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3 氮添加处理、退化类型以及两者的交互作用对不同功能群地上生物量及其在群落地上生物量中所占比例(%)的双因素方差分析

Table 3 Results of two-way ANOVA on the effects of nitrogen (N)-treatment and degradation type on aboveground biomass of plant functional groups and their proportions of the community aboveground biomass

响应 Response 名称 Term df F p 禾草生物量 Grass biomass DT 2 11.70 <0.001 N 5 11.76 <0.001 DT × N 10 0.72 0.696 禾草百分比 Grass percentage (%) DT 2 12.70 <0.001 N 5 7.34 <0.001 DT × N 10 0.81 0.616 杂类草生物量 Forb biomass DT 2 28.28 <0.001 N 5 1.13 0.358 DT × N 10 1.35 0.238 杂类草百分比 Forb percentage (%) DT 2 12.35 <0.001 N 5 7.01 <0.001 DT × N 10 0.80 0.738