黄土区封育和放牧草地物种多样性和地上生物量对氮素添加的响应

赵洁¹, 李伟², 井光花², 魏琳², 程积民^1,^2,^*

Responses of species diversity and aboveground biomass to nitrogen addition in fenced and grazed grassland on the Loess Plateau

ZHAO Jie¹, LI Wei², JING Guang-Hua², WEI Lin², CHENG Ji-Min^1,^2,^*

氮素添加后封育草地(F)和放牧草地(G)物种多样性指数与地上生物量之间的关系以Shannon-Wiener多样性指数为解释变量,地上生物量为响应变量建立回归模型。Regression model was established by using Shannon-Wiener index as explanatory variable and aboveground biomass as response variable. 显著性水平为Significant differences are reported as: NS, P >0.05;*, P <0.05;**, P <0.01;***, P <0.001;下同 The same below.