摘要
土壤中常见的阳离子对高吸水树脂吸水率具有很强的降低作用.其降低程度与阳离子在土壤中的代换力排列近似.即:Fe^(3+)>Al^(3+)>Ca^(2+)>Mg^(2+)>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,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 strongly reduced the water absorbing resin, The reduction degree-was similar to the ranking of replacing power of cations, namely Fe5+>Al3+> Ca2+> Mg2+> NH4+>Na+>K+. The interaction between two kinds of cations could further strengthen the reduction of absorbing rate and offset the influence of accumulation of single cation on the water absorbing rate. The effecte of conserving water and fertilizer varied with the diffetent amount of replaceable cations for different types of soil, that was sand>clay>loam
出处
《西南农业学报》
CSCD
1993年第4期68-71,共4页
Southwest China Journal of Agricultural Sciences
基金
绵阳市科委下达的课题
关键词
土壤
高吸水树脂
阳离子
吸水率
Soil High water-absorbing resin Exchangeable cation Water absorbing rate
