ПРОДУКТИВНЫЕ И АДАПТАЦИОННЫЕ КАЧЕСТВА ЧЕРНО-ПЕСТРОГО СКОТА НА ЮГЕ РОССИИ

Abstract

The purpose of the study was to research producing and adaptive properties in black-andwhite cattle of different origin from breeding nucleus (OJSC named after Il’ich) in Krasnodar Krai. Producing properties in cows were studied among Holsteinized animals brought from Leningrad Oblast and Belarus or bred domestically. Economic properties and integrity in cattle were analyzed with reference to genotypic (line of breed, blood line) and paratypic (yield of the first lactation, age of the first calving) properties. Animals in all groups exceeded minimum threshold requirements for blackand- white breed in the first lactation by 1,398 - 3,039 kg, in the second one by 2,410 - 3,097 kg, and in the third one - by 2,016 - 2,106 kg. Excess over Holstein breed requirements was 398 - 2,039 kg, 1,210 - 1,897 kg and 716 - 806 kg respectively. The more pure Holstein breed was in cows the higher milk yield was observed; the tendency was more pronounced among cows of Leningrad and domestic origin. The higher milk yield in the first lactation the lower was age of the cattle withdrawal. Calving interval (CI) in high-producing cows demonstrated positive correlation to the milk yield in the first lactation; in less producing cows the correlation was to the milk yield in the second lactation. The more pure Holstein breed was in cows the loner CI they had. Advantageous varieties were found in each group of outsourced animals which demonstrated high productivity and vitality thus proving breeding activities in that direction effective. Analysis data proves reasonable selection of daughters from certain breeders into bull producing group.