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.
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.
作者
黎烨
周聪聪
戴零星
金融哲
李帅东
姜泉良
吴亚林
杨浩
余艳红
黄昌春
黄涛
LI Ye ZHOU Congcong DAI Lingxing JIN Rongzhe LI Shuaidong JIANG Quanliang WU Yalin YANG Hao YU Yanhong HUANG Changchun HUANG Tao(Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023 Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Nanjing 210023 School of Geography Science, Nanjing Normal University, Nanjing 210023 Yunnan Institute of Environmental Science（ Kunming China International Research Center for Plateau Lake）, Kunming 650032)
出处
《环境科学学报》
CAS
CSCD
北大核心
2017年第3期1098-1106,共9页
Acta Scientiae Circumstantiae
基金
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~~
