Abstract: [Objective and Method]Forty Xinjiang Brown Cattles were selected and divided into 4 groups:control group,test group 1,test group 2 and test group 3,which were fed with supplementary feeding by 0 kg/day/head,1.0 kg/day/head, 1.5 kg/day/head and 2.0 kg/day/head respectively.Effect of low-quality grazing pasture and supplements on Xinjiang Brown Cattle production performance was studied in the experiment.[Result]Results showed that the supplementary concentrated feed could increase milk production of Xinjiang Brown Cattle under the low quality grazing pasture conditions,it could inhibit the declining of milk production after high lactation period.[Conclusion]Supplementary feeding had no effect on lactoalbumin,batterfat rate and milk sugar when it was given.

摘要： [目的]低质放牧条件下补饲精饲料对新疆褐牛产奶量和乳成分的影响.[方法]试验选取新疆褐牛泌乳牛40头,随机分为4组,即对照组、试验1组、试验2组和试验3组,分别补饲精饲料0、1.0、1.5和2.0 kg/d/头.[结果]在低质放牧条件下,补饲料精可以提高新疆褐牛的产奶量.[结论]放牧加补饲对新疆褐牛泌乳盛期后产奶量下降有延缓作用,对牛乳中乳蛋白、乳脂率、乳糖、非脂固体物没有显著性影响.