РЕЗУЛЬТАТИ ГОСПОДАРСЬКОГО ВИКОРИСТАННЯ ГОЛШТИНСЬКИХ КОРІВ РІЗНИХ ТИПІВ СТРЕСОСТІЙКОСТІ
There are the expounded results of researches of stressresistant in the articles, indexes of the economic use and life productivity of golstin cows which are exploited in the conditions of intensive technology. The analysis of variance of these indexes is conducted. Correlative changeability of stressresistant cows is investigational with their life productivity. It is set that stressresistant cows have more long life-span and the economic use, greater amount of lactations, greater life yield of milk, output of suckling fat and albumen, greater amount of issue. The stake of influence of factor of stressresistant on duration of the economic use and indexes of the life productivity of cows appeared in majority middle and high in a range 14,4 - 34,1 %; P > 0,99 - 0,999. The most substantial influence of factor of stressresistant is observed on : yield of milk on one day of life 34,1 %; P > 0,999, amount of lactations 34,0 %; P > 0,999, general duration of lactational periods 33,8 %; P > 0,999, life yield of milk 26,0 %; P > 0,999, life total amount of suckling fat and suckling albumen 25,4 %; P > 0,999. Correlative changeability of type of stressresistant and most the indexes of the economic use of cows makes r = + 0,301... 0,483 at P > 0,95 - 0,999. Statistically reliable, direct cross-correlation connection, middle after force, grounds to consider that a selection on the type of stressresistant will be effective for the improvement of indexes of the economic use of golstin cows and their life productivity and reproductive ability.