贮存时间对玉米秸秆营养物质损失的影响

The influence of the storage time on the nutrient content and the DOM of corn stalk

确定玉米秸秆贮存时间与营养成分变化关系可有效利用秸秆饲料资源,以农大108玉米秸秆收刈后在棚舍内保存1～125d,分析研究不同时间点的粗蛋白、NDF、ADF总量和可消化有机物量,结果表明不同时间点干物质、粗蛋白的量差异不显著,NDF、ADF量随贮存时间延长而增加(p<0.05),可消化有机物量减少,秸秆的水分量显著减少,贮存时间改变了秸秆的营养物质含量(浓度),主要是由于秸秆水分的损失。

Nutrient content of corn stalk stored at different time was conducted through this trials. The chemical components and digestible organic matter in vitro （DOM） of corn stalks at different storage time from 1 to 125 days was analyzed. The results show that water and DOM in stalks decreased significantly with storage time, but NDF and ADF were enhanced （P〈0.05）. The major changing occurred in the early storage time. It indicated that corn stalks at early stage have good nutrition, and should be used as soon as possible.