Indirect determination method of forest soil respiration

A technology for forest soil and measurement methods, applied in soil material testing, material inspection products, etc., can solve problems such as comparison and difficult measurement results, and achieve the effects of small numerical error range, good reliability, and reduced field workload.

Inactive Publication Date: 2010-12-15
ZHEJIANG FORESTRY UNIVERSITY
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However, this relationship is generally only suitable for specific ecosystems, and has relatively large tim

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  • Indirect determination method of forest soil respiration

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Embodiment Construction

[0016] The present invention is described in further detail below in conjunction with embodiment: said five steps of this method, in a nutshell, step (1) to (4) is the basic work before indirect measurement, and its purpose is to set up functional relational expression, step ( 5) For actual measurement work, the two are inseparable. Once the functional relationship is established, it only needs to carry out the actual measurement work in the future. The whole process of this method will be introduced as follows:

[0017] Taking the moso bamboo forest and the evergreen broad-leaved forest of Schima superba as examples, the indirect measurement of forest soil respiration is carried out according to the following five steps:

[0018] (1) is the choice of samples. Select the moso bamboo forest and the evergreen broad-leaved forest of Schima superba that need to be measured for soil respiration, and then use the middle position of the two forest vegetation as a representative sit...

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Abstract

The invention relates to an indirect determination method of forest soil respiration, which comprises the following five steps: 1) selecting sample points; 2) sampling soil samples; 3) determining the content of dissolved organic carbon (DOC) in soil; 4) establishing the linear relation, wherein the linear relation functional expression between the soil respiration and the DOC is that: Y is equal to 0.003X plus 0.1266; and 5) actually measuring the forest soil respiration quantity, substituting the content of the DOC (unit: mg/kg) in the forest soil to be measured into the functional expression in the step 4) as X, and calculating Y which is the quantity of carbon dioxide released from the soil respiration, wherein the unit is g/m<2>/h. The method can calculate the forest soil respiration quantity by determining the dissolved organic carbon in the soil; compared with the static chamber method, the method can reduce the field workload, reduce the determination cost, be capable of carrying out batch analysis, improve the determination working efficiency, realize a small range of numerical errors and have good reliability.

Description

【Technical field】 [0001] The invention relates to a method for measuring forest soil respiration, in particular to a method for indirectly measuring soil respiration by measuring the content of water-soluble carbon in forest soil. 【Background technique】 [0002] An increase in the concentration of atmospheric carbon dioxide will directly lead to an increase in the absorption of long-wave radiation from the sun by the atmosphere, causing a rise in global temperature and causing severe climate fluctuations. Relevant research institutions predict that doubling the concentration of atmospheric carbon dioxide will increase the global temperature by 2-4°C, especially in the polar regions. The rapid melting of the polar permafrost ice has caused the sea level to rise by 5m within 100 to 200 years, greatly reducing the land area and threatening the living safety of humans and land creatures. Therefore, global warming is a hot issue in the current global environmental change researc...

Claims

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Application Information

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IPC IPC(8): G01N33/24
Inventor 吴家森姜培坤刘娟
Owner ZHEJIANG FORESTRY UNIVERSITY
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