 42 healthy Siberian weasels of both sexes were used to calculate RIs. An automated analyser was used to perform serum biochemistry profiles. The American Society for Veterinary Clinical Pathology recommendations were used to calculate a nonparametric RI with 90% confidence intervals. The RIs of albumin, total protein, globulin, calcium, glucose, blood urea nitrogen, phosphorus, amylase, cholesterol, alanine aminotransferase, total bilirubin, alkaline phosphatase, creatinine, and creatine kinase were determined. The RIs established in this study will serve as a good starting point for analysing serum biochemical data in Siberian weasels.

Effect of ultrasound on isolation and properties of oat starchOriginal Paper

Esra Baºarıcı Ünlü, Çiğdem Aykaç*

Czech J. Food Sci., 2023, 41(2):111-117 | DOI: 10.17221/94/2022-CJFS

The aim of the present study was to analyse the effect of ultrasound (US) on the isolation and properties of oat starch. Starch isolation was done by a water extraction method and with sonication for 30 (US30), 45 (US45) and 60 (US60) min. The highest starch yield was found in US45 as 49.04 g·100 g–1 of oat flour when the extraction time decreased from 6 h to 45 min. The functional properties of starches, such as bulk density, water solubility index, dispersibility and water absorption capacity, ranged from 0.65 to 0.80 g·mL–1, 3.22 to 5.75%, 78 to 87.5% and 84.23 to 95.87%, respectively. US45 had lower bulk density and higher dispersibility than other starches. US treatments decreased the gelatinisation temperature ranges and increased the gelatinisation enthalpy values. The enthalpy of the gelatinisation value of oat starch was found as 8.45 J·g–1 and increased with sonication up to 13.65 J·g–1. Retrogradation endotherms were observed after 6 days of storage, and enthalpies of retrogradation were lower than in the gelatinised starches. Fourier transform infrared spectroscopy (FTIR) spectra showed that US treatment did not affect the functional groups of oat starch. US application during oat starch isolation gave desired results, such as time reduction, higher yields and increased functional properties.

Molecular diagnosis of red rot of sugarcane in Pakistan and in vitro control of isolated pathogen using rhizobacteriaOriginal Paper

Zimen Ahmad, Muhammad Asad Farooq, Amama Fatima, Syeda Gul Nisa, Sania Tabassum, Bushra Ismat, Sundus Waseem, Umer Iqbal, Asma Akbar, Urooj Haroon, Hassan Javed Chaudhary, Tauseef Tabassum, Ahmed Z Dewidar, Abdullah Alaklabi, Muhammad Farooq Hussain Munis

Plant Protect. Sci., 2023, 59(2):124-133 | DOI: 10.17221/45/2022-PPS

Sugarcane (Saccharum officinarum L.) is a key cash crop, and its production is influenced by a variety of phytopathogens in different parts of the world. During consecutive field surveys, sugarcane stalks with red rot symptoms were observed in three provinces of Pakistan (Punjab, Sindh, and Khyber Pakhtunkhwa). Cane samples with visible symptoms were plated on Potato Dextrose Agar (PDA) media. Morphological and microscopic observations identified this pathogen as Colletotrichum falcatum. Comparative molecular study of amplified sequences of β-tubulin (Bt) and Actin (ACT) genes showed 100% similarity and ITS sequence showed 99% similarity with C. falcatum. For in vitro control of red rot, eight bacterial strains from the rhizosphere of sugarcane were isolated. These strains showed variable growth inhibition of C. falcatum in dual culture method. Among all tested strains, Bacillus amyloliquefaciens and B. altitudinis exhibited best antifungal activities. Based on these results, tested bacterial strains (B. amyloliquefaciens and B. altitudinis) can be recommended as effective biocontrol agents to manage red rot disease of sugarcane.

Effect of biochar or biochar and urea supplementation on feed intake, milk yield, feed conversion and methane production of dairy cowsOriginal Paper

Georg Terler, Manuel Winter, Michael Mandl, Joseph Sweeney, Andreas Steinwidder

Czech J. Anim. Sci., 2023, 68(6):245-254 | DOI: 10.17221/38/2023-CJAS


Feed additives belong to a number of climate change mitigation strategies being sought to reduce methane emissions in ruminants. In this study, the effect of biochar or biochar and urea supplementation on dairy cow performance and methane production was assessed. Eighteen cows were used in a 3 × 3 latin square design with three feeding groups: control with no supplementation (CO), biochar supplementation (BC, 200 g/day) and biochar and urea supplementation (BC + U, 200 g/day biochar and 90 g/day urea). All cows were fed a forage mixture ad libitum and 5 kg of concentrates per day on average. Methane emissions were measured in respiration chambers. Biochar as well as biochar and urea supplementation did not affect total dry matter, energy and utilisable protein intake. However, lignin intake was higher in the BC group and crude protein intake was higher in the BC + U group compared to the CO group. Supplementation of feed additives did not affect milk production and milk composition, except for the higher milk urea content in the BC + U group. Feed conversion, diet digestibility and methane production were not affected by feeding strategy. In conclusion, biochar supplementation does not reduce methane emissions, but it does not negatively affect dairy cow performance.

Human potential of talents in agriculture and forestry in context of Agriculture 4.0Original Paper

Milo¹ Hitka, Lenka Li¾betinová

Agric. Econ. - Czech, 2023, 69(6):223-233 | DOI: 10.17221/153/2023-AGRICECON


Agriculture 4.0 creates a challenge for agricultural and forest enterprises in the form of changes in the processes and strategies set up to now. The ability for flexibility, personal development, and further education will be critical in transforming agriculture and forestry organisations. The transition to Agriculture 4.0 will also affect the need for human resource management in terms of their need and competence structure. This work aims to identify a group of employees in the environment of the Slovak Republic’s agricultural and forest enterprises with the prerequisites to acquire additional work competencies and the interest to develop flexibly. The mentioned group of employees, understood as progressive, will be examined from the point of view of motivational preferences and the level of satisfaction with them. The presented outputs follow searching the sample unit of 2 193 employees in agriculture and forestry organisations. Based on inferential statistics, it was confirmed that the progressive group of employees is identifiable in terms of their education and, compared to other groups, has a significantly higher perception of the importance of motivation factors with the highest difference in the case of factors related to career aspiration and social needs.

Selection of drying technology based on dynamic effects on physicochemical properties and flavours of mulberryOriginal Paper

Baolin Han, Shulin Tian, Rong Fan, Rangfang Chen, Yu Wang, Hucheng Gong, Minghong Bian

Czech J. Food Sci., 2023, 41(4):295-303 | DOI: 10.17221/82/2023-CJFS


Mulberry is gaining attention for its potential health benefits. However, post-harvest deterioration of quality necessitates drying to prolong storage. This study aimed to investigate the effects of natural drying (ND), hot air drying (HAD), and vacuum freeze drying (VFD) on bioactive compounds and volatile organic compounds of fresh mulberries. The results showed that VFD had the highest retention of total phenols (5 553.87 ± 744.97 µg GAE·g–1), total flavonoids (3 575.51 ± 465.98 µg rutin·g–1), and total anthocyanins (64.98 ± 13.15 µg C3C·g–1) after prolonged drying. Additionally, flavour was identified as the most important indicator influencing consumer preference for dried mulberries, and VFD was found to be effective in retaining the natural flavours of mulberries. Although thermal treatment leads to a significant loss of organic compounds, HAD showed good retention of active substances and lower energy consumption in a shorter processing time.

Plasma bile acids in healthy green iguanas and iguanas with chronic liver diseasesOriginal Paper

Z Knotek, Z Knotkova, E Cermakova, GM Dorrestein, KO Heckers, D Komenda

Vet Med - Czech, 2023, 68(9):368-374 | DOI: 10.17221/10/2023-VETMED

The aim of the study was to establish reference values for plasma bile acid (BA) concentrations in a collection of healthy green iguanas and to compare the results with BA concentrations in iguana patients presented to the clinic with various types of chronic liver diseases, patients with other chronic diseases and healthy iguanas that were presented for routine or pre-surgical health check-up. The concentration of BA was determined using the enzymatic colorimetric method. Mean plasma bile acid concentration in 110 samples from healthy green iguanas fasted for 24 h was higher (15.89 ± 15.61 μmol/l) than plasma bile acid concentration in the same iguanas fasted for 48 h (9.56 ± 8.52 μmol/l) (P < 0.01). The 3α-hydroxy bile acid concentration was significantly altered in 9 patients suffering from chronic liver diseases (diagnosed by histology) (84.85 ± 22.29 µmol/l). BA concentration in one iguana with hepatocellular adenoma (13.0 µmol/l) was within the interval of BA in healthy iguanas. Mean plasma BA concentration in 10 green iguanas that were suffering from various types of chronic diseases, but without any hepatopathy was 7.85 ± 4.86 μmol/l. The mean plasma BA concentration in 18 samples from green iguanas presented to the clinic for routine health check-ups and 17 green iguana females with preovulatory follicle stasis (POFS) syndrome presented for ovariectomy was 11.95 ± 9.43 μmol/l and 12.97 ± 9.06 μmol/l, respectively. The data collected from this study suggest that plasma bile acids are significantly increased in green iguanas suffering from chronic liver diseases.

Assessment of chemical contaminants in fresh and packaged tender coconut (Cocos nucifera) waterShort Communication

Padmaja Rambabu Jonnalagadda, Srujana Medithi, Summaiya Lari, Kalyan Chinthanuri, Yogeswar Dayal Kasa, Raju Nagaraju, Janardhan Vanka, Venkaiah Kodali

Czech J. Food Sci., 2022, 40(2):154-162 | DOI: 10.17221/200/2021-CJFS

Pesticide residues and heavy metals were analysed in both fresh tender coconut water (FTCW) (n = 161) and packaged tender coconut water (PTCW) (n = 126) samples collected from three southern states of India [Andhra Pradesh (AP), Kerala (KL), and Tamil Nadu (TN)]. A method validated in the laboratory using liquid chromatography-tandem mass spectrometry (LC-MS/MS) was used for pesticide residues, while heavy metals were analysed using a validated method of inductively coupled plasma-optical emission spectrometry (ICP-OES). Significant differences in heavy metal concentrations were assessed using analysis of variance (ANOVA) and post hoc test (between different varieties collected 'within' and 'among' states). FTCW samples [n = 9 (6%)] collected from TN showed Monocrotophos and Malathion residues in the range of 1.0 µg L-1 to 51.6 µg L-1 and 0.5 µg L-1 to 0.6 µg L-1, respectively, while they were detected in n = 5 (4%) of the PTCW samples at a range of 0.90 µg L-1 and 0.82 µg L-1 to 1.56 µg L-1. Heavy metals such as cadmium (Cd), chromium (Cr), lead (Pb), and stannum (Sn) were detected in different varieties collected from all three states. Some of the PTCW samples also contained traces of Cd, Cr, cobalt (Co), and Pb. Arsenic (As) was found in one sample from KL, while none of the samples was contaminated with mercury (Hg). The present study accentuates the need for fixing standards for the pesticide residues in coconut water.

Growth, carcass and meat quality in Zwartbles lambs slaughtered at different live weightsOriginal Paper

Tomá¹ Jano¹, Jan Kuchtík, Eli¹ka Draèková, Martin Ho¹ek, Tomá¹ Kopec, Radek Filipèík

Czech J. Anim. Sci., 2023, 68(10):414-422 | DOI: 10.17221/99/2023-CJAS

The aim of the study was to evaluate the effect of different live weights at slaughter (LWS) of Zwartbles lambs on their daily gain (DG), carcass traits (CT) and chemical and physical characteristics of the quadriceps femoris muscle (QFM). A total of four weight groups of lambs were evaluated: group A, LWS = up to 35 kg; group B, LWS from 35.1 to 40 kg; group C, LWS from 40.1 to 45 kg and group D, LWS from 45.1 to 50 kg. The LWS had a significant (P < 0.05) effect on DG and most CTs, when average DG and most weights of individual CTs increased with increasing LWS. The evaluation of the influence of LWS on the chemical and physical characteristics of QFM primarily shows that this factor had a significant (P < 0.05) effect only on the content of intramuscular fat (IMF) and redness index (RI), when in both cases the values of these traits increased (IMF: from 0.57 to 1.21%; RI: from 8.53 to 9.76) with increasing LWS. In conclusion, it can be stated that most of the monitored traits in all weight groups of Zwartbles lambs were comparable with their levels in specialized meat breeds of sheep.

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.

Integrated effect of residue management and drip irrigation on crop growth and water productivity of direct seeded riceOriginal Paper

Kanwar Barjinder Singh, Gurpreet Singh, Rajeev Kumar Gupta, Ahmed A. Al-Othman, Abed Alataway, Ahmed Z. Dewidar, Mohamed M. Mattar

Plant Soil Environ., 2023, 69(11):554-565 | DOI: 10.17221/105/2023-PSE

Crop residue management and water saving are the two major issues for the sustainability of the rice-wheat cropping system. Therefore, a two-year field experiment was conducted in a split-plot design to study the combined effect of three rice residues (residue incorporation (RI), residue standing (RS) and residue removal (RR) and two wheat residue incorporation (WI) and residue removal (WR) management in main plots and two irrigation regimes, i.e., flood (F) and surface drip (SD) in subplots on the growth and water productivity of direct seeded rice (DSR). During both years, RI-WI resulted in significantly higher plant height (PH), leaf area index (LAI) and dry matter accumulation (DMA) than in other residue management treatments. Drip irrigation significantly increased PH, LAI, DMA grain yield, straw, and biological yield, along with a 9.6% irrigation water savings over flood irrigation. During both years, grain yield, straw and biological yield of DSR were significantly higher in RI-WI than in RR-WR and RR-WI. RI-WI had significantly greater apparent water productivity (AWP) and actual water productivity (RWP) of DSR. Drip irrigation had significantly higher AWP and RWP during both years than flood irrigation except RWP during 2017. Transpiration efficiency (TE) in rice residue incorporation was significantly higher than in rice residue standing and removal. During both years, the TE of drip irrigation was also significantly higher than flood irrigation. So, incorporating rice and wheat residues along with drip irrigation improves crop growth and water productivity.

Approaches to estimation the farm-level economic viability and sustainability in agriculture: A literature reviewReview

Jindrich Spicka, Tomas Hlavsa, Katerina Soukupova, Marie Stolbova

Agric. Econ. - Czech, 2019, 65(6):289-297 | DOI: 10.17221/269/2018-AGRICECON

Estimation of farm economic sustainability and viability became more topical when redesigning the Common Agricultural Policy which should stabilise farm income and make agribusiness more viable and sustainable (typically in Czech areas facing natural constraints). The key question is how to calculate the income of farms or farm households not only to survive but also to grow sustainably. The article summarises and compares knowledge from 51 studies to provide a comprehensive discussion on different ways how to measure economic viability and sustainability to set income support for farms in the areas with natural constraints optimally. The authors found family farms and off-farm income as important limitations of FADN database (Farm Accountancy Data Network) for evaluation of the economic sustainability of farm household. Moreover, some financial ratios (Return on Assets - ROA and assets turnover) are not suitable viability indicators for farms with a high share of hired land (typically large legal entities). Joining family farms and legal entities, the authors recommend using modified Farm Net Value Added (MFNVA) allowing for opportunity costs of own land and non-land assets. The average wage in the economy or region is a better proxy for opportunity labour costs of unpaid work rather than average agricultural wage.

Morphological and molecular characterization of Neoscytalidium isolates that cause canker and dieback in Eucalyptus and Chinaberry trees in IraqOriginal Paper

Dleen Naji Abdulrahman, Raed A. Haleem

Plant Protect. Sci., 2023, 59(1):92-105 | DOI: 10.17221/82/2022-PPS


Neoscytalidium Dimidiatum isolates are the most pathogens associated with sooty canker and dieback in the stem and twigs of Eucalyptus and Chinaberry trees in the Kurdistan region of Iraq. Young trees showed branch dieback and yellowing leaves. The symptoms were further developed to sooty canker and dieback appeared on the main branch and trunk. N. dimidiatum colonies on potato dextrose agar were dense white at first and became dark gray to black within seven to ten days. Arthric dark brown conidia (6.6x 4.3 µm) were observed in the chain of mycelium. The color of the colonies was white at the beginning, then eventually turned greenish in seven days, and finally became black. The fungus produced white to olivaceous aerial mycelium with chains of chlamydospores and arthroconidia. Conidia were initially hyaline, ellipsoidal to globose, 4.1-9.8 m × 2.8-3.5m, with muriform septa. The inoculated Eucalyptus and Chinaberry seedlings displayed necrosis streaks along with the barks and xylem of the inoculation points. Combined dataset of internal transcribed spacer (ITS), Nuclear Ribosomal Large Subunite (LSU), and Beta tublin 2a (Bt2a) using Maximum Likelihood and Maximum Parsimony analysis support the monophyletic on Neoscytalidium dimidiatum isolates from Iraq (N. hyalinum (No. B21), and Neoscytalidium novaehollandiae (No. B22)). This is the first time to report Neoscytalidium dimidiatum on Chinaberry in Iraq.

Biostimulants improves the content of polyphenol in the potato tubersOriginal Paper

Krystyna Zarzecka, Marek Guga³a, Agnieszka Ginter, Iwona Mystkowska, £ukasz Domañski, Anna Sikorska

Plant Soil Environ., 2023, 69(3):118-123 | DOI: 10.17221/441/2022-PSE

Research was conducted to determine the content of total polyphenols (TP) in table potato tubers obtained in a three-year field experiment arranged as a split-plot design with three replicates. The first experimental factor included two potato cultivars: Oberon and Malaga, the second one being an application of the following biostimulants: PlonoStart, Aminoplant, Agro-Sorb Folium and the herbicide Avatar 293 ZC (clomazone + metribuzin). The polyphenol content of potato tubers was determined in the fresh tuber mass by the spectrophotometric method with the Folin-Ciocalteu reagent. The tuber content of polyphenols was affected by cultivars and test biostimulants. Cv. Malaga accumulated more polyphenols than cv. Oberon. Biostimulants + herbicide significantly increased an accumulation of polyphenolic compounds compared with tubers cultivated in the control unit which was not treated with the test products.

Evaluation of women’s participation and empowerment in community land rehabilitation programs: Lesson drawn from Wera District, Southern EthiopiaOriginal Paper

Tesfanesh Ababu, Gezahegne Siyoum, Deginet Berhanu, Gemedo Furo

J. For. Sci., 2023, 69(4):158-171 | DOI: 10.17221/165/2022-JFS

Local people’s socio-economic and natural resources, especially forest resources, have been affected by land degradation in Ethiopia in the past years. To combat this problem, rehabilitation of community-based degraded land has been performed since 1979. Rehabilitation of degraded land (RDL) is important for forest management strategy regarding the regeneration of degraded forests and related resources through women’s empowerment. Because empowered women are key users and managers of resources from rehabilitated land such as forest resources, which leads to sustainable utilization of forest products. The aim of the study was to evaluate women’s participation and empowerment in decision-making regarding the rehabilitation intervention. A total of 120 women households (60 user and 60 non-user
women) were selected using a stratified random sampling method. Data were collected using a household survey, focus group discussion and key informant interviews. The results revealed that there is a significant difference between user and non-user women in fetching water and fuelwood collection time. Furthermore, RDL contributes to improving user women’s economic status and social relationships such as livelihood opportunity, social network, build-up of trust and changes in social assets. The result also indicated that women able to participate in forest-related meetings, land use management, use and control of assets, decision-making, and in soil and water conservation measures. Further, user women had greater awareness compared to non-users due to participation in different meetings and other decision-making activities. The findings suggest that consideration of women’s participation in decision-making regarding the community land rehabilitation program is important to empower women equally with men.

Stem water potential, stomatal conductance and yield in irrigated apple treesOriginal Paper

Lenka Plavcová, Radek Jupa, Martin Mészáros, Klára Scháòková, Zuzana Kovalíková, Jan Námìstek

Plant Soil Environ., 2023, 69(7):303-313 | DOI: 10.17221/160/2023-PSE


Plant-based indicators of water status, such as midday stem water potential (Ψstem) and leaf stomatal conductance (gs), are used to optimise irrigation scheduling in horticultural crops because they integrate the effect of soil and climatic conditions and the internal physiological constraints. The use of these indicators relies on experimentally acquired thresholds that relate the value of the indicator to negative effects on yield. In five irrigation treatments, we monitored yield, fruit size and the courses of Ψstem and gs throughout four consecutive growing seasons. We found that Ψstem was more sensitive to irrigation treatment than gs. Both indicators increased with available soil water content (ASWC) and decreased with evaporative demands of the atmosphere (ETC). On a seasonal basis, crop load had a stronger impact on gs than Ψstem. In summary, our study explored the effect of environmental conditions and crop load on plant-based indicators of tree water status and can be useful for establishing thresholds for irrigation scheduling in apple tree orchards.

In vitro evaluation of the composition and acaricidal efficacy of Urtica fissa leaf ethyl acetate extract against Sarcoptes scabiei mitesOriginal Paper

F Liao, T Bao, G Tao, Y Hu, C Han

Vet Med - Czech, 2023, 68(5):200-207 | DOI: 10.17221/6/2023-VETMED

In veterinary medicine, natural products provide an alternative to chemical agents for mite management. In the present study, the acaricidal efficacy of Urtica fissa leaf ethyl acetate extract against Sarcoptes scabiei mites was examined. The chemical composition of the extract was determined using liquid chromatography-mass spectrometry (LC-MS) analysis. The ethyl acetate extract was found to be extremely toxic to mites at a concentration of 100 mg/ml (m/v), killing all S. scabiei within two hours. The median lethal time (LT50) values for ethyl acetate extract concentrations of 25, 50, and 100 mg/ml against S. scabiei were 1.706, 1.204, and 0.750 h, respectively. The median lethal dosage (LC50) for S. scabiei was 19.14 mg/ml at two hours. The chemical composition of the ethyl acetate extract was evaluated using LC-MS, showing that the major components were schaftoside (8.259%), carnosol (6.736%), prostaglandin A2 (5.94%), 13(S)-HpOTrE (4.624%), nandrolone (4.264%), 1H-indole-3-carboxaldehyde (4.138%), 9-oxoODE (3.206%), and stearidonic acid (2.891%). In conclusion, these findings indicate that Urtica fissa contains promising new acaricidal compounds capable of successfully controlling animal mites.

Effect of microbiologically enriched fertilizers on soil microorganisms in the rhizosphere of apple treesOriginal Paper

Lidia Sas Paszt, Urszula Smoliñska, Pawe³ Trzciñski, Augustyn Mika, S³awomir G³uszek, Edyta Derkowska, Anna Lisek, Krzysztof Górnik, Beata Sumorok, Magdalena Szczech, Beata Kowalska, Waldemar Treder

Hort. Sci. (Prague), 2023, 50(3):189-198 | DOI: 10.17221/97/2021-HORTSCI


In long-term cultivation of apple trees, replantation disease may occur, caused by a set of biotic and abiotic factors, occurring in the soil, e.g. the accumulation of pathogenic and harmful microorganisms. Beneficial microorganisms can be of great importance in limiting orchard replant disease. In our study, the Urea fertilizer was enriched with Aspergillus niger and Purpureocillium lilacinum fungi, while the Polifoska 6 and Super Fos Dar 40 fertilizers with strains of the bacteria Bacillus spp., Bacillus amyloliquefaciens, and Paenibacillus polymyxa. The aim of the three-year study was to determine what effects the application of mineral fertilizers enriched with beneficial microorganisms, applied in 100% doses and in doses lower by 40% had on the microorganisms in the rhizosphere of apple trees. The number of bacteria of the genus Pseudomonas in the rhizosphere of apple trees was the highest in the combination with Urea 60% + fungi and Polifoska 60% + bacteria. These values were 2–3 times higher compared with the control. In the combination with Polifoska 60% + bacteria, the number of fluorescent Pseudomonas bacteria was five times higher compared to the control. The highest number of actinomycetes was observed in the third year of the study, in the combination with Polifoska 60% + bacteria. The use of this fertilizer increased the number of these bacteria more than five-fold compared with the control. The beneficial effect of Polifoska 60% + bacteria, Super Fos Dar 100% + bacteria, and Urea 60% + fungi on phosphate-solubilizing bacteria was observed in the third year of cultivation. The additional application of filamentous fungi together with Urea did not have a significant effect on this group of microorganisms. The obtained results show that in many cases the application of the selected fertilizers positively influenced the microorganisms inhabiting the apple-tree rhizosphere. Particularly noteworthy is Polifoska enriched with the selected bacteria, the use of which significantly increased the number of beneficial bacteria of the genus Pseudomonas.

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.

9th International Barley Genetics Symposium 20-26 June, 2004, Brno, Czech Republic

J. ©punar

Czech J. Genet. Plant Breed., 2004, 40(4):148 | DOI: 10.17221/6093-CJGPB

Organic versus conventional ‘Willamette’ raspberry: yield, bioactive compounds and antioxidant propertiesOriginal Paper

Senad Murtiæ, Milena Ðuriæ, Jasmin Fazliæ, Fikreta Behmen, Sanel Haseljiæ, Amina ©erbo, Haris Berbiæ

Hort. Sci. (Prague), 2023, 50(4):275-282 | DOI: 10.17221/164/2022-HORTSCI

This paper presents the results of a two-year trial on the yield, total phenolic and flavonoid contents and total antioxidant capacity of the ‘Willamette’ red raspberry under organic and conventional farming. A trial was conducted in a commercial plantation of ‘Willamette’ raspberries located in the southwestern part of Serbia. The total phenolics and flavonoids in the raspberry fruits were determined by the Folin-Ciocalteu reagent and aluminium chloride assay, respectively. The ferric reducing antioxidant power assay was used to evaluate the total antioxidant capacity of the raspberry fruits. The results of this study showed that the raspberry yields were significantly affected by the different farming systems. The raspberry yield in conventional farming was higher than that of organic farming. Contrastingly, the raspberries from the organic farming contained higher levels of the total phenolics and flavonoids and also had a higher total antioxidant activity compared to those from the conventional farming in both 2021 and 2022. This study also showed that the total phenolic and flavonoid contents of the ‘Willamette’ red raspberry have a significant and positive correlation with their total antioxidant capacity, indicating that the phenolic compounds play an important role in the antioxidant activity of the raspberry.

Jasmonic acid biosynthetic inhibitor ibuprofen inhibits the accumulation of ascorbic acid in strawberry fruit induced by lanthanum nitrateOriginal Paper

Haifang Dai, Damiao Yuan, Changjuan Shan

Plant Soil Environ., 2023, 69(3):95-104 | DOI: 10.17221/384/2022-PSE

By using jasmonic acid (JA) biosynthetic inhibitor ibuprofen (IBU), we investigated the roles of JA in the process of lanthanum nitrate (La(NO3)3)-regulated ascorbic acid (AsA) content and metabolic enzymes responsible for AsA metabolism in strawberry fruit. Findings demonstrated that La(NO3)3 markedly improved AsA content by enhancing the activities and transcript levels of glutathione reductase (GR), dehydroascorbate reductase (DHAR), monodehydroascorbate reductase (MDHAR) and L-galactono-1,4-lactone dehydrogenase (GalLDH), and inhibiting the activities and transcript levels of ascorbate peroxidase (APX) and ascorbic acid oxidase (AAO). In comparison with La(NO3)3 alone, all the concentrations of IBU plus La(NO3)3 markedly inhibited the activities and transcript levels of DHAR, MDHAR, GalLDH and AAO, and improved the activities and transcript levels of GR and APX, which further reduced AsA content. Besides, La(NO3)3 increased JA content and IBU decreased JA content induced by La(NO3)3. Meanwhile, the results of Pearson correlation analysis showed that JA content had significant correlations with the activities and transcript levels of DHAR, MDHAR and GalLDH. Above findings implied that La(NO3)3 induced JA production, which further increased AsA content in fruits by mainly up-regulating the activities and transcript levels of DHAR, MDHAR and GalLDH.

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.

Estimation of corn coefficients with vegetation indices using multispectral camera and droneOriginal Paper

Christos Dimitrios Papanikolaou*, Maria Andreas Sakellariou-Makrantonaki

Res. Agr. Eng., 2023, 69(1):36-47 | DOI: 10.17221/19/2022-RAE

Optimum irrigation scheduling and new technologies are the key to the successful practice of modern agriculture and natural resources, such as water management. Α three-year research project was conducted at Velestino, Magnesia, Greece. The aim was to study whether vegetation indices can be used to estimate the crop coefficients of corn in order to apply an intelligent method of irrigation using drones in the future. The normalised difference vegetation index (NDVI), the soil-adjusted vegetation index (SAVI), the renormalised difference vegetation index (RDVI) and a new index [difference infrared – green vegetation index (DIGVI)] were calculated using multispectral photos from a camera adapted to a drone. Three different methods were applied to calculate the crop coefficients: (i) the water balance and the FAO Penman-Monteith reference evapotranspiration, (ii) the climatic data, (iii) the vegetation indices. The irrigation dose covered 100% of the crop water needs according to the soil moisture measurements and the single crop coefficient values. The statistical analysis and the simple linear regression method showed that the corn crop coefficients can be estimated when these indices are used as independent variables.

Vermiliquer as a biostimulant and antioxidant in hydroponic lettuce (Lactuca sativa) productionOriginal Paper

Adrian Esteban Ortega-Torres, Tomás Sabino Herrera-Matallana, Enrique Rico-García

Hort. Sci. (Prague), 2023, 50(1):25-31 | DOI: 10.17221/5/2022-HORTSCI

The use of vermiliquers obtained from earthworm in hydroponic crops is well received as alternative for fertilization of leafy vegetables. The vermiliquer boosts growth, defense compounds and increases the uptake of nutrients and minerals by plants. The growth and enzymatic activities related to stress and phenolic compounds were explored in hydroponic lettuce crops treated with different concentrations of vermiliquer. The treatments consisted in three different vermiliquer, a Mesh Vermiwash, a Direct Vermiwash, and the Vermileachate, and its combinations as a complement for complete fertilization. The addition of vermiliquer to hydroponic lettuce affected the leaf and root fresh weight, and reactive oxygen species like superoxide dismutase (SOD) or phenylalanine ammonia-lyase (PAL). Vermileachate (Vl) plus Direct Vermiwash treatment was higher in the first week in leaf and root lettuce, indicating an effect biostimulant. Vl gave the highest enzymatic activity in SOD and PAL, indicating an effect elicitor. In summary, vermiwash proved to improve hydroponic lettuce crop and enzymatic activities related to stress.

Detection of the T1640C RYR1 mutation indicating malignant hyperthermia in dogsShort Communication

J Haluskova, B Holeckova, L Kokulova, M Galdikova, J Bucan, V Schwarzbacherova, S Sedlakova

Vet Med - Czech, 2023, 68(11):428-434 | DOI: 10.17221/46/2023-VETMED

Malignant hyperthermia (MH) is a clinical syndrome exhibiting elevation of expired carbon dioxide, hyperthermia, muscle rigidity, rhabdomyolysis, acidosis and hyperkalaemia, as well as cardiac dysrhythmia and renal failure. The syndrome manifests itself as a response to anaesthetic agents, such as e.g., halothane, desflurane, and succinylcholine. Depending on the animal species, MH is characterised by autosomal dominant or recessive inheritance, and so far two genes have been identified whose mutations can be linked to MH: RYR1 and CACNA1S. In different species, various mutations of the RYR1 gene have been described which may underlie MH. One of these mutations in dogs is T1640C, which results in the substitution of alanine for valine of the amino acid 547 (V547A) in the RYR1 protein. In our work, we aimed to investigate MH at the DNA level by identifying the T1640C mutation in a group of 50 dogs. For this purpose we used the PCR-RFLP technique, and in six dogs also direct sequencing of PCR products and subsequent comparison of their sequences with the RYR1 gene sequence in an online database. The results of our study show that none of the dogs analysed had any mutant allele of the RYR1 gene, indicating that none should be affected by MH.

The effect of irrigation treatments at different development stages on the bioactive components of sunflower cakeOriginal Paper

Erhan Göçmen, Sıla Barut Gök, Yasemin Erdoğdu

Plant Soil Environ., 2023, 69(4):179-187 | DOI: 10.17221/440/2022-PSE

The aim of the study was to determine the effect of water deficiency at different development stages on the bioactive content and phenolic compounds in sunflower (Helianthus annuus L.) cake, the residue left after oil is extracted from sunflower seeds. A sunflower genotype was randomly planted in a complete block design with eight different combinations of irrigation (T1–T8) by increasing the available soil moisture measured at different plant growth stages (vegetative, flowering and grain formation). Results indicated that the total phenolics of extracts varied between 1.03–2.03 times more than under drought stress (T8). The antioxidant capacity response of seed cake was 14–39% lower than under drought stress. Irrigation treatment, except in the grain formation stage, was found to enhance the biosynthesis of phenolic compounds such as vanillic and caffeic acids. Irrigation only in the grain formation stage induced the accumulation of phenolic compounds such as coumaric acid and rutin hydrate. The present study established that residues resulting from oil extraction could be converted to a polyphenol-enrichment agent for food systems by manipulating the irrigation treatments.

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