Relation among body condition score, serum urea nitrogen and cholesterol concentrations, and reproductive performance in high-producing Holstein dairy cows in early lactation.

摘要: Body condition scoring (using a 5-point scale with quarter-point divisions) was performed on 66 Holstein dairy cows that began their second or later lactation in August, September, October 1988. Cows' body scored beginning postpartum day 4 (+/- 1) and subsequently at days 18, 32, 46, 60, 73 87. Blood samples were obtained the same dates. Reproductive health examinations conducted by 1 of 2 veterinarians 21. performance evaluated relation to score serum urea nitrogen cholesterol concentrations. Number first recorded signs estrus breeding not related calving, amount loss, cumulative 80-day milk yield, 305-day fat corrected yield. Cows calved greater than equal 3.50 required more conceive. losing 0.75 points had longer conception. calving lost services per conception diagnosis follicular cyst. Cumulative yield produced mean less yield.(ABSTRACT TRUNCATED AT 250 WORDS)