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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:

21卷

期数:

2015年04期

页码:

725-732

栏目:

研究论文

出版日期:

2015-08-25

文章信息/Info

Title:

The remediation characteristics of Pennisetum spp. on Cd contaminated soil

作者:

王丽萍;  张健;  胡红玲;  张如意;  蒋晓梅;  何书惠;  宋君祥;  张学才

1四川农业大学林学院生态林业研究所，生态林业工程重点实验室 成都 611130 2四川农业大学林学院 成都 611130 3四川盈基新能源投资有限公司 成都 610000

Author(s):

WANG Liping;  ZHANG Jian;  HU Hongling;  ZHANG Ruyi;  JIANG Xiaomei;  HE Shuhui;  SONG Junxiang;  ZHANG Xuecai

1Key Laboratory of Ecological Forestry Engineering, Institute of Ecology & Forestry, Sichuan Agricultural University, Chengdu 611130, China 2College of Forestry, Sichuan Agricultural University, Chengdu 611130, China 3Sichuan Yingji New Energy Investment Co. LTD, Chengdu 610000, China

关键词:

巨菌草; Cd胁迫; 生长特性; 富集特性; 土壤类型

Keywords:

Pennisetum spp.;  Cd stress;  growth characteristics;  bioaccumulation characteristics;  soil type

分类号:

X53 : X173

DOI:

10.3724/SP.J.1145.2015.04042

文献标志码:

A

摘要:

通过盆栽试验研究四川盆地3种典型土壤类型（冲积土、紫色土和黄壤）下不同浓度镉（Cd）胁迫（CK：0 mg/kg；T1：20 mg/kg；T2：50 mg/kg；T3：100 mg/kg）对巨菌草的生长特性以及土壤中Cd富集特征的影响. 结果显示：较低浓度（T1）的Cd处理并未对巨菌草的生长造成显著的影响，而较高浓度（T2、T3）的Cd胁迫严重抑制了巨菌草的生长；巨菌草的株高、各器官生物量以及总生物量均表现出随着处理浓度的增加而降低的趋势；同一Cd处理浓度下，不同土壤类型中巨菌草株高、各部分生物量以及总生物量均表现为冲积土＞紫色土＞黄壤. 3种土壤中巨菌草根、茎和叶的Cd含量随着土壤Cd浓度的增大而显著增加，且表现为根＞叶＞茎，同时地下部分＞地上部分；同一Cd处理浓度下，巨菌草各器官Cd含量均表现为黄壤＞紫色土＞冲积土，且与其他两种土壤相比，黄壤中生长的巨菌草具有较大的富集系数和转移系数，表明巨菌草在黄壤中表现出较好的吸收富集作用. 各处理浓度下，巨菌草对Cd均表现出一定的吸收和富集特征，尽管巨菌草富集系数和转移系数小于1，但其对Cd具有较强的耐性，且地上部分Cd累积量在T3处理下最高达到1.24 mg/株. 本研究表明巨菌草在Cd污染土壤的植物修复方面具有一定的应用潜能. 图4 表3 参44 关键词 CLC

Abstract:

To study the effect of Cd stress on growth characteristics and Cd accumulation of Pennisetum spp. in three typical soil types of Sichuan (alluvial soil, purple soil and yellow soil), a pot experiment was conducted with four levels of Cd treatment (CK: 0 mg/kg; T1: 20 mg/kg; T2: 50 mg/kg; T3: 100 mg/kg). The results showed that higher Cd concentration (T2, T3) influenced the growth of Pennisetum spp. significantly, but low Cd concentration (T1) had no significant effects. The height, organ biomass and total biomass decreased with the increase of Cd concentration and showed an order of alluvial soil ? purple soil ? yellow soil under the same Cd concentration. The Cd content of root, stem and leaf showed a significant increasing tendency with the increase of Cd concentration with an order of root ? leaf ? stem in the three soil types. In addition, the Cd content of above ground parts was less than that of root, with the Cd content in each organ of Pennisetum spp. higher in yellow soil than the other two soil types. The bioaccumulation coefficient and tolerance index of Pennisetum spp. cultivated in yellow soil was higher than in other soil types, suggesting that Pennisetum spp. had a better repairing effect in the Cd polluted yellow soil. Pennisetum spp. had certain absorption and bioaccumulation characteristics in Cd contaminated soil, even with enrichment coefficient and transfer coefficient less than 1; it showed strong tolerance to Cd with Cd accumulation up to 1.24 mg/plant under T3 treatment. The results indicated that Pennisetum spp. has certain potential application value in phytoremediation of Cd contaminated soil.

备注/Memo

备注/Memo:

国家自然科学基金项目（31370628）、国家科技支撑计划项目（2011BAC09B05）、四川省科技支撑计划项目（2013SZ0067、2011SZ0239）、四川省科技厅应用基础项目（2012JY0047）和四川省教育厅科技创新团队计划项目（11TD006）资助 Supported by the National Natural Science Foundation of China (31370628), the National Sci-tech Pillar Project of China (2011BAC09B05), the Sichuan Sci-tech Pillar Project (2013SZ0067, 2011SZ0239), the Application Foundation Project of Sichuan Department of Science and Technology (2012JY0047) and the Innovation Team Program of Sichuan Education Department (11TD006)

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更新日期/Last Update: 2015-08-25