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通过对棕壤土有机肥和化肥长期定位施肥的研究表明,长期施肥对作物产量和土壤耕层中的有效养分有显著性影响(P<0.05)。与试验前土壤相比,施用有机肥能显著增加作物产量和土壤中的养分含量;当有机肥和无机肥配合施用时,其促进作用明显大于单施化肥。单施化肥能够提高作物的产量和土壤的有效养分,但增加幅度不大。经过27年施肥,不同处理的作物产量和土壤中的有效养分有一定程度的变化,随着年份的延伸,作物产量和土壤中的有效养分的含量有一定程度的增加,各处理之间无明显差异。
Long-term fertilization of organic manure and chemical fertilizers on brown earth showed that long-term fertilization had significant effects on crop yield and available nutrients in soil plow (P <0.05). Compared with the pre-test soil, the application of organic fertilizer can significantly increase the crop yield and soil nutrient content; when organic fertilizer and inorganic fertilizer with the application of significantly greater than the role of fertilizer alone. Fertilizers alone can increase the yield of crops and the effective nutrients of the soil, but the increase is not large. After 27 years of fertilization, the yield of different treatments and the available nutrients in the soil changed to some extent. With the extension of the year, the crop yield and the content of available nutrients in the soil increased to a certain extent, and there was no significant difference between the treatments difference.