红壤丘陵区晚稻生长期间CO2的排放与固定规律

doi:CNKI:SUN:NCST.0.2007-01-001

生态与农村环境学报 ›› 2007, Vol. 23 ›› Issue (1): 7-11.doi: CNKI:SUN:NCST.0.2007-01-001

红壤丘陵区晚稻生长期间CO2的排放与固定规律

周卫军, 朱良枝, 郝金菊, 朱咏莉, 余乾文, 郭海彦

湖南农业大学资源环境学院

收稿日期:2006-07-25 出版日期:2007-01-25 发布日期:2011-05-09
作者简介:周卫军(1966－)，男，湖南临澧人，博士，教授，主要从事生态系统物质循环与转化及模拟方面的研究。
基金资助:
国家自然科学基金重点项目(40235057);;湖南农业大学人才引进项目(04YJ10)

CO₂ Emission and Fixation in Paddy Ecosystem During Late Rice Growing Season in Red Soil Hilly Region

ZHOU Wei-Jun, ZHU Liang-Zhi, HAO Jin-Ju, ZHU Yong-Li, YU Qian-Wen, GUO Hai-Yan

College of Resources and Environment,Hunan Agricultural University

Received:2006-07-25 Online:2007-01-25 Published:2011-05-09

摘要/Abstract

摘要： 采用静态箱法对红壤丘陵区稻田生态系统CO₂排放与固定进行定位观测。结果表明,晚稻生长期间稻田生态系统CO₂通量的日变化随天气条件(晴天、雨天、阴天)的变化而变化,CO₂日净固定量在晚稻生长期间波动性很大,最高达10.35 g.m^-2.d^-1,在晚稻成熟期表现为CO₂负固定,为-0.92 g.m^-2.d^-1;整个晚稻生育期,稻田生态系统CO₂累积排放量和土壤呼吸CO₂排放量分别为20.4和6.3 t.hm^-2,稻田生态系统CO₂累积排放量与水稻生物量之间存在极显著幂函数关系。在整个晚稻生育期,稻田生态系统从大气中吸收碳量为3.85 4.00 t.hm^-2。

关键词: 晚稻生态系统, 红壤丘陵区, CO₂通量, 碳固定

Abstract: Stationary observation of CO₂ emission and fixation in paddy ecosystem was carried out during the late rice growing season,using the closed static chamber technique in a red soil hilly region.It was found that CO₂ flux varied with the weather condition（sunny,rainny,cloudy） from day to day.The daily net CO₂ fixation fluctuated sharply during the season,peaking up to 10.35 g·m^-2·d^-1,and dropping down below zero,-0.92 g·m^-2·d^-1,at the maturing stage of the crop.The CO₂ accumulative emission from the paddy ecosystem reached 20.4 t·hm^-2 and from the soil through respiration 6.3 t·hm^-2.The former was in an extreme power function relationship with the crop biomass.During the entire growing season of late rice,the paddy ecosystem fixed 3.85 to 4.00 t·hm^-2 C from the atmosphere.

Key words: paddy ecosystem of late rice, red earth hilly region, CO₂ flux, CO₂ fixation

中图分类号:

周卫军, 朱良枝, 郝金菊, 朱咏莉, 余乾文, 郭海彦. 红壤丘陵区晚稻生长期间CO2的排放与固定规律[J]. 生态与农村环境学报, 2007, 23(1): 7-11.

ZHOU Wei-Jun, ZHU Liang-Zhi, HAO Jin-Ju, ZHU Yong-Li, YU Qian-Wen, GUO Hai-Yan. CO₂ Emission and Fixation in Paddy Ecosystem During Late Rice Growing Season in Red Soil Hilly Region[J]. Journal of Ecology and Rural Environment, 2007, 23(1): 7-11.

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红壤丘陵区晚稻生长期间CO2的排放与固定规律

CO₂ Emission and Fixation in Paddy Ecosystem During Late Rice Growing Season in Red Soil Hilly Region

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红壤丘陵区晚稻生长期间CO2的排放与固定规律

CO2 Emission and Fixation in Paddy Ecosystem During Late Rice Growing Season in Red Soil Hilly Region

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CO₂ Emission and Fixation in Paddy Ecosystem During Late Rice Growing Season in Red Soil Hilly Region