Abstract: [Objective]To analyze the effect of different levels of yeast culture addition on milk performance and milk quality of dairy goats.[Method]In the experiment,60 healthy Guanzhong dairy goats with similar weight,milk yield,parity（2~3）and 90~120 d lactation period were randomly divided into 4 groups.Each group had 15 replicates.Each Guanzhong dairy goat was fed in a single column as a repeating group.The groups were Group 1（basic concentrate）,Group 2（basic concentrate+5 g/kg yeast culture）,Group 3（basic concentrate+10 g/kg yeast culture）,4 groups （basic concentrate+20 g/kg yeast culture）were precompacted for 10 days,and the test period was 60 days.During the test,the milk production performance and milk quality were measured.[Result]（1）The average daily dry matter intake of Guanzhong dairy goats in Group 2,Group 3 and Group 4 was higher than that in Group 1（P>0.05）,the average daily milk yield of Guanzhong dairy goats in Group 3 and Group 4 was significantly higher than that in Group 1（P<0.05）,and the milk feed ratio was significantly lower than that in Group 1（P<0.05）.（2）The rates of lactose,non-fat solids and total solids of Guanzhong dairy goats in Group 2,Group 3 and Group 4 were higher than that in Group 1（P>0.05）,while the rates of milk protein and milk fat of Guanzhong dairy goats in Group 3 and Group 4 were significantly higher than that in Group 1（P<0.05）.[Conclusion]Different levels of yeast culture can improve the milk production performance and milk quality of Guanzhong dairy goats.It is suitable to add basic concentrate+10 g/kg yeast culture,which can be popularized and applied in clinic.

Key words: yeast culture, milk goat, milk production performance, milk quality