摘要
以槐叶决明(Cassia sophera)"茶肥1号"为材料,采用盆栽法研究了不同浓度(0、5、10、20、40、80、120、160mg·kg^(-1))镉(Cd)胁迫对"茶肥1号"生长及Cd吸收积累特性的影响。结果表明:土壤中添加0~160mg·kg^(-1) Cd,随Cd胁迫浓度的增加,各器官生长量受到明显抑制。"茶肥1号"各器官Cd含量与Cd胁迫浓度、土壤有效态Cd含量均呈显著正相关关系(P<0.05),各器官Cd积累量顺序为根>茎>叶。土壤中Cd元素大部分被根固定,向地上部运输的比例较低,说明"茶肥1号"植株根部最易受到Cd毒害。随着Cd浓度的增加,"茶肥1号"的种子Cd累积量增加缓慢。本研究在较高的Cd胁迫浓度条件下,"茶肥1号"在较短的时期内对Cd具有明显的富集作用,其根、茎、叶中浓度分别为113.85、20.15、7.00mg·kg^(-1)。因此,"茶肥1号"可作为土壤修复类的植物,在污染地区种植,对环境保护与田地污染治理有重要的意义。
The growth,absorption,and accumulation of Chafei 1#（Cassia sophera）under different cadmium（Cd）concentrations（0,5,10,20,40,80,120,160 mg·kg^-1）were investigated using the pot experiment.The results showed that upon adding 0-160 mg·kg^-1 Cd in soil,the growth of various organs were significantly inhibited along with increasing concentrations of Cd.There were significant positive correlations between Cd content in organs and Cd stress,and Cd content in organs and available Cd content（P〈0.05）.The order of Cd content in various organs was root〉stem〉leaf;in addition,most of the Cd was fixed by the roots in the soil,so less Cd was transported from the soil to the upper part,indicating that the roots of Chafei 1# were vulnerable to Cd toxicity.Although the Chafei 1# was treated with a high concentration of Cd,in a short time,there was an obvious enrichment in Cd as Cd stress increased,as the content in the root,stem,and leaf were 113.85,20.15,and 7.0 mg·kg^-1,respectively.Therefore,Chafei 1#could be planted in polluted areas as soil remediation plants,which are of great significance to environmental protection and in control measures for polluted cultivated land.
作者
向芬
李维
刘红艳
周凌云
丁玎
曾振
Xiang Fen;Li Wei;Liu Hong-yan;Zhou Ling-yun;Ding Ding;Zeng Zhen(Tea Research Institute of Hunan Academy of Agricultural Sciences,Changsha 410125,Hunan,China)
出处
《草业科学》
CAS
CSCD
2018年第7期1679-1684,共6页
Pratacultural Science
基金
国家重点研发计划(2016YFD0200904)
湖南农业科技创新资金项目(2017JC17)
关键词
“茶肥1号”
镉
累积
吸收系数
富集系数
茶园
Chafei 1#
cadmium
accumulation
green manure
coefficient of absorption
enrichment coefficient
tea plantation
