乌梁素海和岱海沉积物有机质降解与微生物量动态响应模拟试验研究  

Simulated Experiments on the Degradation of Organic Matter Dynamic Response for Microbial Biomass in Sediments from Lake Wuliangsuhai and Daihai,China

作　　者：毛海芳[1,2] 何江[1,3] 侯德坤[1] 吕昌伟[1,3] 王维[1,3] 樊明德[1,3] 

机构地区：[1]内蒙古大学环境与资源学院,呼和浩特010021 [2]赤峰市环境科学研究院,内蒙古赤峰024000 [3]内蒙古大学环境地质研究所,呼和浩特010021

出　　处：《农业环境科学学报》2013年第1期118-126,共9页Journal of Agro-Environment Science

基　　金：国家自然科学基金项目(40863003);内蒙古大学创新团队基金资助项目

摘　　要：基于乌梁素海和岱海的植物种类和微生物特性,开展了自然条件下乌梁素海芦苇、穗花狐尾藻和龙须眼子菜等分解过程中有机碳及其形态与微生物量的动态模拟实验,探讨了岱海不同湖区沉积物有机质分解过程中有机碳及其形态和微生物量的动态变化规律。结果表明,实验中各处理的上覆水中溶解态碳的动态变化趋势相似,但变幅不同。与岱海相比,乌梁素海上覆水中溶解无机碳(DIC)含量在30～90d期间内较高。乌梁素海加有机物料与空白处理的DIC含量差异不显著,岱海湖心与湖滨处理的DIC含量相当。动态模拟实验中,微生物量的动态变化可能反映了在利用有机碳源过程中的微生物群落演替;轻组有机碳明显减少,重组有机碳有所增加,揭示有机质矿化作用大于腐殖化作用,且腐殖化过程中腐殖质形成的速率序列为富啡酸(FA)>胡敏酸(HA);0～80d内,有机物料对腐殖质增加的幅度序列为芦苇>穗花狐尾藻>龙须眼子菜。Based on the characteristics of plant species and microbial,a dynamic simulated experiment on the relationship between biodegradation of organic matter and microbial biomass was carried out in the decomposition processes of Bulrush,Myriophyllum spicayum and Potamogeton pectinatus under natural conditions,and the varying regularities of the major organic carbon species and microbial biomass were also discussed in different areas of Daihai Lake and Wuliangsuhai Lake.The results showed that the varied tendencies of dissolved carbon with different treatments in overlying water were similar,but different in range.The difference of dissolved inorganic carbon content between in control and overlying water added organic matter from WLSH Lake was not remarkable,and the content of dissolved inorganic carbon in center and side of the Daihai Lake were roughly equal,the content of dissolved inorganic carbon in overlying water from WLSH Lake was higher than those in Daihai Lake over the period of 30 to 90 days.The dynamic variation of microbial biomass demonstrated that the evolution of microbial community occurred during the decay processes of organic matter.In the simulation experiments,the content of light fraction organic carbon decreased obviously and heavy fraction organic carbon increased slightly,which indicated that the mineralization of organic matter was markedly superior to the humification,and the humus generation rate in humification was：fulvic acid humic acid,and the increasing series of organic matter versus the content of humus during 0~80 days was BulrushMyriophyllum spicayumPotamogeton pectinatus.

关 键 词：有机质降解 微生物量 模拟试验 乌梁素海 岱海 

分 类 号：X524[环境科学与工程—环境工程]