施氮水平对无芒雀麦产量和营养成分含量的影响

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。

Effect of the Nitrogen Fertilizer Amount on the Yield and Nutrient Contents ofBromus inermis

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.