Application of salinization evaluation to soil upper layer of cotton field under film irrigation by main component analytical method in different years.

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 demonstraled 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 SO_4~(2)-Cl~-could provide the evidence for quantilative study on evaluation of soil salinization.