湖南东部植被恢复对土壤有机碳矿化的影响

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 mineralization in the east of Hunan, China

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

表7 土壤有机碳累积矿化量(Cm)和土壤有机碳矿化率(Cm/SOC)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 (SOC) cumulative mineralization (Cm) and the percentage of Cm to SOC content (Cm/SOC)

项目 Item 模型 Model 变量 Variable 回归方程 Regression equation 多元相关系数 Multiple correlation coefficient (R) 调整判定系数 Adjust R2 F P Cm 1 TN Cm = 0.572 TN + 0.250 0.986 0.969 380.581 0.000 2 RB Cm =0.474 TN + 0.000006 RB + 0.290 0.991 0.978 273.558 0.000 Cm/SOC 1 Soil C:N Cm/SOC = -0.302 C:N +8.717 0.732 0.494 12.700 0.004