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In-situ monitoring soil freeze-thaw device and method for measuring soil carbon loss based on the device

A carbon loss, freezing and thawing technology, applied in measurement devices, soil material testing, instruments, etc., can solve problems such as the inability to monitor the contribution of carbon emissions from specific soil layers, the inability to truly reflect the soil freezing and thawing process, etc., to achieve the effect of improving accuracy

Inactive Publication Date: 2017-07-21
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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-thaw device and method for measuring soil carbon loss based on the device
  • In-situ monitoring soil freeze-thaw device and method for measuring soil carbon loss based on the device
  • In-situ monitoring soil freeze-thaw device and method for measuring soil carbon loss based on the 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

In situ monitoring of soil freezing and thawing device and the method of measuring soil carbon loss based on the device, in order to solve the problem that existing field methods only monitor the carbon emission flux of the entire soil ecosystem, and cannot monitor the contribution of specific soil layers to carbon emissions, and indoor freezing and thawing Thawing simulation experiments cannot truly reflect the problem of soil freezing and thawing process. The soil freezing and thawing device mainly includes a temperature monitor, a soil column chamber, a gas buffer chamber, a rubber sleeve and an air guide pipe. The method of measuring soil carbon loss: put in-situ soil columns of different soil layers into the soil column chamber of the freeze-thaw device, bury them in the corresponding soil layers, monitor the gas CO2 and CH4 emissions during the freeze-thaw period, and compare the freeze-thaw Before and after, the change of soluble organic carbon DOC in the corresponding soil layer was calculated, and then the total amount of soil carbon loss during the freeze-thaw process was calculated. The invention comprehensively calculates the degree of soil carbon loss by synthesizing the change angles of CO2, CH4 emission fluxes and DOC content in different soil layers undergoing freeze-thaw processes, and the precision is increased by 30-50%.

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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Patent Type & Authority Patents(China)
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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