摘要
水库消落带处于水域生态系统与陆地生态系统的交错区域。受水库水位周期性涨落影响,消落带土壤和植物与水库水体间频繁发生碳氮物质交换转化。河流-水库碳埋藏及其温室气体排放是当前全球碳循环研究的热点问题,但当前消落带碳氮输移循环的研究仅关注植物、土壤或水体单个对象,未将消落带作为整体考虑其对河流-水库碳氮输移转化的贡献。本文从消落带物质向河流输移和转化两个方面综合评述了消落带土壤碳氮动态、植被碳氮输入、土壤侵蚀、消落带碳氮循环及温室气体排放,提出亟待开展消落带碳氮输入源追溯、土壤侵蚀和温室气体通量长期监测、基于同位素等技术明确消落带在水库碳氮输移转化中的贡献等方面的研究,以进一步系统明确碳氮元素在消落带和水体间的输移、水土界面的多途径生物地球化学循环转化过程,评估水库消落带在河流上、下游及河口碳氮输送转化中的作用。
Water-level fluctuation zone(WLFZ)of reservoir is located in the interlaced area between aquatic and terrestrial ecosystem.Under the influence of periodic fluctuation of reservoir water level,carbon(C)and nitrogen(N)exchanges and transformation frequently occur between soil and plant of WLFZ and water body of reservoir.C burial and greenhouse gas emission of river-reservoir are hot issues in the global C cycle,however,current studies on WLFZ C and N cycles were only focused on single object such as plant,soil or water body,and did not take WLFZ as a whole in considering its contribution to river-reservoir C and N transport and transformation.This paper reviewed study progresses in the changes of soil C and N contents,C and N inputs by vegetation,soil erosion,C and N cycles and greenhouse gas emission from two aspects of transport and transformation of nutrients in the WLFZ.In order to further systematically clarify the multi-pathway biogeochemical cycling and transformation processes of C and N between WLFZ and water bodies and in soil and water interfaces and evaluate the role of WLFZ in C and N transport and transformation in upstream,downstream and estuary of river,it is suggested that to urgently carry out researches on tracing C and N input sources in WLFZ,long-term monitoring of soil erosion and greenhouse gas flux in WLFZ,and WLFZ contribution to C and N transport and transformation of reservoir based on isotopes,etc..
作者
李晓晴
王伟
操瑜
孙君瑶
李伟
LI Xiaoqing;WANG Wei;CAO Yu;SUN Junyao;LI Wei(College of Science,Tibet University,Lhasa 850000,China;Research Center for Ecology and Environment of Qinghai-Tibetan Plateau,Tibet University,Lhasa 850000,China;CAS Key Laboratory of Aquatic Botany and Watershed Ecology,Wuhan Botanical Garden,Chinese Academy of Sciences,Wuhan 430074,China;State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China)
出处
《土壤》
CAS
CSCD
北大核心
2021年第5期881-889,共9页
Soils
基金
国家重点研发计划项目(2016YFA0601001)
国家自然科学基金项目(31601824)
土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所)开放基金项目(Y20160018)资助。
关键词
消落带
碳氮动态
土壤侵蚀
温室气体排放
Water-level fluctuation zone
Carbon and nitrogen dynamic
Soil erosion
Greenhouse gas emission
