IMPACT OF VITAMIN-MINERAL MIXTURE ON OVARIAN RESUMPTION AND POST-PARTUM ANOESTRUS INCIDENCE IN CROSS-BREED (HOLSTEIN FRIESIAN X SAHIWAL) DAIRY COWS

Abstract

Minerals and vitamins are important regulators of reproductive performance of dairy cows so deficiencies of these nutrients in dairy cows cause reproductive problems. In this study the effect of provision of vitamin-mineral mixture during post-partum anestrous period, on resumption of ovarian activity was invdstigted. The study was conducted on cross-breed dairy cows (n=66) suffering from post-partum anestrous, being divided into treatment group (n=56). Treatment group, supplemented with vitamin-mineral mixture, resumed ovarian cyclicity within 8-62 days post treatment while only 20% of control group showed cyclicity in the same period. Regression analysis applied among variables i.e., age of animal, milk production and ovarian resumption showed the relation to be highly significant (P<0.001). It was observed that ovarian resumption has positive correlation with milk production (b=3.064) and age of the animal (b=0.469).