引用本文:高文文,刘景双,王 洋. 有机质对冻融黑土重金属Zn赋存形态的影响[J]. 中国生态农业学报(中英文), 2010, 18(1): 147-151
GAO Wen-Wen,LIU Jing-Shuang,WANG Yang. Effect of organic matter on fractional transformation of Zn in black soils under freeze-thaw cycle[J]. Chinese Journal of Eco-Agriculture, 2010, 18(1): 147-151
DOI:10.3724/SP.J.1011.2010.00147
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有机质对冻融黑土重金属Zn赋存形态的影响
高文文1,2, 刘景双3, 王 洋3
1. 中国科学院东北地理与农业生态研究所 长春 130012;2. 中国科学院研究生院 北京 100049;3.中国科学院东北地理与农业生态研究所 长春 130012
摘要:  冻融作用对不同有机质含量的土壤重金属Zn赋存形态转化产生显著影响, 以24 h为1个冻融周期, 对150 mg (Zn)·kg-1的黑土冻融8次, 结果表明, 随着有机质含量的增加, 未经冻融土壤的交换态和铁锰氧化物结合态Zn含量逐渐降低, 有机结合态Zn含量逐渐增加, 残渣态Zn含量变化不显著。冻融作用可促进交换态和铁锰氧化物结合态Zn含量降低, 促进有机结合态和残渣态Zn含量增加。随着土壤有机质含量的增加, 冻融作用使重金属Zn生物有效态含量降低。通过有机质含量与各形态Zn含量拟合, 在未冻融和冻融条件下, 各形态Zn含量与有机质含量之间呈二次多项式的函数关系, 相关系数r2在0.664和0.995之间
关键词:  重金属Zn 形态转化 冻融交替 有机质 黑土
中图分类号:
基金项目:国家重点基础研究发展计划(973计划)项目(2004CB418507)和中国科学院东北地理与农业生态研究所前沿领域项目(KZCX3-SW-NA3-14)
Effect of organic matter on fractional transformation of Zn in black soils under freeze-thaw cycle
GAO Wen-Wen1,2, LIU Jing-Shuang3, WANG Yang3
1. Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012, China;2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China;3.Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012, China
Abstract:  Freeze-thaw cycle (FTC) has a strong influence on fractional transformation of the heavy metal Zn in soils with different contents of organic matter. For 8 FTC cycles, every one of which is 24 h, in a black soil with 150 mg Zn per kg soil, increase in organic matter leads to a decrease in exchangeable form of Zn and Fe-Mn oxide form of Zn, and an increase in organic form of Zn and residual form of Zn. While, for no FTC, exchangeable form of Zn and Fe-Mn oxide form of Zn decrease gradually, and organic form of Zn increases gradually, residual form of Zn has no distinct change, with the increase of organic matter content. As organic matter content increases in the soil, FTC further improves decreases in bio-available form of Zn. Fitting organic matter and contents of different forms of Zn with or without FTC, Zn in all forms exhibits a quadratic polynomial function correlation with organic matter content with correlation coefficients of 0.664~0.995.
Keyword:  Heavy metal Zn, Fractional transformation, Freeze-thaw cycle (FTC), Organic matter, Black soil
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