科尔沁沙质草地不同恢复年限草本层群落结构及其与土壤理化性质的关系

赵啸龙, 谢玉鸿, 马旭君, 王少昆

Vegetation structure and its relationship with soil physicochemical properties in restoring sandy grassland in Horqin Sandy Land

Xiaolong Zhao, Yuhong Xie, Xujun Ma, Shaokun Wang

表5 植物群落特征指数与土壤理化性质的逐步回归方程

Table 5 Stepwise regression models between vegetation community and soil physicochemical properties

植物群落特征 逐步回归方程 显著性 植物高度 Hight=10.85×SWC-10.45×AP+108.24 R2=0.845, F=18.786, P<0.001 植被盖度 Cover=1.17×AN+8.97 R2=0.863, F=46.523, P<0.001 地上生物量 Biomass=67.39×pH-33.77×AP-182.06 R2=0.911, F=36.708, P<0.001 丰富度指数 R=1.49×SWC+5.66 R2=0.590, F=8.524, P=-0.01 优势度指数 FD=0.11×SWC+0.002×SK-0.09×SOC+0.33 R2=0.806, F=8.655, P=0.002 多样性指数 H=0.33×SWC+0.01×SK-0.48×SOC+0.01×AK-0.29 R2=0.916, F=17.051, P<0.001