绿叶汁发酵液为添加剂改善玉米青贮品质的研究

本研究以饲料玉米(Zea mays)为原料，采用绿叶汁发酵液1.0%、1.5%、2.0%作青贮添加剂，并与传统青贮工艺添加1%、3% NaCl做比较，在实验室条件下贮藏60 d。测定其青贮品质(包括微生物群落结构、pH值、粗蛋白、干物质、纤维素含量、有机酸含量)及体外消化率，并与传统青贮工艺做比较。结果显示,添加绿叶汁发酵液可以明显改善青贮品质，pH值显著降低，干物质、粗蛋白及有机酸含量均有显著性增加(P<0.05)。经体外消化试验可知，与对照相比，添加绿叶汁发酵液可显著提高青贮饲料消化率。

Application of previously fermented juice to improve the quality of forage corn silage

1.0%,1.5% and 2.0% concentration of previously fermented juice was made from forage corn silage,and these previously fermented juices were used to additives for improving the quality of corn silage.In this study,different concentration previously fermented juice were added into fermented forage corn with 1% and 3% concentration NaCl and the treated forage corn was ensiled in plastic bottles under vacuum for 60 days.Treated samples were used to estimate the quality(microbial community,pH value,content of DM,CP,NDF,ADF,ADL and organic acid) and in vitro digestibility of silage.This study showed that addition of previously fermented juice significantly improved silage quality,obviously decreased pH value,significantly increased DM、CP and organic acid content(P<0.05).The result of in vitro digestibility showed that addition of previously fermented juice improved silage digestibility when compared with traditional silage process,in which additives was only NaCl.