Изучили репродуктивные функции коров в зависимости от молочной продуктивности и количества лактаций путем регулярных гинекологических обследований, а так же причины и характер нарушений. Установлено, что нарушения воспроизводительной функции коров увеличиваются с ростом молочной продуктивности, максимально осложняясь у 43 коров 6 и более лактаций, а продолжительность сервиспериода достигает 145 дней при средних значениях индекса осеменения 3,2. У коров по 1 и 2 лактации частота репродуктивных осложнений составляет в среднем 21. Анализ материалов исследований по состоянию репродуктивной активности обследованных коров чернопестрой породы в условиях Республики Башкортостан показывает, что основной причиной снижения плодовитости является наличие гипофункции яичников, которая может составлять до 37,1, кист 15,2 в высокопродуктивных стадах и 34,5 персистентных желтых тел в низкопродуктивных. Применение комплекса биорегуляторов позволяет получать достаточно высокие показатели прихода коров в охоту от 74 до 91 животных от общего их числа. Наибольшие значения показателя плодотворного осеменения (до 75) были установлены у коров по 3 и 4 лактациям. Обследование выявило, что увеличение молочной продуктивности приводит к увеличению нарушений воспроизводительной функции. По нашим данным, в высокопродуктивных стадах диагностировано гинекологически больных коров в 2,1 раз больше, чем в низкопродуктивных.Reproductive functions of cows depending on milk productivity and the number of lactation periods, as well as the reasons of reproductive impairments, were studied using regular gynecological examinations. It was found that reproductive function impairment in cows is increased with the growth of milk productivity with the complication reaching maximum in 43 of cows for 6 and more lactation, and the length of the service period amounts to 145 days with the average value of insemination index being equal to 3.2. During lactation periods up to 1 and 2 the average frequency of reproductive impairment in cows is 21. The analysis of research materials concerning reproductive activity of examined cows of blackandwhite breed in the conditions of the Republic of Bashkortostan shows that the main reason of decrease in breeding performance lies in the presence of ovary hypofunction which can amount to 37.1, cysts 15.2 in highly productive herds, and 34.5 of persistent yellow bodies in those with low productivity. The use of bioregulator complexes allows achieving rather high values of cows coming in heat from 74 to 91 of animals from the total quantity. The highest values of successful insemination (up to 75) were registered in cows during lactation periods 3 and 4. Examination found that improvement of milk productivity leads to the increase in reproductive function impairment rate. According to our information, the number of cows with gynecological diseases in highly productive herds was higher than in those with low productivity by 2.1 times.
В условиях племрепродуктора в Республике Башкортостан были проведены опыты по изучению влияния селеносодержащего препарата ДАФС-25 на рост и мясную продуктивность бычков симментальской породы. В опытной группе животные характеризовались более высокой интенсивностью обменных процессов. Они превосходили по содержаниюбелка в крови бычковконтрольнойгруппы, где разницасоставила в 3 мес 0,9 г/л (1,17), в 6 мес 1,41 г/л (1,84), в 12 мес 1,54 г/л (1,99), в 18 мес 1,18 г/л (1,51). Установлено, что у животных, получавших добавку, активность ферментов АСТ и АЛТ была выше, чем в контроле, соответственно, на 0,100,22 ед. (2,7013,74), что положительно отразилось на интенсивности формирования мясной продуктивности. Лучшей энергией роста в течение опыта обладали бычки опытной группы, они имели преимущество по живой массе к концу опыта 23,7 кг (7,4). Бычки опытной группы превосходили аналогов из контроля по живой массе в возрасте 3, 6, 9,12, 15 месна 2,2 кг (2,56), 6,1 (4,25), 11,9 (5,74), 15,2 (5,42), 17,2 кг (5,13). Результаты контрольного убоя свидетельствовали, что скармливание ДАФС-25 бычкам опытной группы способствовало интенсивному увеличению живой массы и мясной продуктивности. Масса парной туши у бычков 18-месячного возраста опытной группы была на 14,28 кг (6,96) выше, чем в контроле внутреннего жира на 1,95 кг (21,33), убойной массы на 16,23 кг (7,57). У животных опытной группы убойный выход был выше на 1,05, по сравнению с бычками контрольной группы. У бычков, получавших подкормку, масса мякоти была больше на 20,31 кг, что составляет 13,05 (Р0,001). Туши животных опытной группы характеризовались лучшим соотношением в них мяса, жира и костей. Мякоти на 1 кг костей приходилось 4,56 кг, или на 0,23 кг (5,31) больше, чем в контроле.Research directed at studying the influence of selenium-based feed additive, DAFS-25, on the growth and meat productivity in calf bulls of Simmental breed was carried out under the conditions of a pedigree breeding unit located in the Republic of Bashkortostan. The animals included in the test group was characterized by increased intensity of metabolic processes. The level of blood protein of animals from this group exceeded the level of blood protein of animals from control group. The differences at the age of 3 months amounted to 0.9 g/L (1.17), 6 months 1.41 g/L (1.84), 12 months 1.54 g/L (1.99), 18 months 1.18 g/L (1.51). It was found that the activity of AST and ALT enzymes in animals that received the additive was higher by 0.10-0.22 u (2.70-13.74), respectively, than that in animals included in control group, which positively influenced the intensity of meat productivity formation. Calf bulls from the test group showed the best growth energy during the experiment. Their live weight advantage by the end of the experiment amounted to 23.7 kg (7.4). Test group calf bulls were superior to the analogues belonging to control group by live weight: by 2.2 kg (2.56), 6.1 (4.25), 11.9 (5.74), 15.2 (5.42), and 17.2 kg (5.13) at the age of 3, 6, 9, 12, and 15 months. The results of control slaughter showed that feeding DAFS-25 to calf bulls belonging to test group facilitated intensive growth of live weight and meat productivity. Hot carcass weight of 18-month-old calf bulls belonging to test group by 14.28 kg (6.96) exceeded the result of control group test group animals also exceeded those from control group by the following parameters: internal fat by 1.95 kg (21.33), slaughter-weight by 16.23 kg (7.57). Slaughter yield of test group animals was higher by 1.05 compared to calf bulls attributed to control group. Flesh weight of calf bulls who received the additive was higher was 20.31 kg more, which amounts to 13.05 (P0.001). Carcasses of test group animals were characterized by better ratio of meat, fat, and bones. There was 4.56 kg of flesh per 1 kg of bones, or 0.23 kg (5.31) more than in control group.
The results of our own scientific research on the use of advanced technologies for the procurement, storage and use of voluminous forage prepared from legume-cereal grass mixtures, as well as silos preserved with new generation biological preparations Biosib and Biotrof-111 are presented. The ways and methods of improving the structure of sown areas during the cultivation of perennial legume-cereal grass mixtures with the inclusion of an unconventional forage crop - the eastern goat's rue are considered in order to increase the energy and protein nutritional value of voluminous forages. The possibility of using the energy feed additive Bergafat T-300 in winter rations for feeding highly productive fresh cows has been shown. The book can serve as a scientific and methodological guide for drawing up effective programs and long-term plans for the development of forage production and feeding of cattle.
One of the key areas of development of the cattle breeding industry in Russia is the creation of effective technological methods. They allow to carry out the improvement and establishment of new resource-saving systems for breeding young animals at an accelerated pace. It is essential to meet the modern requirements of meat production as an ecologically safe product. The aim of the research was to enhance the fattening qualities of Hereford bull calves while using mode-setting suckling of various ratios as an element of resource saving. The study was performed on "SAVA-Agro-Yapryk" OOO of the Tuymazinsky district of the Republic of Bashkortostan. The determination of the efficiency of the use of free and mode-setting suckling of various ratios made it possible to identify an effective method of raising young meat cattle. A three-fold mode suckling is used with separate keeping of young animals and mother cows. This makes it possible to keep the optimal microclimate parameters in the calf house, contributes to the rapid early adaptation of calves to the consumption of coarse feed and concentrates. It has a positive effect on the growth and development of calves and their meat productivity at the age of 18 months according to the parameters of removable fat mass, carcass mass and interior fat mass. All this promotes an increase in the sale of beef and an improvement in the level of production profitability to 13.93%.
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