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U-shaped layered soil nitrous oxide gas collection method and device

A technology for collecting nitrous oxide and gas, which is applied in the direction of measuring devices, sampling devices, analysis materials, etc., can solve the problem of not being able to collect soil gas anytime and anywhere, and achieve the effect of simple structure, reasonable design and easy operation method

Pending Publication Date: 2021-10-22
INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is conducive to simulating the original paddy soil nitrous oxide (N 2 O) discharge process, overcome the conventional static box gas collection method because of being affected by factors such as temperature, casing size and cause the defect that the measurement result deviates, also overcome at the same time when adopting the location to embed the sampling bottle method to collect soil gas , the defect that soil gas cannot be collected anytime and anywhere

Method used

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  • U-shaped layered soil nitrous oxide gas collection method and device
  • U-shaped layered soil nitrous oxide gas collection method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A kind of U-shaped layered soil nitrous oxide (N 2 O) gas acquisition method, its steps are:

[0030] A. Make a soil sample collection device: use a PVC pipe barrel with an outer diameter (De) of 16cm, an inner diameter (D) of 15cm, and a height (H) of 25cm to make a soil sample collection device, and mark a 20cm depth line and direction arrow on the pipe wall , use PVC board to make the bottom plate of the paired barrel, which is not sealed before sampling.

[0031] B. Make U-shaped gas collecting pipe: use imported silicone tubes (De 14mm, D 10mm, breathable and impermeable, up to 15cm in length (2-8 pieces, depending on the amount used) and seal both ends of the tube with matching silicone plugs for use , used to collect gas samples in each soil layer of the culture soil column. Every two sections of silicone tubes are connected to one end with a U-shaped stainless steel capillary (D 3mm) for later use.

[0032] C. Collection of undisturbed soil column: Use the pre...

Embodiment 2

[0039] according to figure 1 , figure 2 It can be seen that a U-shaped layered soil nitrous oxide (N 2O) gas collection device, this device comprises soil sample culture device, gas flux collection device, stainless steel square plate base (8), stainless steel square plate base (8) and the PVC pipe contact area in soil sample culture device use 704 glue After sealing well, the front cover of gas sample collection is placed on the stainless steel square plate base (8), and the junction is sealed with water. It is characterized in that: the soil sample cultivating device comprises a PVC bottom plate (1), a first PVC pipe (2A), four sets of U-shaped air collecting pipes, a stainless steel needle (6), a first three-way valve (7A), and the PVC bottom plate (1) Set at the bottom of the device, the first PVC pipe (2A) is located above the PVC bottom plate (1), and the connection between the two is sealed with NANDA 704 silica gel. The first PVC pipe (2A) arranges four sets of U-s...

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Abstract

The invention discloses a U-shaped layered soil nitrous oxide gas collection method and device. The method comprises the following steps: A, manufacturing a soil sample collection device; B, manufacturing a U-shaped gas collecting pipe; C, collecting an undisturbed soil column; D, installing the U-shaped gas collecting pipes in the soil layer preformed holes, and installing soil sample culture devices in a combined mode; E, manufacturing a gas flux collecting device; F, adding exogenous urea to the soil surface layer of each treated soil column, performing drying treatment after waterflooding culture, and performing continuous culture; and G, collecting a nitrous oxide emission flux gas sample of the culture soil column on time during culture, collecting a volume gas sample from top to bottom from the layered silicone tube, and measuring the concentration of nitrous oxide gas. The device comprises a soil sample culture device, a gas flux collection device and a stainless steel square plate base. The PVC bottom plate is arranged at the bottommost end of the device, the PVC pipe is located above the PVC bottom plate, and the joint of the PVC bottom plate and the PVC pipe is sealed through silica gel. The method is easy to implement and convenient to operate. The device is simple in structure, low in cost, high in operability, convenient to carry, transport, disassemble and assemble and convenient to observe.

Description

technical field [0001] The invention belongs to the technical field of paddy field soil nitrous oxide emission under the condition of simulating flooding and dryness, and more specifically relates to a U-shaped layered soil nitrous oxide gas collection method, and also relates to a U-shaped layered soil nitrous oxide gas collection method. A device for collecting nitrous gas. Background technique [0002] Nitrous oxide (N 2 O) is an important greenhouse gas, contributing up to 6% to global warming, and its global warming potential is 300 times that of carbon dioxide within 100 years. Atmospheric nitrous oxide (N 2 O) concentration is increasing at a rate of 0.3% per year, nitrous oxide (N 2 O) massive emissions also contributed to the depletion of the ozone layer (Braker, 2011). Paddy soil is one of the main types of farmland soil in my country, and it is an important source of nitrous oxide (N 2 O) emission source, its nitrous oxide (N 2 O) Emissions account for 22% o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22G01N1/26G01N1/10
CPCG01N1/2294G01N1/26G01N1/10G01N2001/1025
Inventor 刘毅俎诗佩郭俊丽姚东良范敏赵诣田美洁魏文学李娟
Owner INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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