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四川省农业科学院土壤肥料研究所同国际钾肥研究所合作 ,在旱地小麦 -玉米 -红苕轮作中定点连续施用氯化钾试验 ,研究其效益和对土壤有效钾和氯含量的影响。试验从 1998年玉米一季开始至 2 0 0 1年小麦收后结束。历时 3年 9茬作物。结果表明季季连续施用氯化钾增产效果和效益都十分明显。施用后土壤表层有效钾增加 ,同时氯也略有增加 ,但不构成危害。同时试验研究也证明有机肥仍是价廉物美的丰富的钾源
Soil and Fertilizer Institute of Sichuan Academy of Agricultural Sciences, in cooperation with the International Potash Institute, conducted continuous and in-situ potassium chloride tests on dryland wheat-maize-red cress potatoes to study their benefits and their effects on soil available potassium and chloride. The trial ended from the beginning of the 1998 maize season to the end of 2001 when wheat was collected. Lasted three years and nine crops. The results showed that continuous application of potassium chloride in seasonal season results and benefits are obvious. After application of soil surface available potassium increased, while slightly increased chlorine, but does not constitute a hazard. At the same time, experimental studies have also proved that organic fertilizer is still a rich and cheap potassium source