55年树龄东方柏人工林土壤CO2产量的垂直和季节变化

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2016-12-09 DOI:10.5558/TFC2016-084

FanZhiping, TuZhihua, QinYanbin, LiFayun

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引用次数: 2

摘要

本研究的目的是基于菲克扩散定律，探讨东方杨柳人工林土壤剖面中CO2的垂直和季节变化。利用埋置在不同深度的CO2传感器连续测量了中国北方针叶林土壤CO2浓度剖面，并利用动态模型计算了CO2通量。CO2浓度和通量的日变化规律在白天波动较大，在夜间变化较小。CO2剖面呈垂直梯度，在最深的土层中浓度最高。CO2通量具有明显的季节特征，夏季最大，冬季最小。H、A、B和C层对总CO2通量的贡献分别为75.38%、13.52%、7.61%和3.49%。H、A、B、C层的Q10分别为2.668、4.469、1.175、3.333。浓度曲线测得的CO2通量与开放式动态CO2通量吻合较好。

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Vertical and seasonal variations in soil CO2 production in a 55-year-old oriental arborvitae (Platycladus orientalis) plantation in China

The aim of this work was to explore the vertical and seasonal variations of CO2 within the soil profile based on Fick’s law of diffusion in an oriental arborvitae plantation. We continuously measured the soil CO2 concentration profile using CO2 sensors buried at different depths in a coniferous forest in northern China and calculated the CO2 flux based on the profile measurements using a dynamic model. The diurnal pattern of CO2 concentration and flux fluctuated during the day and varied less at night. The CO2 profile had a vertical gradient, with the highest concentrations in the deepest soil layers. The CO2 flux had a clear seasonal pattern with a maximum in summer and a minimum in winter. The contributions of the H, A, B, and C horizons to the total CO2 flux were 75.38, 13.52, 7.61, and 3.49%, respectively. Q10 was 2.668, 4.469, 1.175, and 3.333 in the H, A, B, and C horizons, respectively. The CO2 flux determined from the concentration profiles agreed well with the CO2 flux measured by open dynamic ch...

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.