两种湿地植物枯落物还田分解速率对典型气候环境因子变化的响应  

Response of Litter Decomposition Rate of Two Wetland Plants to Typical Environmental Factors of Climate Change

作　　者：张宁[1] 张艳楠[2] 

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海市200092 [2]同济大学环境科学与工程学院,上海市200092

出　　处：《城市道桥与防洪》2014年第7期349-353,375,共6页Urban Roads Bridges & Flood Control

基　　金：国家水体污染控制与治理科技重大专项(2013ZX07315-003);国家自然科学基金(21177093和21307093);863项目(2012AA050101);博士点基金(20130072110025)

摘　　要：该文介绍了采用人工气候室模拟了几种典型气候/环境因子变化特征(温度和CO2浓度增加,以及海水富营养化等),并从还田枯落物的质量变化,以及碳/氮等组分的变化等角度出发分析这些气候环境变化对两种湿地植物枯落物还田分解过程的影响。结果表明:CO2浓度增加(温度升高)和海水富营养化单独作用时均不同程度的促进了湿地植物枯落物的分解,加快了枯落物中C元素的流失,但是CO2浓度增加(温度升高)和海水富营养化共同作用时的复合作用效应小于单独作用;而互花米草枯落物中的碳后期损失速率虽有所降低,但其N含量有所升高,又有可能促进其后期的分解。这可能会影响其成为九段沙湿地高碳汇植物的潜力。The article introduces the use of artificial climate chamber to simulate several typical climate / environmental factor change features(temperature and CO2 concentration increase as well as seawater eutrophication), and analyzes the influence of these climate environmental changes on the litter decomposition process of two wetland plants from the angles of the quality change of litter returning and the changes in carbon / nitrogen fractions. The result shows that the single factor of CO2 concentration increase(temperature rising) or seawater eutrophication will promote the litter decomposition of wetland plant in varying degrees and speed up the loss of Element C in litter. However, the composite effect of CO2 concentration increase(temperature rising) together with seawater eutrophication is smaller than the single factor. The carbon later loss rate in the spartina alterniflora litter is decreased, but its content N is accumulated and possibly promotes its later decomposition. This would influence its potentiality to become the high carbon sequestration plant of Jiuduansha Wetland.

关 键 词：气候环境变化 秸秆还田 碳循环 人工气候室 

分 类 号：X820.3[环境科学与工程—环境工程]