论文部分内容阅读
城市分散式粪便的处理已经成为现代化城市管理的一个难题.本研究在将城市分散式粪便经收集、除渣、絮凝脱水后制成颗粒肥;通过盆栽小青菜试验,评价了不同施肥量对小青菜的增产效果以及对土壤、淋溶水性质的影响,探讨了颗粒肥用于叶菜施肥的可行性.结果表明,施用颗粒肥可显著提高小青菜产量,试验条件下未对小青菜叶片造成大肠杆菌、大肠菌群等病原菌污染;在适当比例的施肥水平下,颗粒肥施用后淋溶水中的病原菌浓度低于对照组.施用颗粒肥能显著提高土壤氮、磷、钾、有机质等营养物质含量,提高土壤孔隙度水平,降低土壤容重,改善土壤理化性质;同时颗粒肥施用不会对土壤和淋溶水造成重金属离子污染,且能有效降低土壤氮、钾的淋溶.
Disposal of urban manure has become a modern city management problems.This study will be in the city after the collection of scattered manure, slag, flocculation dehydration made of granulated fertilizer; Potted cabbage test to evaluate the different amount of fertilizer on the small The results showed that the application of granular fertilizer can significantly increase the yield of small green vegetables, under the conditions of the experiment did not cause the small green leaf Escherichia coli, coliform bacteria and other pathogenic bacteria contamination; Under the appropriate fertilization level, the concentration of pathogenic bacteria in leachate after application of granular fertilizer was lower than that of the control group. Application of granular fertilizers could significantly increase soil nitrogen, phosphorus, potassium, organic matter and other nutrients Content, increase the level of soil porosity, reduce the bulk density of soil, and improve the physical and chemical properties of soil. At the same time, application of granular fertilizer will not cause heavy metal ions pollution in soil and leaching water, and can effectively reduce the leaching of soil nitrogen and potassium.