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用温室盆栽耗竭试验方法和室内模拟田间条件，对河南５类８种土壤供钾能力和固钾特性进行了研究。结果表明，砂姜黑土土壤钾素耗竭程度严重，表现是植株吸钾总量和首茬作物吸钾量最低。砂姜黑土、红粘土和粘质潮土对外源供给钾素的固钾率明显高于其他土类。褐土与黄褐土的固钾能力相似，砂质潮土最低。
Pot experiments were conducted to investigate the pot-capacity and potassium-fixing ability of eight kinds of five types of five kinds of soils in Henan Province. The results showed that soil potassium depletion was serious in Shajiang black soil, showing the lowest amount of potassium absorbed by plants and the first crop. Shajiang black soil, red clay and clayey Chao soil potassium supply rate of external potassium was significantly higher than other soil types. Cinnamon soil and yellow cinnamon soil potassium similar capacity, lowest sandy tidal flat.