保水剂在不同类型土壤上的应用效果

摘要

通过盆栽试验探讨了保水剂在3种不同类型土壤上施用后对土壤理化性质和油菜生长的影响.结果 表明:保水剂在盐碱土、风沙土、棕壤中均具有保水和保肥性能,降低了土壤容重,促进了油菜的生长,提高了产量.试验前期,施用保水剂的棕壤(Z1)土壤速效养分显著低于未施用保水剂的处理(Z0);试验中后期,施用保水剂的土壤速效养分均高于未施用保水剂的处理;与未施用保水剂处理相比,棕壤施用保水剂后油菜产量提高18.67％,显著高于盐碱土(10.23％)和风沙土(10.85％).因此,保水剂在棕壤中的应用效果优于盐碱土和风沙土.%A pot experiment was conducted to study the effects of super absorbent polymer application (SAP) in different soil types on soil physicochemical properties and rape growth. The results showed that the SAP increased the capacity of water and nutrient preservation, decreased the soil bulk density, promoted the plant growth and raised the yield of rape in saline-alkali soil, aeolian sandy soil and brown soil. At the early stage of the experiment, the available nutrient in brown soil with SAP application(Z1) was significant lower compared with the treatment without SAP application(Z0). At the middle and later stages, the available nutrients in Z1 were higher than that in Z0. Compared with Z0, the rape yield of (Z1) increased by 18. 67％, and was significantly higher than that in saline-alkali soil (10. 23％) and sandy soil (10. 85％). Therefore, the application effects of SAP in brown soil was superior to that in saline-alkali soil and sandy soil.