添加丙酸和尿素对玉米青贮品质的影响  

Effects of propionic acid and urea on the quality of whole-crop corn silage

作　　者：臧艳运[1] 王雁[2] 顾雪莹[1] 陈鹏飞[2] 杨富裕[1] 

机构地区：[1]中国农业大学草地研究所,北京100193 [2]四川农业大学草业科学系,四川雅安625014

出　　处：《草业科学》2012年第1期156-159,共4页Pratacultural Science

基　　金：公益性行业(农业)科研专项(201003023);"十二五"国家科技支撑计划课题(2011BAD17B02)

摘　　要：以全株玉米(Zea mays)为研究材料,通过对其发酵品质和化学成分的分析,探讨添加丙酸(0.3%)、尿素(0.5%)、丙酸(0.3%)+尿素(0.5%)对袋装全株玉米青贮品质的影响,60d后取样分析。结果表明,全株玉米可以单独调制出良好的青贮料,添加丙酸可以降低青贮饲料的pH值、乙酸和氨态氮含量,并能显著提高全株玉米青贮乳酸含量(P<0.05);添加尿素能显著提高全株玉米青贮的粗蛋白含量(P<0.05);添加丙酸+尿素可以进一步改善全株玉米青贮品质。A trial was carried out to estimate the effects of proplonie acid and urea on the fermentation quality and chemical compositions of whole-crop corn silage. The treatments included the 0.3 % propionic acid, 0.5% urea, 0.3% propionic acid and 0. 5% urea and all corn were placed in sealed vacuum plastic bags and ensiled for 60 days. The results of this study showed that application of propionic acid decreased pH value, acetic acid and ammonia nitrogen content, and significantly increased the lactic acid content of silage corn （P〈0.05） when compared with control. The application of urea markedly improved the crude protein content of silage corn （P〈0.05）. The combination of propionic acid and urea further improved the fermentation quality of silage.

关 键 词：全株玉米 青贮 丙酸 尿素 青贮品质 

分 类 号：S816.53[农业科学—饲料科学] S513.093[农业科学—畜牧学]