Department of Animal Production, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece.
Vet Rec. 2011 Feb 19;168(7):189. doi: 10.1136/vr.c6259. Epub 2011 Feb 15.
Energy balance was assessed during the first 13 weeks postpartum in 497 primiparous Holstein cows and the relationship with reproductive performance was investigated. A significant association was observed between body condition score (BCS) and a number of reproductive traits, including conception at first artificial insemination (AI), number of inseminations per conception, calving to conception and calving intervals, percentage pregnant by the end of a 305-day lactation and incidence of metritis. The BCS from calving to week 9 (before the first AI) appeared to adequately predict future reproductive performance as it was correlated with calving interval, conception at first AI, metritis and percentage pregnant by the end of a 305-day lactation. Plasma β-hydroxybutyrate (BHB) concentrations were correlated with the latter trait only, whereas non-esterified fatty acid concentrations were not associated with reproductive performance.
在 497 头荷斯坦初产奶牛产后的前 13 周期间评估了能量平衡，并研究了其与繁殖性能的关系。身体状况评分（BCS）与许多繁殖特征之间存在显著相关性，包括首次人工授精（AI）的受孕率、每次受孕的授精次数、分娩至受孕和分娩间隔、305 天哺乳期结束时的怀孕百分比和子宫内膜炎的发生率。从分娩到第 9 周（第一次 AI 之前）的 BCS 似乎可以很好地预测未来的繁殖性能，因为它与分娩间隔、首次 AI 的受孕率、子宫内膜炎和 305 天哺乳期结束时的怀孕百分比有关。血浆β-羟丁酸（BHB）浓度仅与后一个特征相关，而非酯化脂肪酸浓度与繁殖性能无关。
