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Information × Registration Number 0221U102371, 0119U001245 , R & D reports Title The of heifers growth intensity effectof to the productive and reproductive ability of heifers investigation popup.stage_title Head Antonenko Serhii F, Registration Date 01-02-2021 Organization Institute of animal science popup.description2  In the State Enterprise "Gontarivka" conducted a study to determine the intensity of breeding repair heifers for the manifestation of signs during the formation of sexual and physiological maturity of their body. Within the three formed groups of heifers, a retrospective analysis was performed at different intensities of cultivation. It is established that at the most effective level of growing repair heifers of the Ukrainian black-spotted dairy breed in different age periods: 3-6, 7-9, 10-12 and 12-15 months. there is a growth intensity of 701 g and more, which contributes to their earlier insemination and increased milk productivity by 305 days. It was found that the live weight of heifers at insemination was also higher in the group with higher growth intensity compared to other groups. Considering the milk productivity of first-borns according to the groups studied, we can conclude that the growth and development of heifers is of paramount importance in the system of their cultivation. The first-borns with higher growth intensity (group III) had the highest milk yield, which exceeded the peers of group I by 93.0 kg or 1.7% and 54 kg or 1.0% of animals of group II. It was determined that the fat content in the milk of experimental animals had a higher percentage in the first-born group III and was 4.08%, which is 0.4 and 0.3% higher than in animals of groups I and II. The analysis of live weight after calving was performed, and it was determined that the highest rates were heifers of group III in comparison with animals of groups I and II, their difference is 13.0 and 2.0 kg. It was found that the maintenance of heifers at the age of 9, 12, 15 months loose in group sections of 10-15 heads, compared with tethered, contributed to an increase in their live weight by an average of 13.4% and an increase in growth intensity by 13, 3% and reduction of feed consumption per 1 kg of live weight gain by 11.1%. The average daily gain of live weight in he Product Description popup.authors Antonenko Sergii F Greben Leonid G Zolotarev Andriy P Kamyshan Nataliia V Petrenko Sergii V Pomitun Larysa I Phadeenko Yana Yu popup.nrat_date 2021-02-01 Close