| 摘要: |
| 塿土施污泥对小麦干物质增重为16.2%～74.2%。污泥施量＜2%土重时，对小麦苗期生长无任何不良影响，植株茎叶中Cu，Pd，Cd含量均与对照相近，Zn，Ni略高于对照，但亦在正常范围之内；污泥施量＞2%土重时，小麦地上部分虽然生长正常，但根系生长受到明显抑制，植株体内重金属含量明显增加，其分布为根系＞茎叶。Zn、Cu在茎叶中累积能力较强，Pd，Ni主要聚积在根系里。塿土施污泥量以2%土重（折合45 t/hm2）生物效应最佳。 |
| 关键词: 塿土，污泥，重金属，小麦生长 |
| DOI： |
| 分类号:S512.106.2 |
| 基金项目: |
|
| The Effects of Applying Sewage Sludge to Manural Loess Soil on Wheat Growth |
|
Xiao Ling Li Gang Hao Weiping,Xiao Ling Li Gang Hao Weiping,Xiao Ling Li Gang Hao Weiping
|
| Abstract: |
| The applieation of semage sludge to manural loess soil increased Wheat
dry matter by 16.2%一74.2%.When the amounts of sewage sludge applied were less
than 2%,no negative results were found to wheat seedlings,and the contents of Cu,Pb
and Cd in wheat shoots Were close to those in the control.Although the contents of Zn
and Ni were slightly higher than those in the control,they were still in a normal range.
However,when the amounts of sewage sludge used were more than 2%,the root growth
was signifieantly inhibited though the upper parts of wheat above the ground grew normally,and the contents of heavy metal were markedly inecreased in plants,whose distribution was higher in roots than in shoots as a whole.Comparatively,Zn and Cd were accumulated more in shoots while Pb and Ni in roots.Applieation of 2% of sewage sludge
(to be converted into 45 tons per hectare)is proposed to the Lou soil,the bio-effects are
the best. |
| Key words: Manural Loess soil,sewage sludge, heavy metal,wheat growth |
