摘要
土壤中常见阳离子对高吸水树脂吸水率具有很强的降低作用。其降低程度和这些离子在土壤中的代换力排列近似,即:Fe^(++)>Al^(+++)>Ca^(++)>Wg^(++)>NH_4^+>Na^+>K^+。两种离子交互作用对高吸水树脂吸水率的降低具有增强作用,但不是简单的累加,而且互作可以抵消单盐离子富集对高吸水树脂吸水率的影响。不同类型的土壤施用高吸水树脂抗旱保水、保肥的效果因其阳离子代换量不同而产生不同的效果,即:砂土>粘土>壤土。
Common cations in soil could make obviously absorp-tion rate of water of high water-absorbing resin reduce.According to the degrees of reduction,effects of these cations were Fe^(++)>Al^(+++)>Ca^(++)> Mg^(++)>NH_4^+>Na^+>K^+.The interaction of two kinds of cations could make the absorption rate of water of the resin reduce further,and offset the influence of accumulation of a kind of cation upon the absorption rate of water of the resin.The effects that the resin keeps the water and the fertility of soil varied with the kinds of soil.that is,sand>clay>loam
关键词
土壤
代换性离子
高吸附树脂
high water-absorbing resin
soil
exchangeable ion
abso-rption rate of water
