地理科学 ›› 2010, Vol. 30 ›› Issue (2): 254-260.doi: 10.13249/j.cnki.sgs.2010.02.254

• 论文 • 上一篇    下一篇

土壤有效态Cd、Cu、Pb的分布特征及影响因素研究

钟晓兰1, 周生路2, 李江涛3, 赵其国4   

  1. 1. 华南农业大学信息学院, 广东 广州 510642;
    2. 南京大学地理与海洋科学学院, 江苏 南京 210093;
    3. 广州大学地理科学学院, 广东 广州 510006;
    4. 中国科学院南京土壤研究所, 江苏 南京 210008
  • 收稿日期:2009-07-08 修回日期:2009-11-17 出版日期:2010-03-20 发布日期:2010-03-20
  • 通讯作者: 周生路,教授。E-mail:zhousl@nju.edu.cn E-mail:zhousl@nju.edu.cn
  • 作者简介:钟晓兰(1978- ),女,江西吉安人,博士,主要从事土壤资源和土壤环境质量方向的研究。E-mail:zxlnju@163.com
  • 基金资助:
    国家重点基础研究发展规划项目(2002CB410810)、广东省自然科学基金项目(8152500002000005)、华南农业大学新学科扶持基金(2009X027)资助。

Soil Available Cd, Cu, Pb Distribution Characteristic and Its Influencing Factors

ZHONG Xiao-lan1, ZHOU Sheng-lu2, LI Jiang-tao3, ZHAO Qi-guo4   

  1. 1. College of Informatics, South China Agricultural University, Guangzhou, Guangdong 516042;
    2. School of Geographic and Oceangraphic Sciences, Nanjing University, Nanjing, Jiangsu 210093;
    3. School of Geographical Sciences, Guangzhou University, Guangzhou, Guangdong 510006;
    4. Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu 210008
  • Received:2009-07-08 Revised:2009-11-17 Online:2010-03-20 Published:2010-03-20

摘要: 采集126个表层土壤样品分析了江苏省昆山市土壤有效态Cd、Cu、Pb的分布特征,并采用相关系数、通径系数和决策系数综合研究重金属有效态的含量影响因素。研究结果表明,昆山市土壤受有效态Cd、Cu和Pb的风险较大,生物有效性系数分别达63.75%,19.17%和13.51%。不同土地利用方式中交通用地的生物有效性显著高于其它各土地利用类型。随着剖面层次的下降,重金属有效态含量和生物有效性逐渐减小。土壤重金属总量对有效态均具有最大的正向影响作用,有机质对有效态含量均为较大的正向作用,FeOx含量通过吸附固持重金属离子对有效态含量也有较大负作用。

Abstract: A total of 126 soil samples were collected to analyze soil available Cd, Cu, Pb distribution characteristic in Kunshan City of Jiangsu Province, and its influencing factors were studied by correlation coefficient, path coefficient and decision parameters. The results showed that Cd, Cu and Pb bioavailability reached up to 63.75%, 19.17% and 13.51%, respectively. Significant differences were observed in Cd, Cu, Pb bioavailability between different soil land use types, and available Cd, Cu, Pb were the highest in the traffic land. It was also found that the bioavailability and contents of available Cd, Cu, Pb declined with the depth in soil profile. The availability concentration of Cd, Cu, Pb were influenced by the total concentration, soil pH, content of organic matter, clay, silt, sand, CEC, FeOx and MnOx, and there were the greatest positive effect for the total concentration to the availability concentration, and also organic matter had greater positive effect, while FeOx had negative effect by adsorbing ions of heavy metals.

中图分类号: 

  • X53