地理研究 ›› 2001, Vol. 20 ›› Issue (1): 76-82.doi: 10.11821/yj2001010011

• 论文 • 上一篇    下一篇

土壤水溶性有机物与富里酸分子量分布的空间结构特征

张甲, 陶澍, 曹军   

  1. 北京大学城市与环境学系, 北京 100871
  • 收稿日期:2000-03-30 修回日期:2000-11-29 出版日期:2001-02-15 发布日期:2001-02-15
  • 作者简介:张甲 (1966-),男,甘肃永登人,博士。现从事环境地球化学和海陆相互作用研究,发 表论文10余篇。
  • 基金资助:

    国家杰出青年基金项目(49525102)

Spatial distribution of molecular size of water soluble organic matter and fulvic acid in soils from eastern China

ZHANG Jia shen, TAO Shu, CAO Jun   

  1. Department of Urban and Environmental Sciences, LESP-MOE, Peking University, Beijing 100871, China
  • Received:2000-03-30 Revised:2000-11-29 Online:2001-02-15 Published:2001-02-15

摘要:

用凝胶色谱法测定了16种土类的35个表土样品中水溶性有机物和富里酸的分子量分布。分析了水溶性有机物与富里酸分子量分布的地域分异规律与空间结构特征。结果表明研究区土壤水溶性有机物与富里酸平均分子量大小具有自东北向西南递降的一般趋势,分布的离散性则表现出与此相反的的规律。水溶性有机物分子量沿趋势面倾斜方向的变化幅度较富里酸大,两者在空间的自相关范围基本一致。水热条件是影响水溶性有机物分子量空间分布的主要因素

关键词: 土壤, 水溶性有机物, 富里酸, 分子量, 空间结构特征

Abstract:

Molecular size distribution of water soluble organic matter (WSOM) and fulvic acid (FA) of soils sampled from eastern China were determined by gel chromatography. The spatial variation in molecular size distribution of WSOM and FA was analyzed. There is a decreasing trend in molecular size distribution of WSOM and FA, average molecular size decreasing from north east to south west in the study area. Precipitation and temperature were thought to be basic factors for this.

Key words: soil, water soluble organic matter, fulvic acid, molecular size, spatial distribution

PACS: 

  • X144