中国乳业Issue(6)：49-53,5.DOI:10.12377/1671-4393.24.06.09
过瘤胃氨基酸对反刍动物生产性能及氮排放的影响
Effect of Rumen-protected Amino Acid on Production Performance and Nitrogen Emission of Ruminants
摘要
Abstract
[Objective]To study the effects of rumen-protected lysine(RPLys)and rumen-protected methionine(RPMet)on the production performance and nitrogen emission of ruminants.[Method]Taking Holstein cows as an example,selected 40 healthy Holstein cows with a body weight of about 600 kg and a lactation period of about 60 days for this experiment.They were randomly divided into 4 groups,with 10 cows in each group,namely L group(supplemented with 30 g/head·d RPLys in the diet),M group(supplemented with 30 g/head·d RPMet in the diet),LM group(supplemented with 30 g/head·d of RPLys and RPMet each in the diet)and CK group(without the addition of RPLys and RPMet).Measure daily dry matter intake,daily milk yield,milk fat rate,milk protein rate,lactose rate,milk somatic cell count,fecal nitrogen,urinary nitrogen,and total nitrogen emission separately.[Result]Compared with CK group,L group,M group,and LM group had no significant changes in daily dry matter intake and lactose rate(P＞0.05),while the daily milk yield and milk protein rate significantly increased(P＜0.05).The milk somatic cell count,fecal nitrogen,urinary nitrogen,and total nitrogen emission were significantly reduced(P＜0.05).There was no significant change in the milk fat rate of L Group(P＞0.05),while the milk fat rate of M and LM Group increased significantly(P＜0.05).[Conclusion]RPLys and RPMet can improve the production performance of cows,regulate the health level of cow breasts,reduce nitrogen emissions,reduce environmental pollution,and help promote the green and efficient development of the animal husbandry.关键词
过瘤胃赖氨酸/过瘤胃蛋氨酸/生产性能/氮排放Key words
rumen-protected lysine/rumen-protected methionine/production performance/nitrogen emission引用本文复制引用
王诚,郭慧君,张桂国,翟桂玉,丁博群,董桂红,王玲,范秋苹,孔德玲..过瘤胃氨基酸对反刍动物生产性能及氮排放的影响[J].中国乳业,2024,(6):49-53,5.基金项目
山东省科技型中小企业创新能力提升工程(2023TSGC0594) （2023TSGC0594）
