中国牛业科学2026，Vol.52Issue(2)：27-31,5.DOI:10.26951/j.cnki.ccs.2026.02.005
低蛋白日粮对中国荷斯坦奶牛泌乳性能与饲养成本的影响
Effects of Low-Protein Diets on Lactation Performance and Feeding Costs in Chinese Holstein Dairy Cows
摘要
Abstract
To investigate the effects of low-protein diets on lactation performance,milk quality,feed conversion efficiency,and feeding costs in Chinese Holstein dairy cows,this trial selected 60 healthy,lacta-ting Holstein cows in their second parity from the same farm,with an average body weight ranging from(659.21±4.88)kg to(678.33±4.88)kg.The cows were randomly and evenly divided into a control group and an experimental group,which were fed a traditional high-protein total mixed ration and an optimized low-protein total mixed ration,respectively.The results showed no significant differences(P＞0.05)between the two groups in terms of daily milk yield,daily feed intake,or feed conversion efficiency.Similar-ly,no significant differences(P＞0.05)were observed in milk fat percentage,milk protein percentage,fat-to-protein ratio,or milk yield loss.However,the somatic cell count and urea nitrogen concentration in milk were significantly higher in the control group compared to the experimental group(P≤0.05).Compared to the control group,the daily feed cost per cow in the experimental group was significantly reduced by RMB 5.98,and the feed cost per kilogram of milk decreased by 9.90％(P≤0.05).In conclusion,the use of an op-timized low-protein total mixed ration had no significant impact on milk yield or milk quality in Holstein dairy cows but significantly reduced feeding costs.关键词
中国荷斯坦奶牛/全混合日粮/低蛋白日粮/泌乳性能/饲料成本Key words
Chinese Holstein cows/total mixed ration/low-protein diet/lactation performance/feed cost分类
农业科技引用本文复制引用
杨丽萍,王芳,马金,刘晓军,石菁..低蛋白日粮对中国荷斯坦奶牛泌乳性能与饲养成本的影响[J].中国牛业科学,2026,52(2):27-31,5.基金项目
2025年张掖市市级科技计划项目(ZY2025BJ34,ZY2025RC01) （ZY2025BJ34,ZY2025RC01）
