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分析了江苏不同在区主要上壤供钾状况，小麦施钾效果及其经济效益。试验结果表明：各在区主要土壤钾素临界值平均在（８５～１３９）×１０－６，次序为沿海＞里下河＞太湖＞徐淮＞丘陵＞沿江。目前土壤速效钾比临界值低（１７～３５）×１０－６，各农区小麦达最高产量时６６７ｍ２平均需施Ｋ２Ｏ９—１８ｋｇ，钾肥基施能促进小麦根系发育及分蘖的发生，提高抗逆性。小麦施钾以一次性基施或与早期追施相结合两种方法增产效果最佳。
The status of potassium supply on main soil in different districts of Jiangsu Province was analyzed. The potassium application efficiency and its economic benefits were analyzed. The results showed that the average critical value of K in the main soils in the area was (85 ~ 139) × 10-6 on average, with the order of coastal areas> Lixiahe River> Taihu Lake> Xuhui> hills> riverside. At present, the available potassium in soils is lower than the critical value (17-35) × 10-6. The highest yield of wheat in each agricultural area is 667m2, with an average of K2O9-18kg. Potassium fertilizer can promote root development and tillering of wheat, Sex. Potassium application to a one-time base or early combination with the two methods to maximize yield.