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地球科学进展  2011, Vol. 26 Issue (2): 235-244    DOI: 10.11867/j.issn.1001-8166.2011.02.0235
生态学研究     
干旱半干旱区CO2浓度升高对生态系统的影响及碳氮耦合研究进展
尹飞虎1,李晓兰1,董云社1,2*,谢宗铭1,高志建1,何帅1,刘长勇1
1. 新疆农垦科学院,新疆石河子832000;2. 中国科学院地理科学与资源研究所,北京100101
Effect of Elevated CO2 on Ecosystem and C-N Coupling  in Arid and Semi-arid Region
Yin Feihu1, Li Xiaolan1, Dong Yunshe1,2, Xie Zongming1, Gao Zhijian1, He Shuai1
1. Xinjiang Academy of Agricultural and Reclamation Science, Shihezi832000, China; 2. Institute of Geographic Science and Natural Resources Research, CAS, Beijing100101, China
 全文: PDF(992 KB)  
摘要:

大气CO2浓度升高已成为全球备受关注的环境问题。CO2排放量的增加加剧了地球表层的温室效应,也对生态系统的结构和功能产生了重要影响。生态系统对CO2浓度升高的响应是一个长期的过程。在干旱半干旱区,CO2浓度的升高对生态系统生产力、植物、土壤和微生物等都有影响,尤其改变了生态系统中的碳循环,并加剧了生态系统对氮的需求。碳循环是生态系统重要的能量流通渠道;氮是生态系统最重要的营养元素之一,也是生态系统固碳能力的限制因子。因此,加强碳氮耦合关系的探讨对研究全球气候及生态系统变化具有重要意义。对干旱半干旱区CO2浓度升高对生态系统的影响及碳氮耦合的研究进展进行了综述和讨论,为进一步研究干旱半干旱区碳、氮循环提供参考。

关键词: 干旱半干旱区CO2浓度生态系统碳氮耦合    
Abstract:

Atmospheric CO2 concentrations had increased from approximately 280 μmol/mol  in the late 19th-century to over 360 μmol/mol  today. Elevated CO2not only pricked up global greenhouse effect, but also changed the C balance of global ecosystems, which led to the changes of ecosystem structure and function. Alterations in microbial mineralization and nutrient cycling may control the longterm response of ecosystems to elevated CO2. Elevated CO2concentrations influenced carbon cycle, ecosystem productivity, plant, soil, microbe, and other environmental factors. The effects of elevated CO2 on growth were highly dependent on interactions with N cycling. Particularly important was the effect of elevated CO2 on N cycling and availability because shortages in N could eventually attenuate the increased plant biomass production seen in shortterm elevated CO2 studies. Changes in microbial biomass C and N, microbial activity and inorganic N could indicate the effects of elevated CO2on N dynamics. Increases in N-use efficiency tended to increase the C/N ratio of plant materials grown in elevated CO2. The purpose of this paper  is to summarize the changes of ecosystems and C-N coupling due to the increasing atmospheric CO2concentration in order to lucubrate to carbon cycle and nitrogen cycle in arid and semi-arid region.

Key words: Arid and semi-arid region    CO2 concentrations    Ecosystem    C-N coupling
收稿日期: 2010-04-07 出版日期: 2011-02-10
:  S153.621  
基金资助:

国家自然科学基金项目“CO2浓度升高对新疆干旱区棉花—土壤系统的影响机制及其与氮素的耦合作用”(编号:40973061);国家高技术研究发展计划项目“新疆干旱区现代节水农业技术研究与集成”(编号:2006AA100218);兵团科技攻关计划项目“碳素对棉花生长及产量影响机制的试验与示范”(编号:2006YD25)资助.

通讯作者: 董云社(1961-),男,陕西武功人,研究员,主要从事陆地表层生命元素环境生物地球化学循环研究.       E-mail: dongys@igsnrr.ac.cn
作者简介: 尹飞虎(1954-),男,湖南平江人,研究员,主要从事植物营养方面研究. E-mail:nkyyfh@sohu.com
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尹飞虎,李晓兰,董云社,谢宗铭,高志建,何帅,刘长勇. 干旱半干旱区CO2浓度升高对生态系统的影响及碳氮耦合研究进展[J]. 地球科学进展, 2011, 26(2): 235-244.

Yin Feihu, Li Xiaolan, Dong Yunshe, Xie Zongming, Gao Zhijian, He Shuai. Effect of Elevated CO2 on Ecosystem and C-N Coupling  in Arid and Semi-arid Region. Advances in Earth Science, 2011, 26(2): 235-244.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2011.02.0235        http://www.adearth.ac.cn/CN/Y2011/V26/I2/235

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