亚热带典型森林生态系统土壤呼吸

刘源月; 江洪; 邱忠平; 原焕英; 李雅红

亚热带典型森林生态系统土壤呼吸

刘源月¹,
江洪^1,2, ,,
邱忠平³,
原焕英²,
李雅红⁴

基金项目:

国家自然科学基金资助项目(40671132)

科学技术部973项目(2005CB422207和2005CB422208)

科学技术部国家合作项目(20073819)

浙江省重大科技专项项目(2008C13G2100010)

详细信息

作者简介:
刘源月(1975- ),女,博士,研究方向为土壤生态及土壤污染修复,电话:13770703537,E-mail:liuyy2823448@163.com

通讯作者:
江洪(1955- ),男,教授,博士, E-mail: hongjiang.china@gmail.com

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出版历程
- 收稿日期: 2009-01-05

Soil Respiration of Three Typical Subtropical Forest Ecosystems in Tianmu Mountain of China

摘要

摘要: 为了解中国亚热带森林土壤碳释放CO2与区域气候环境的关系,在亚热带典型区域浙江西天目山选择森林生态系统类型杉木林、毛竹林和常绿阔叶林,采用LI-8100开路式土壤碳通量测量系统测定土壤呼吸通量.结果表明:各林分的土壤呼吸日变化趋势多呈单峰型;3个森林生态系统中,土壤CO2年均释放速率大小依次是毛竹林4.28μmol/(m2·s)、杉木林2.35μmol/(m2·s)、常绿阔叶林2.23μmol/(m2·s).土壤呼吸随着不同季节土壤温度的变化相异,8月最高,11月受低温限制,呼吸作用微弱.土壤水分与土壤呼吸呈负相关,且常与土壤温度一起共同作用于土壤呼吸,这种非线性交互作用导致环境因子影响土壤呼吸的过程.
- 土壤呼吸 /
- 碳循环 /
- 亚热带森林 /
- 天目山
Abstract: The soil respiration(SR) of three typical forest ecosystems,which were Chinese fir,broadleaf evergreen and Phyllostachys pubescens,were measured by the infrared system(LI-8100) in situ in West Tianmu Mountain of Chinese subtropical area,to study the relationship between the fluxes of CO2 released from this soil carbon pool and the change of the regional climatic environment.The results indicated that the diurnal soil respiration in the three stands almost varied in a single-peaked pattern.Among the three stands,the annual average CO2 efflux rate of Phyllostachys pubscens(3.82 μmo l/(m2·s)) was the greatest,that of broadleaf evergreen(2.23 μmo l/(m2·s))was the lowest,and that of Chinese fir(2.35 μmo l/(m2·s))was in between them.Generally,soil respiration rate increased with soil temperature.In summer(August),the CO2 effluxes of the three stands rose to the maximum,but dropped greatly in winter(November).Soil moisture was in a negative linear correlation with SR,and together with soil temperature,had mutual effects on SR.In conclusion,the environmental factors interacted with each other and influenced the process of SR.
- soil respiration /
- carbon cycle /
- subtropical forests /
- Tianmu Mountain

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参考文献(1)

SCHLESINGER W H,ANDREWS J A.Soil respiration and the global carbon cycle[J].Biogeochemistry,2000,48(1):7-20.[2] 方精云,位梦华.北极陆地生态系统的碳循环与全球温暖化[J].环境科学学报,1998,18 (2):113-121.FANG Jingyun,WEI Menghua.The carbon cycle in terrestrial ecosystem of arctic zone and global warming[J].Journal of Environmental Science,1998,18 (2):113-121.[3] 文玉明.地球系统科学及其在全球环境研究中的应用[J].西南交通大学学报,1998,33(5):550-554.WEN Yuming.Geosystem science and its applications in the researches of global environmental changes[J].Journal of Southwest Jtaotong University,1998,33(5):550-554.[4] 黄承才,葛滢,常杰,等.中亚热带东部3种主要木本群落土壤呼吸的研究[J].生态学报,1999,19(3):324-328.HUANG Chengcai,GE Ying,CHANG Jie,et al.Studies on the soil respiration of three woody plant communities in the east mid-subtropical zone,China[J].ACTA Ecologica Sinica,1999,19(3):324-328.[5] 肖复明,范少辉,汪思龙,等.毛竹(Phyllostachys pubescens)、杉木(Cunninghamia lanceolata)人工林生态系统碳贮量及其分配特征[J].生态学报,2007,27(7):2794-2801.XIAO Fuming,FAN Shaohui,WANG Silong,et al.A Carbon storage and spatial distribution in Phyllostachy pubescens and Cunninghamia lanceolata plantation ecosystem[J].ACTA Ecologica Sinica 2007,27(7):2794-2801.[6] HUDGENS E,YAVITT J B.Land-use effects on soil methane and carbon dioxide fluxes in forests near Ithaca,New York[J].Ecoscience,1997,4(2):214-222.[7] EUGENIE S,CHEN E,CHEN J Q,et al.Soil respiration at soil respiration at dominant patch types within a managed northern wisconsin landscape[J].Ecosystems,2003,6(6):595-607.[8] HAN G X,ZHOU G S,XU Z Z,et al.Soil temperature and biotic factors drive the seasonal variation of soil respiration in a maize (Zea mays L.) agricultural ecosystem[J].Plant and Soil,2007,291(1-2):15-26.[9] HANSON P J,EDWARDS N T,GARTEN C T,et al.Separating root and soil microbial contributions to soil respiration:a review of methods and observations[J].Biogeochemistry,2000,48(1):115-146.[10] TANG J W,BALDOCCHI D D,XU L K.Tree photosynthesis modulates soil respiration on a diurnal time scale[J].Global Change Biology,2005,11(8):1298-1304.[11] 陈全胜,李凌浩,韩兴国,等.水分对土壤呼吸的影响及机理[J].生态学报,2003,23(5):97-103.CHEN Quansheng,LI Linghao,HAN Xingguo,et al.Effects of water content on soil respiration and the mechanisms[J].ACTA Ecologica Sinica,2003,23(5):97-103.

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文章访问数: 1199
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