Studies on the Effect of Bovine Somatotropin Hormone (rbST)on Milk Yield, Milk Composition and Health of Dairy Cows

Authors : İsmail ABAŞ, Haydar ÖZPINAR

Pages : 65-73

View : 20 | Download : 10

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The aim of this study was to investigate the influence of growth hormone insert ignore into journalissuearticles values(rbST);on milk yield, milk composition, animal health and sera concentration of glucose, GOT, GPT, insulin, free fat acids and blood urea of Holstein dairy cows. In this study,20 primiparous Holstein dairy cows were treated with rbST or placebo insert ignore into journalissuearticles values(control);in weeks 10-18 and 20-28 of lactation. In the first treatment period, the ten cows of the treatment Group A were administrated 500 mg methionyl bovine growth hormone, and the other ten cows insert ignore into journalissuearticles values(Group B);the same quantity of placebo.The treatment with growth hormone or placebo was switched over in the second period. Growth hormone was administered subcutaneously every 14 days during the treatment period. In the first treatment section during growth hormone administration, the amounts of milk yield and FCM insert ignore into journalissuearticles values(4 % Fat-corrected Milk); were higher in treated than in non-treated animals by 20.30% and 22.18% respectively insert ignore into journalissuearticles values(p
Keywords : Dairy cows, somatotropin hormone rbST, milk yield, milk composition, animal health