Isotopic tracer method for determining carbon sources and carbon sinks of perennial vegetation in situ

Abstract

The invention discloses an isotopic tracer method for determining carbon sources and carbon sinks of perennial vegetation in situ. The isotopic tracer method is characterized by comprising the following steps: (1) determining the concentration of carbon dioxide in local air, and marking the concentration as CO; (2) collecting samples (G1, G2 and G3) of a plant-covered land; (3) collecting device gas recovery performance samples (G4 and G5); (4) collecting a local gas carbon dioxide sample (G6); (5) carrying out the steps (1 to 4) in the middle of each month; (6) calculating the carbon sources and the carbon sinks for the CO, the G1, the G2, the G3, the G4, the G5 and the G6, which are obtained in the steps, to obtain the annual breathing carbon amount (A(year), ton) of vegetation per hectare, the annual net fixed carbon amount (B(year), ton) of the vegetation per hectare and the annual fixed carbon amount (D(year), ton) of the vegetation per hectare. The isotopic tracer method has the beneficial effects of high accuracy and simplicity in operation.

Description

technical field [0001] The invention belongs to the technical field of environmental science and technology, and relates to an isotope tracer method for in-situ measurement of perennial vegetation carbon source and carbon sink. Background technique [0002] Human activities have led to a sharp increase in the concentration of carbon dioxide in the atmosphere, and the resulting greenhouse effect and global changes have attracted great attention from countries all over the world. The estimation of carbon sources and carbon sinks has become an important content in the study of adapting to global climate change and the mechanism of increasing sinks and reducing emissions. Scholars at home and abroad have done quantitative research on carbon sinks and carbon sources and their estimation methods. Among them, the carbon balance of terrestrial ecosystems is one of the core issues in global change science, and many research methods for carbon balance of terrestrial ecosystems have b...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an isotope tracer method for in-situ determination of perennial vegetation carbon source carbon s

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