不同程度重金属污染对水稻土团聚体组成的影响
作者:
作者单位:

南京农业大学农业资源与生态环境研究所,南京农业大学农业资源与生态环境研究所,南京农业大学农业资源与生态环境研究所,南京农业大学农业资源与生态环境研究所,南京农业大学农业资源与生态环境研究所,南京农业大学农业资源与生态环境研究所,南京农业大学农业资源与生态环境研究所,南京农业大学农业资源与生态环境研究所,南京农业大学农业资源与生态环境研究所

作者简介:

通讯作者:

中图分类号:

S158.3

基金项目:

国家自然科学基金项目(41471193)资助。


Effects of Different Heavy Metal Pollution Levels on Soil Aggregates Composition in A Paddy Soil
Author:
Affiliation:

Institute of Resources,Ecosystem and Environment for Agriculture,Nanjing Agricultural University,Institute of Resources,Ecosystem and Environment for Agriculture,Nanjing Agricultural University,Institute of Resources,Ecosystem and Environment for Agriculture,Nanjing Agricultural University,Institute of Resources,Ecosystem and Environment for Agriculture,Nanjing Agricultural University,Institute of Resources,Ecosystem and Environment for Agriculture,Nanjing Agricultural University,Institute of Resources,Ecosystem and Environment for Agriculture,Nanjing Agricultural University,Institute of Resources,Ecosystem and Environment for Agriculture,Nanjing Agricultural University,Institute of Resources,Ecosystem and Environment for Agriculture,Nanjing Agricultural University,Institute of Resources,Ecosystem and Environment for Agriculture,Nanjing Agricultural University

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    以太湖地区长期受重金属污染的稻麦轮作条件下的水稻土为研究对象,分别采取水稻收获期和小麦收获期不同重金属污染水平的土壤和临近非污染土壤(对照土壤),利用低能量超声分散分离技术将原状土进行团聚体分级,并结合土壤碳库分析,研究不同程度重金属污染对水稻土团聚体组成的影响。结果表明:随着重金属污染程度的增加,小麦收获期土壤2 ~ 0.2 mm与0.2 ~0.02 mm粒级的团聚体含量呈显著降低趋势,0.02 ~0.002 mm与<0.002 mm粒级团聚体含量显著增加,但这种趋势在水稻收获期表现不显著;重金属污染降低了水稻季团聚体平均重量直径(MWD),从而降低了土壤的团聚程度,但这在小麦季并未表现出显著的降低作用;而小麦季重金属污染对原土及团聚体中有机碳含量没有显著影响,水稻季重金属污染则显著增加了土壤有机碳的含量。这些结果表明不同重金属污染程度对土壤团聚体组成的影响在不同的作物收获期表现不同,这可能与土壤团聚体周转过程受农田水分管理等措施影响有关,尚需深入研究。

    Abstract:

    In order to explore the influences of different heavy metal pollution levels on soil aggregate composition of a paddy soil, soil samples near the Taihu Lake area in Jiangsu with a wheat-rice rotation under a long-term heavy metal contamination were collected, and bulk soils were separated into various size fractions of aggregates with low energy dispersion. The results showed that in wheat season the contents of 2–0.2 mm and 0.2–0.02 mm aggregates decreased significantly, whereas the contents of 0.02–0.002 mm and <0.002 mm aggregates increased significantly with the increasing of pollution degree of heavy metals, but it was not happened in rice season because of the different water regime management compared with wheat season. All the data showed that heavy metal pollution decreased the MWD (mean weight diameter) value of the aggregates in rice season, which implies that metal pollution could destroy soil aggregation. But there’s no the same trend in wheat season. The results showed that heavy metal pollution had no significant influences on the content of organic carbon in bulk soil and aggregates in wheat season, but metal pollution increased the SOC in rice season. The study showed that under heavy metal pollution, the composition of soil aggregates responses differently in various crop season which may relate with various field managements.

    参考文献
    相似文献
    引证文献
引用本文

张玉娇,陈敏瑶,张旭辉,贺 枫,刘晓雨,卞荣军,程 琨,李恋卿,潘根兴.不同程度重金属污染对水稻土团聚体组成的影响[J].土壤,2017,49(2):337-344. ZHANG Yujiao, CHEN Minyao, ZHANG Xuhui, HE Feng, LIU Xiaoyu, BIAN Rongjun, CHENG Kun, LI Lianqing, PAN Genxing. Effects of Different Heavy Metal Pollution Levels on Soil Aggregates Composition in A Paddy Soil[J]. Soils,2017,49(2):337-344

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2016-04-20
  • 最后修改日期:2016-08-01
  • 录用日期:2016-11-15
  • 在线发布日期: 2017-03-22
  • 出版日期: 2017-04-25