【摘要】 钾是植物必需的营养元素 ,土壤是作物所需钾素的主要来源。近年来 ,我国土壤缺钾的面积不断扩大 ,而我国钾肥资源有限 ,使用替代物无疑可以缓解这一矛盾。根际土壤钾素动态直接影响作物对钾的吸收 ,农田钾素平衡状况同样影响土壤钾素动态。土壤速效钾有下降的趋势。文章从土壤钾素分级、根际钾素动态、农田钾素平衡和钠对钾的替代作用等 4方面对土壤钾素的研究进展进行了综述 ,并对一些问题提出了新的见解更多还原

【Abstract】 Potassium is one of the nutrient elements of plant. Soil potassium is the main resource of the potassium that plant needed. Recently, the areas that are short of potassium increas in our country, but the recourse of potassium fertilizer is very limited. So using a substitut is one of the methodes to solve the problem. Potassium dynamic of the rhizophere affects the potassium uptake by crop directly. The potash status affects the soil potassium dynamic. There is a decreasing trend in soil available potassium. The advance in the research of soil potassium is reviewed through following fields: soil potassium forms grading,potassium dynamic of the rhizophere and field potash balance. The new views on some aspects of potassium are suggested.更多还原