The Effect of Some Environmental Factors on Peak Milk Yield in Holstein Cattle

Abstract

This research was conducted to determine the effect of some environmental factors such as time to peak milk yield, lactation order, calving season, calving year, service period, and dry period on peak milk yield in Holstein cattle raised in G & ouml;kkale Agricultural Enterprise. High milk yield and its sustainability are very important for examining the effects of environmental factors on peak yield in cattle, as well as for future selection, planning and breeding practices in the enterprise. As controllable environmental factors in cattle breeding, service period and dry period are practices that should also be taken into consideration in terms of high milk yield and its continuity. In this study, the effects of the environmental factors examined on milk yield in the peak period were found to be very important (P<0.01). As a result of the data examined, the general average peak milk yield in G & ouml;kkale Agricultural Enterprise is 40.36 +/- 0.141 kg. A negative correlation of r =-0.281 was found between peak milk yield and time to peak. The relevant correlations are statistically significant (P<0.01).