外源铁对铅污染土壤中宽叶香蒲铅积累的影响

应用生态学报

外源铁对铅污染土壤中宽叶香蒲铅积累的影响

钟顺清¹,徐建明^2，3**

(¹衡阳师范学院资源环境与旅游管理系, 湖南衡阳 421008; ²浙江大学土水资源与环境研究所, 杭州 310058； ^3浙江省亚热带土壤与植物营养重点实验室，杭州 310058)

出版日期:2013-01-18 发布日期:2013-01-18

Effects of exogenous iron on lead accumulation in Typha latifolia from a lead-contaminated soil.

ZHONG Shun-qing¹, XU Jian-ming^2，3

(¹Department of Resource Environment and Tourism Management, Hengyang Normal University, Hengyang 421008, Hunan, China; ²Institute of Soil and Water Resource and Environmental Science, Zhejiang University, Hangzhou 310058, China； ³Zhejiang Province Key Laboratory of Subtropic Soil and Plant Nutrition, Hangzhou 310058, China)

Online:2013-01-18 Published:2013-01-18

摘要/Abstract

摘要： 采用温室盆栽方法，研究添加外源铁对不同铅浓度(0、100、500和1000 mg·kg^-1)污染土壤中宽叶香蒲铅积累的影响.结果表明：各铅浓度条件下，与添加100 mg Fe·kg^-1相比，添加500 mg Fe·kg^-1处理的宽叶香蒲地上部和根的铅含量均增高.土壤铅浓度为1000 mg·kg^-1时，添加500 mg Fe·kg^-1处理根的铅含量比100 mg Fe·kg^-1处理增加33.7%，地上部铅含量增加50.5%.添加500 mg Fe·kg^-1处理的根际土壤中可交换态铅比100 mg Fe·kg^-1处理增加77.0%～114.6%.除500 mg·kg^-1铅浓度外，各铅浓度条件下添加500 mg Fe·kg^-1理根干质量均显著低于100 mg Fe·kg^-1处理.在铅污染的湿地环境中添加适量铁可以提高铅的有效性，促进铅积累.

Abstract: A pot experiment was conducted to study the effects of adding 100 and 500 mg·kg^-1 of exogenous iron (Fe) on the lead (Pb) accumulation in Typha latifolia growing on a soil with 0, 100, 500 and 1000 mg·kg^-1 of Pb, respectively. In treatment 500 mg Fe·kg^-1, the Pb concentration in T. latifolia shoots and roots was higher, compared with that in treatment 100 mg Fe·kg^-1. When the soil Pb concentration was 1000 mg·kg^-1, the Pb concentration in T. latifolia shoots and roots in treatment 500 mg Fe·kg^-1 increased by 33.7% and 50.5%, respectively, compared with that in treatment 100 mg Fe·kg^-1. The exchangeable Pb concentration in rhizosphere soil was 77.0%-114.6% higher in treatment 500 mg Fe·kg^-1 than in treatment 100 mg Fe·kg^-1. When the soil Pb concentration was 0, 100 and 1000 mg·kg^-1, the root dry mass in treatment 500 mg Fe·kg^-1 had a significant decrease, compared with that in treatment 100 mg Fe·kg^-1. It was suggested that adding appropriate amount of Fe to Pb contaminated wetland soil could increase the availability of soil Pb and improve the Pb accumulation in plants.

钟顺清1,徐建明2，3**. 外源铁对铅污染土壤中宽叶香蒲铅积累的影响[J]. 应用生态学报.

ZHONG Shun-qing1, XU Jian-ming2，3. Effects of exogenous iron on lead accumulation in Typha latifolia from a lead-contaminated soil.[J]. Chinese Journal of Applied Ecology.