城市垃圾堆肥及其复混肥对草坪草生长及土壤环境的影响

Effects of Municipal Waste Compost and Its Compound Fertilizers on Grass and Soils

采用盆栽试验,研究比较了城市垃圾堆肥及其不同种类复混肥在不同施肥水平施用下对草坪草及土壤环境的影响。结果表明,施用垃圾堆肥及复混肥能够改善土壤的理化性质,增加土壤有机质和养分含量,其中以复混肥1的各施肥处理效果最明显,与其他相应施肥量处理相比差异显著;草坪获得良好的生长响应,草坪生物量增加,绿期延长;土壤重金属含量增加,除了垃圾堆肥高量施肥处理时Cu的含量超过了土壤环境一级标准外,其余都小于土壤环境质量一级标准,不会造成土壤重金属污染;按照《地下水质量标准》,对不同雨强、覆盖状况、时段条件下渗滤液中重金属元素浓度进行评价,得出所有渗滤液均达到了国家规定的三类水质,部分甚至达到一类水质,不会对人类饮用水造成污染。

Effects of municipal waste compost and its compound fertilizers on grass and soils were studied by pot experiments. The soil physical and chemical characters were improved after the application of municipal waste compost and its compound fertilizers, with the increasing of organic matter and nutrition content. Soil fertility was improved significantly in all treatments with compound fertilizer 1. Grass biomass was increased and the green period was extended with a better growth of the lawn. The heavy metal contents in the soil were also increased, but except for content of Cu under the highest fertilization rate with waste compost, contents of other heavy metals were less than the first standard of soil environment, and the soil was not contaminated. According to the Quality Standard of Underground Water Environment published by State Intendance Administration of China, contents of heavy metals in the leachate were respectively under the third level standard, and parts of them were below the first level. So, application of municipal waste compost and its compound fertilizers would not lead to the pollution of underground water.