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通过 3年多点田间试验 ,探讨了钾肥对啤酒大麦的增产效应及适宜施肥量。结果表明 ,影响啤酒大麦产量的限制因子为 N>P>K。通过建立肥料效应方程 ,确定了河西灌区啤酒大麦适宜的施肥量为纯 N180～ 2 10 kg/hm2 ,P2 O512 0～ 150 kg/hm2 ,K2 O70～ 90 kg/hm2 。河西灌区土壤虽富钾 ,但钾肥仍表现出一定的增产效果。
After more than three years of field experiments, the effects of potash fertilizer on barley yield and suitable fertilizer application were discussed. The results showed that the limiting factor affecting the yield of barley was N> P> K. Through the establishment of fertilizer effect equation, the suitable fertilization amount of beer barley in Hexi Irrigation Area was determined to be pure N180 ~ 2 10 kg / hm2, P2 0 512 ~ 150 kg / hm2, K2 O 70 ~ 90 kg / hm2. Although the soil in Hexi Irrigation Area is rich in potassium, the potash fertilizer still shows some stimulation effect.