摘要
叙述了发达国家将城市污泥施用于林地改善土壤的微生物活动和数量,提高土壤的可利用性,N,P,K,有机质的含量以及促进林木生长的研究状况及中国在这方面的研究现状,指出,污泥林地利用存在着污染地下水、增加土壤重金属和有害化学物质等环境风险,认为有必要开展对土地的承载能力、树木的敏感程度、食物链风险、树木需肥量等综合因素的研究。
It has been a main method using sewage sludge compost in forestland in developed countries.Sewage sludge compost can increase activity and amount of forest soil microbe,improve the contents of available N,P and K,but on the other hand it may pollute the underground water with some heavy metals and noxious substances.Now it is origination using sludge compost in forestland in china and it is essential to study comprehensive factors,such as the carrying capacity of land,the sensitivity of the trees,food chain risk and volume of fertilizer to determine a reasonable application rate,the application of methods and application time.
出处
《山西能源与节能》
2010年第6期67-69,共3页
Shanxi Energy and Conservation
关键词
城市污泥
林地
重金属
municipal sludge
forestland
heavy metals
