近年来,随着氮、磷化肥施用量逐年增加,单产和复种指数的提高,土壤和有机肥供应的钾素已不能满足棉花高产的需要。因此从一九七二年到一九七三年,我们进行了棉花增施钾肥的试验和考察。根据两年十三个点试验结果:亩施氧化钾11.97斤,亩产皮棉181.08斤,比不施钾肥的亩产皮棉 In recent years, with the application of nitrogen and phosphorus fertilizer increasing year by year, the increase of yield and seeding index, the supply of potassium by soil and organic fertilizer can not meet the needs of high yield of cotton. Therefore, from 1972 to 1973, we conducted experiments and investigations on increasing potassium fertilizer in cotton. According to two years of test results at 13 points: KF Shi 11.97 kg of potassium, 181.08 kg per mu of lint, potassium per acre than non-potassium lint