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6 植被因子和土壤因子主成分载荷矩阵、特征值及贡献率

Table 6 The principle component loading matrix, eigenvalue, contribution rate for vegetation and soil factors

因子 Factor 主成分 Component 1 2 3 4 5 植物多样性指数 Species diversity index 0.687 -0.504 -0.200 -0.020 -0.259 群落总生物量 Community total biomass 0.877 0.247 -0.056 0.301 0.169 地上部分生物量 Aboveground biomass 0.862 0.279 -0.054 0.311 0.162 根系部分生物量 Root biomass 0.913 0.132 -0.13 0.221 0.221 凋落物层现存量 Existing biomass in litter layer 0.841 -0.247 0.112 0.180 0.079 凋落物层C含量 C concentration in litter layer 0.281 0.562 0.149 0.708 0.001 凋落物层N含量 N concentration in litter layer 0.786 -0.123 -0.232 -0.011 0.218 凋落物层P含量 P concentration in litter layer 0.810 -0.360 -0.080 0.199 -0.263 凋落物层C/N比 C/N ratio in litter layer -0.522 0.625 0.241 0.501 -0.106 凋落物层C/P比 C/P ratio in litter layer -0.622 0.745 0.06 0.12 0.112 凋落物层N/P比 N/P ratio in litter layer -0.204 0.439 -0.3 -0.533 0.577 土壤容重 Soil bulk density -0.384 -0.614 -0.367 0.237 0.157 0.05-2 mm砂粒百分含量 Soil sand percentage (0.05-2.00 mm) -0.531 -0.57 0.549 0.187 0.078 0.002-0.05 mm粉粒百分含量 Soil silt percentage (0.002-0.05 mm) 0.276 0.615 -0.65 -0.122 -0.098 <0.002 mm黏粒百分含量 Soil clay percentage (<0.002 mm) 0.914 -0.023 0.174 -0.21 0.043 土壤pH值 Soil pH value -0.575 -0.702 -0.204 0.159 0.195 土壤全磷含量 Soil total phosphorus concentration 0.631 0.342 -0.248 -0.457 -0.291 土壤速效磷含量 Soil available phosphorus concentration 0.656 -0.095 0.482 -0.204 -0.187 土壤碳氮比 Soil C/N ratio -0.244 0.446 0.616 -0.205 -0.273 土壤碳磷比 Soil C/P ratio 0.350 0.066 0.861 -0.155 0.191 土壤氮磷比 Soil N/P ratio 0.499 -0.120 0.720 -0.172 0.296 贡献率 Contribution rate 40.533 18.984 15.113 8.953 4.995 累积贡献率 Accumulative contribution rate 40.533 59.517 74.630 83.583 88.578