施肥对玛曲县高寒草甸植物多样性及生产力的影响

摘要：为了解施用畜肥对于退化高寒草甸草地群落结构与生产力的影响，本研究比较了4个不同施肥处理(S0不施肥，S1施肥11.25 t/hm2，S2施肥22.50 t/hm2，S3施肥33.75 t/hm2 )下玛曲高寒草甸植物群落的响应特征。结果表明，(1) S1和S3处理的植物群落盖度显著高于S0（P＜0.05），S1和S2植物群落高度低于S0；(2)施肥后植物群落的总生物量出现增加趋势，但无显著性差异（P＞0.05），各功能类群产生不同响应，S1、S2和S3的莎草科植物的生物量及其所占总生物量的比例都同S0有显著差异（P＜0.05），禾草类与杂草类生物量呈现出了下降的趋势；(3) S1、S2和S3的Pielou均匀度指数与S0相比逐渐下降， S1与S3的Simpson多样性指数同S0相比显著下降（P＜0.05）。

Effects of fertilization on characteristics of Maqu alpine meadow communities and production

For the purpose of verifying the effection of alpine meadow's plant community characteristic and production of Maqu under organic fertilization,the reaserch compared four different fertilization treatments(S0 no fertilizer,S1 fertilization of 11.25 t/ha,S2 fertilization of 22.5 t/ha;S3 fertilization of 33.75 t/ha).The results showed that:(1) the vegetation cover degrees of S1 and S3 were significantly higher than that of S0,the vegetation heights of S1 and S2 were less than S0;(2) The total biomass of plant...