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在草甸暗棕壤上设置定位试验,1980～1985年6年试验结果表明,千公斤农肥平均增产粮豆3.23公斤,百公斤麦秸增产0.48公斤;配施化肥后均可提高有机肥的肥效,其中以有机肥配施化肥N、P_2O_5各5公斤为佳。不施有机肥的土壤有机质含量明显下降,施用农肥或麦秸处理的土壤有机质没有下降或略有减少。不论施用有机肥与否,土壤水解氮均有增加趋势。单施或配施氮、磷化肥的处理,土壤有机质均有明显提高。
On the meadow dark brown soil, the location experiment was set. The results of six years from 1980 to 1985 showed that the average yield of grain of KM per kilogram of farmland was 3.23 kg and that of kilogram of straw was 0.48 kg. The fertilization efficiency of organic fertilizer could be increased with the application of fertilizers, Among them, it is better to use chemical fertilizer N and P_2O_5 5 kg each with organic fertilizer. The content of organic matter in the soil without organic fertilizer decreased obviously and the content of organic matter in the soil treated with the fertilizer or wheat straw did not decrease or slightly decreased. Regardless of whether organic fertilizer is used or not, soil hydrolyzed nitrogen tends to increase. Single application or with nitrogen and phosphorus fertilizer treatment, soil organic matter were significantly improved.