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In-situ monitoring soil freeze-thawing device and method for testing soil carbon loss on basis of device

A technology of carbon loss and freezing and thawing, which is applied in the direction of measuring devices, soil material testing, instruments, etc., can solve the problems of being unable to monitor the contribution of specific soil carbon emissions, and cannot truly reflect the soil freezing and thawing process, and achieve the effect of improving accuracy

Inactive Publication Date: 2016-05-11
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing field method only monitors the carbon emission flux of the whole soil ecosystem, but cannot monitor the contribution of a specific soil layer to carbon emission, and the indoor freeze-thaw simulation experiment cannot truly reflect the soil freeze-thaw process. To more accurately estimate the change angle of soil organic carbon during the freeze-thaw process, provide a device for in-situ monitoring of soil freeze-thaw and a method for measuring soil carbon loss based on the device

Method used

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  • In-situ monitoring soil freeze-thawing device and method for testing soil carbon loss on basis of device
  • In-situ monitoring soil freeze-thawing device and method for testing soil carbon loss on basis of device
  • In-situ monitoring soil freeze-thawing device and method for testing soil carbon loss on basis of device

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specific Embodiment approach 1

[0020] Specific embodiment 1: The in-situ monitoring soil freeze-thaw device in this embodiment includes a freeze-thaw column, a temperature monitor 9 and an air duct 6, wherein the freeze-thaw column consists of a rubber sleeve 3, a top cover 7, a bottom cover 5 and a plurality of circular tubes body 8, the longitudinal section of the rubber sleeve 3 is "H" shaped, the central axes of a plurality of circular tube bodies 8 are overlapped to form a long tube body, and the top cover 7 and the bottom cover 5 are respectively added to the two ends of the long tube body, The horizontal rubber plates of the rubber sleeves 3 are used to alternately form the soil column chamber 1 and the gas buffer chamber 2 between the round pipe bodies 8, and a plurality of air holes 3- 1. One end of the air duct 6 communicates with the gas buffer chamber 2, and the other end of the air duct 6 extends above the ground surface. Multiple temperature probes 10 are connected to the temperature monitor 9 ...

specific Embodiment approach 2

[0022] Embodiment 2: This embodiment differs from Embodiment 1 in that the height of the soil column chamber 1 is 10-15 cm.

specific Embodiment approach 3

[0023] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that the material of the circular tube body 8 and the airway tube 6 is hard plastic.

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Abstract

The invention provides an in-situ monitoring soil freeze-thawing device and a method for testing the soil carbon loss on the basis of the device, and aims at solving the problems that the existing wild method can only be used for monitoring the carbon discharge flux of a whole soil ecological system and cannot be used for monitoring the contribution of a specific soil layer to the carbon discharge, and a soil freeze-thawing process cannot be really reflected by indoor freeze-thawing simulation experiments. The soil freeze-thawing device mainly comprises a temperature monitoring instrument, a soil column chamber, an air buffer chamber, a rubber sleeve and an air guide pipe. The method for testing the soil carbon loss comprises the following steps of charging in-situ soil columns of different soil layers into the soil column chamber of the freeze-thawing device; burying the soil columns into corresponding oil layers; in a freeze-thawing period, monitoring the discharge condition of gases CO2 and CH4, and comparing the soluble organic carbon DOC change condition of the corresponding soil layer before and after the freeze-thawing; further calculating the total carbon loss quantity of the freeze-thawing process. The in-situ monitoring soil freeze-thawing device and the method for testing the soil carbon loss have the advantages that the CO2 and CH4 discharge flux of different soil layers and the change angle of the DOC content in the freeze-thawing process are integrated to calculate the soil carbon loss degree; the precision is improved by 30 to 50 percent.

Description

technical field [0001] The invention relates to a device for monitoring soil freezing and thawing and a method for measuring soil carbon loss. Background technique [0002] The alternation of soil freezing and thawing is due to seasonal or diurnal heat changes to form a soil process of repeated freezing and thawing at a certain depth below the topsoil. This phenomenon is very common in soils in middle and high latitudes or high altitudes. The alternation of freezing and thawing changes the soil water and heat conditions and directly affects the biogeochemical cycle of soil elements. The impact of different freeze-thaw patterns on soil biochemical processes may vary greatly, but the degree and biochemical importance of freeze-thaw alternation and its patterns on soil profiles (especially the differences in biochemical processes between topsoil and deep soil) and the nutrient cycle of the entire ecosystem are currently discussed. Sex is still unclear. [0003] In my country...

Claims

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Application Information

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IPC IPC(8): G01N33/24G01N30/02
CPCG01N30/02G01N33/24G01N2030/025
Inventor 张晶盛连喜姚棣夫张超凡
Owner NORTHEAST NORMAL UNIVERSITY
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