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三年田间试验结果表明,在等氮量条件下,有机肥与无机肥配合施用的各处理的土壤有机质含量显著高于无机氮处理。砂滤管试验的结果表明,供试有机物料的腐殖化系数为0.13～0.57;有机物料能显著增加土壤有机碳和重组有机碳含量,促进土壤有机-无机复合体的形成,提高土壤增值复合量和增值复合度,改善腐殖质结合形态,使松结态组分增加,紧结态组分减少,土壤腐殖质得到活化。结果还表明,供试白土有机质的年矿化量约为145kg/亩,由作物根茬形成的土壤有机质约为105kg/亩,每年每亩施1600kg厩肥或300kg干稻草方能保持土壤碳素的平衡。
The result of field experiment in three years showed that the organic matter content of soil treated with organic manure and inorganic fertilizer was significantly higher than that of inorganic nitrogen treatment under the condition of equal nitrogen. The result of sand filter test showed that the humification coefficient of the tested organic material was 0.13-0.57. The organic material could significantly increase the contents of soil organic carbon and organic carbon, promote the formation of soil organic-inorganic complex and increase the value-added composite of soil Quantity and value of the degree of compound, to improve the combination of humus morphology, the pine junction component increased, tight junction components decreased, soil humus activated. The results also showed that the annual mineralization of organic matter in the test soil was about 145kg / mu. The soil organic matter formed by crop stubble was about 105kg / mu, and 1600kg manure or 300kg dry straw per mu per year could maintain the soil carbon balance.