本文应用主组元分析和判别函数式判别的数学方法对土壤肥力的分级作了尝试,分级按第1、第2主组元进行,第1、第2主组元表达所用12项土壤性质原始数据信息量的60％;通过建立判函数式判别将25个供试土壤剖面分为5个级组,收到了较好的效果。结果表明这类数学方法在土壤肥力评价分级方面使用是有效和可行的。 In this paper, the grading of soil fertility was attempted by the method of principal component analysis and discriminant function discrimination. The grading was conducted according to the first and second main components. The first and second main components used to express 12 soil properties 60% of the amount of data information; through the establishment of discriminant function to determine the 25 soil profiles for the test divided into five levels, received good results. The results show that these mathematical methods are effective and feasible in the evaluation of soil fertility classification.