科尔沁沙地沙漠化过程中土壤有机碳含量变化特征及影响因素
闫蒙, 王旭洋, 周立业, 李玉强

Characteristics and influencing factors of soil organic carbon in the process of desertification in Horqin Sandy Land
Meng Yan, Xuyang Wang, Liye Zhou, Yuqiang Li
表7 不同土层土壤有机碳与环境因子主成分( F )分析
Table 7 Principal component analysis of soil organic carbon and environmental factors in different soil layers
变量0—10 cm10—20 cm
F1F2F3F4F1F2F3F4
纬度0.448-0.048-0.7910.3140.442-0.053-0.8230.188
经度0.9210.0240.0800.1230.9200.0490.0600.108
年降水量0.6450.2360.269-0.1680.6370.2570.277-0.106
年积温0.4800.1560.3670.4690.4960.1720.3090.453
高程-0.9260.0170.003-0.280-0.933-0.0050.041-0.238
地面剖面曲率-0.0730.802-0.1020.029-0.0910.798-0.1280.009
地面粗糙度-0.3100.8830.0590.206-0.3230.8720.0260.255
坡度-0.3980.8310.0290.162-0.4130.8170.0070.223
生长季平均气温0.720-0.0530.1300.4270.739-0.0370.0750.380
生长季降水量0.192-0.1110.917-0.1150.204-0.0840.928-0.030
生长季EVI均值0.6740.391-0.040-0.4820.6490.414-0.024-0.554
生长季NDVI均值0.7370.367-0.118-0.4540.7120.389-0.101-0.520
特征值4.6952.5001.8511.1914.7292.5151.8041.171
解释变量/%36.11219.23214.2369.16336.37419.34713.8769.006
累计解释变量/%36.11255.34369.57978.74336.37455.72169.59778.603