湖南省稻田土壤钾的供应水平普遍较低。在集约化农作制度下,连续施钾表现出明显的增产效应,但连续施钾对土壤钾素状况和供钾特性的影响还缺少深入研究。本文拟通过 IN NH4OAC、1N HNO3等化学试剂的连续提取,Q/I技术,以及吸附与解吸等温线等方法研究连续施钾与不施钾对土壤供钾 Potassium supply in paddy soils in Hunan Province is generally low. Under the intensive farming system, continuous application of potassium showed obvious stimulation effect, but the effect of continuous application of potassium on soil potassium status and potassium supply was lack of further study. In this paper, continuous extraction of chemical reagents such as IN NH4OAC and 1N HNO3, Q / I technique and adsorption and desorption isotherms were used to study the effects of continuous potassium fertilization and no potassium fertilization on soil potassium supply