摘要
在青藏高原海拔3768米的高寒草甸地区进行的试验结果表明,施氮能使牧草产量和粗蛋白质含量大幅度提高,无氮浸出物含量明显下降。不同施氮量与糙毛鹅观草的增产量、粗蛋白质含量和无氮浸出物含量之间的相关性,均可用方程Y=X/(a+bX)来表达。
The experiment was carried out at the alpine meadow with 3768 metres above sea level in Qinghai -Xizang Plateau. The results indicate that: Applied N fertilizer can notably raise herbage yield and the content of crude protein of Roegneria hirsuta, but then the content of nitrogen-free extractives declines obviously. The relationship between applying different N quantity(X) and increased yield (Yiy), crude protein content(Ycp) and nitrogen—free extractives content(Y_(NFE)) are:Y_(iy)=x/(0.04808+0.000382x) (r=0.991);Y_(iy)=x/(0.8847+0.0487x) (r=0.992);Y_(iy)=x/(-0.2221+0.030303x) (r=-0.999);
出处
《中国草地》
CSCD
1990年第4期6-9,共4页
Grassland of China
