摘要
采用主分量分析 (PCA)方法对柴达木盆地弃耕地盐渍化状况进行了研究 ,结果表明 ,该地属于中重度氯化物盐渍地 ,耕作层含盐量在 0 .5%～ 4 .0 %之间 ,盐分表聚强烈 ,基本无自然淋溶过程。耕作层第一、二主分量显著 ,累计贡献率高达 95.0 %左右 ,反映了该区土壤含盐量及盐离子分布规律 ,认为全盐量、Cl- 、Mg2 + 是该弃耕地盐渍环境的特征因子。
The principal component analysis (PCA) was used to study the salinized situation of desert land in Chaidamu basin. The results showed that land belongs to middle heavy halide salinized soils. The salt content of the cultivated horizon is 0.5%～4.0%. Salt runs into the surface soil intensely without basic natural leaching . The accumulated contribution rates of the first and second principal component are about 95.0% ,which reflect the soil salinization and soil structure state . It is suggested that the salt contents , Cl - and Mg 2+ may be thought as the characteristic factors of salinized situation of the desert land .
出处
《草业学报》
CSCD
2001年第2期39-46,共8页
Acta Prataculturae Sinica
基金
国家"九五"科技攻关项目资助!(9792 40 2 0 3)
