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8 土壤有机碳密度影响因子的逐步回归分析

Table 8 The stepwise regression analysis for main influencing factors of soil organic carbon density

因子 Factor 模型 Model 1 2 3 4 土壤C/P比 Soil C/P ratio 0.172 0.141 0.127 0.124 <0.002 mm黏粒百分含量 Soil clay percentage (< 0.002 mm) 0.763 0.565 0.107 土壤pH值 Soil pH value -12.315 -20.204 凋落物层C/P比 C/P ratio in litter layer -0.012 常数项 Constant term 1.416 -4.094 57.112 114.025 多元相关系数 Multiple correlation coefficient (R) 0.796 0.865 0.889 0.916 调整判定系数 Adjust (R2) 0.626 0.739 0.776 0.825 F 86.325 73.058 60.022 61.066 p 0.000 0.000 0.000 0.000