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江西省红壤分布广 ,土壤缺钾严重。采用省内三种富钾火山岩作矿物钾肥 ,田间试验结果表明 :每亩土地施用 3 40kg矿物钾肥 ,对农作物的增产和改善土壤环境均有较好的效果 ,当季花生可增产 3 6%～ 13 3 4% ,第二季大豆在不施用钾肥的情况下 ,仍可增产19 96%～ 3 4 83 % ,钾元素的残效作用好于氯化钾化肥 ,而在等效钾的情况下 ,当地矿物钾肥的使用成本仅有氯化钾化肥的 1/5。
Red soil in Jiangxi Province is widely distributed and soil potassium deficiency is serious. Three kinds of potassium-rich volcanic rocks in the province were used as mineral potash fertilizer. Field experiments showed that applying 40kg of mineral potash fertilizer per mu had good effect on crop yield increase and soil environment improvement, peanut yield increased 36% 13 3 4%. In the second season, soybean yield could still increase by 19 96% -34 83% without applying potassium fertilizer. The residual effect of potassium element was better than that of potassium chloride fertilizer. In the case of equivalent potassium, The cost of using local mineral potash is only 1/5 of that of potassium chloride fertilizers.