黄土高原优势灌丛营养器官化学计量特征的环境分异和机制

李单凤, 于顺利, 王国勋, 方伟伟

Environmental heterogeneity and mechanism of stoichiometry properties of vegetative organs in dominant shrub communities across the Loess Plateau

LI Dan-Feng,YU Shun-Li,WANG Guo-Xun,FANG Wei-Wei

表2 黄土高原优势灌丛分布区土壤养分与气候因子逐步回归分析表

Table 2 Stepwise regression analysis of soil nutrients and climate factors in the dominant shrub communities across the Loess Plateau

依变量 Dependent variable	自变量 Independent variable	回归系数 Regression coefficient	p
土壤全碳 Soil total carbon	生长季气温 Growing season temperature	-0.89	0.028^*
	年降水量 Annual precipitation	5.04	0.009^**
	生长季降水量 Growing season precipitation	-5.32	0.01^*
土壤全氮 Soil total nitrogen	生长季气温 Growing season temperature	-1.33	0.03^*
土壤全氮 Soil total nitrogen	年降水量 Annual precipitation	0.64	0.000^***
土壤全磷 Soil total phosphorous	生长季气温 Growing season temperature	-0.63	0.007^**
土壤全磷 Soil total phosphorous	年降水量 Annual precipitation	0.13	0.01^*