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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＝－０８３），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＝－０６３），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 magnetometer and other new techniques, combined with some soil physical and chemical indexes such as soil structure stability and CEC, the paper carried out a preliminary quantitative study on the characteristics of land degradation in different parts of slope in Dongxi Shaxian County in western Fujian. Soil 137Cs content and slope showed a strong logarithmic relationship (R = -0.83), indicating that land degradation aggravated with the increase of slope degree; ② soil surface enrichment coefficient of magnetic susceptibility and slope showed a strong logarithmic relationship R = -0.63), indicating that the degradation of land aggravated with the increase of slope degree. (3) Some soil physical and chemical indexes of different soil types and different land use types showed some degradation characteristics at different saliency levels .