乳酸菌和玉米粉对桑叶青贮品质的影响OA北大核心CSTPCD

The aim of this study was to evaluate the effects of lactic acid bacteria and corn meal on tthe nutrient composition,fermentation parameters,and active substance content of mulberry leaves silage feed.Two groups were set up in the experimental,single mulberry leaf group(group Y)and mixed mulberry leaves group(group H)supplemented with 106 CFU/g FM Lactobacillus and 10%corn grits.After silage 0,7,14,45 days,samples were taken to analyze the changes of fermentation quality,chemical and active components of silage mulberry leaves.The results showed that compared with group Y,the concentrations of crude protein,crude fat,acid detergent fiber,neutral detergent fiber,and calcium in group H were significantly decreased(P<0.05).At silage 0～14 days,the pH value of group Y decreased significantly(P<0.05),and the lactic acid content increased significantly(P<0.05),and the pH value of group Y changed slowly after day 14.The pH value of group H was significantly decreased(P<0.05)and the lactate content was significantly increased at the 0～45 days(P<0.05),and the pH value of group H was significantly lower than that of group Y(P<0.05).On the 45th day,the content of lactic acid was significantly higher than that in group Y(P<0.05),and the content of ammonia nitrogen was significantly lower than that in group Y(P<0.05).On the 45th day of silage,the concentrations of flavonoids in both groups were decreased(P>0.05),and the contents of polysaccharide and DNJ were significantly decreased(P<0.05).The content of polysaccharide in group H was higher than that in group Y,but the concentrations of flavonoids and 1-Deoxynojirimycin(DNJ)in group Y were significantly reduced(P<0.05).The study indicates that the addition of Lactobacillus and corn meal accelerated the lactic acid fermentation in the early stage of silage,reduced the content of ammonia nitrogen,improved the quality of silage,reduced the content of bioactive substance of silage mulberry leaves.