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我县夏玉米产区多属棕壤土类,土壤全钾和速效钾含量较低.由于长期的小麦夏玉米一年两熟制,忽视钾肥使用,加之近期干旱的影响,钾肥已成为我县夏玉米生产上的制约因素.全县因缺钾而形成的玉米“小老苗”面积达8万亩左右.为进一步提高钾肥在夏玉米生产上的增产效果及经济效益,笔者自1979～1985年对全县118次夏玉米追施
Most of the summer maize producing areas in our county are mostly brown loamy soil, and the content of total potassium and available potassium in the soil is relatively low. Since long-term wheat and summer maize are cooked twice a year and the use of potash fertilizer is neglected, combined with the recent drought, Constraints on corn production due to the formation of potassium deficiency in the county corn “small seedlings ” an area of about 80000 acres.In order to further increase the yield of potash fertilizer in the summer maize production and economic benefits, the author from 1979 ~ 1985 on the county 118 summer corn topdressing