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选取新疆各县1979—1983年土壤普查中44个剖面资料,按总盐量、总碱度、CI-、SO_4~(2-)和CI-/SO_4~(2-)等五顷数值分类的变量指标,进行盐土主成分分析和类型判别分析,得出各变量分类界限指标,总值>1.2％为盐土,<1.2％为盐化土壤。土属划分视CI-/SO_4~(-2)比值而定,比值<1.0为型;SO_4~(2-)型;1.0～1.5为CI-—SO_4~(2-)型;1.5～1.7为SO_4~(2-)—CI-型;>1.7为CI-型:总碱度>4.4me/100g为苏打盐土或苏打化土壤。这种分类与依万诺娃等的划分指标不同。以此检验8个未知土类,结果表明与实际情况基本吻合,而且更为确切。
According to the data of 44 profiles in the soil census of 1979-1983 in Xinjiang, the data of total salt, total alkalinity, CI-, SO 4 4- (2-) and CI- / SO 4 4- According to the principal component analysis and type discriminant analysis of saline soil, the index of classification of each variable was obtained. The total value> 1.2% was salt soil, and <1.2% was salinized soil. The classification of soil is dependent on the ratio of CI- / SO_4 ~ (-2), the ratio is <1.0 for SO_4 ~ (2-) type, 1.0 ~ 1.5 for CI - SO_4 ~ (2-) SO_4 ~ (2 -) - CI-type;> 1.7 for CI-type: total alkalinity> 4.4me / 100g for soda or soda soil. This classification and according to Wannuo Wa divided indicators such as different. This test 8 unknown soil, the results show that the actual situation is basically consistent, but more precise.