Effect of Feeding on Blood Composition and Reproductive Function during the Periparturient Period in Dairy Cows

Abstract

Holstein cows were examined for blood composition about 10 days before and 7, 30 and 60 days after parturition as well as time-period to the postparturient estrus return. There were correlations between improper feeding such as excess DCP and insufficient TDN and abnormal values in Gros reaction and albumin/globulin ratio. In those having abnormal blood values metabolic disorders, dystocia and retention of afterbirth occurred and the estrus return was significantly delayed.