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在草甸土上设置不同施肥处理的定位试验。连续１０年的玉米产量结果表明，施用肥料可使玉米增产４２．３～６３．１％，氮肥效果最为明显，钾肥次之，磷肥无效。同一施肥处理不同年份玉米产量变异系数平均为１２．３９％；同一年份不同施肥处理玉米产量变异系数平均为１５．４４％，肥料效应大于年成效应。后效结果表明，亩施有机肥５０００ｋｇ的大区为上一年产量的９８．８％，而化肥大区仅为７６％，有机肥后效大于化肥。
Set up different fertilization treatments on the meadow soil. The results of maize yield for 10 consecutive years show that the application of fertilizer can increase yield of maize by 42.3 ~ 63.1%, the effect of nitrogen fertilizer is the most obvious, followed by potash fertilizer, and phosphate fertilizer is ineffective. The average coefficient of variation of corn yield was 12.39% in the same fertilization years. The coefficient of variation of yield of maize in different fertilization treatments in the same year was 15.44% on average, and the fertilizer effect was greater than the annual yield effect. After-effect results show that 5000 kg of organic fertilizer Mushi large area of the previous year’s output of 98.8%, while the area of 76% of chemical fertilizer, organic fertilizer greater than fertilizer after effects.