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Information × Registration Number 0220U104227, 0116U002276 , R & D reports Title To study efficiency кроссбридинга швицкой and Ukrainian black-motley dairy breeds. popup.stage_title Head Verbich Ivan V., Кандидат сільськогосподарських наук Registration Date 15-12-2020 Organization Khmelnitsky State Agricultyral Experimental Station of Institute of forages and agriculture of Podolia. popup.description2 The use of Ukrainian black-spotted dairy breed with bulls of Swiss breed in interbreeding gives an opportunity to increase the intensity of growth and development of their offspring, to improve their exterior-constitutional features and fattening and meat qualities of fattened young. However, local first-born cows are somewhat inferior to purebred peers in milk yield. The difference for 305 days of lactation is 93.8 kg, but the fat and protein content in milk of local cows by 0.26% and 0.19%, respectively, are better, which in general, the advantage in the yield of milk fat and protein on them benefit is 9.6 and 6.4 kg, respectively. Analysis of the reproductive capacity of cows shows that local animals were first inseminated at 545 days and the duration of fertility was 283 days, while purebred heifers were inseminated at 567 days and the duration of pregnancy was 281.5 days. The service period in these animals was 97 and 112 days, respectively. A comparative analysis of the exterior evaluation of first-born cows between the studied groups shows that local cows have higher latitudinal measurements, in particular, breast width and width in the buttocks, while inferior to purebred peers in height at withers, oblique body length and ass. When studying the natural resistance in the studied cows, it was found that the evaluated groups of animals are characterized by a sufficiently high level of protective functions of the organism and adaptability to technological conditions, which creates good opportunities for further effective selection. The general assessment of natural resistance of first-born cows in terms of morphological and biochemical parameters of blood, phagocytic, bactericidal and lysozyme activity showed that local cows have natural resistance by 3 points (61) higher than their purebred peers (58 points).   Product Description popup.authors Medvid Oleksandr V. popup.nrat_date 2020-12-15 Close