氮添加对内蒙古退化草地植物群落多样性和生物量的影响

杨倩,王娓,曾辉

Effects of nitrogen addition on the plant diversity and biomass of degraded grasslands of Nei Mongol, China

Qian YANG,Wei WANG,Hui ZENG

表2 氮添加处理、退化类型以及它们的交互作用对群落物种丰富度、多样性和地上生物量的双因素方差分析

Table 2 Results of two-way ANOVA on the effects of nitrogen (N) on plant species richness, species diversity and aboveground biomass under different levels of degradations

响应 Response 名称 Term df F p 物种丰富度 Species richness DT 2 40.64 <0.001 N 5 8.50 <0.001 DT × N 10 2.27 0.035 Shannon-Wiener指数 Shannon-Wiener index DT 2 12.84 <0.001 N 5 5.06 0.001 DT × N 10 1.50 0.179 地上生物量 Aboveground biomass DT 2 42.08 <0.001 N 5 9.53 <0.001 DT×N 10 1.30 0.264