退化草地恢复过程中群落物种多样性及生产力对氮磷养分的响应

王洪义,常继方,王正文

Responses of Community Species Diversity and Productivity to Nitrogen and Phosphorus Addition During Restoration of Degraded Grassland

WANG HongYi,CHANG JiFang,WANG ZhengWen

表2 氮磷添加对不同功能群相对生物量影响的多因素方差分析

Table 2 Results (F-values) of three-way ANOVAs of the effects of nitrogen and phosphorus addition on different functional group relative biomass

自由度 Df 根茎型禾草 Perennial rhizomatous grass, PR 杂类草 Perennial fobs, PF 丛生禾草 Perennial bunch grass, PB 豆科植物 Perennial leguminous plant, LE 氮N 1 214.7331*** 178.276*** 11.265** 35.081*** 磷Pr 5 0.588 1.571 1.292 1.789 年份Y 3 51.790*** 6.393*** 27.297*** 42.878*** N×Pr 5 1.061 2.724* 2.071 0.834 N×Y 3 21.779*** 36.254** 1.876 4.135** Pr×Y 15 0.948 0.997 0.960 0.819 N×Pr×Y 15 1.182 0.653 0.577 0.624