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2 氮、磷添加对地上生物量(AGB)、地下生物量(BGB)、总生物量(TB)和地下地上生物量比(R/S)影响的双因素方差分析表

Table 2 Two-way ANOVA of the effects of nitrogen and phosphorus additions on aboveground biomass (AGB), belowground biomass (BGB), total biomass (TB) and the ratio of belowground biomass to aboveground biomass (R/S)

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 AGB (g·m-2·a-1) 13.61 0.008 66.38 < 0.001 0.95 0.363 BGB (g·m-2·a-1) 1.80 0.216 4.82 0.060 0.02 0.880 TB (g·m-2·a-1) 0.002 0.969 15.22 0.008 1.54 0.260 R/S 3.50 0.086 1.24 0.309 0.07 0.806