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1 氮、磷添加对物种多样性和群落净初级生产力影响的三因素方差分析

Table 1 Results (F-values) of three-way ANOVAs of the effects of nitrogen and phosphorus addition on species diversity and community ANPP

自由度Df 丰富度 Species richness 优势度指数 Simpson 地上初级生产力 ANPP 氮N 1 49.471*** 128.848*** 630.909*** 磷Pr 5 0.988 0.666 4.292* 年份Y 3 143.588*** 163.980*** 956.638*** N×Pr 5 0.184 0.882 1.198 N×Y 3 4.398* 8.801*** 81.531*** Pr×Y 15 0.505 1.567 2.756*** N×Pr×Y 15 0.150 0.285 0.782