论文部分内容阅读
１７ａ长期定位试验结果表明，施用有机肥可明显提高土壤腐殖质含量，并使腐殖质的氧化稳定性降低；而施用无机肥在本定位试验并没有导致土壤腐殖质下降，反而稍有提高，但腐殖质的氧化稳定性与无肥处理相当。从腐殖质分组组成看，施有机肥可明显增加游离态钙结合态腐殖质含量。对于土娄土，施肥对二三氧化物结合态腐殖质影响不大。从结合形态看，有机肥和无机肥虽然都使松结态、稳结态、紧结态腐殖质的绝对数量有所增加，但相对数量（各结合态占总碳比例）却有不同变化。另外有机肥可使土壤松紧比值提高，而无机肥使松紧比值下降
17a long-term positioning test results show that the application of organic fertilizer can significantly increase the soil humus content, and to reduce the oxidation stability of humus; and application of inorganic fertilizer in this positioning test did not lead to soil humus decreased, but slightly increased, but the humus oxidation Stability and no fertilizer treatment. From the composition of the humus group, organic manure can significantly increase the free calcium bound humus content. For soil, soil fertilization has little effect on the bound humus of dioxins. In terms of the combination form, although both organic fertilizer and inorganic fertilizer make loosely bound and steady-state, the absolute amount of tight-junction humus increases, but the relative quantity (the total carbon content of each bound state) varies. In addition organic fertilizers can make the soil elastic ratio increased, while the inorganic fertilizer to reduce the elastic ratio