混合污泥堆肥在无锡茶园的应用研究  

Application of Municipal Sewage Sludge in Tea Garden in Wuxi

作　　者：徐雪云[1] 朱航[1] 邹华[2] 

机构地区：[1]无锡市广播电视大学园艺教研室,江苏无锡214011 [2]江南大学环境与土木工程学院,江苏无锡214122

出　　处：《华南农业大学学报》2013年第2期277-280,共4页Journal of South China Agricultural University

基　　金：国家自然科学基金(20707007)

摘　　要：为了探索城市污泥的施用方法,研究茶园中施用污泥的效果及安全性,测定了无锡市5家污水处理厂污泥中的重金属含量.结果表明:各处理厂污泥中重金属含量差异很大,单独施用有很大的安全隐患,但混合施用,安全性增加.将混合污泥堆肥施用于茶园,并测定茶树的芽头密度、百芽质量和茶叶中的重金属含量.结果显示:荼园中连续2年施用污泥后,茶树芽头密度为1 385只/m2、百芽质量为54.2 g,分别比空白对照组增加29.2%、33.5%;茶叶中铅、铜质量分数分别由施用前的2.81、18.3 mg/kg上升为3.23、21.1 mg/kg,存在一定的安全隐患,因而不建议在茶园中连续施用污泥堆肥.The municipal sewage sludge(MSS) was applied to tea garden to assess its effectiveness and safety.The level of heavy metals in MSS from five wastewater treatment plants in Wuxi was measured.MSS was applied in the tea garden.The bud density,mass per hundred buds,and heavy metal in tea leaves were determined.A large difference in the level of heavy metals in MSS from five plants was identified.There might be a high risk if MSS from each wastewater treatment plant was applied individually.However,the safety degree could increase if the MSS from five plants were mixed before their application.After two consecutive years' application of MSS in tea garden,bud density and mass per hundred buds were 1 385 unit/m2 and 54.2 g respectively,the increase being 29.2% and 33.5% respectively compared with the control group.After the sewage application,the lead and copper content in the tea leaves increased to 3.23 and 21.1mg/kg from the initial values of 2.81 and 18.3 mg/kg.So it is not recommendable to apply MSS in tea garden in consecutive years.

关 键 词：茶园 污泥 重金属 安全性 

分 类 号：S142.9[农业科学—肥料学] S571.1[农业科学—农业基础科学]