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通过田间试验研究了冬小麦收获后NO3--N在土壤剖面中的累积状况。研究结果表明:不论是单独施用无机、生物有机肥还是无机、有机肥混施都会造成硝酸盐在土壤中的积累,但有机肥本身产生的硝酸盐累积量极微。生物有机、元机肥混施后减少了无机肥料中硝态氮深层累积。在0-100cm土层中,硝态氮的累积量呈递减趋势,在0-40cm的累积量最高。砂质土壤比牯质土壤更有利于硝态氮的深层迁移。
Field experiment was conducted to study the accumulation of NO3 - N in soil profiles after winter wheat harvest. The results showed that the nitrate accumulation in the soil was caused by the combination of inorganic and organic fertilizers alone or in combination with inorganic and organic fertilizers. However, the accumulation of nitrate in the organic fertilizer itself was minimal. Bio-organic fertilizer and organic fertilizer reduce the inorganic nitrate fertilizer deep accumulation of nitrate. In the 0-100cm soil layer, the accumulation of nitrate nitrogen showed a decreasing trend, with the highest accumulation at 0-40cm. Sandy soil is more favorable to the deep nitrate nitrogen migration than icy soil.