COMPARATIVE PRODUCTION PERFORMANCE OF CROSSBRED MAINTAINED AT PANJARAPOLE, AHMEDNAGAR
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Date
2013
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Mahatma Phule Krishi Vidyapeeth, Rahuri.
Abstract
The investigation entitled, Comparative Production Performance of Crossbreds Maintained at Panjarapole, Ahmednagar was undertaken on the records of 118 HF and 74 Jersey cows maintained at Gorakshan Sanstha, Arangaon road, Ahmednagar, Dist Ahmednagar, Maharashtra (India) from 1973 to 2008.
Least squares means of total lactation milk yield (TLMY), 300 days milk yield (TDMY), lactation length (LL), dry period (DP), calving interval (CI) were worked out as suggested by Harvey (1990) by considering the effect of genetic group, period of calving, season of calving and lactation order. Wherever the effects were significant, the means of various milk productive traits were compared by Duncun’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 genetic effect and 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 3107.90+32.08 kg, 2933.76+28.60 kg, 323.61+ 2.06 days, 126.75+3.30 days, 447 days respectively.
Effect due to genetic group was significant on 300 days milk yield, calving interval, lactation length and dry period. However, effect due to genetic group was non significant on total lactation milk yield. Effect due to season of calving was significant on total lactation milk yield, 300 days milk yield, calving interval, lactation length and dry period. Period of calving exerted significant effect on total lactation milk yield, calving interval, dry period and non significant effect on 300 days milk yield and lactation length. Order of lactation exerted significant effect on total lactation milk yield, 300 days milk yield. However order of lactation did not exerted significant effect on lactatiol length, dry period and calving interval.
Phenotypic correlations among most of the milk production traits were positive and highly significant except dry period, where correlation was negative except 300 days milk yield.