青藏高原高寒草甸植物群落生物量对氮、磷添加的响应

杨晓霞, 任飞, 周华坤, 贺金生

Responses of plant community biomass to nitrogen and phosphorus additions in an alpine meadow on the Qinghai-Xizang Plateau

YANG Xiao-Xia, REN Fei, ZHOU Hua-Kun, HE Jin-Sheng

表1 氮、磷添加对不同功能群的地上生物量(g·m-2·a-1)和其在群落总生物量中所占比例(%)的影响的双因素方差分析表

Table 1 Two way ANOVA of the effects of nitrogen and phosphorous additions on aboveground biomass of different functional groups and their proportions of the community biomass

氮添加 N addition 磷添加 P addition 氮磷交互作用 N × P interaction F p F p F p 莎草生物量 Sedge biomass 0.28 0.611 15.60 0.006 2.75 0.141 莎草生物量 Sedge biomass (%) 0.01 0.910 17.53 0.004 0.79 0.403 禾本生物量 Grass biomass 15.24 0.006 39.95 <0.001 0.80 0.400 禾本生物量 Grass biomass (%) 12.78 0.009 19.64 0.003 0.19 0.676 杂类草生物量 Forb biomass 1.91 0.210 0.13 0.730 0.97 0.358 杂类草生物量 Forb biomass (%) 9.91 0.016 9.34 0.018 0.04 0.844