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通过8年长期定位试验,研究了不同施肥方式对褐土有机无机复合状况及腐殖质结合形态的影响。结果表明,长期不施肥使土壤有机碳、重组有机碳、原土复合量、松结态和紧结态有机碳含量明显下降,松/紧值降低,原土复合度上升;长期单施常量NPK化肥有同样的趋势;长期单施增量NPK化肥可大体保持土壤肥力水平不下降,但成本较高;采用有机肥(物)料配施常量NPK化肥,可明显提高土壤有机碳、重组有机碳含量和原土复合量以及土壤松、稳、紧各级结合态有机碳含量,增加松结态占重组有机碳比率,提高松/紧值,增强土壤调控能力。土壤有机无机复合状况及腐殖质结合形态是评价褐土培肥效果和标志土壤肥力演变的重要指标。
Through 8-year long-term experiment, the effects of different fertilization modes on the organic-inorganic complex and humus-binding morphology of the cinnamon soil were studied. The results showed that the long-term non-fertilization of soil organic carbon, organic carbon, soil original compound, pine knot and tight knit organic carbon content decreased significantly, loose / tight value decreased, the original soil compound increased; long-term single application of constant NPK The same trend of chemical fertilizers; long-term single application of NPK fertilizer can generally maintain the level of soil fertility does not decline, but the cost is higher; using organic fertilizer (material) with constant NPK fertilizer can significantly increase soil organic carbon, recombinant organic carbon content and The amount of original soil compost and the amount of bound organic carbon at the soil loose, steady and tight levels, increase the proportion of loosely knoWn organic carbon, increase the loose / tight value, and enhance the ability of soil regulation and control. Soil organic-inorganic composite and humus-binding morphology are important indicators to evaluate the effects of brown soil fertilization and soil fertility evolution.