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综合运用137Cs、土壤磁测等新技术手段，结合土壤结构水稳性、CEC等部分土壤理化指标，对闽西沙县东溪流域坡地不同部位的土地退化特征进行初步的定量研究，结果表明：（1）土壤中137Cs含量与坡度呈很强的对数关系（R＝－0．83），表明土地退化随坡度的增加而加剧；（2）土壤表层磁化率富集系数与坡度呈较强的对数关系（R＝－0．63），表明土地退化随坡度的增加而加剧；（3）不同地貌部位以及不同的土地利用类型之间，其土壤部分理化指标，在不同的显著性水平上，呈现一定的退化特征。
Based on the comprehensive application of 137Cs, soil magnetic survey and other new techniques, combined with the soil structure stability, CEC and some other soil physical and chemical indicators, the land degradation characteristics of different parts of slope in Dongxi Shaxi, Fuxian were studied quantitatively. The results showed that: 1) There is a strong logarithmic relationship between 137Cs content and slope in the soil (R = -0.83), which indicates that land degradation aggravates with the increase of slope; (2) The enrichment coefficient and slope of soil surface susceptibility are strong Logarithmic relationship (R = -0.63), which indicates that land degradation aggravates with the increase of slope degree. (3) The physical and chemical indexes of soil in different landform types and different types of land use vary at different significance levels , Showing some degradation characteristics.