PRODUCTION PERFORMANCE OF CROSSBRED CATTLE MAINTAINED AT COLLEGE DAIRY FARM, PUNE

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Date
2013
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Mahatma Phule Krishi Vidyapeeth, Rahuri.
Abstract
The investigation entitled, Production Performance of Crossbred cattle Maintained at college dairy farm, Pune was undertaken on the records of 131 crossbred cattle maintained at college dairy farm, College of Agriculture Pune, Maharashtra (India) for the period from 1986 to 2010. Least squares means of total lactation milk yield (TLMY), 300 days milk yield (THDMY), lactation length (LL), dry period (DP), calving interval (CI) were worked out as per the method suggested by Harvey (1990) by considering the effect of period of calving, season of calving and lactation order. Wherever the effects were significant, the means of various milk productive traits were compared by Duncan’s Multiple Range Test as modified by Kramer (1957). The data were corrected for significant effect of season of calving, period of calving and lactation order as per formula suggested by Gacula et al. (1968). The corrected data was used for study of correlation among different milk production traits. The least squares means for total lactation milk yield, 300 days milk yield, lactation length, dry period and calving interval in crossbreds were 2314.09+63.16 kg, 2170.46+53.16 kg, 338.60+6.97 days, 100.28+5.26 days, 439.19 + 7.96 days respectively. Effect of period of calving and order of lactation was significant on total lactation milk yield, 300 days milk yield and dry period. However, effect of period of calving was non significant on lactation length and calving interval. Effect of season of calving was non-significant on total lactation milk yield, 300 days milk yield, calving interval, lactation length and dry period. Order of lactation had significant effect on total lactation milk yield and 300 days milk yield. However, order of lactation did not revealed significant effect on lactation length, dry period and calving interval. Phenotypic correlations among most of the milk production traits were positive and highly significant except correlation of lactation length with dry period and calving interval, total lactation milk yield with dry period and 300 days milk yield with dry period and calving interval.
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