华中地区土壤可蚀性因子研究

以全国第2次土壤普查数据为基础，利用 EPIC模型估算华中地区主要土壤可蚀性因子K 值，结合该区土种分布图，分析各主要土壤类型可蚀性K 值分布特征。结果表明：该区土壤可蚀性因子K值主要分布在 0.09～0.39 之间，高值区主要分布在河南省的东部、西部区域，低值区则主要分布在湖南省的南部、湖北及河南交界的中部及东部地区。依据华中地区土壤图，全区共分布有土类 25 种。其中，K 值最大的为褐土，约为0.34 ；红黏土的K 值次之，为0.31；粗骨土的可蚀性最低，约为0.19。华中地区红壤、水稻土、潮土、黄壤、黄棕壤等土类所占面积较大（约占全区总面积的 72.63% ），其土壤可蚀性因子K 值分别为：0.250 , 0.253 ,0.287 , 0.225 ,0.244，可基本反映华中地区的土壤抗侵蚀情况。

Spatial Distribution of Soil Erodibility Factor(K)in Central China

Based on data of the second national soil survey,the soil erodibility factor(K) of central China was calculated by EPIC(Erosion-Productivity Impact Calculator) model,and the spatial distribution of soil erosion factor of different soil types was worked out.It was revealed that the K value of soils in central China mainly ranged from 0.09 to 0.39,with high values in east and west Henan,and low values in south Hunan and the middle and east border of Hubei and Henan Province.There are 25 soil types in central ...