【摘要】 用凝胶色谱法测定了 1 6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更多还原

【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.更多还原