污泥堆肥在园林绿地的利用

The Application of Sewage Sludge Compost to City Gardens and Turfgrass Lands.

污泥含有Ｎ、Ｐ、Ｋ及多种微量元素和大量有机质，可用作肥料和土壤改良剂而具有正效应；同时也含有病原菌、寄生虫（卵）、重金属、盐分及某些难分解的有机毒物而有负效应。将其堆肥化处理可减小重金属的活动性，病原菌、寄生虫（卵）被杀灭，物理性状也显著改善。把它用于园林绿地，可使植物产生良好的生长响应。只要使用方法得当，重金属、盐分，ＮＯ_３￣－－Ｎ淋溶及地面径流等环境问题均可得到解决。

Abstract Sewage sludge contains plenty of organic matter and N,P,K as well as many kinds of trace elements.It can be used as a fertilizer and soil conditioner for plant growth.On the other hand,sewage sludge contains some disease-causing organisms,heavy metals,salts as well as trace amount of organic compounds,which make it have a negative effect.After it was applied to gardens and turfgrass lands,plants had a good response to the compost.If it was used properly,there were no snch problems as heavy metals toxicity to food chain,salt injuring to plants and -N-contamination to gronndwater,etc.