湖南会同杉木人工林生态系统CO2通量特征

doi:10.11707/j.1001-7488.20111102

林业科学 ›› 2011, Vol. 47 ›› Issue (11): 6-12.doi: 10.11707/j.1001-7488.20111102

湖南会同杉木人工林生态系统CO₂通量特征

赵仲辉^1,2, 张利平¹, 康文星^1,2, 田大伦^1,2, 项文化^1,2, 闫文德^1,2, 彭长辉^1,3

1. 中南林业科技大学生命科学与技术学院长沙 410004;2. 湖南会同杉木林生态系统国家野外科学观测研究站会同 418307;3. Institute of Environmental Science, University of Quebec at Montreal Montreal Quebec H3C3P8

收稿日期:2010-07-11 修回日期:2011-09-05 出版日期:2011-11-25 发布日期:2011-11-25

Characteristics of CO₂ Flux in a Chinese Fir Plantation Ecosystem in Huitong County, Hunan Province

Zhao Zhonghui^1,2, Zhang Liping¹, Kang Wenxing^1,2, Tian Dalun^1,2, Xiang Wenhua^1,2, Yan Wende^1,2, Peng Changhui^1,3

1. Faculty of Life Science and Technology, Central South University of Forestry and Technology Changsha 410004;2. Huitong National Research Station of Chinese Fir Plantation Ecosystem in Hunan Province Huitong 418307;3. Institute of Environmental Science, University of Quebec at Montreal Montreal Quebec H3C3P8

Received:2010-07-11 Revised:2011-09-05 Online:2011-11-25 Published:2011-11-25

摘要/Abstract

摘要：

利用开路式涡动相关系统与自动气象梯度观测系统2008年12个月的观测数据,研究会同13年生杉木人工林CO₂通量特征。结果表明: 13年生杉木人工林生态系统CO₂通量日变化存在明显的季节差异,晴天平均碳汇持续时间表现为夏>春>秋>冬,平均日较差表现为夏>秋>春>冬,最大碳汇出现时间由早到晚依次为夏、秋、春和冬; 1年中,月累积碳通量除1和2月为碳源外,其他各月均表现为碳汇,碳汇最大值出现在6月(-53.0 g C·m^-2); 13年生杉木林的年碳汇总量为-255.3 g C·m^-2。白天CO₂通量与光合有效辐射的关系可用Michaelis-Menten模型模拟(P<0.05),但模型参数随温度而异; 夜间CO₂通量与5 cm土壤温度呈指数关系(P<0.05)。

Abstract:

Characteristics of CO₂ flux were investigated by using the data collected from an open path eddy covariance system and an automatic weather gradient system in a 13-year-old Chinese fir plantation ecosystem in Huitong County, Hunan Province, in 2008. The results showed that there were pronounced diurnal and annual variations in CO₂ flux in the Chinese fir plantation. In clear days, mean duration of negative CO₂fluxes decreased from summer, spring, autumn to winter, and the biggest mean daily carbon dioxide flux range and the earliest time of the average minimum carbon dioxide appeared in summer, followed by autumn, spring and winter. The Chinese fir plantation ecosystem had a negative monthly CO₂ flux that acted as a carbon sink except for January and February. The minimum accumulated monthly net carbon ecosystem exchange (maximum carbon sink) was -53.0 g C·m^-2 occurred in June. The annual net carbon ecosystem exchange amounted to -255.3 g C·m^-2. The CO₂ flux was closely related to several meteorological factors including photosynthetic active radiation, air temperature and soil temperature. The Michaelis-Menten model could be used to express the relationship between CO₂ flux and photosynthetic active radiation in daytime, however the model parameters varied apparently with different temperatures (P<0.05). The CO₂ flux at night showed an exponential relationship with soil temperature at 5 cm depth(P<0.05).

Key words: Chinese fir plantation, eddy covariance, CO₂ flux, photosynthetic active radiation, air temperature, soil temperature

中图分类号:

S718.5

赵仲辉;张利平;康文星;田大伦;项文化;闫文德;彭长辉;. 湖南会同杉木人工林生态系统CO₂通量特征[J]. 林业科学, 2011, 47(11): 6-12.

Zhao Zhonghui;Zhang Liping;Kang Wenxing;Tian Dalun;Xiang Wenhua;Yan Wende;Peng Changhui;. Characteristics of CO₂ Flux in a Chinese Fir Plantation Ecosystem in Huitong County, Hunan Province[J]. Scientia Silvae Sinicae, 2011, 47(11): 6-12.

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湖南会同杉木人工林生态系统CO₂通量特征

Characteristics of CO₂ Flux in a Chinese Fir Plantation Ecosystem in Huitong County, Hunan Province

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