Abstract: [Objective] To study the effects of probiotic fermented feed on intestinal flora and performance of dairy cows with eugastritis.[Method] 160 dairy cows with similar age and symptoms in a large-scale dairy farm in Zhangqiu District,Jinan City,Shandong Province were selected as the research objects and divided into 4 groups（n=40） by random number table method. They were divided into control group（basic diet）,experimental group I（basic diet+2% probiotics）,experimental group II（basic diet+4% probiotics）,experimental group III（basic diet+6% probiotics）,and 5 replicates were set in each group,with 8 cows in each replicate. The experiment lasted for 42 d. The intestinal flora and performance indexes of eupgastritis cows in each group were analyzed.[Result] The indexes of Escherichia coli and Salmonella in test groups I, II and III were lower than those in control group （P < 0.05）, and those in test group II were the lowest. The lactobacillus index of test groups I, II and III was higher than that of control group, and the highest was in test group II. The average daily feed intake and average daily milk yield of test groups I, II and III were significantly higher than those of control group （P< 0.05）, and the highest values were found in test group II. The ratio of feed to milk in test groups I, II and III was significantly lower than that in control group （P< 0.05）, and the lowest was in test group II. [Conclusion] Adding probiotic fermented feed to the basic diet of eupgastritis dairy cows can significantly improve the growth performance and change the intestinal flora structure of dairy cows,and 4% supplemental dose was the best.

Key words: probiotics, fermented feed, true gastritis of dairy cows, intestinal flora, production performance