论文部分内容阅读
于１９８７～１９８９年在苏州黄泥土菜田和粮田上设置试验。结果表明，施用一定量城市生活污泥对土壤有机质、土壤腐殖化程度、土壤结构性等均有明显的提高和改善，效果优于猪、牛粪。污泥对土壤残留氮累积、残留水解氮增加，以及全磷与速效磷含量均有明显的效果。施用污泥能显著促进土壤代谢强度，表现在土壤呼吸强度提高，微生物总量及放线菌所占比例大增，但对土壤固氮菌影响较小，而对硝化菌、反硝化菌有较大影响。合理施用符合控制标准的污泥有利于提高土壤肥力水平。
From 1987 to 1989, experiments were set up on the vegetable fields and grain fields of yellow soil in Suzhou. The results showed that the application of a certain amount of municipal sludge on the soil organic matter, soil humification degree, soil structure were significantly improved and improved, the effect is better than pigs, cow dung. Sludge on soil residual nitrogen accumulation, residual hydrolysis of nitrogen increased, as well as total phosphorus and available phosphorus content have a significant effect. Sludge application can significantly promote the soil metabolic intensity, which shows that the soil respiration intensity increases, the total amount of microorganisms and the proportion of actinomycetes increase greatly, but has little effect on soil nitrogen-fixing bacteria, but has a greater effect on nitrifying bacteria and denitrifying bacteria influences. The rational application of sludge that meets the control standards is conducive to raising soil fertility.