摘要
无芒雀麦草地增旋N0 、N6 0 、N90 和N12 0 四个处理 ,重复 3次 ,经 3年的观测 ,其结果表明 ,在每公顷施氮 60— 1 2 0 的范围内 ,无芒雀麦的干物质产量随施氮水平的提高而增加 ,施氮水平较高时 (N12 0 )、无芒雀麦在施肥后连续两年内增产效果显著。粗蛋白质含量亦随施氮水平的提高而提高 ,无氮浸出物含量变化正好相反 ,粗脂肪含量有随施氮水平提高而增加的趋势 ,但增加的量甚小 ,对家畜营养影响不大。
The experiment consisted of four treatments.N 0,N 60 ,N 90 and N 120 .It was repeated three times.The results show that when N was applied within the range from 60/ha to 120/ha,DM yield of Bromus inermis increased with the addition of N.when large amount of N was applied (i.e.N 120 ),the yield increased obviously in the first two successive years Grude protein in DM of B.inermis increased with the addition of N,but nitrogen-free extract decreased.Ether extract contents tended to increase,but the amount increased was very small,so in had little effect on the nutrition of livestock.
关键词
雀麦
无芒雀麦
氮肥
产草量
营养成分
Bromus inermis
Nitrogen fertilizer
Herbage yield
Nutrient contents
