首页 | 本学科首页   官方微博 | 高级检索  
   检索      

黄土塬区麦田CO2通量季节变化
引用本文:李双江,刘文兆,高桥厚裕,桧山哲哉,福岛义宏,李志,刘志红,张红星.黄土塬区麦田CO2通量季节变化[J].生态学报,2007,27(5):1987-1992.
作者姓名:李双江  刘文兆  高桥厚裕  桧山哲哉  福岛义宏  李志  刘志红  张红星
作者单位:1.中国科学院水利部水土保持研究所,西北农林科技大学,陕西杨凌712100;
2.中国科学院研究生院,北京100039; 
3.日本综合地球环境学研究所,日本京都市;
4.日本名古屋大学地球水循环研究中心; 
5.中国科学院生态环境研究中心,北京100085
摘    要:利用涡度相关法对黄土塬区小麦地CO2通量季节变化进行了研究。结果表明:(1)小麦CO2通量日变化与生育期、光合有效辐射、土壤温度密切相关。(2)小麦各生育期CO2的平均日收支由大到小依次为拔节孕穗期>返青期>起身期>抽穗期>成熟期>灌浆期>出苗分蘖期>越冬期。(3)白昼CO2通量与光合有效辐射在出苗分蘖期、起身期、成熟期几乎不相关,在灌浆期低度相关,在其他生育期内都达到了显著相关。CO2通量与夜间2cm土壤温度在越冬、起身、拔节孕穗期显著相关,其他5个生育期内为低度相关。(4)小麦收割后表现为碳源,各天具体状况与前一天是否降雨、当天的天气状况有关。

关 键 词:

CO2通量  涡度相关法  黄土塬区  日变化  季变化  CO2收支

收稿时间:2006/2/15 0:00:00
修稿时间:2007/4/20 0:00:00

The seasonal variation of CO2 flux in a wheat field of the Loess Plateau
LI Shuangjiang,LIU Wenzhao,Atsuhiro Takahashi,Tetsuya Hiyam,Yoshihiro Fukushim,LI Zhi,LIU Zhihong and ZHANG Hongxing.The seasonal variation of CO2 flux in a wheat field of the Loess Plateau[J].Acta Ecologica Sinica,2007,27(5):1987-1992.
Authors:LI Shuangjiang  LIU Wenzhao  Atsuhiro Takahashi  Tetsuya Hiyam  Yoshihiro Fukushim  LI Zhi  LIU Zhihong and ZHANG Hongxing
Institution:1 Institute of Soil and Water Conservation, CAS& MWR, Northwest Sci-Tech University of Agriculture and Forestry,Yangling Shaanxi 712100, China
2 Graduate College of Chinese Academy of Sciences, Beijing 100039, China
3 Research Institute for Humanity and Nature (RIHN), Japan
4 Hydrospheric Atmospheric Research Center (HyARC),Nagoya University, Japan
5 Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing100085, China
Abstract:The seasonal variation of CO2 flux in a winter wheat field of the Loess Plateau was studied using an eddy covariance method. The following results were obtained. (1) Daily CO2 flux was closely related to growing stages, photosynthetically active radiation , and soil temperature. (2) The average daily CO2 flux at different growing stages followed the order of: jointing and booting >reviving >erecting >heading >ripening >grain-filling > seedling and tillering >wintering period. (3) There was little correlation between daytime CO2 flux and photosynthetically active radiation at the seedling-tillering, heading, and maturing stages; but there was weak correlation during grain filling, and strong correlation in the other stages. There was significant correlation between CO2 flux and nighttime soil temperatures at the 2-cm depth at the wintering, heading and jointing and booting stage, and low correlation at the other stages. (4) The wheat field became carbon source after harvest. The carbon budget of a given day was affected by the weather of the day as well as the rainfall condition in the previous day.
Keywords:CO2 flux  eddy covariance method  Loess Plateau  daily variation  variation during each growing stage  CO2 budget
点击此处可从《生态学报》浏览原始摘要信息
点击此处可从《生态学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号