基于土壤粒径分布模型的河北省土壤可蚀性研究

 利用河北省第二次土壤普查成果中的土壤质地组成、土壤图及相应的理化性质属性资料，在验证双参数修正经验逻辑生长模型准确性的基础上，将卡庆斯基土壤质地分类系统转换为美国制；并采用公式法计算该省土壤可蚀性K值，编制具有准确几何位置可与地形图配准的土壤可蚀性K值空间分布图。同时，计算得出该省土壤可蚀性K值在0.25～0.4之间的易蚀性和较易蚀性土壤面积占总土地面积的58.6%。探讨了土壤可蚀性K值和K值图的应用。

Study on the Soil Erodibility Based on the Soil Particle-size Distribution in Hebei Province

Soil erodibility is an essential parameter in the model for predicting soil erosion and also the basis for quantificative study of soil erodibility. Based on the data of soil particle-size distribution, soil map, soil physical and chemical properties in the Second Soil Investigation of Hebei Province. The veracity of the modified logistic growth model with two parameters and the conversion of soil texture scheme from the Katschinski to the USDA were studied, the soil erodible K value was calculated using the formula method and the K value map well registered with the topographic map was made, in which accurate geographic position could be located. Meanwhile, the area with soil erodible K value between 0.25 and 4.0, the erosion and relative erosion soil was about 58.6% of the total area in this province. Applications of the K value and map were also discussed.