乙草胺对东北黑土铅形态及生物有效性的影响

应用生态学报 ›› 2004, Vol. ›› Issue (10): 1883-1886.

乙草胺对东北黑土铅形态及生物有效性的影响

周启星^1,2, 孙福红¹, 郭观林¹, 孙铁珩^1,2

1. 中国科学院沈阳应用生态研究所陆地生态过程重点实验室, 沈阳 110016;
2. 沈阳大学沈阳环境工程重点实验室, 沈阳 110041

收稿日期:2004-02-02 修回日期:2004-04-13 出版日期:2004-10-15
通讯作者: 周启星,男,1963年5月生,博士,研究员,教授,博士生导师.E-mail:Zhouqx@iae.ac.cn或Zhouqixing2003@yahoo.com
基金资助:
国家杰出青年科学基金项目(20225722);国家自然科学基金重点资助项目(20337010)

Influence of acetochlor on Pb forms and their bioavailability in phaiozem of northeast China

ZHOU Qixing^1,2, SUN Fuhong¹, GUO Guanlin¹, SUN Tieheng^1,2

1. Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
2. Shenyang Key Laboratory of Environmental Engineering, Shenyang University, Shenyang 110041, China

Received:2004-02-02 Revised:2004-04-13 Online:2004-10-15

摘要/Abstract

摘要： 通过清洁黑土和污染黑土的形态分级分析和黑土铅对乙草胺的响应实验,对东北黑土铅形态及其乙草胺使用的生物有效性响应进行了研究.结果表明,清洁和污染黑土中的铅均主要以有机质-硫化物结合态铅和残渣态铅这2种生物有效性低的形态为主,而水溶态铅和可交换态铅这2种具生物学活性的铅含量则相对较低.与清洁黑土相比,污染黑土中具生物学活性的铅含量所占总铅含量的比例有所上升.随着农业活动中施入高剂量的乙草胺这一除草剂,黑土中具生物学活性的水溶态和可交换态铅的含量则大幅上升.据分析,其原因是铅在与乙草胺交互作用过程中来自有机质-硫化物结合态铅释放对有效态铅的贡献.

关键词: 黑土, 铅, 生物有效性, 乙草胺, 污染土壤

Abstract: By using Pb-fractionation analytical methods and Pb-acetochlor response experiments,it was studied the Pb forms in clean and polluted phaiozems of northeast China and the response of Pb bioavailability to acetochlor application.The results showed that the dominant Pb forms in these soils were low bio-available organic-sulfide Pb and residual Pb,and the concentrations of high bio-available water-soluble and exchangeable Pb were relatively low.However,the ratio of bio-available Pb to total Pb was lower in polluted phaiozem than in clean phaiozem.The bioavailability of Pb in the soil was obviously increased after high dose of acetochlor was applied.The main reason was the contribution of organic-sulfide Pb to bio-available Pb interacted with acetochlor.

Key words: Phaiozem, Pb, Bioavailability, Acetochlor, Contaminated soil

中图分类号:

周启星, 孙福红, 郭观林, 孙铁珩. 乙草胺对东北黑土铅形态及生物有效性的影响[J]. 应用生态学报, 2004, (10): 1883-1886.

ZHOU Qixing, SUN Fuhong, GUO Guanlin, SUN Tieheng. Influence of acetochlor on Pb forms and their bioavailability in phaiozem of northeast China[J]. Chinese Journal of Applied Ecology, 2004, (10): 1883-1886.

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