Association between milk production and fertility characteristics of cows
1996
Uhlar, J. | Gavalier, M. | Ostertag, I.
Effect of milk yield on fertility was compared. 395 cows of Improved Slovakian Spotted Cattle with 983 lactations at an average yield of 3916 plus or minus 805 kg of milk were divided into 4 grades (lower than or equal to -2s to greater than or equal to +3s). There was observed a tendency to deteriorate in indices of fertility rate, insemination index, service period and parturition interval with an increasing milk yield. This tendency was confirmed by a succession of lactations. Average values of insemination index were 1.56, service period 100.83 days and parturition period 384.93 days
Показать больше [+] Меньше [-]