ПРОБЛЕМИ СТАТЕВОЇ ЦИКЛІЧНОСТІ ТА ЗАПЛІДНЕННЯ ТЕЛИЦЬ І КОРІВ Г. С. ШАРАПА, О. В. БОЙКО Інститут розведення і генетики тварин імені М.В.Зубця НААН (Чубинське, Україна) boyko_lena@ua.fm У багаторічних дослідах на 5080 телицях і 8700 коровах молочних порід вивчали повноцінність статевих циклів і заплідненість тварин. У дослідах на 60 телицях встановлено, що середня тривалість тічки становить 49-51 год., а статевої охоти -12,3 год. при природньому паруванні телиць, 12,8 год. -при використанні бугая-пробника і 14,2 год. -при штучному осіменінні. Овуляція проходила відповідно через 10-12,3-14,9 годин після закінчення охоти, а заплідненість від першого осіменіння становила 86,3-79,0-73,7%. В умовах господарств заплідненість телиць була в межах 64,5-77,6%. Краще запліднювалися молодші за віком телиці при досягненні живої маси 350 кг. Повноцінні статеві цикли були в 83% телиць, а метрорагії виявлені в 25% тварин. У корів повноцінні статеві цикли були в 77% тварин, а заплідненість від першого осіменіння становила 48-61%. Метрорагія зафіксована в 29% корів з гіпофункціональними процесами в матці та яєчниках. Ключові слова: телиця, корова, порода, осіменіння, статевий цикл, запліднення, яєчник, гіпофункція, метрорагія PROBLEMS OF SEXUAL CYCLICITY AND FERTILIZATION OF HEIFERS AND COWS G. S. Sharapa, O. V. Boiko Institute of Animal Breeding and Genetics nd. a. M.V.Zubets of NAAS (Chubynske, Ukraine)In long-term experiments on 5080 heifers and 8700 cows of dairy breeds, they studied the usefulness of sexual cycles and the fertility of animals. In experiments on 60 heifers, it was found that the average duration of heat is 49-51 hours, and of sexual hunt -12.3 hours with natural pairing of heifers, 12.8 hours -using a bull-probe and 14.2 hours -with artificial insemination. Ovulation took place 10-12.3-14.9 hours after the end of the hunt, respectively, and the fertilization rate from the first insemination was 86. 3-79.0-73.7%. Under the conditions of farms, the fertility of heifers was within 64.5-77.6%. Younger heifers fertilized better when they reached a live weight of 350 kg. 83% of heifers had full sexual cycles, and metrorrhagia was found in 25% of animals.In cows 77% of animals had complete sexual cycles and the fertilization rate from the first insemination was 48-61%. Metrorrhagia was recorded in 29% of cows with hypofunctional processes in the uterus and ovaries.

Scientific and production experiments were carried out on cows of Ukrainian Black-and-White diary breed (UBAWD) of SE "Seagull" (branch "Lisne") during 2016–2017. The anatomical and physiological state of genital organs of cows was determined by the method of clinical and gynecological research of animals before conducting experiments and during them every 40–50 days. In total 486 cows were kept under control, which were kept in typical rooms with running platforms, but the active motivation of animals was clearly insufficient. Feeding cows according to the recommended standards. The milk yield from the cow in 2017 was 7813 kg. The experiments studied the effect of feeding cows during the dry period, the conditions of retention and some other paratypic factors on the course of the genera and the postnatal period, the duration of the service period and the fertility of cows. In analyzing the research results, personal records and veterinary documentation were used. In conducting experiments, it was found that normal calving was in 89% of cows, and severe and pathological – in 11% of cases. The main diseases in the afterlife period were: detention of the litter – 9.5%, postpartum endometritis – 21.5%, hypofunction of the ovaries – 23.0%, persistent yellow ovarian bodies – 25.6% and others. Normal intervals between stages of excitation of the sexual cycle (18–22 days) were in 63% of cows, and violations of the rhythm of sexual cycle, associated with dysfunction of the ovaries and missed the hunt – 30% of animals. Subunvulation of the genital organs of the cows contributed to the diseases of the limbs, udder and digestive disorders. During 2016–2017, the effect of feeding cows (173 g.) in the dry period on the course of calving, post-autumn period and their fertility was studied. Under the same conditions, keeping cows in the maternity ward and feeding rough and succulent feeds concentrated feeds fed cows of the control group (98 heads) to 1–2 kg daily during the dry period, and experimental (75 heads) – for 18–20 days to calving 2–3 kg. A positive difference was found in favor of cows of the experimental group: there was a more active stage of expulsion of the fetus, less delay of the placenta (by 7%) and endometritis (by 12%), the duration of the postoperative regenerative period decreased by 8.6 days; service period – 19.0 days; fertility from two inseminans was higher by 5.7%. Study of the reproductive capacity of cows at the hotel in different seasons showed that the recovery period was shorter by 11 days in the presence of cows in 3–4 quarters, and the service period – by 23.2 days at hotel in I and IV sq. The average duration of the recovery period was 79.5 days, while the service period was 123.4 days. The longest duration of the joint ventricle was in cows at hotel during the hot summer days of the year. The average fertilization rate from the first insemination of 339 cows was 44.9% with fluctuations in individual groups of milkers from 26.8% to 55.0%. The following indicators were in the number 1 and number 3 (respectively 26.8% and 31.4%). The best fertility rates were in groups № 4, 6 and 7, where there were more cows of the second and third lactation, and the responsible attitude of the milkers to work in organizing cows walks and sexually explicit hunting. When comparing the assessment of the duration of the IP and SP in full-age cows and cows, the first-born, taking into account 225 goals. It was found that these indicators were longer in primitive cows – 20.7 days respectively and 21.9 days in relation to full-age cows. The obtained results are completely consistent with the results obtained by a number of both domestic and foreign researchers. More attention is needed to grow heifers and to prepare newborns for delivery. In 15–17% of cows at and after the hotel, gynecological diseases that occurred in the presence of gastrointestinal diseases, lameness, mastitis and others were diagnosed. This has negatively affected the overall performance of the herd. In studying the duration of HP and SP in healthy and sick cows after calving, it was found that if the SP in healthy cows lasts 73.4 days, then in patients – 116.3 days (the difference was 42.9 days), and the difference in the duration of the joint venture reached 98.7 days. On the basis of the results of the research, it can be concluded that the reproductive function of the cows is influenced by such paratypic factors as feeding animals in the dry period, the temperature factor (time of year), the human factor (the effect of milking on a group of cows), age and physiological state of cows in the hotel and in the afterlife period. When feeding 2–3 kg of bovine feed for cows, together with rough and juicy fodder for 18–20 days prior to calving, the recovery period decreased by 8.6 days and service period – by 19 days, and fertility from two inseminals increased by 5.7%, reaching 85.3%. The smallest duration of the service-period was in the presence of cows in the I and IV quarters year (107.7–117.1 days). In primary cows, the recovery period was longer than that of full-age cows by 20.7 days, and the service period was 21.9 days. In the physiologically healthy cows after calving, the recovery period lasted an average of 73.4 days and service period – 98.7 days, and in patients, after the prescribed treatment – respectively 116.3 days and 197.4 days.

У статті надано огляд літератури та аналіз результатів власних досліджень колективу авторів щодо оцінки корів молочного напрямку продуктивності за відтворювальною здатністю. Приведено визначення основних критеріїв та індексів такої оцінки, межі застосування кожного показника, які використовуються вітчизняними та міжнародними організаціями для характеристики репродуктивної здатності маточного поголів’я великої рогатої худоби. Проаналізовано хронологічну динаміку зміни окремих показників відтворювальної здатності у корів за останні десятиліття. Запропоновано найбільш об’єктивні показники для групової та індивідуальної оцінки тварин.

The purpose of the research was to study the effects of feeding different amounts of whole milk and the feeding of high quality feed on the development of heifers and their reproductive capacity and productivity of cows. The research was carried out at farm property "Chayka" (branch "Lisne" and "Chemer") on heifers of the Ukrainian black-and-white milk breed and "Shupiki" and "Agrarian Investment Union" (AIU) on the heifers of the Ukrainian red-and-white milk breed. Three schemes were used for drawing whole milk to calves. In the "Lisne" pumped 260 kg of milk for 65 days; "Chemer" – 310 kg for 45 days; "Shupiki" and "AIU" – 360 kg for 90 days. When conducting experiments, it was found that the average live weight of calves in 3 months. The age was 100,97 + 0,893 kg; in 6 months – 166.17 + 1,794 kg; in 9 months – 239.23 + 2.831 kg, in 12 months – 308,60 + 3,648 kg in 15 months – 371,50 + 5,008 kg. There was no special difference in the live weight of calves, drinking 310 and 360 kg of milk. Average daily gain of heifers were, in the main, within 660-895 g. in 3 months. The age of somewhat higher was the live weight of calves, who drank a large amount of whole milk. Through a clinical examination of calves and weighing, it was found that, on average, up to 80 kg live weight had 5.2% calves, from 81 to 100 kg 43.5%, and more than 100 kg – 51.3%. At the age of 3 months. A greater number of calves (52.8–69.1%) had a live weight of over 100 kg, and lagged in growth from 2.4 to 9.8%. More lag (9.2%) was in the group of calves, drinking 260 kg of milk (P > 0.999). In the experiments, the development and productivity of the daughters of the separate bulls of the Holstein breed of red-and-white suit was studied. Somewhat larger live weight had a heifer under the nickname "Lukka" at birth (39.2 kg) and within 3–15 months. Dairy productivity was higher among the daughters of the bug "Kantsler" (for 305 days of the first lactation 7438.7 kg). The duration of the service period on average was 142.7 days. On the chickens of 2014–2015 births at the state enterprise "Chemer" (Ukrainian black-and-white milk breed) and "Shupiki" (Ukrainian red-and-white milk breed) found that puberty occurs in 24–30% calves at the age of 9–10 months. Among the 700 goals. Stewed heifers were detected 6.4% with abnormalities of genital organs. In the study of fertilization of well-developed heifers 13–16 months. Age (459 with a live weight of 365–380 kg), it was found that the average fertility from the first insemination was 73.6%. It was better to have younger heifers (83–89%) with high live weight for fertilization. Total from 13 to 16 months. 84.3% of heifers were impregnated with age, and the rest were later. In the experiments, the milk productivity of cows of the Ukrainian black-and-white milk breed (512 lactas) and Ukrainian red-and-white milk breeds (406 lactations) was analyzed. Indicators indicate satisfactory milk productivity of cows for the first two lactations (over 7.5 thousand kg) under different schemes for giving to calves of milk. Conclusions: Feeding calves from 260 to 360 kg of whole milk and feeding the premature feed or full-grain granules provides their normal development in 90,2–97,6% of calves with daily increments of 660–895 g. The heifers which drank 310–360 kg milk smaller increments were observed in some calves of all groups after the milking period (from three to six months). The average fertility index of heifers from the first insemination is 73.6%. The best results are observed in heifers 13-15 months. Age for live weight 365–380 kg. The conditions of growing and feeding the experimental heifers in the milk and after-milk periods provide a relatively satisfactory milk yield (on average more than 7.5 thousand kg) of cows.

Effective management of dairy farming requires the creation not only of highly productive herds, but also to increase the fertility of cows and their long-term productive use. Although cattle have a long biologically possible longevity, but in practice this potential is not sufficiently used. Most scientists and practitioners previously considered the rational age of the first insemination of normally developed heifers to be 17–20 and even 23 months. But in recent years, most scientists have advocated insemination of heifers at 14–17 months. We were tasked to study the reproductive capacity and milk productivity of Holstein, Ukrainian Black-and-White (UBaWDB) and Ukrainian Red-and-White (URaWDB) dairy cows for the first two lactations, depending on age and live weight during insemination of heifers. It is planned to continue the study during the long-term economic use of cows. Research and production experiments were performed on cows of Holstein, UBaWDB and URaWDB breeds of the first two lactations of CJSC "Agro-Region" and SE "Chaika" taking into account the results of our previous research on breeding, age of fertilization and live weight of heifers. Heifers were inseminated at the age of 12–22 months at a live weight of mainly 360–380 kg. According to personal research and zooveterinary records, physiologically normal calvings occurred in 72% of cows and in 19% of cases the assistance was provided by 1–2 people, and in 9% of heifers and cows the births were difficult and required qualified veterinary care. According to the results of completed lactations, 188 first-born cows were found: the average duration of the service period (SP) was 175 days (from 114 to 212 days) and lactation (LP) 389 days (from 327 to 419 days). Hope milk for lactation was 9814 kg and for 305 days lactation – 8160 kg, daily hopes – 25.3 kg. In terms of duration of joint venture and productivity, the advantage was for younger cows. Experiments on 137 cows of the second lactation UBaWDB breed SE "Chaika" show that the average service period lasted 156 days and the lactation period – 355 days. During lactation, 9461 kg of milk is milked, and for 305 days – 8452 kg. The daily milk yield was 26.7 kg with an average fat content of 3.80%. When inseminating developed heifers aged 12–14 months (43 goals) SP for the second lactation lasted an average of 155 days (at the first lactation – 182 days). Lactation lasted 351 days, during which 10045 kg of milk was milked. When inseminating heifers at the age of 15–18 months (74 goals) SP lasted 154 days (during the first lactation – 166 days). Lactation lasted 349 days and milked 9282 kg of milk. When inseminating heifers at the age of 19–22 months (20 goals) SP lasted 162 days (with the first lactation – 176 days), and lactation – 366 days and milked 9116 kg of milk. The first lactation was completed by 181 cows with an average gestational age of 280 days, recovery period (RV) – 72 days, service period – 123 days, lactation period – 344 days, milk productivity per lactation – 7974 kg and daily milk yield – 23.3 kg of milk. The second lactation was completed by 171 cows with the following average indicators: duration of pregnancy – 280 days, RP – 74 days, SP – 127 days, LP – 339 days, hopes for lactation – 8125 kg and daily hopes – 24.5 kg. When inseminating heifers of all breeds at the age of 12–14 months the average duration of the joint venture was 102 days, at 15–18 months – 121 days and at 19–20 months – 136 days, and hopes for lactation – respectively 7170 kg, 7813 kg and 8672 kg. In the 134 Holstein cows controlled, the average duration of SP was 143 days, LP – 357 days and milk yield – 8938 kg. In cows of UBaWDB breed (98 heads) – respectively 100 days, 315 days and 7502 kg, and in cows of URaWDB breed (120 heads) – respectively 116 days, 327 days and 7215 kg. Conclusions. 1. The influence of the age of heifers of Holstein, Ukrainian Black-and Red-and-White dairy breeds during fertile insemination on the indicators of reproductive capacity and milk productivity for the first two lactations has been studied. 2. The optimal age for insemination of heifers should be considered 14–18 months with their normal individual development and live weight of 360–380 kg. 3. The duration of the service period in cows with a normal course of labor and postpartum period is 100–120days, milk productivity of Holstein cows – 8–10 thousand kg, UBaWDB – 8–9 thousand kg, URaWDB – 7–8 thousand kg.