开放式空气CO2浓度增高影响稻田大气CO2净交换的静态暗箱法观测研究

应用生态学报 ›› 2002, Vol. ›› Issue (10): 1240-1244.

开放式空气CO₂浓度增高影响稻田大气CO₂净交换的静态暗箱法观测研究

郑循华¹, 徐仲均¹, 王跃思¹, 韩圣慧¹, 黄耀¹, 蔡祖聪², 朱建国²

1. 中国科学院大气物理研究所, 北京, 100029;
2. 中国科学院南京土壤研究所, 南京, 210008

收稿日期:2002-06-12 修回日期:2002-08-18 出版日期:2002-10-15
通讯作者: 郑循华,女,1964年生,理学博士,研究员,主要从事微量气体地气交换及大气化学研究,发表论文30余篇.E-mail:zxh@mail.iap.ac.cn
基金资助:
国家自然科学基金(40175030);中国科学院知识创新重要方向资助项目(KZCX2408和KZCX1SW01).

ZHENG Xunhua¹, XU Zhongjun¹, WANG Yuesi¹, HAN Shenghui¹, HUANG Yao¹, CAI Zucong², ZHU Jianguo ²

1. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;
2. Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008

Received:2002-06-12 Revised:2002-08-18 Online:2002-10-15

摘要/Abstract

摘要： 首先介绍静态暗箱法气相色谱法观测确定陆地生态系统地气CO₂净交换通量的基本原理和方法,然后讨论在开放式空气CO₂增加(FACE)试验中应用该原理和方法观测研究大气CO₂浓度升高对稻田生态系统大气CO₂净交换通量的影响.因缺乏必要参数的实际观测值,本文只能根据暗箱观测值计算CO₂净交换通量的最小取值NEE_min.NEE_min计算结果表明,在插秧1个月之后的水稻生长期内,大气CO₂浓度升高200±40μmol·mol^-1使稻田生态系统对大气CO₂的净吸收约为对照的3倍.为根据暗箱观测准确确定NEE,还必须在FACE和对照条件下观测水稻植株的暗维持呼吸系数、地上生物量及根冠比动态.

Abstract: We firstly introduced the method for determining the net ecosystem exchange fluxes of CO₂ (NEE) between croplands and atmosphere, based on field measurements using static opaquechamber/gas chromatography methods was introduced,and the application of this method in the FACE (free-air CO₂ enrichment) study to examine the effects of elevated CO₂ on the NEEover a typical paddy ecosystem was carried out.because of lacking in observation data for some necessary parameters, e.g., dark maintenance respiration coefficient, only the minimum value of NEE (NEE_min)was calculated based on opaque-chamber measurements.The NEE_min data indicate that CO₂ elevated by 200±40μmol·mol^-1significantly increased the ecosystem uptake of atmospheric CO₂ by a factor ca.3.To accurately determine the NEEbased on opaquechamber measurements, dark maintenance respiration coefficient, above-ground biomass and root:shoot,i.e.R:S,ratio of root to shoot should be observed over the whole growing season.

中图分类号:

X171

郑循华, 徐仲均, 王跃思, 韩圣慧, 黄耀, 蔡祖聪, 朱建国. 开放式空气CO₂浓度增高影响稻田大气CO₂净交换的静态暗箱法观测研究[J]. 应用生态学报, 2002, (10): 1240-1244.

ZHENG Xunhua, XU Zhongjun, WANG Yuesi, HAN Shenghui, HUANG Yao, CAI Zucong, ZHU Jianguo . [J]. Chinese Journal of Applied Ecology, 2002, (10): 1240-1244.

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开放式空气CO₂浓度增高影响稻田大气CO₂净交换的静态暗箱法观测研究

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