Caring methods of male and female Holstein breed cattle and improving high-productive cattle herds in the condition of Uzbekistan

In this article, the conditions of keeping cattle of different ages on the farm were studied towards satisfying the demand of the population of the Republic for milk and dairy products. Biological methods of zootechnical selection and adaptation to the external environment, growth and development of cattle, identification of external characteristics, and preparation of heifers for breeding, milking of first-generation cows and economic efficiency were determined in the experiment. The nutrients consumed was different in the experimental groups. It was assumed that group I was 100%, group II was equal to 105.4% and group III was equal to 110.1 feed units. Per 1 kg of feed per group was 183, 183, 185 grams, respectively. The protein-sugar ratio was 1: 0.47-0.48. Dry matter per 1 kg of feed unit was 1.17-1.20 kg, followed by 12.2-12.5 MJ of exchange energy, 362-370 grams of fiber and 87-90 grams of sugar. Improvement of cattle had a positive effect on the rise of their living mass and the improvement of their exterior properties.

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