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高钾土壤上(速效钾含量高于100mg/kg)增施钾肥(K2O)75～225kg/hm2,冬小麦平均增产6 96%,夏玉米平均增产8 38%;1kgK2O平均增产小麦3 00kg,增产玉米4 26kg。不同土壤上同一作物最高产量施钾量以及最佳经济效益施钾量差别较大。在高钾土壤上种植冬小麦、夏玉米,钾肥(K2O)用量在150kg/hm2时,可以保持产量和维持土壤钾素平衡。
K 2 O increased from 75 to 225 kg / hm 2 on high potassium soil (K 2 O + 100 mg / kg), while the average yield of winter wheat increased 6 96% and summer maize increased 8 38% on average. 4 26kg. Different crops on the same crop maximum yield of potassium and potassium application of the best economic benefits vary widely. Planting winter wheat, summer maize and potash fertilizer (K2O) at 150 kg / hm2 in high potassium soil can maintain the yield and maintain the balance of soil potassium.