摘要
采取生物耗竭试验与实验室化学模拟相结合的方法对四川省内主要土壤的供钾能力进行了研究。速效钾和缓效钾是反映土壤供钾状况的最主要因素，无论旱地或水稻土，灰棕紫泥是钾素状况最好的土壤；缓效钾可作为土壤能否连续满足作物对钾的需要的判断指标之一，缓效钾基础水平高的土壤其供钾潜力也大。灰棕紫泥和红棕紫泥有较强的供钾潜力，红棕紫泥尤其是红棕紫泥水稻土必须注意施用钾肥以补充和维持土壤的钾素水平。
The author studied the potassium supplies of main soils in Sichuan Province by means of living things exhaustion experiment and chemical simulation test in lab.The quick available potassium and slow available potassium were the most important representatives of soil potassium supplies. Grey-brown-purple soil was the best potassium supplier in both dry land and paddy soil.The slow-available potassium could be used as the judging indicator for whether or not the soil can continually satisfy the crop,s demand for the potassium. Soils with high slow-release K level had high potential in potassium supplies.Potassium fertilizer should be applied to red-brown-purple soil especially paddy soil to supplement and maintain the K level in soil.
出处
《西南农业学报》
CSCD
北大核心
1998年第1期49-53,共5页
Southwest China Journal of Agricultural Sciences
关键词
土壤
供钾能力
速效钾
缓效钾
判断指标
四川
Potassium supplies Quick available potassium Slow-release potassium Judging indicator
