外源氮输入对湿地碳汇功能的影响效应  

Effects of exogenous nitrogen input on wetland carbon sequestration function

作　　者：朱圆黎 肖国良 Zhu Yuanli;Xiao Guoliang(School of City and Regional Planning,Yancheng Teachers University,Yancheng 224007,China;Jiangsu Key Laboratory for Bioresources of Saline Soils,Yancheng 224007,China;Jiangsu Provincial KeyLaboratory for Resources Environment Evolution and Intelligent Regulation of Coastal Zone,Yancheng 224007,China)

机构地区：[1]盐城师范学院城市与规划学院,江苏盐城224007 [2]江苏省盐土生物资源研究重点实验室,江苏盐城224007 [3]江苏省海岸带资源环境演变与智能调控重点实验室,江苏盐城224007

出　　处：《江苏林业科技》2024年第6期39-44,共6页Journal of Jiangsu Forestry Science & Technology

基　　金：江苏高校哲学社会科学研究一般项目“碳中和目标下海岸带围垦湿地碳汇效应及减排增汇策略研究”(2024SJYB1484);江苏省盐土生物资源研究重点实验室开放课题“滩涂土壤微生物呼吸对模拟氮沉降的生态响应”(JKLBS2019007);盐城市重点研发计划(社会发展)项目“基于微生物调控的盐城滩涂湿地固碳增汇关键技术研究”(YCBE202242)。

摘　　要：湿地生态系统在全球碳循环中发挥着至关重要的作用,其对外源氮输入的响应及碳汇功能变化是当前研究的热点。尽管外源氮输入对湿地生态系统的影响已有研究,但侧重于特定条件下的案例分析,缺乏对整体效应的全面评估。该文系统分析了外源氮输入途径、形态、沉降量及其对湿地土壤、植物和水体等关键生态要素的作用,深入探讨了外源氮输入与湿地碳汇功能之间的相互作用。外源氮输入通过改变土壤理化特性、调节植物生长和水体生物化学过程,进而影响湿地碳氮循环和温室气体排放。氮素形态和沉降量是影响湿地碳汇功能的关键因素,不同氮形态和沉降量通过改变植物生长和土壤生物化学过程,影响湿地的碳储存和释放。适量的氮沉降可增强土壤碳循环,而过量氮沉降则可能导致土壤酸化和养分流失,降低土壤碳库稳定性。该研究为湿地生态系统碳循环的持续稳定发展提供了科学依据,对于制定合理的氮管理策略具有重要意义。Wetland ecosystems play a crucial role in the global carbon cycle,and their response to external nitrogen input and changes in carbon sequestration function are currently hot research topics.Although studies have explored the impact of exogenous nitrogen input on wetland ecosystems,they focus on the cases under specific conditions and lack a comprehensive assessment of the overall effects.This study systematically analyzed the pathways,forms,and deposition of exogenous nitrogen input,as well as its effects on key ecological elements such as wetland soil,plants,and water bodies.It delved into the interaction between exogenous nitrogen input and wetland carbon sequestration function.Exogenous nitrogen input affects wetland carbon and nitrogen cycling and greenhouse gas emissions by altering soil physicochemical properties,regulating plant growth,and water biochemical processes.Nitrogen forms and deposition are key factors affecting wetland carbon sequestration function.Different nitrogen forms and deposition affect wetland carbon storage and release by altering plant growth and soil biochemical processes.Moderate nitrogen deposition can enhance soil carbon cycling while excessive nitrogen deposition may lead to soil acidification and nutrient loss,reducing soil carbon pool stability.This study provides a scientific basis for the sustainable and stable development of carbon cycling in wetland ecosystems,which is of great significance for formulating reasonable nitrogen management strategies.

关 键 词：湿地生态系统 外源氮输入 氮沉降 碳汇功能 碳循环 

分 类 号：F062.2[经济管理—政治经济学] Q948[生物学—植物学] X142[环境科学与工程—环境科学] X171X37