东北地区泥炭沼泽枯落物分解过程及影响因子研究  

Study on the decomposition process of peatland litter and the factors in Northeast China

作　　者：王悦露 张诗雨 李佳南 廖桂项 王平 盛连喜 WANG Yue-lu;ZHANG Shi-yu;LI Jia-nan;LIAO Gui-xiang;WANG Ping;SHENG Lian-xi(State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration,School of Environment,Northeast Normal University,Changchun 130117,China)

机构地区：[1]东北师范大学环境学院,国家环境保护湿地生态与植被恢复重点实验室,吉林长春130117

出　　处：《环境生态学》2022年第10期1-8,共8页Environmental Ecology

基　　金：国家自然科学基金委面上项目(30970542),吉林省科技厅重点研发项目(20200402012NC)资助。

摘　　要：以东北地区泥炭草本沼泽为研究对象,测量5个不同群落枯落物连续3年的分解失重率、分解释放的碳量以及枯落物初始特征和水环境因子的影响作用。结果表明,无论是枯落物的分解时间还是群落类型,都显著改变了枯落物分解的最终失重率和碳元素释放量。分解3年的碳释放总量主要受水环境因子的影响,其次是枯落物初始特征的影响。枯落物分解释放的碳量在分解初期随枯落物氮磷含量增加、碳氮比下降而增加,在分解后期随水位下降和水体总磷含量升高而增加。该研究为揭示泥炭沼泽枯落物分解过程中的碳释放变化规律及关键影响因子,碳元素在泥炭沼泽生态系统中的循环过程提供了数据参考,也为制订全球变化背景下泥炭沼泽生态系统的恢复与保护、重建与管理等工作实践提供了科学的理论依据。In this study,the decomposition process of litter in five different communities for three consecutive years,the amount of carbon released by decomposition,and the effects of litter quality and water environment factors were studied comprehensively in a herbaceous peatland in Northeast China.The results showed that both community type and decomposition time significantly influenced the cumulative weight loss rate of litter and carbon release from decomposition.The total carbon release in three years of decomposition was influenced by both litter traits and environmental factors.The amount of carbon released from decomposing litter increased with increasing nitrogen and phosphorus content of litter and decreasing C/N ratio at the early stage of decomposition and increased with decreasing water level and increasing total phosphorus content of water at the late stage of decomposition.The results of the study provide basic data for the investigation of the carbon dynamics of the decomposition of herbaceous communities and the key influencing factors in peatland,and theoretical basis for scientific and reasonable managements of peatland restoration and reconstruction.

关 键 词：苔草群落 枯落物质量 水位 碳释放 枯落物失重率 

分 类 号：X171.1[环境科学与工程—环境科学] Q948[生物学—植物学]