主成分分析法在膜下滴灌不同年限棉田土壤表层盐渍化评价中的应用

Application of Salinization Evaluation to Soil Upper Layer of Cotton Field under Film Irrigation by Main Component Analytical Method in Different Years

利用主成分分析法和SPSS软件对膜下滴灌不同年限棉田土壤表层盐渍化程度进行了评价和分析。结果表明:利用主成分分析法可以有效地识别影响土壤表层盐渍化的主要成分,揭示土壤盐渍化影响离子的相互关系;以石河子121团实验地化验结果为依据,利用主成分分析法进行了分析,最后得出了该地块以氯化物-硫酸盐为主,为土壤盐渍化评价的定量化研究提供了依据,从而说明主成成分分析法在土壤盐溃化的评价中是切实可行的。

The assessment and analysis on salinization in soil upper layer of cotton field under film iggigation in different years were conducted with the main component analytical method and SPSS software. The results demonstralcd that the main components affecting the salinization on the soil upper layer could be effectively discriminated by the use of the main component analytical method and the mutual relation between soil salinization and iron was revealed. Based on the experimental result of Regimental Farm 121 in Shihhotze Area, main component analysis were analyzed by the analytical method. Finally, it was drawn that the upper layer in the area with SO44^2- - Cl^- could provide the evidence for quantitative study on evaluation of soil salinization.