Milk and fat yields in 3X and 4X milking schedule in Holstein Cows of Iran were investigated using 374170 milk and fat yield test day records measured on The 1st and 2nd lactions of 54580 dairy cattle coming from 205 herds. The records had been collected from 2007 to 2009 by the Iranian Animal Breeding Center (IABC). The results indicated that an increases in the milking frequency from 3X to 4X increases milk and fat yields during the lactation periods by 14 and 12.6%, respectively. These values amounted to 15.6 % and 17 % during the lactation peaks. Estimated of co (variance) components were derived from a random regression model using ASReml. Heterogeneous structure was used for the residual variance. A value of 0.25 was estimated for the heritability of milk yield in 3X and 4X milking schedules. The heritability of fat yield in the 3X and 4X milking times were recorded as 0.11 and 0.17, respectively.
MOGHBELI DAMANE, M., ASADI FOZI, M., & AYATOLLAHI MEHRJERDI, A. (2013). The Effect of Milking Frequency on Milk and Fat Yield,
and Their Curves in Holstein Dairy Cows of Iran. Iranian Journal of animal Science, 44(1), 61-70. doi: 10.22059/ijas.2013.32153
MLA
Moslem MOGHBELI DAMANE; Masoud ASADI FOZI; Ahmad AYATOLLAHI MEHRJERDI. "The Effect of Milking Frequency on Milk and Fat Yield,
and Their Curves in Holstein Dairy Cows of Iran". Iranian Journal of animal Science, 44, 1, 2013, 61-70. doi: 10.22059/ijas.2013.32153
HARVARD
MOGHBELI DAMANE, M., ASADI FOZI, M., AYATOLLAHI MEHRJERDI, A. (2013). 'The Effect of Milking Frequency on Milk and Fat Yield,
and Their Curves in Holstein Dairy Cows of Iran', Iranian Journal of animal Science, 44(1), pp. 61-70. doi: 10.22059/ijas.2013.32153
VANCOUVER
MOGHBELI DAMANE, M., ASADI FOZI, M., AYATOLLAHI MEHRJERDI, A. The Effect of Milking Frequency on Milk and Fat Yield,
and Their Curves in Holstein Dairy Cows of Iran. Iranian Journal of animal Science, 2013; 44(1): 61-70. doi: 10.22059/ijas.2013.32153
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