• 关键词：活性腐殖质  胡敏酸  富里酸  紫外-可见吸收光谱  三维荧光光谱  滇池流域

• 基金项目：国家自然科学基金青年基金项目（No.41503075）；国家自然科学基金面上基金项目（No.41571324）；中国博士后基金面试资助项目（No.2015M581826）；云南省环境科学研究院（中国昆明高原湖泊国际研究中心）开放基金项目

• 黎烨
• 南京师范大学地理科学学院, 南京 210023

• 周聪聪
• 南京师范大学地理科学学院, 南京 210023

• 戴零星
• 南京师范大学地理科学学院, 南京 210023

• 金融哲
• 南京师范大学地理科学学院, 南京 210023

• 李帅东
• 1. 江苏省地理信息资源开发与利用协同创新中心, 南京 210023;2. 江苏省物质循环与污染控制重点实验室, 南京 210023;3. 南京师范大学地理科学学院, 南京 210023

• 姜泉良
• 南京师范大学地理科学学院, 南京 210023

• 吴亚林
• 南京师范大学地理科学学院, 南京 210023

• 杨浩
• 南京师范大学地理科学学院, 南京 210023

• 余艳红
• 云南省环境科学研究院(中国昆明高原湖泊国际研究中心), 昆明 650032

• 黄昌春
• 1. 江苏省地理信息资源开发与利用协同创新中心, 南京 210023;2. 江苏省物质循环与污染控制重点实验室, 南京 210023;3. 南京师范大学地理科学学院, 南京 210023

• 黄涛
• 1. 江苏省地理信息资源开发与利用协同创新中心, 南京 210023;2. 江苏省物质循环与污染控制重点实验室, 南京 210023;3. 南京师范大学地理科学学院, 南京 210023

• 摘要：利用紫外-可见光谱和三维荧光光谱技术，结合土壤腐殖质及腐殖质组分（胡敏酸、富里酸）中的有机碳含量，研究了滇池流域土壤活性腐殖质及其组分胡敏酸和富里酸的光谱特征.结果表明，滇池流域土壤活性腐殖质中富里酸含量高于胡敏酸，流域范围内土壤活性腐殖质及其组分含量分布不均匀，活性腐殖质、胡敏酸和富里酸含量的变异系数分别达37.7%、36.4%、40.9%.土壤活性腐殖质及其组分胡敏酸和富里酸的碳含量均表现为菜地 < 荒地 < 草地 < 湿地.光谱特征结果表明，滇池流域土壤活性腐殖质主要由自生源物质和经一定程度降解后的外源物质共同组成.此外，自生源性与光化学及生物活性具有正相关关系.因此，具有弱自生源性的滇池流域土壤活性腐殖质所具有的光化学和生物活性较弱.

• Abstract：Soil samples at Dianchi Lake basin were collected in July 2014 and measured by ultraviolet-visible absorption spectroscopy and three-dimensional fluorescence spectroscopy (3DEEMs) in combination with carbon concentration. Based on these measured data, the spectrum characteristics of soil active humus as well as its compositions of humic acid and fulvic acid were studied. The results indicated that soil active humus in Dianchi Lake basin contained much more fulvic acid than humic acid. The distribution of soil active humus and its compositions were heterogeneous in this region, with the variation coefficient of soil active humus, humic acid and fulvic acid of 37.7%, 36.7% and 40.9%, respectively. The carbon concentration of active soil humus, humic acid and fulvic acid were in the same order of vegetable field < wasteland < grassland < wet land. The formation of active soil humus consisted of endogenous substances and partly degraded exogenic substances. A positive correlation between photochemical activity and endogenous characteristic was found in our study. Therefore, the photochemical and bio-availability activity in soil active humus was weak due to its weak endogenous characteristic in Dianchi Lake basin.

• Key words：active humus  humic acid  fulvic acid  UV-VIS  3DEEMs  Dianchi Lake basin

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