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Method and device for in-site detecting soil carbon dioxide flux

A carbon dioxide and measurement method technology, applied in measurement devices, material analysis by optical means, instruments, etc., can solve the problems of inconvenient field observation and use, cannot reflect the original condition of the soil, etc., and achieve direct and rapid measurement results. Determination of actual, theoretically based, reliable effects

Inactive Publication Date: 2007-06-27
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

The advantage of this method is that it is simple and easy to implement, and does not require large and precise instruments and equipment. The disadvantage is that it cannot reflect the original state of the soil. Although the internal structure has been improved (patent documents: CN1525166A, CN2605571Y), it is still not convenient for field observation. and use

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  • Method and device for in-site detecting soil carbon dioxide flux

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Embodiment Construction

[0043] Referring to Fig. 1 and Fig. 2, in general, the soil carbon dioxide flux in situ measuring device of the present invention comprises:

[0044] The bottom ring 3 is pre-fixed on the ground where the carbon dioxide flux of the soil surface layer is to be measured, so as to determine the measured area;

[0045] When the soil carbon dioxide concentration is to be measured, the opening measuring container 6 installed on the bottom ring 3 is sealed;

[0046] Initial carbon dioxide concentration value (X1 ) after sealing the lid 7 of the opening measuring container 6 opening; and

[0047] The carbon dioxide analyzer 1 connected to the open measuring container 6 .

[0048] Wherein, the carbon dioxide analyzer 1 uses infrared rays to measure the carbon dioxide concentration value of the soil.

[0049] Wherein, before the opening measuring container 6 is sealed and installed on the bottom ring 3, the carbon dioxide analyzer 1 is connected with the gas inlet pipe 2 and the exhau...

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Abstract

The method includes steps: fixing up foundation ring on ground to be measured in advance in order to ensure area to be measured; open ended measuring vessel (OEMS) is installed on the foundation ring hermetcally; using capnograph connected to the open ended measuring vessel measures carbon dioxide concentration level inside OEMS so as to obtain initial concentration value X1 of carbon dioxide; sealing opening of OEMS, and together with foundation ring to form a sealed measurement space in order to collect concentration of carbon dioxide released for a duration from soil; using capnograph to measure concentration of carbon dioxide released for a duration from soil so as to obtain real measured carbon dioxide concentration value X2. Features are: simple and easy operation, time saving and low cost.

Description

technical field [0001] The invention relates to a method and a device for measuring carbon dioxide flux, in particular to a method and a device for in-situ measuring soil carbon dioxide flux. Background technique [0002] Soil carbon dioxide flux is the main component of terrestrial carbon cycle (Document 1: Raich, J.W.; Schlesinger, W.S. 1992. The global carbon dioxide flux in soil respiration and its relationship to vegetation and climate. Tellus. 44D: 81-99; Document 2. : Chen Panqin, Huang Yao, Yu Guirui, etc., 2004. Earth system carbon cycle, Beijing: Science Press, 12; Document 3: Zhou Cunyu, 2004, Dinghushan forest surface CO 2 Research on Flux and Its Influencing Factors, Chinese Science Series D Earth Science, 34 (Add): 175-182) Its contribution and influence on the earth's climate change are so great that it has attracted the attention and attention of people all over the world. Accurate carbon accounting of terrestrial ecosystems requires accurate measurement of ...

Claims

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Application Information

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IPC IPC(8): G01N21/17
Inventor 孙向阳高程达
Owner BEIJING FORESTRY UNIVERSITY
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