摘要
采用温室盆栽试验的方法,研究了城市污泥好氧堆肥对绿化土壤化学特性、香樟树生长、重金属含量的影响。试验共设6个处理过程,CK代表对照处理(供试土壤),施用10%、15%、20%、25%、30%的污泥。结果表明:随着污泥比例的增加,土壤有机质、全氮、全磷明显增加,pH值明显降低。空白处理中含有的铜、锌、铬、铅随着污泥添加量的增加而逐步升高,锌和铜的含量增加最为明显。香樟在污泥25%、30%比例时,叶绿素含量、株高达最大值。香樟树对锌元素有较强的富集作用,对铜的吸收仅低于锌。总体而言,污泥施用后,可明显提高绿化土壤有机质及全氮全磷含量。
An experiment using pots in greenhouse was conducted to study the effects of sewage sludge （MSS） on soil chemical properties, growth of cinnamomum hupehanum and heavy metal contents in cinnamomum hupehanum. The experiment made six treatments：Control （no application of MSS）, percentage of MSS as follows： 10 %, 15 %, 20 %, 25 %, 30 %, respectively. Results showed that with the increase of MSS, soil organic carbon, TN and TP were significantly increased, while pH was significantly decreased. Cu, Zn, Cr and Rb increased with the increasing of MSS dosage, in which Zn and Cu increased significantly. Chlorophyll contents in leaves and growth height of cinnamomum hupehanum reaches the maximum at 25 % and 30% sewage sludge content. The enrichment of heavy metals in cinnamomum hupehanum first is Zn,then Cu. In a word, the results iudieats that the application of MSS can obviously increase soil organic carbon and the contents of TN and TP.
出处
《净水技术》
CAS
2011年第3期61-66,共6页
Water Purification Technology
关键词
城市污泥
土壤化学特性
香樟树
重金属富集
sewage sludge soil chemical properties cinnamomum hupehanum heavy metal enrichment
