中国地理科学(英文版) ›› 2008, Vol. 18 ›› Issue (3): 276-283.doi: 10.1007/s11769-008-0276-1

• 论文 • 上一篇    下一篇

Spatial Distribution and Changes of Heavy Metals of Agricultural Lands in Typical Pregrading Coast in Dongtai City, Jiangsu Province, China

LIAO Fuqiang1,2, ZHOU Shenglu1, ZHANG Hongfu1, WU Shaohua1, ZHAO Qiguo3   

  1. 1. School of Geography and Ocean Science, Nanjing University, Nanjing 210093, China;
    2. School of Geography and Environment, Jiangxi Normal University, Nanchang 330022, China;
    3. Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
  • 收稿日期:2008-01-18 修回日期:2008-05-25 出版日期:2008-09-20 发布日期:2011-12-14
  • 通讯作者: ZHOU Shenglu. E-mail: zhousl@nju.edu.cn E-mail:zhousl@nju.edu.cn
  • 基金资助:

    Under the auspices of State Key Development Program for Basic Research of China (No. 2002CB410810)

Spatial Distribution and Changes of Heavy Metals of Agricultural Lands in Typical Pregrading Coast in Dongtai City, Jiangsu Province, China

LIAO Fuqiang1,2, ZHOU Shenglu1, ZHANG Hongfu1, WU Shaohua1, ZHAO Qiguo3   

  1. 1. School of Geography and Ocean Science, Nanjing University, Nanjing 210093, China;
    2. School of Geography and Environment, Jiangxi Normal University, Nanchang 330022, China;
    3. Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
  • Received:2008-01-18 Revised:2008-05-25 Online:2008-09-20 Published:2011-12-14

摘要:

According to the historical changes of coastal lines, seven soil sampling districts, from land to sea, were arranged in Dongtai City, Jiangsu Province to sample soils from surface and profile. Concentrations of seven major heavy metals (HMs), granularity, pH, organic matters and C/N of the soil samples were analyzed. Results show that concentrations of heavy metals in agricultural land present a certain spatial variance, decreasing from land to sea. Pollution assessment indicates that the agricultural soils were not polluted by HMs, but the potential pollution of Cu and Hg needs to be alerted. Different HMs accumulate in the surface and sub-surface of the soil profiles, and concentrations of Hg and Pb decrease significantly with the increment of soil depth. Concentrations of HMs exhibit a significantly negative correlation to pH, but have no significant relation with organic matters in soil. Principle component analysis show that the concentrations of HMs relate to the land use history. Concentrations of Hg, Ni and Cr in soil are closely related with land use history, and concentrations of Pb, Cu and Cr are affected by land use history as well as other factors. However, there is no significant relation between concentration of As and land use history.

关键词: coastal zone, agriculture land, heavy metal, land use history

Abstract:

According to the historical changes of coastal lines, seven soil sampling districts, from land to sea, were arranged in Dongtai City, Jiangsu Province to sample soils from surface and profile. Concentrations of seven major heavy metals (HMs), granularity, pH, organic matters and C/N of the soil samples were analyzed. Results show that concentrations of heavy metals in agricultural land present a certain spatial variance, decreasing from land to sea. Pollution assessment indicates that the agricultural soils were not polluted by HMs, but the potential pollution of Cu and Hg needs to be alerted. Different HMs accumulate in the surface and sub-surface of the soil profiles, and concentrations of Hg and Pb decrease significantly with the increment of soil depth. Concentrations of HMs exhibit a significantly negative correlation to pH, but have no significant relation with organic matters in soil. Principle component analysis show that the concentrations of HMs relate to the land use history. Concentrations of Hg, Ni and Cr in soil are closely related with land use history, and concentrations of Pb, Cu and Cr are affected by land use history as well as other factors. However, there is no significant relation between concentration of As and land use history.

Key words: coastal zone, agriculture land, heavy metal, land use history