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Sources of fungal infection of winter wheat grain in the forest-steppe of Samara region 萨马拉地区森林草原冬小麦谷粒的真菌感染源
Agrarian science Pub Date : 2024-03-25 DOI: 10.32634/0869-8155-2024-380-3-119-123
M. Kincharova, A. I. Kincharov, M. Abdryaev
{"title":"Sources of fungal infection of winter wheat grain in the forest-steppe of Samara region","authors":"M. Kincharova, A. I. Kincharov, M. Abdryaev","doi":"10.32634/0869-8155-2024-380-3-119-123","DOIUrl":"https://doi.org/10.32634/0869-8155-2024-380-3-119-123","url":null,"abstract":"Relevance. Among the pathogenic microflora of cereals, seed infection occupies the most important place, in this regard, the search for any ways to reduce it is very relevant.Methods. The research was conducted at the VSRISSG — Branch of SamSC RAS on seeds of 3 varieties of winter soft wheat of 2020 harvest, selected at different stages of harvesting and post-harvest grain processing: from ears before harvesting, from the harvested crop from under the combine and after grain processing on the seed cleaning machine Petkus К-531. Seed infestation was determined according to GOST 12044-93. After identification of phytopathogenic fungi, their percentage frequency of occurrence and relative abundance were calculated.Results. Seed infestation after combine harvesting increased for all varieties on average by 9.2%, and after grain treatment on Petkus — by 6.2% compared to seeds sampled from ears. The saturation of crop rotations with cereals from 30 to 50% lead to an 8.7% decrease in the number of healthy seeds in the samples (from 37.0 to 28.3%). Seeds were most often infected by fungi causing moulds with the frequency of occurrence from 32.9 to 39.1% and relative prevalence from 40.8 to 55.2% depending on the stage of harvesting. Moreover, the content of this group of mushrooms decreased during harvesting (compared with grain from ears) by 6.2% after harvesting by a combine harvester and by 3.4% after grain processing. During combine harvesting, the frequency of occurrence of fungi Fusarium sp. and Alternaria sp. it increased by 4.7–4.8% on seeds, and after cleaning it decreased again, but it was still 1.5–2.4% higher than on seeds from ears.","PeriodicalId":7465,"journal":{"name":"Agrarian science","volume":" 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140382075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of bioequivalence of veterinary drugs “Pinpramil” and “Milbemax” in dogs 犬用兽药 "平吡美 "和 "米尔贝美 "的生物等效性研究
Agrarian science Pub Date : 2024-02-20 DOI: 10.32634/0869-8155-2024-379-2-38-43
S. V. Abramov, A. V. Balyshev, V. V. Golovin, P. P. Kochetkov, M. S. Zhuravleva, B. V. Violin
{"title":"Study of bioequivalence of veterinary drugs “Pinpramil” and “Milbemax” in dogs","authors":"S. V. Abramov, A. V. Balyshev, V. V. Golovin, P. P. Kochetkov, M. S. Zhuravleva, B. V. Violin","doi":"10.32634/0869-8155-2024-379-2-38-43","DOIUrl":"https://doi.org/10.32634/0869-8155-2024-379-2-38-43","url":null,"abstract":"The article presents the results of studying the bioequivalence of the reproduced drug “Pinpramil” in comparison with the reference drug “Milbemax”. The experiments were conducted on 12 dogs, which were divided into two equal groups of 6 animals each. Dogs of one of the groups were given a reproduced drug, and animals of the other group were given a reference drug. The studied drugs were injected into the body of dogs once, individually, orally at a dose of the active substance, which corresponded to 0.5 mg of milbemycin oxime and 5 mg of praziquantel per 1 kg of body weight. After administration of the drugs, blood samples were taken from animals 14 times within 96 hours for subsequent production of serum, in which the content of praziquantel (including its active metabolite, trans-4-hydroxypraziquantel) and milbemycin oxime were determined by high-performance liquid chromatography. The obtained concentrations of these substances served as the basis for calculating their pharmacokinetic parameters in the body of dogs. The statistical analysis showed that the two-way confidence intervals for the Cmax, AUC0-t, AUC0-∞ ratios were in the range of 80–125%, and the Cmax/AUC0-t ratios were 75–133%. Thus, the research results have demonstrated that the drugs “Pinpramil” and “Milbemax” are bioequivalent.","PeriodicalId":7465,"journal":{"name":"Agrarian science","volume":"61 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140445389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of ultrafine particles of copper and iron on the intestinal microbiocenosis of broiler chicken 超细铜和铁颗粒对肉鸡肠道微生物生态的影响
Agrarian science Pub Date : 2024-02-20 DOI: 10.32634/0869-8155-2024-379-2-61-65
O. Kvan, E. A. Sizova, I. A. Vershinina
{"title":"Influence of ultrafine particles of copper and iron on the intestinal microbiocenosis of broiler chicken","authors":"O. Kvan, E. A. Sizova, I. A. Vershinina","doi":"10.32634/0869-8155-2024-379-2-61-65","DOIUrl":"https://doi.org/10.32634/0869-8155-2024-379-2-61-65","url":null,"abstract":"Relevance. Studying the bacterial diversity of the intestine under the influence of various factors makes it possible to study changes in the qualitative and quantitative composition under the influence of various factors.Methods. In our work, we studied the bacterial profile of samples of the contents of the cecum of broiler chickens. To assess the effect of ultrafine particles of Cu and Fe on the metabolism in the body of animals fed a semi-synthetic diet, 120 heads of one-week-old broiler chickens were selected, which were divided into 4 groups (n = 30) using the analog pair method. During the experiment, all birds were under the same housing and feeding conditions. The duration of the experiment was 28 days. To solve the problems, broiler chickens were used, which were supplemented with ultrafine Cu and Fe particles in their diet in order to study their effect on the microbiocenosis of the poultry digestive system. Using the analogue pair method, four groups of 30 broiler chickens each at the age of 7 days were formed. During the study, housing and feeding conditions were identical for all groups. The study was conducted over 4 weeks. For feeding, we prepared a semi-synthetic diet (K1) and a semi-synthetic diet, deficient in microelements, modified by us (K2).Results. The use of ultrafine copper and iron particles has been shown to alter the intestinal bacterial community of broiler chickens. Thus, based on the data, we can conclude that obligate bacteria in the cecum of birds can modulate the level of accumulation of chemical elements in the bird’s body when various substances are introduced. According to the data obtained, ultrafine iron particles made it possible to maintain the normal diversity of the digestive microbiota of poultry, which was expressed, among other things, in a decrease in the number of representatives of the Enterobacteriaceae family, which includes representatives of pathogenic and opportunistic taxa, while the introduction of ultrafine copper particles contributed to an increase in the number of representatives of this family.","PeriodicalId":7465,"journal":{"name":"Agrarian science","volume":"61 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140445506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluation of effectiveness and optimisation of the process of fermentation of oat drink with lactic acid microorganisms 用乳酸微生物发酵燕麦饮料的效果评估和工艺优化
Agrarian science Pub Date : 2024-02-20 DOI: 10.32634/0869-8155-2024-379-2-127-132
N. Popova, I. Kalinina, A. K. Vasiliev, K. S. Kameneva
{"title":"Evaluation of effectiveness and optimisation of the process of fermentation of oat drink with lactic acid microorganisms","authors":"N. Popova, I. Kalinina, A. K. Vasiliev, K. S. Kameneva","doi":"10.32634/0869-8155-2024-379-2-127-132","DOIUrl":"https://doi.org/10.32634/0869-8155-2024-379-2-127-132","url":null,"abstract":"Relevance. The development of lactose-free probiotic products has recently attracted the attention of many scientists. Such products are especially interesting for people with individual characteristics of the body, in particular intolerance to the chemical components of milk, or their own food preferences. As a food system for obtaining a probiotic product, plant-based drinks are increasingly being used: oatmeal, rice, soy almond and others. Plant-based drinks provide a range of nutrients, and fermentation processes using lactic acid microorganisms can enrich them with functional ingredients such as probiotics.The purpose of the study is to evaluate the possibility of fermentation of oatmeal drink by strains of probiotic lactic acid microorganisms and to search for optimal modes of this process.Methods. Fermentation of a non-alcoholic beverage from vegetable raw materials “Oat milk” was carried out using a starter culture Danisco Choozit MA 11 25 DCU, including Lactococcus lactis subsp. Lactis, Lactococcus lactis subsp. Cremoris. The efficiency of the process was assessed by the accumulation of biomass, titratable and active acidity, lactic acid accumulation, and the most likely number of probiotic microorganisms. Additionally, the influence of the functional component — routine — on the activity of changes in these indicators was assessed.Results. The possibility of adaptation of lactic acid bacteria in the plant environment of an oat drink was established, the addition of rutin contributed to the activation of the fermentation process. The increase in the biomass of lactic acid bacteria without the introduction of rutin was 150%, and when applied — 230%. The variation of the temperature factor during fermentation of the drink for 12–20 hours allowed us to establish the optimum for the accumulation of lactic acid — 16 hours at a temperature of 34.7 °C. The number of probiotic microorganisms in the finished drink was 3.8–5.2 × 107, which makes it possible to classify drinks as functional products with probiotics. Thus, the research results confirm the possibility of using an oat-based vegetable drink for fermentation by lactic acid bacteria Lactococcus lactis subsp. Lactis, Lactococcus lactis subsp. cremoris. The research was carried out with the financial support of a grant from the Russian Science Foundation (RGNF) within the framework of the project 23-26-10063.","PeriodicalId":7465,"journal":{"name":"Agrarian science","volume":"50 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140445818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Features of the formation of yield and quality of durum spring wheat in the conditions of the Chuvash Republic 楚瓦什共和国条件下硬质春小麦产量和质量形成的特点
Agrarian science Pub Date : 2024-02-20 DOI: 10.32634/0869-8155-2024-379-2-87-91
A. Lozhkin, O. A. Vasiliev, V. Dimitriev, O. V. Kayukova, M. I. Yakovleva
{"title":"Features of the formation of yield and quality of durum spring wheat in the conditions of the Chuvash Republic","authors":"A. Lozhkin, O. A. Vasiliev, V. Dimitriev, O. V. Kayukova, M. I. Yakovleva","doi":"10.32634/0869-8155-2024-379-2-87-91","DOIUrl":"https://doi.org/10.32634/0869-8155-2024-379-2-87-91","url":null,"abstract":"Relevance. The main areas of durum wheat cultivation are located in the regions of the Lower and Middle Volga region, the southern Urals and the southern regions of Siberia. The Chuvash Republic is not a traditional region for the cultivation of spring durum wheat. The development of varietal technologies that take into account the adaptive potential of the crop, taking into account the soil and climatic conditions of the region, is especially relevant for expanding the area of cultivation of this crop.Methods. To conduct research in the conditions of the Chuvash Republic, a single-factor experiment was carried out in six repetitions with five varieties of spring durum wheat: Bezenchukskaya 139, Bezenchukskaya zolotistaya, Luch 25, Kargala 223, Annushka. Records and observations were carried out according to the methods of state variety testing.Results. The highest tillering indicators were noted in the standard variety, where the indicators of general and productive tillering were 1.8 and 1.7, respectively, and in the Luch 25 variety — 1.9 and 1.6 respectively. The largest number of productive stems for harvesting was formed by varieties of the Bezenchuk selection, the lowest indicator — 458 pcs. per 1 sq. m was shown by the Kargal variety 223. The best indicators of the yield structure on average for two years should be noted in the varieties Bezenchukskaya 139 and Bezenchukskaya zolotistaya. The lowest indicators on the structure of the crop are noted in the varieties Kargala 223 and Annushka. The most full-weight grain on average for two years was formed by the varieties Luch 25, where the mass of 1000 grains was 42.9 g, Annushka — 42.4 g, Bezenchukskaya zolotistaya — 40.9 g. The highest yield was provided by the varieties Bezenchukskaya (139–3.41 t/ha) and Bezenchukskaya zolotistaya (3.19 t/ha).","PeriodicalId":7465,"journal":{"name":"Agrarian science","volume":"216 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140446010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The use of chemical and biological preparations on potatoes as a preplant treatment of tubers 使用化学和生物制剂对马铃薯块茎进行播种前处理
Agrarian science Pub Date : 2024-02-20 DOI: 10.32634/0869-8155-2024-379-2-102-106
F. F. Puzdrya, A. V. Bozhenkov, S. A. Kruglova, T. M. Morozova, G. V. Popovа
{"title":"The use of chemical and biological preparations on potatoes as a preplant treatment of tubers","authors":"F. F. Puzdrya, A. V. Bozhenkov, S. A. Kruglova, T. M. Morozova, G. V. Popovа","doi":"10.32634/0869-8155-2024-379-2-102-106","DOIUrl":"https://doi.org/10.32634/0869-8155-2024-379-2-102-106","url":null,"abstract":"Relevance. In the potato industry, the use of biological techniques has become widespread to improve the quality of the seed material of tubers, reduce the incidence and damage of potato pests.Methods. Studies on the effectiveness of the use of biological and chemical techniques on potatoes were carried out at the experimental field of the Kostroma Research Institute of Agricultural Research — a branch of the A.G. Lorch Potato Research Center in 2021–2022.The purpose of the work is to identify the effectiveness of the use of the biological drug “BisolbiSan”, the intake of ozonation and the chemical fungicide “Maxim” on the yield and quality of potatoes in the Kostroma region.Results. The evaluation of the use of drugs as a pre-planting treatment of tubers on potatoes of the Favorit variety was carried out. With the combined use of “BisolbiSan” biologics and ozone, the greatest reliable increase in tuber weight from the bush was obtained at 177 g, which is 30.8% more than in the control version. When processing tubers with the chemical mordant «Maxim», the weight increase was 20.5% compared to the control. In all variants, a significant increase in the number of tubers (from 1.5 to 2.6 pcs/bush) was obtained compared with the control variant. The largest number of tubers from the bush (9.1 pcs.) was obtained by joint processing — «BisolbiSan» + ozone. The highest yield of the seed fraction in the amount of 13.8% was achieved when processing tubers with the «Maxim» mordant, which exceeded this indicator by 3.7% in the control version. The joint pre-treatment of tubers with “BisolbiSan” and ozone provided the highest yield of a large fraction (81.9%), while the treatment of tubers with the “Maxim” mordant produced the lowest indicator of all studied options (76.8%).","PeriodicalId":7465,"journal":{"name":"Agrarian science","volume":"101 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140448328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The influence of individual elements of agricultural technology on the productivity of durum wheat in the southern forest-steppe of the Omsk region 农业技术的各个要素对鄂木斯克州南部森林草原硬粒小麦产量的影响
Agrarian science Pub Date : 2024-02-20 DOI: 10.32634/0869-8155-2024-379-2-81-86
Yu. V. Frizen, E. V. Nekrasova, A. A. Gaivas
{"title":"The influence of individual elements of agricultural technology on the productivity of durum wheat in the southern forest-steppe of the Omsk region","authors":"Yu. V. Frizen, E. V. Nekrasova, A. A. Gaivas","doi":"10.32634/0869-8155-2024-379-2-81-86","DOIUrl":"https://doi.org/10.32634/0869-8155-2024-379-2-81-86","url":null,"abstract":"Relevance. For the manufacture of high-quality pasta, durum wheat grain is used. Improving the productivity of hard spring wheat is an urgent task. The formation of a powerful root system is the key to the full supply of nutrients and plastic substances to the plant. Increased productivity, the number of spikebearing shoots. Plants become more resistant to adverse environmental factors, which is important for spring durum wheat, which is more demanding than spring soft wheat. The timing of sowing and especially the application of mineral fertilizers are a significant factor affecting not only the formation of individual elements of the crop structure, which subsequently form the productivity of plants, but also the formation of the root system. To do this, it is necessary to choose the optimal sowing time, at which the critical phases of plant development fall under the most favorable agrometeorological conditions and the formation of the most powerful root system.Results. The conducted studies allow us to recommend the most optimal terms of sowing and the use of fertilizers to ensure the efficiency of growing durum spring wheat. In dry conditions, when sowing crops without applying fertilizers, sowing in the second ten days of May is most effective. If it is possible to apply nitrogen fertilizers and nitrogen-phosphorus fertilizers, it is better to sow durum spring wheat in the second and third decades of May.","PeriodicalId":7465,"journal":{"name":"Agrarian science","volume":"75 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140447435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Verification of a test system for detecting antibodies to bovine diarrhea virus using the enzyme immunoassay method “Cattle VD - SEROTEST plus” 验证使用酶免疫测定法 "牛 VD - SEROTEST plus "检测牛腹泻病毒抗体的测试系统
Agrarian science Pub Date : 2024-02-20 DOI: 10.32634/0869-8155-2024-379-2-48-52
T. Lobova, V. Mikhailova, A. Skvortsova, M. Shishkina
{"title":"Verification of a test system for detecting antibodies to bovine diarrhea virus using the enzyme immunoassay method “Cattle VD - SEROTEST plus”","authors":"T. Lobova, V. Mikhailova, A. Skvortsova, M. Shishkina","doi":"10.32634/0869-8155-2024-379-2-48-52","DOIUrl":"https://doi.org/10.32634/0869-8155-2024-379-2-48-52","url":null,"abstract":"Relevance. Agricultural enterprises of the Russian Federation with intensive livestock farming are annually faced with the problem of a respiratory-intestinal nature, especially in young animals. This entails large losses. As a result of problems arising in animals, viral diarrhea of cattle occupies one of the leading places. The urgency of the problem lies in the large economic damage that occurs due to the birth of non-viable offspring, the death of newborn young animals, the development of various forms of pneumonia, decreased productivity, dysfunction of animal reproduction, as well as the costs of carrying out preventive, quarantine and liquidation measures. Reliable laboratory diagnostics allows you to correctly build a strategy to combat the disease. The article presents the results of verification of a test system for detecting antibodies to bovine diarrhea virus using the enzyme immunoassay method “Cattle VD — SEROTEST plus”.Methods. The diagnostic significance of the test system was assessed according to the indicators of sensitivity, specificity and precision under conditions of repeatability and reproducibility.Results. The coefficient of variation (CV) for the enzyme-linked immunosorbent assay ranged from 1.9 to 11.2%, indicating good consistency of results with intra-laboratory precision under conditions of repeatability and reproducibility.","PeriodicalId":7465,"journal":{"name":"Agrarian science","volume":"343 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140448070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Improving the efficiency of using tractors by equipping the drive wheels with a built-in differential 为驱动轮配备内置差速器,提高拖拉机的使用效率
Agrarian science Pub Date : 2024-02-20 DOI: 10.32634/0869-8155-2024-379-2-113-119
Yu. F. Kazakov, V. Batmanov, Yu. V. Konstantinov, P. V. Zaitsev
{"title":"Improving the efficiency of using tractors by equipping the drive wheels with a built-in differential","authors":"Yu. F. Kazakov, V. Batmanov, Yu. V. Konstantinov, P. V. Zaitsev","doi":"10.32634/0869-8155-2024-379-2-113-119","DOIUrl":"https://doi.org/10.32634/0869-8155-2024-379-2-113-119","url":null,"abstract":".Relevance. The efficiency of the use of agricultural wheel units, the process of interaction of the wheel mover with the support surface is influenced by structural parameters, the properties of the support surface and the tire tread, the ratio of vertical load and longitudinal pushing force. In order to reduce wheel slipping, a built-in differential with an off-center application of external knobs and a driving torque is proposedMethods. For a quantitative and qualitative description of the operation of the wheel, methods of analytical, comparative, information-logical and system analysis of factors that have a causal relationship with the performance of mobile units, wheel propellers were used. The analysis of the propeller operation was carried out by the methods of theoretical mechanics on the provisions of the theory of rolling of a deformable wheel on a deformable supporting surface. The subject of the study is a two-stage process of interaction between the surface and the drive wheel during acceleration. At the first stage, the sprung mass of the tractor moves with a stationary wheel rim within its radius. At the second stage, the movement of the tractor masses occurs with a rotating wheel, the wheel gear operates in differential mode, preventing its external slip.Results. The wheel differential contributes to maintaining the maximum value of the friction coefficient and the rational ratio of the driving moment and the moment of resistance to rolling. The use of a built-in differential in wheel propellers is a promising option for their improvement, it helps to maintain a high specific longitudinal reaction, preventing slipping and, thereby, destruction of the soil structure. As a result, the productivity of wheeled mobile units increases, fuel consumption and tire wear decrease, soil compaction decreases.","PeriodicalId":7465,"journal":{"name":"Agrarian science","volume":"82 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140446930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Meat qualities of crossbred young pigs 杂交幼猪的肉质
Agrarian science Pub Date : 2024-02-20 DOI: 10.32634/0869-8155-2024-379-2-71-75
A. Belookov, M. Rebezov, S. S. Stvolov
{"title":"Meat qualities of crossbred young pigs","authors":"A. Belookov, M. Rebezov, S. S. Stvolov","doi":"10.32634/0869-8155-2024-379-2-71-75","DOIUrl":"https://doi.org/10.32634/0869-8155-2024-379-2-71-75","url":null,"abstract":"Relevance. Interbreeding and hybridization are important factors in increasing pig productivity. As a result of the heterosis effect, the multiplicity of sows increases, the safety of offspring increases, the growth rate of young animals improves, the quality of meat improves and, as a result, the profitability of the pig industry increases.The paper presents an assessment of the meat qualities of local young pigs obtained as a result of industrial three-breed crossing.Methods. To implement the scientific and economic experience, three groups of sows of pairs of analogues of a large white breed from the Hypor company (KB Hypor) were formed. Sows of the 1st group were crossed with boars of the Landrace breed from the PIC company (Landrace Pic), the 2nd — with boars of the Landrace breed from the Genesus Genetics company (Landrace Genesus), the 3rd — with boars of the Landrace breed from the Hypor company (Landrace Hypor). As a result, two-breed crossbreeds (F1) were obtained. Next, crossbred sows (F1) of the 1st, 2nd and 3rd experimental groups were crossed with boars of the Duroc breed from Genesus Genetics, as a result, commercial young (F2) were obtained.Results. According to the research results, it was found that the highest pre-slaughter live weight was obtained from animals of the 1st group (125.12 kg), which is more than in the 2nd and 3rd experimental groups, respectively, by 5.8% and 4.0%. Studies of the chemical composition of the longest back muscle of young pigs showed that the protein content in all meat samples was in the range of 23–24% with a minimum value (23.31%) in the muscle tissue of animals of the 3rd experimental group, and the maximum (23.7%) in the 1st experimental group (the difference was 0.39%). The amount of intramuscular fat in the meat of animals of the 1st (5.57%) and 2nd (6.30%) groups was significantly higher by 1.23% and 1.96%, respectively, compared with analogues of the 3rd group. The minimum pH level of meat was noted in the 1st experimental group (5.51 pH units), the maximum — in the 2nd experimental group (5.56 pH units), the difference was 0.05 pH units. The largest mass fraction of collagen (1.11%) was obtained in the 3rd group, the smallest — in the 1st experimental group (0.66%), the difference was 0.45%.","PeriodicalId":7465,"journal":{"name":"Agrarian science","volume":"75 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140446936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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