长期定位施肥条件下土壤钾素化学研究进展

介绍了长期定位施肥对土壤钾素形态和钾素平衡、土壤含钾矿物含量和转化,以及土壤水溶性钾、交换性钾、非交换性钾和全钾含量的影响,综述了长期定位施肥条件下土壤钾素固定、非交换性钾释放、K+吸附和解吸的特性,并对土壤钾素容量和强度(Q/I)关系曲线评价长期定位施肥土壤钾素的有效性进行了总结,最后指出了长期定位施肥条件下土壤钾素化学研究存在的问题及以后的研究方向。

Research progress in soil potassium chemistry under long-term fertilization condition

Effects of long-term fertilization on potassium balance,the content and transformation of K-bearing minerals,and the contents of water soluble K,exchangeable K,non-exchangeable K,and total K in soils are introduced.The characteristics of potassium fixation,release of non-exchangeable K,and K~ adsorption and desorption in soils under long-term fertilization condition are reviewed.This article also summarizes the evaluation of soil potassium availability with quantity-intensity(Q/I) parameters after long-term fertilization.Besides,existing problems and further research on soil potassium chemistry under long-term fertilization condition are also discussed.