生态与农村环境学报 ›› 2006, Vol. 22 ›› Issue (4): 80-82.doi:

• 研究简报 • 上一篇    下一篇

三江平原不同土地利用方式下土壤硫含量变化特征

李新华, 刘景双, 孙志高   

  1. 中国科学院东北地理与农业生态研究所
  • 收稿日期:2006-06-02 出版日期:2006-10-25 发布日期:2011-07-13
  • 作者简介:李新华(1979-),女,山东曹县人,博士生,主要从事环境生态与生物地球化学研究。
  • 基金资助:

    国家自然科学基金项目(90211003);;中国科学院知识创新工程重要方向项目(KZCX3-SW-332)

Changes in Soil Sulfur Under Different Land Use in Sanjiang Plain

 LI  Xin-Hua, LIU  Jing-Shuang, SUN  Zhi-Gao   

  1. Northeast Institute of Geography and Agricultural Ecology,Chinese Academy of Sciences
  • Received:2006-06-02 Online:2006-10-25 Published:2011-07-13

摘要: 通过分析三江平原不同土地利用方式下土壤总硫、有效硫含量的变化,探明土壤硫含量演变特征。结果表明,小叶章湿地土壤总硫和有效硫含量高于开垦后的农田土壤,开垦导致土壤硫含量下降,且随着耕种年限的增加,土壤总硫和有效硫含量呈逐年下降趋势。弃耕7 a后土壤总硫和有效硫含量有所增加,但增加量相对较小,表明土壤硫库耗竭易、恢复难。土壤硫与有机质含量之间呈显著正相关关系,提示湿地开垦后土壤有机质含量降低可能是引起土壤硫肥力下降的主要因素,提高土壤有机质含量将有利于维持和提高农田土壤硫肥力。

关键词: 三江平原, 土地利用, 总硫, 有效硫

Abstract: Changes in total sulfur and available sulfur in soils under different land use in the Sanjiang Plain were analyzed to explore characters of the evolution of sulfur content in the soils.Results show that Calamagrostis angustifolia wetland is higher than cropland in content of total sulfur and available sulfur,which indicates cultivation depletes soil S,and soil total sulfur and available sulfur show a decreasing trend with each passing year.After desertion under "Grain for Green" Project for 7 years the contents of total sulfur and available sulfur in the soil increased,but the increase is very limited,which indicates that the soil S pool,once depleted,is hard to restore.Soil sulfur is found to be positively related to soil organic matter,suggesting that decreased soil organic matter due to cultivation might be the main cause of the decrease in S fertility of the soil.So that,increasing soil organic matter is propitious to the maintenance and increase of soil S(fertility).

Key words: Sanjiang Plain, land use, total sulfur, available sulfur

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