[Comparative analysis of milk yield of black-motley cows of various types]
2007
Doroshko, A.A.,Volkovysk State Agrarian College (Belarus) | Tanana, L.A.,Grodno State Agrarian Univ. (Belarus) | Dashkevich, M.A.,National Academy of Sciences (Belarus). Scientific and Practical Center for Arable Farming
The researches are devoted to the study and comprehensive analysis of economic-useful signs of the cows of Holland and Golshtin line selection in the farms with different zootechnical background, since a subsequent genetic improvement of the cattle of Belarusian black-motley breed is planned to make in the direction of crealing milk and milk-meat inbreed types. As a result of the studies made it is established that in the farms of the Volkovusk district the first heifers of Holland line selection are superior to the coevals of Golshtin line selection by the milk rate by 142–302 kilogram, in the milk fat content – by 0.02– 0.05% and in a milk protein content – by 0,07–0,08%. The tendency of superiority of the cows of Holland line selection to the cows of Golshtin line selection during 3 lactations in the milk production by 87–425 kilogram, in the milk fat content – by 0.02–0.05% and in the milk protein content – by 0.01–0.10%, is found
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