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Results 661 to 690 of 2032:
Influence of the storage duration on the health promoting tyrosine, tryptophan, and total phenolics in potato tubersOriginal PaperRita Asakaviciute, Zita MaknickieneCzech J. Food Sci., 2024, 42(2):93-99 | DOI: 10.17221/161/2023-CJFS This research investigated the influence of the storage duration on the health promoting tyrosine, tryptophan and total phenolics in potato tubers. In the course of storage, the total amount of accumulated compounds in the dry mass of organically grown potato tubers increases. This is determined by individual properties of potato variety, storage time, and interaction of these two factors (P < 0.05). Organic potato tubers show increased total phenolic compounds in their dry matter during storage. This is due to a variety of characteristics, storage time and the interaction of these two factors (P < 0.05). A more pronounced increase in total phenolic compounds during storage was observed in 2022 than in 2021. |
Assessment of agricultural land salinization via soil analysis and remote sensing data: Case study in Pavlodar region, KazakhstanOriginal PaperDauren Rakhmanov, Boøivoj ©arapatka, Kamilla Alibekova, Jan Èernohorský, Petr Hekera, Zhassulan SmanovSoil & Water Res., 2024, 19(2):111-121 | DOI: 10.17221/5/2024-SWR Soil salinization is one of the most widespread soil degradation processes, especially in arid and semi-arid regions. In such climatic conditions, soluble salts accumulate in the soil, leading to deterioration in soil properties and ultimately reduced crop yield. The purpose of this study was to analyse the relationship between the level of soil salinity and the main spectral indicators obtained from Landsat satellite data. The studied area was the Maisky district, which is located in the southeastern part of the Pavlodar region of Kazakhstan. The variants of the research were agricultural lands using sprinkler irrigation and flood irrigation, as well as sites without irrigation. To analyse the relationships, we used the normalized difference vegetation index (NDVI), salinity indices (SI) and soil indices such as SI 1, SI 2, SI 3, SI 4, normalized difference salinity index (NDSI), soil adjusted vegetation index (SAVI), and brightness index (BI). The normalized difference salinity index (R-NIR)/(R + NIR), using a quadratic statistical relationship, showed the best correlation with the laboratory data. The vegetation index NDVI showed the weakest correlation due to dryness or poor crop growth. As a result of the lack of clear control over irrigation and agrotechnical measures, the indicators of cation exchange capacity in irrigated plots using the flooding method were higher than in other irrigation methods. During irrigation, it is necessary to ensure clear rules, according to which the supplied water and fertilizers will have a positive effect on the soil and the entire agroecosystem. The methods used in this research can be useful in mapping and studying saline soils using satellite data in natural and climatic conditions of arid and semi-arid regions. |
High percentage of morphological defects in sperm of the Zemplin rabbit breed: A major obstacle to fertility?Original PaperJakub Vozaf, Andrea Svoradová, Jaromír Va¹íèek, Lucia Olexiková, Andrej Balá¾i, Hana Ïuránová, Alexander Ostró, Silvia Toporcerová, Peter ChrenekCzech J. Anim. Sci., 2024, 69(5):191-199 | DOI: 10.17221/29/2024-CJAS This research investigates the high prevalence of morphological defects in the sperm of a particular rabbit breed, namely the Zemplin rabbit (ZR). We tried to uncover the possible causes and consequences of the observed abnormalities. Ejaculate samples from ten adult males were divided into two qualitative groups according to the motility parameters revealed by CASA (computer-assisted sperm analysis). Group A contained samples with total motility (TM) above 50% and progressive motility (PM) above 30%. Group B contained samples with TM and PM below these values. Viability (SYBR-14/DRAQ5TM and SYTOXTM Green/DRAQ5TM staining) and apoptosis (YO-PRO TM-1/DRAQ5 TM stainig) analyses through flow cytometry served as an additional insight into the characteristics of the qualitative groups. In both cases, we noted significant differences (P < 0.05) between groups which corresponded to motility values. Both groups showed an increased incidence of abnormal spermatozoa, and we did not observe any significant differences between them. Simultaneously, we assessed the practical implications of these sperm defects on artificial insemination (AI), and also, we did not notice any significant differences in these parameters. The use of transmission electron microscopy enhanced our understanding of the morphological defects at the ultrastructural level. In summary, the study provides an understanding of the qualitative differences in rabbit semen, highlighting variations in quality parameters. While these differences exist, they may not necessarily translate into significant variations in AI outcomes. Our study shows higher values of cytoplasmic droplets in ZR semen, but it also shows that these conditions do not necessarily mean a fundamental obstacle to fertility in the case of AI. |
Mitigation of arsenic toxicity in rice grain through soil-water-plant continuumReviewOkram Ricky Devi, Bibek Laishram, Abhijit Debnath, Gangadhara Doggalli, Nayanjyoti Ojha, Smita Agrawal, Kahkashan Perveen, Najat A. Bukhari, Kalyan Pathak, Samiron DuttaPlant Soil Environ., 2024, 70(7):395-406 | DOI: 10.17221/470/2023-PSE Increased levels of the non-essential hazardous metalloid arsenic (As) in rice grains pose a threat to human health and the sustainability of the rice industry. In several counties, the average As contamination in polished rice has been detected to range from 0.002 to 0.39 mg/kg, which is above the safe limit of 1 mg/kg as recommended by the World Health Organisation. Beyond this limit, the digestive tract, circulatory system, skin, liver, kidney, nervous system and heart can be affected. Humans can develop cancer from consuming or inhaling As. In addition, long-term exposure to drinking water contaminated with arsenic has also been linked to a dose-response relationship with an increased risk of hypertension and diabetes mellitus. Rice has been shown to be an indirect source of arsenic accumulation in human bodies. Under flooded paddy soil, trivalent arsenate (AsIII) occupies 87–94% of the total As, while under non-flooded soil, pentavalent arsenate (AsV) predominates (73–96% of the total As). This review aims to provide a thorough and interdisciplinary understanding of the behaviour of As in the paddy soil and transportation to rice grain and further investigate efficient ways to limit arsenic contamination. Supplementation of soil with specific mineral nutrients such as iron (Fe), sulphur (S) and silicon (Si) can significantly decrease the arsenic accumulation in rice grain by minimising its uptake and translocation. The hydrogen bonding potentials of uronic acids, proteins and amino sugars on the extracellular surface of soil microorganisms facilitate the detoxification of arsenic species. Further, rice is absorbed less when exposed to aerobic water management practices than anaerobic ones since it reduces the build-up of As in rice, and the solution is immobilised as in the soil. |
Effect of ripening temperature on early-season ‘Hass’ avocado fruit exocarp colour development and pigmentation during ripeningOriginal PaperDecember Simphiwe Sibeko, Kingsly Shikwambana, Nhlanhla MathabaHort. Sci. (Prague), 2024, 51(2):152-159 | DOI: 10.17221/72/2023-HORTSCI South African ‘Hass’ avocado fruit harvested early season are vulnerable to colour desynchronisation with softening during ripening, reducing their international and local market aesthetic value. So far, research has proven that ‘Hass’ avocado fruit exocarp colour desynchronization is an early season conundrum. However, there is insufficient literature on underlying factors causing exocarp colour desynchronisation. Therefore, the study aimed to investigate the ripening temperature effect on early season ‘Hass’ avocado fruit exocarp colour development and pigments during ripening. Early season ‘Hass’ avocado fruit were stored at 5.5 °C for 28 days thereafter, ripened at 16, 21 and 25 °C and evaluated for firmness, visual and objective colour (L*, C* and h°), total chlorophyll and anthocyanin content. The results showed that the visual colour of fruit ripened at 25 °C was significantly higher compared to 21 and 16 °C after 2 and 4 ripening days. This study found that ripening temperature had no significant influence on chlorophyll degradation. However, fruit ripened at 25 °C accumulated significantly higher exocarp anthocyanin concentration compared to lower ripening temperatures. In conclusion, ripening early season ‘Hass’ avocado fruit at 25 °C resulted in improved exocarp colour development and anthocyanin accumulation. |
Responses of seed germination of Xanthium orientale L. and Xanthium spinosum L. to temperatureOriginal PaperBiljana Keleèeviæ, Zlatan Kovaèeviæ, Sini¹a Mitriæ, Sava VrbnièaninPlant Protect. Sci., 2024, 60(3):295-304 | DOI: 10.17221/124/2023-PPS Species of the genus Xanthium (cocklebur) are invasive plants widespread all over the world. In Bosnia and Herzegovina, Xanthium orientale L. was an invasive species, while Xanthium spinosum L. was an economically harmful weed species. The reason these species are spread over vast areas and across various climate conditions must be attributed to their biology, particularly the biology of their seeds. Germination of populations of X. orientale and X. spinosum at a temperature range of 15 °C to 40 °C over 2 to 20 days ranged between 15.0% (X. spinosum) and 90.0% (X. orientale). By means of the application of a statistical model, a positive correlative dependence of temperature and time on seed germination was determined (X. orientale = 80.70%, X. spinosum = 62.20%), which provided a possibility of modelling the seed germination of Xanthium species in various ecological conditions. The optimal germination temperature for both cocklebur species was 30−35 °C. As the germination of seeds was recorded at all researched temperatures (15, 20, 25, 30, 35 and 40 °C), it points to a wide ecological valence for the considered abiotic factor. These results suggest that the unique germination biological characteristics of the Xanthium genus made it extremely easy for the species to form monodominant communities in new habitats and climate-changing environments quickly. |
Molecular, morphological and phytochemical characterization of some watermelon (Citrullus lanatus L.) genotypesOriginal PaperÖmer Faruk Coºkun, Osman GülºenHort. Sci. (Prague), 2024, 51(3):189-201 | DOI: 10.17221/5/2023-HORTSCI Watermelon (Citrullus lanatus L.) is grown in tropical and temperate regions and an economically important crop. Characterization studies of watermelon may provide valuable information for breeding and research programs. The objectives of this study were to determined of morphological, phytochemical, genetic diversity and population structure among the watermelons. Morphological and phytochemical variations including sugar contents were determined in 96 watermelon genotypes grown in the field. The average number of fruits per plant was determined as 2.52 ± 0.06, and the average yield was determined as 6.2 ± 0.11 kg/m2. The mean total sugar was determined as 6.27 ± 0.12 %, and the lowest value was measured in genotype 234 (1.1%); the highest value was measured in genotype number 184 (8.66%). A total of 62 SSR (Simple Sequence Repeat) primers were used in the molecular characterization study. The similarity coefficients among the 96 genotypes varied between 0.23 and 0.99. This study indicates that there is a wide morphological and sugar parameters variation among watermelon genotypes but narrow molecular genetic diversity. It also provides useful information for watermelon breeding studies. |
The role of the water regime in a reclaimed limestone quarryOriginal PaperMarcela Burnog, Ale¹ KuèeraJ. For. Sci., 2024, 70(8):391-406 | DOI: 10.17221/6/2024-JFS This study focused on the hydrophysical characteristics of an abandoned limestone quarry in Czechia. Six sites were examined; two sites were undergoing natural succession (the Quarry Wall and Reed Canary Grass plots, which had undeveloped arboreal layers) and four sites were undergoing managed forest reclamation. Of the four forest reclamation sites, three were classified as prospering (the Prospering Lime, Prospering Maple and Prospering Lime + Oatgrass plots) and one was in decline (the Declining Larch + Lime plot). The arboreal layer included small-leaved lime (Tilia cordata Mill.), sycamore maple (Acer pseudoplatanus L.), and European larch (Larix decidua Mill.). Our results showed that Lime + Oatgrass plot retained more water than other plots. Field soil moisture measurements indicated that throughout the 1096-day monitoring period, only the soils at the successional sites reached the wilting point (Quarry Wall plot: 159 days; Reed Canary Grass plot: 43 days). Soil heterogeneity in the reclaimed areas was due to variation in the soil profile depth, disturbance from mining activities, reclamation efforts, and the availability of quality soil material. Soil conditions and the dynamics at the quarry created less than ideal conditions for tree regeneration. This primarily relates to limiting and significantly heterogeneous successional plots. |
Are technological or efficiency differences more pronounced between Hungarian and Polish poultry farms? A stochastic metafrontier analysisOriginal PaperLajos Baráth, Imre Fertõ, Jakub StaniszewskiAgric. Econ. - Czech, 2024, 70(8):406-413 | DOI: 10.17221/322/2023-AGRICECON
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Molecular identification of yellow rust resistance genes in some wheat and triticale cultivars and their resistance to Puccinia striiformis f.sp. triticiOriginal PaperEmad Mahmood Al-Maaroof*, Sarkawt Hama Salih AliCzech J. Genet. Plant Breed., 2024, 60(4):223-236 | DOI: 10.17221/39/2024-CJGPB Yellow rust (YR), caused by Puccinia striiformis f.sp. tritici (Pst), is a global threat to wheat production. In this study the response of 46 wheat and triticale cultivars to Pst at the adult plant stage (APS) was evaluated during two successive growing seasons at Sulaimania, Iraq. Also, we used a molecular analysis to find the yellow rust resistance (Yr) genes present in the individual cultivars. The results revealed large differences in the response to Pst between the cultivars. Most of the cultivars were susceptible to YR; the mean coefficients of infection (CI) varied from 0.23 in cv. Sarah to 83.33 in Hsad. High resistance levels were found in Al-Wand, Kalar 1, Rezan, and Sarahat APS, while Al-Rashid, Charmo, Faris 1, Maaroof, Rabiea, and Iratom displayed moderate resistance. The level of Yellow rust infection was higher in 2023 than in 2022 in most tested cultivars. Molecular analysis revealed the highest number of Yr genes (Yr2, Yr5, Yr7, Yr9, Yrvav, Yr15, Yr24, Yr26, and Yr32) in the cv. Al-Wand, followed by Sulaimani 2 with eight Yr genes (Yr2, Yr5, Yr7, Yr9, Yr15, Yr24, Yr26, and Yr32). Only one Yr gene was found in Iratom and Tamuz 3. Yr2 was the most frequently identified gene, present in the majority of tested cultivars (87%), followed by Yr7 (76%) and Yr9 (74%), respectively. |
How to measure soil quality? A case study conducted on cropland in the Czech RepublicOriginal PaperLenka Pavlù, Jiøí Balík, Simona Procházková, Ivana Galu¹ková, Lubo¹ BorùvkaSoil & Water Res., 2024, 19(4):229-243 | DOI: 10.17221/118/2024-SWR This work presents the advantages and risks of selected soil quality criteria using data from the monitoring of agricultural soils in the Czech Republic. Soil samples were taken from 71 sites covering various soil types. Basic soil parameters and mid-infrared spectra were measured. Indicators describing the quality of soil organic matter (SOM), and soil were calculated. The results show that soil types differ significantly in the qualitative indicators of soil organic matter. More acidic soils with lower clay content contain lower proportions of aromatic and higher proportions of aliphatic organic compounds than neutral soils with higher clay particles content. These soils differ little in total carbon content and C/N ratio but considerably in C/clay ratio. Cambisols are the least degraded soils in the Czech Republic in terms of C/clay ratio, which is controversial in many respects. The results indicate that more aliphatic organic matter is important for the SOM content in the upper part of the agricultural soil, and more aromatic organic matter is mainly bound to the clay fraction. The results raise questions about the suitability of uniform C/clay target values proposed in European legislation as a criterion for assessing soil degradation due to carbon loss. |
Does the incidence of egg yolk influence the meat quality and fatty acid profile of broilers of two chicken genotypes?Original PaperAntonella Dalle Zotte, Marco Cullere, Bianca Palumbo, Tamás Donkó, Zoltán Sütõ, Gábor MilisitsCzech J. Anim. Sci., 2024, 69(9):378-387 | DOI: 10.17221/122/2024-CJAS
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Economic parameters of the natural forest regeneration in changing conditions – A case studyOriginal PaperStanislav Novotný, Josef Gallo, Vilém PodrázskýJ. For. Sci., 2024, 70(10):529-538 | DOI: 10.17221/56/2024-JFS Natural regeneration is a crucial factor in improving the economy of forest estates. The presented study analysed the economic parameters of three different approaches to forest regeneration: (i) artificial regeneration with Norway spruce, (ii) a 25% admixture of soil-improving and stabilising species (SSTS), and (iii) natural regeneration. The expenses for these specific operations related to individual regeneration methods were derived. These variants were investigated before the bark beetle calamity (2014) and after the outbreak (2023) for management sets (MS) 531, 551, 571, and 591, i.e. for acidic, nutrient-rich, gleyed, and waterlogged sites of higher elevations. In all cases, natural regeneration decreased expenses by approximately 2 000 EUR·ha–1 (50 000 CZK·ha–1) to 6 000 EUR·ha–1 (150 000 CZK·ha–1). The 25% admixture of SSTS increased the expenses. The proportion of natural regeneration subsequently decreased due to the bark beetle calamity from roughly 40% to 10% in recent years, which is comparable with the Czech Republic as a whole. |
Approach to creating an intelligent system for free-range livestock farmingOriginal PaperRadka Malinova, Pencho Malinov, Evgeni Valchev, Todorka GlushkovaCzech J. Anim. Sci., 2024, 69(10):389-399 | DOI: 10.17221/90/2024-CJAS
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Study on the main physicochemical characteristics of different plant cultivation substrates and their effects on standard rosesOriginal PaperYingguo Wang, Tingting Cao, Juan Li, Hang Zhou, Haiou ZhangPlant Soil Environ., 2024, 70(12):799-808 | DOI: 10.17221/258/2024-PSE Standard roses are a widely used ornamental plant in urban landscapes, valued for their attractive flowers and adaptability to various environmental conditions. This study investigated how different substrate types affect the growth and development of standard roses and their potential to improve the ecology of urban landscapes. Nine substrate conditions (rotted corn stover, decomposed shiitake mushroom residue, perlite, and combinations) were compared with field soil as a control treatment. The physical and chemical characteristics of each substrate were analysed, and the growth and development of standard rose plants were observed over six months. The results indicated that the substrate T4 (70% rotted corn stover, 15% decomposed shiitake mushroom residue, 15% perlite) achieved the highest evaluation index, leading to superior plant growth compared to other substrates. This combination provided optimal water retention, aeration, and nutrient supply, making it the most effective substrate for cultivating standard roses. Additionally, the use of these substrates can improve soil quality and reduce environmental pollution, offering a sustainable option for urban landscape management. |
Comparative evaluation of high pressure processing and thermal pasteurisation on phytochemicals, microbial and sensorial attributes of sweet cherry (Prunus avium L.) juiceOriginal PaperToheed Ahmad, Hafiz Muhammad Shahbaz, Khalid Saeed, Sanaullah Iqbal, Habib RehmanCzech J. Food Sci., 2024, 42(6):405-414 | DOI: 10.17221/77/2024-CJFS
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Modelling of energy demand prediction system in potato farming using deep learning methodOriginal PaperRiswanti Sigalingging, Nasha Putri Sebayang, Noverita Sprinse Vinolina, Lukman Adlin HarahapRes. Agr. Eng., 2024, 70(4):198-208 | DOI: 10.17221/115/2023-RAE Agriculture and energy are intricately connected, with agriculture being a significant energy consumer and supplier. In this comprehensive study, SPSS and Jupyter Notebook were used to model and predict the energy requirements of potato plants during cultivation. A system using deep learning methods, specifically the Convolutional Neural Network (CNN), was also developed to accurately predict the classification of potato plant growth phases using image data. The CNN model, developed with 100 epochs and 5 layers, used 1 125 image data of potato plants, categorising them into two classes: the vegetative phase, with an energy requirement of 4 195.80 MJ·ha–1, and the generative phase, with an energy requirement of 746.45 MJ·ha–1. The model‘s accuracy in reflecting the actual data, with a mean absolute error of 0.11, mean square error of 0.01, and root mean square of 0.13, indicates no significant issues. The test predicted categorization with 99% precision, underscoring the thoroughness and validity of this study and reassuring the audience about the accuracy of the results. The study findings not only validate the use of deep learning in agriculture but also inspire the development of applications to predict the energy demand for each growth phase using plant image data. |
Label-free proteomics to identify keratins and keratin-associated proteins and their effects on the fleece traits of Inner Mongolia Cashmere GoatsOriginal PaperChongyan Zhang, Yuchun Xie, Juntao Guo, Xin Su, Cun Zhao, Qing Qin, Dongliang Dai, Zhixin Wang, Jinquan Li, Zhihong LiuCzech J. Anim. Sci., 2023, 68(1):17-29 | DOI: 10.17221/93/2022-CJAS
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Challenges and innovative approaches in the agricultural and food industry and changing consumer behaviour in the milk and milk products market: Case of SlovakiaOriginal PaperZuzana Kapsdorferova, Matej Èere¹, Veronika Zábojníková, Petronela ©vikruhová, Radka KatanikováAgric. Econ. - Czech, 2023, 69(6):246-254 | DOI: 10.17221/119/2023-AGRICECON
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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 PaperSabri Erbaº, Hasan Baydar, Halil Hatipoğlu, Hasan Koç, Metin Babaoğlu, Arzu KöseCzech 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. |
Effect of debranching enzyme hydrolysis and microwave treatments on the resistant starch enrichment of breadfruitOriginal PaperThanh Le, Trang Tran, Tuyen Kha*Czech J. Food Sci., 2024, 42(1):1-9 | DOI: 10.17221/136/2023-CJFS
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Biochar application influences the stability of soil aggregates and wheat yieldsOriginal PaperWeijun Yang, Zilong Wang, Hongmei Zhao, Daping Li, Hongtao Jia, Wanli XuPlant Soil Environ., 2024, 70(3):125-141 | DOI: 10.17221/199/2023-PSE In the present study, a field establishment was initiated in 2018 with eight treatment conditions using biochar application rates of 0, 10, 20, or 30 t/ha and nitrogen application rates of 0 or 150 kg/ha. After two years, the impact of biochar on carbon-nitrogen distributions, soil aggregate stability, and wheat yields was then assessed. The predominant mechanical aggregates after two years were > 5 mm and 2–5 mm granular aggregates, with notable increases in the amounts of these aggregates following the application of biochar with or without nitrogen that coincided with an increase in soil aggregate mechanical stability. Relative to control conditions, aggregate mean weight diameter (MWD) and geometric weight diameter (GMD) values rose by 17.6% and 24.3% for biochar with nitrogen treatment (N: 150 kg/ha; biochar: 20 t/ha), respectively. Biochar application alone and the application of both biochar and nitrogen fertiliser were associated with 6.4–20.2% and 20.7–42.7% increases in spring wheat yields, respectively. Overall, the results of these analyses highlight the value of applying biochar to improve soil quality and boost crop yields proximal to the study site. This study provided the scientific basis for the rational fertilisation and scientific management of biochar combined with nitrogen fertiliser in the irrigation area of Northern Xinjiang, China. |
Comparison of selected data acquisition models using on-farm production records on qualitative parameters of oocytes in dairy cowsOriginal PaperLudìk Stádník, Veronika Kinterová, Jiøí ©ichtaø, Jaromír Ducháèek, Matú¹ Ga¹parík, Lucie Nìmcová, Radek Procházka, Radim CodlCzech J. Anim. Sci., 2024, 69(1):1-10 | DOI: 10.17221/156/2023-CJAS Dairy cows enter the negative energy balance in the early post-partum period, which negatively affects milk yield, health status and reproduction. This study aimed to determine if milk yield (MY) and fat/protein (F/P) ratio could be used as reliable indicators for predicting the quality of aspirated oocytes and their further use for in vitro fertilisation. A secondary goal was to compare different periods before oocyte aspiration to determine which period had the most significant impact on the oocyte development in donor cows. All tested Holstein cows were at their first lactation (n = 68). The first ultrasound-guided follicular aspiration in donor cows was done on average at 58.7 days in milk (DIM). Usually, a second aspiration followed a week later if no problems were detected. In total, 102 aspirations were performed. Three model equations with different F/P ratio distributions and variants of MY production were tested in statistical evaluation. On average, 3.6 oocytes were retrieved per donor per aspiration, with a minimum of 1 and a maximum of 12. The maturation rate was 62.2%, with a high probability of reaching metaphase II (90.45%). The highest number of oocytes was obtained from low-yielding cows with a low F/P ratio in all evaluated periods (P < 0.01). The quality and expansion of cumulus-oocyte complexes were unaffected by the metabolic status. However, a tendency for better quality oocytes in donors with lower MY and F/P ratios was observed in all models. Our preliminary results showed that the prediction of oocyte quality in a homogeneous group of the first-lactation cows was related to the chosen data acquisition model. Data about milk yield and F/P ratio obtained from on-farm systems provide a valuable source of information for the selection of oocyte donors. |
Assessing soil aggregate stability by measuring light transmission decrease during aggregate disintegrationOriginal PaperMikulá¹ Madaras, Robert Krejèí, Markéta MayerováSoil & Water Res., 2024, 19(1):25-31 | DOI: 10.17221/78/2023-SWR Advancements in technology have recently enabled to assess soil aggregate stability (SAS) using digital devices. To address the need for a faster and more efficient method of measuring SAS, we have developed a simple yet effective approach using a specialized device. The innovative method named SlakeLight involves measuring the changes in light transmittance as aggregates undergo slaking. The device consists of the measuring chamber, which is placed on a LED light source with a surface-homogeneous distribution of luminosity. During the disintegration process of aggregates immersed in water, reduction in the light emitted to the photodiodes is proportional to SAS. The functionality of the device was tested using topsoil samples from two field fertilization trials. The recorded SAStrans values were compared with the wet sieving method (WSA) and SLAKE test. The new method showed a strong correlation with both reference methods (r = 0.89 for WSA, r = –0.86 for SLAKE). The device was able to detect a statistically significant differences in SAS between the grassland and the cropland at both sites. Although differences in SAStrans were not significant between different fertilization treatments unlike WSA, the simplicity and speed of the measurement increase the potential of the method for practical implementation in agriculture, surpassing the limitations of traditional and labor-intensive laboratory techniques. |
Study on parameters affecting vibration in height adjustment of a combine harvester header modelOriginal PaperKittikhun Prasertkan, Prathuang Usaborisut, Krittatee Jindawong, Kiatkong Suwannakij, Anusorn IamrurksiriRes. Agr. Eng., 2024, 70(2):92-103 | DOI: 10.17221/53/2023-RAE In Thailand, vibration problems often occur with rice combine harvester automatic header height adjusting systems. This study aimed to identify parameters for reducing the vibration and managing response time for harvesting speed configuration. An experimental combine harvester header model was designed to automatically adjust three parameters: total movement time, time ratio, and final phase distance within vertical movement ranges of 200, 250, or 300 mm. These parameters were controlled using a proportional flow control valve and a professional learning community (PLC) control unit. The results showed that increased time ratio, final phase distance, and total movement time significantly reduced average vibration amplitude. Higher time ratios corresponded to lower vibration amplitude during changing stages but higher amplitude during stopping stages. Vibration amplitudes during starting, changing, and stopping stages ranged from 0.622 to 1.373 mm, 0.042 to 1.097 mm, and 0.132 to 0.902 mm, respectively, for 200, 250, and 300 mm vertical movement distances. To reduce vibration in the first and second wave phases, precise control of start and final speeds through time ratio and total movement time was necessary. Minimizing the time ratio and final phase distance effectively reduced vibration amplitude in the third wave phase. |
Evaluating the indicators of a heart rate variability analysis in dogs using Poincaré plotsOriginal PaperT Kimura, S Shimamura, H Sakaya, T Hayashi, A Umemoto, K Sakai, M Yamasaki, T Hasegawa, T ShimadaVet Med - Czech, 2024, 69(2):42-51 | DOI: 10.17221/49/2023-VETMED Heart rate variability analyses using Poincaré plots can be useful for evaluating the autonomic nervous system function. However, the interpretation of the quantitative indicators of Poincaré plots remains controversial. Thus, few studies have verified the effectiveness of the quantitative indicators in veterinary medicine. This study aimed to verify the reliability of Poincaré plot indicators using pharmacological models in dogs. Four healthy beagles were used in this study. Each dog was treated with propranolol, atropine, and propranolol–atropine to block the sympathetic, parasympathetic, and sympathetic–parasympathetic functions, respectively. The quantitative indicators of the Poincaré plots were calculated based on data from 300 electrocardiogram beats collected before and after the administration of each drug and statistically analysed. The quantitative indicators of the Poincaré plots, such as the standard deviation perpendicular to the major axis (SD1), standard deviation along the major axis (SD2), and SD1 × SD2, significantly decreased after the drug administration in both the parasympathetic and sympathetic–parasympathetic blockade models. However, no significant differences were observed in SD1/SD2 between the groups. The Poincaré plots reflected the changes in the autonomic nervous system of dogs. In dogs, SD1, SD2, and SD1 × SD2 can detect a state in which parasympathetic nerve activity is suppressed. |
Old Juniper Troll stand – The oldest shrub population from ScandinaviaOriginal PaperJiøí Lehejèek, Matìj Roman, Martin Lexa, Paul Eric Aspholm, Jiøí Ma¹ekJ. For. Sci., 2024, 70(4):176-184 | DOI: 10.17221/118/2023-JFS
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The bioactive compounds of sweet cherry fruits influenced by cultivar/rootstock combinationOriginal PaperMaja Kazazic, Emina Mehic, Jasmina Aliman, Maida Djapo-LavicHort. Sci. (Prague), 2024, 51(1):23-28 | DOI: 10.17221/47/2023-HORTSCI This paper investigates the effect of rootstock (Gisela 6, PiKu 1 and SL 64) on the total phenol content, total anthocyanin content, the content of the individual phenols and the antioxidant activity in fruits of two sweet cherry cultivars, ‘Kordia’ and ‘Regina’. The total phenolic content determined by the spectrophotometric method using Folin-Ciocalteu reagent varied from 34.84 to 149.28 to mg GAE/100 g FW depending on the cultivar/rootstock combination. The concentration of total anthocyanins was determined by using the pH-differential method and it ranged from 0.46 to 11.54 mg CGE/100 g FW. Highest level of the total phenolic content and concentration of the total anthocyanins content was detected in the cultivar ‘Regina’ grafted onto the Gisela 6 rootstock. Neochlorogenic acid, catechin, chlorogenic acid and quercetine-3-O-glucoside were detected using HPLC method. Significant variation of detected individual polyphenols in sweet cherry fruits grafted on different rootstocks was observed. The lowest content of individual polyphenols was measured in ‘Regina’ cultivar grafted on the SL 64. Ferric reducing antioxidant power assay indicated that all investigated fruits possessed similar antioxidant activity. There was a statistically significant correlation observed between the total phenolic content and antioxidant activity (correlation coefficient 0.972, P-value below 0.01), as well as between the anthocyanins and antioxidant activity (correlation coefficient 0.855, P-value below 0.01). |
The effect of various factors (light, temperature, salt, and drought) on germination of Bromus sterilis L.Original PaperKateøina Hamouzová, Jaromír ©uk, Soham Bhattacharya, Jakub Mikulka, Veronika Valièková, Michaela Koláøová, Josef SoukupPlant Soil Environ., 2024, 70(5):287-295 | DOI: 10.17221/21/2024-PSE Bromus sterilis L. (barren brome) is one of the most economically important noxious grass weeds in the winter cereal fields of Europe. Its ecological behaviour in this agro-climatic region should be assessed for effective weed control strategies. The present study was conducted to assess the dormancy and germination response of the B. sterilis population from the Czech Republic under thermal, light, and stress conditions. The dormancy loss experiment revealed that seeds exposed to the light regime showed a remarkably lower percentage of germination, and under alternating temperatures of 10/20 °C in dark conditions, rapid loss of primary dormancy was observed. This population was found to germinate across a wide temperature range of 5–35 °C, with the highest germination rate at 25 °C (T50 = 1.14 days in dark, 1.21 days in light) and the germination time increased with decreasing temperatures below 25 °C. Further, due to fitness advantage, herbicide-resistant (R) biotypes were found to be more stress-tolerant than susceptible (S) biotypes under salinity and drought conditions. In the highest stress conditions, the germination of S biotypes was negligible, while R biotypes can germinate under high stress, but germination decreased below 25 °C. The current findings may add value to effective weed control strategies using prediction models based on seed dormancy and germination values under different hydrothermal conditions. |
Digital economy and rural household resilience: Evidence from ChinaOriginal PaperJianghong Xu, Chenguang Wang, Xukang Yin, Weixin WangAgric. Econ. - Czech, 2024, 70(5):244-263
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