本文通过对土壤的粘土矿物,含钾矿物,钾素含量状况和供钾特性进行了分析,阐明了湖南省主要稻田土壤供钾能力。研究结果表明,紫泥田、紧潮泥田供钾性能好,早稻施钾效果不明显,晚稻施钾能有一定效果。黄泥田的供钾性能次之,早稻、晚稻施钾效果显著,红黄泥田、灰泥田、麻沙泥田和河沙泥田等,供钾性能差,早稻、晚稻施钾效果极显著。 In this paper, the soil clay mineral, potassium mineral, potassium content and potassium supply characteristics were analyzed to clarify the main paddy soil potassium supply capacity in Hunan Province. The results show that purple clay field, tight tide muddy field potassium performance, early rice K application is not obvious, late rice K application can have some effect. Potassium availability of yellow muddy soil was the second, followed by early and late rice fertilization. Potassium fertility was poor in early spring and late season paddy fields.