Experimental method measuring soil respiration via laboratory simulating dry-wet alternate responses

A technology of soil respiration and alternating wet and dry, which is applied in the direction of chemical analysis by titration method, can solve the problems of cumbersome detection methods, large space occupation, inconvenient assembly, etc., and achieve short measurement time, improved accuracy, and low manufacturing cost. Effect

Active Publication Date: 2016-02-03
BEIJING FORESTRY UNIVERSITY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The described experimental method solves the problems in the prior art that the detection metho

Method used

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  • Experimental method measuring soil respiration via laboratory simulating dry-wet alternate responses
  • Experimental method measuring soil respiration via laboratory simulating dry-wet alternate responses
  • Experimental method measuring soil respiration via laboratory simulating dry-wet alternate responses

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Embodiment 1

[0056] An experimental method for measuring soil respiration under a kind of indoor simulated dry-wet alternating response of the present invention comprises the following steps:

[0057] The first step: select wide-mouth bottle 11 and record its weight, numbering one by one, load quantitative air-dried soil in described wide-mouth bottle 11, and record the gross weight of wide-mouth bottle 11 and air-dried soil; Agent bag 16 is suspended in the wide-mouth bottle 11, and the bottleneck of wide-mouth bottle 11 is provided with the rubber stopper 12 with hole that matches with it, and is arranged on the glass tube 13 in the hole of rubber stopper 12 with hole, and makes glass tube The top and the bottom of 13 are respectively arranged on the both sides of rubber stopper 12 with holes, and the top of described glass tube 13 is sheathed with latex tube 14, and the top of latex tube 14 adopts water-stop clip 15 to block, and jar 11 Form a sealed space, and described jar 11 is place...

Embodiment 2

[0071] Such as Figure 8 As shown, the present invention provides embodiment 2, the experimental method of measuring soil respiration under the described a kind of indoor simulated dry-wet alternating response, and the distinguishing feature of embodiment 1 is: the present embodiment 2 adopts the instrument measurement method to discharge the soil respiration Gas is measured; further, measured by a portable gas analyzer 26; specifically includes:

[0072]The first step: select wide-mouth bottle 11 for use and record its weight, load quantitative air-dried soil in said wide-mouth bottle 11, and record the total weight of wide-mouth bottle 11 and air-dried soil; It is suspended in the jar 11. The mouth of the jar 11 is provided with a matching rubber stopper 12 with holes. The rubber stopper 12 with holes is provided with two holes, and each hole is provided with a matching glass tube. 13, and the top and bottom ends of the glass tubes 13 are respectively arranged on both sides...

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Abstract

The invention relates to an experimental method measuring soil respiration via laboratory simulating dry-wet alternate responses. The experimental method at least comprises the following steps: step 1, selecting a wide-mouthed bottle, recording the weight of the wide-mouthed bottle, filling the wide-mouthed bottle with air-dried soil, recording the total weight of the wide-mouthed bottle and the air-dried soil, hanging a desiccant bag in the wide-mouthed bottle, and placing the wide-mouthed bottle in a temperature control system, wherein the wide-mouthed bottle comprises a perforated rubber plug and a glass tube, the perforated rubber plug is arranged at the opening of the wide-mouthed bottle, the glass tube is arranged in the hole of the perforated rubber plug, the top end of the glass tube is sleeved by a latex tube, and the top end of the latex tube is blocked by a flatjaw pinchcock; step 2, measuring gas which is exhausted from soil respiration according an alkali absorption method and an acid-base titration method. The experimental method has the excellent effects that the values of soil respiration within the specified time in the design of different experiments can be achieved, and samples of different numbers can be measured; the operation is simple, convenient and rapid, and the production cost is low; the experimental method can be operated in a common laboratory.

Description

technical field [0001] The invention relates to the technical field of an experimental method for measuring soil respiration, in particular to an experimental method for measuring soil respiration under indoor simulated dry-wet alternating response. 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 environment...

Claims

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Application Information

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IPC IPC(8): G01N31/16
Inventor 王冬梅李梦寻
Owner BEIJING FORESTRY UNIVERSITY
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