土壤中六氯苯的老化特征及其在蚯蚓体内的富集规律

应用生态学报

土壤中六氯苯的老化特征及其在蚯蚓体内的富集规律

郜红建^1,2;蒋新²

¹安徽农业大学资源与环境学院，合肥 230036;²中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室，南京 210008

收稿日期:2008-08-09 修回日期:1900-01-01 出版日期:2009-03-20 发布日期:2009-03-20

Hexachlorobenzene: Its aging characteristic in different soils and accumulation in earthworm.

GAO Hong-jian¹;JIANG Xin²

¹School of Resources and Environmental Science, Anhui Agricultural University, Hefei 230036, China;²State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China

Received:2008-08-09 Revised:1900-01-01 Online:2009-03-20 Published:2009-03-20

摘要/Abstract

摘要： 采用室内模拟试验，研究了不同土壤中六氯苯的老化特征及其在蚯蚓体内的生物富集规律. 结果表明：六氯苯在不同土壤中的老化过程呈现出先快后慢的二阶段特征，即在初始的60 d内，六氯苯老化速率较快, 随后老化趋势减缓.六氯苯在土壤中的老化作用主要发生在与土壤初始接触的60 d内，其老化速率呈现水稻土>红壤>潮土的规律.六氯苯在蚯蚓体内的生物富集量和生物富集系数也随着老化时间的延长而逐渐降低. 虽然六氯苯在土壤中的可提取态含量随着老化时间延长而下降，但在蚯蚓体内有较高的生物富集量(457.6～984.3 ng·g^-1)和一定的生物富集能力(生物富集系数BAF在3.74～6.35)，仍会对土壤生态安全构成潜在威胁.

关键词: 光合生理, 107杨, 染液导入, 液流速率

Abstract: A simulation experiment was conducted to study the aging characteristics of hexachlorobenzene (HCB) in different soils and its bioaccumulation in earthworm. The results indicated that the aging of HCB in soils displayed a biphasic characteristic, i.e., quicker in the first 60 days and slowing down since then. The aging of HCB mainly occurred in the first 60 days during its contact with soil, and its aging rate in soils followed the sequence of paddy soil>red soil>fluvo-aquic soil. The accumulated amount and accumulation rate of HCB in earthworm decreased with increasing aging time. Though the soil extractable HCB decreased with increasing aging time, earthworm still had a higher HCB accumulation (4576〖KG-*2〗-〖KG-*7〗9843 ng·g-1) in its body due to its high HCB accumulation ability (the bioaccumulation factor BAF was between 374 and 635), giving a potential risk to soil ecological safety.

Key words: photosynthetic physiology, sap flow rate, Populus ×euramericana cv. ‘74/76’, dye solution introduction

郜红建^1,2;蒋新². 土壤中六氯苯的老化特征及其在蚯蚓体内的富集规律[J]. 应用生态学报.

GAO Hong-jian¹;JIANG Xin². Hexachlorobenzene: Its aging characteristic in different soils and accumulation in earthworm.[J]. Chinese Journal of Applied Ecology.

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