Factors affecting lifetime performance traits in frieswal cows

Abstract

A total of 205 lactation records of Frieswal (Holstein Friesian X Sahiwal) crossbred cows, from 1st to 3rd parity over a period of 9 years from 1998 to 2006 maintained at Military farm, Jammu Cantonment (J&K) are used to estimate the Lifetime performance traits. The averages for Total Dry Period (TDP), Total Calving Interval (TCI), Total Lactation Length (TLL), Total Milk Yield (TMY), Total Milk Yield per Lactation Length (TMY/LL) are 356.04 ± 10.87 days, 1233.09 ± 25.55 days, 878.86 ± 19.50 days, 8702.24 ± 256.14 Kg and 9.71 ± 0.14 with corresponding coefficient of variations 43.88%, 29.74%, 31.85%, 42.25% and 20.91% respectively. In present study, genetic groups and parity have significant effect on TCI, TLL, TMY and TMY/LL whereas period had non-significant effect on TMY and TMY/LL only. The present study suggests that different factors are affecting the lifetime performance traits in Frieswal cows.