不同氮肥水平对高寒草甸植物生长的影响

EFFECTS OF DIFFERENT NITROGENOUS FERTILIZER LEVELS ON THE GROWTH OF ALPINE MEADOWS

以高寒草甸嵩草草甸为对象,分析了不同氮肥水平对高寒草甸植物生长的影响。结果表明,在尿素施用量为250kg/hm^2时,高寒草甸牧草地上植物量鲜重、干重和植物全氮分别为594g/m^2、261.87g/m^2和5.65%,较对照处理分别显著增加了1.79倍、2.06倍和32.32%(P<0.05)。相关性分析表明,尿素用量与高寒草甸牧草地上植物量呈显著正相关(P<0.05)。以上结果反映出,施用尿素能促进高寒草甸植物生长。尿素施用量250kg/hm2为最佳。

The effects of different nitrogen fertilizer levels on the growth of alpine meadow were analyzed.The results showed that the aboveground plant weight and dry weight of alpine meadow herbage were 594,261.87g/m^2 and 5.65%when the urea application was 250kg/hm^2,which significantly increased 1.79 times,2.06 times and 32.32%(P<0.05)compared with control treatment.Correlation analysis showed that there was a significant positive correlation between urea and alpine meadow forage on the ground(P<0.05).All above results showed that the application of urea could promote the growth of alpine meadow,and the application amount of urea was 250kg/hm^2 as the best application amount.