中文摘要：

为缓解钾素资源紧张的问题,不少学者提出了利用Na＋等离子对K＋的替代作用来解决。围绕K＋、Na＋在植物体内的生理功能、钾钠替代的生理效应以及存在的问题,着重阐述了钠对钾的替代作用;另外,还综述了K＋与NH4＋、Ca2＋、Mg2＋间的互作关系等。

英文摘要：

For alleviate the problem of the shortage of potassium, many scholars put forward to the replacement of potassium by sodium or other ions. This paper focus on physiological function of K ＋ and Na＋ in plant, physiological effect of potassium-sodium substitution and the existing problems, emphatically expounds the replacement of potassium by sodium. In addi- tion, this paper also review the interactions between K ＋ with NH4 ＋ , Ca2 ＋ , Mg2 ＋ etc.