长期氮添加对典型草原植物多样性与初级生产力的影响及途径
王玉冰1,2,孙毅寒1,2,丁威3,张恩涛1,2,李文怀1,迟永刚4,*(
),郑淑霞1,*()
),郑淑霞1,*()
Effects and pathways of long-term nitrogen addition on plant diversity and primary productivity in a typical steppe
WANG Yu-Bing1,2,SUN Yi-Han1,2,DING Wei3,ZHANG En-Tao1,2,LI Wen-Huai1,CHI Yong-Gang4,*(),ZHENG Shu-Xia1,*()
),ZHENG Shu-Xia1,*()
图2. 氮添加对典型草原群落功能性状多样性(FAD)的影响(平均值+标准误差)。A 株丛性状多样性, 以株高、株丛生物量和茎叶比计算。B 叶片性状多样性, 以比叶面积、叶片干物质含量和叶片N含量计算。C 整株性状多样性, 以株丛性状和叶片性状共6个指标计算。Control, 完全对照, 不添加任何肥料。各处理间差异不显著(p > 0.05)。
Fig. 2. Effect of N addition on functional attribute diversity (FAD) in a typical steppe (mean + SE). A, Plant trait functional diversity, calculated by plant height (PH), individual biomass (PB) and stem:leaf biomass ratio (SLR). B, Leaf trait functional diversity, calculated by specific leaf area (SLA), leaf dry mass content (LDMC), and leaf N content (LNC). C, Whole-plant trait functional diversity, calculated by six indices of plant and leaf traits. Control, absolute control, no fertilizer added. No significant difference among treatments (p > 0.05).
