中亚热带植被恢复对土壤有机碳含量、碳密度的影响

辜翔,张仕吉,刘兆丹,李雷达,陈金磊,王留芳,方晰

Effects of vegetation restoration on soil organic carbon concentration and density in the mid-subtropical region of China

GU Xiang,ZHANG Shi-Ji,LIU Zhao-Dan,LI Lei-Da,CHEN Jin-Lei,WANG Liu-Fang,FANG Xi

表7 土壤有机碳含量影响因子的逐步回归分析

Table 7 The stepwise regression analysis for main influencing factors of soil organic carbon concentration

因子 Factor 模型 Model 1 2 3 土壤碳磷比 Soil C/P ratio 0.141 0.111 0.101 土壤pH值 Soil pH value -17.073 -19.492 凋落物层C/P比 C/P ratio in litter layer -0.009 常数项 Constant term -0.285 82.592 105.516 多元相关系数 Multiple correlation coefficient (R) 0.792 0.874 0.912 调整判定系数 Adjust R2 0.620 0.755 0.820 F 84.203 79.603 78.584 p 0.000 0.000 0.000