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Method and device for distinguishing rice respiration, rice rhizospheric respiration and non-rhizospheric respiration

A technology for rice roots and rice is applied in the field of measuring the greenhouse gas emission flux of the rice field ecosystem and the field of devices for measuring the greenhouse gas emission flux of the rice field ecosystem, which can solve the problem of the inability to distinguish the contribution of rice respiration, the inability of plant rhizosphere soil and plant respiration Distinguish and other problems to achieve the effect of accurate and reliable test results, easy control and low technical requirements

Active Publication Date: 2015-08-12
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

[0003] At present, the measurement of greenhouse gas emissions from rice fields is mainly through the static box method to track the flux and rate of greenhouse gas emissions; or to estimate the greenhouse gas emissions of rice fields by measuring soil respiration. However, these methods can only estimate the greenhouse gases of the entire rice field system The emission of rice cannot distinguish the contribution of rice respiration, rice rhizosphere soil, and non-rhizosphere soil
There are also devices that specialize in the study of plant underground respiration flux, but this device only measures the two parts of non-rhizosphere respiration and rhizosphere respiration, and cannot distinguish plant rhizosphere respiration from plant respiration.
At present, there is no means to effectively distinguish the greenhouse gases produced by the various parts of the rice-soil system respiration (such as rice respiration, rice rhizosphere respiration and rice non-rhizosphere soil respiration)

Method used

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  • Method and device for distinguishing rice respiration, rice rhizospheric respiration and non-rhizospheric respiration
  • Method and device for distinguishing rice respiration, rice rhizospheric respiration and non-rhizospheric respiration
  • Method and device for distinguishing rice respiration, rice rhizospheric respiration and non-rhizospheric respiration

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Embodiment 1

[0038] A method for distinguishing paddy rice, rice rhizosphere and non-rhizosphere respiration, the steps are:

[0039] 1. Rice cultivation. Add soil to the base PVC pipe (height × diameter: 25 × 15 cm) for rice planting, take a fresh surface layer (0-20 cm) of paddy soil equivalent to a dry weight of 15-20 kg, and remove visible plant residues. After air-drying, pass through a 2 mm aperture sieve, and spray the mixed solution of ammonium sulfate, sodium dihydrogen phosphate and potassium chloride evenly in the soil, and the amount of nitrogen, phosphorus and potassium applied are 80, 20 and 80 mg / kg soil respectively , the soil is packed into a rhizosphere bag and a base PVC pipe with a length × width of 8 × 4 cm respectively, 500 grams of soil in the rhizosphere bag, and 10 kilograms of soil in a base PVC bucket. Select well-developed rice seedlings with similar individual size, transplant 3 rice seedlings in each rhizosphere bag, and transplant the rhizosphere bags contai...

Embodiment 2

[0051] Combine below figure 1 , figure 2 with image 3 The present invention is described in further detail:

[0052] A device for distinguishing rice, rice rhizosphere and non-rhizosphere respiration, the device includes three connectable rice respiration gas collection chamber 1, non-rhizosphere soil respiration gas collection chamber 9, rhizosphere soil Breathing gas collection chamber 10 is characterized in that: rice breathing gas collection chamber 1, non-rhizosphere soil breathing gas collection chamber 9, and rhizosphere soil breathing gas collection chamber 10 are all provided with an independent electric fan 4 that can be energized, and the electric fan The conductive wire of 4 passes through the plexiglass and seals with neutral silicone sealant, rice is planted in the PVC base 22, and the non-rhizosphere soil respiration air collection chamber 9 is directly inserted into the PVC base 22, and is sealed through the flooded layer; the rhizosphere respiration The a...

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Abstract

The invention discloses a method and device for distinguishing rice respiration, rice rhizospheric respiration and non-rhizospheric respiration. The method comprises the steps of A, planting rice; B, placing the rice on an open space irradiated by light when the rice grows to the growth period, and mounting a collecting device; C, starting an electric fan in an air chamber, uniformly mixing gases, and sequentially extracting greenhouse gases generated by rice plant respiration, rice rhizospheric soil respiration and rice non-rhizospheric respiration; and D, calculating the release fluxes of all parts after testing the concentrations of gas samples. The device comprises a rice respiration gas collecting chamber, a non-rhizospheric soil respiration gas collecting chamber and a rhizospheric soil respiration gas collecting chamber, wherein the rhizospheric soil respiration gas collecting chamber is inserted to a PVC base and is fixed through an organic glass plate by using screw buckles and rubber washers; the rice respiration gas collecting chamber is placed on the non-rhizospheric soil respiration gas collecting chamber and is sealed through screw buckles and rubber washers; and a gas collecting hole is sealed by using a soft rubber plug. The method is easy to realize, simple and convenient to operate and capable of accurately measuring and distinguishing rice respiration, rice rhizospheric respiration and non-rhizospheric respiration.

Description

technical field [0001] The technology of the invention belongs to the technical field of agricultural environmental experiments. More specifically, it relates to a method for measuring the greenhouse gas emission flux of the rice field ecosystem, and also relates to a device for measuring the greenhouse gas emission flux of the rice field ecosystem. This method is suitable for scientific research, teaching and environmental protection departments to measure environmental greenhouse gas emissions. Background technique [0002] Global warming and the destruction of the ozone layer caused by the increasing concentration of greenhouse gases in the atmosphere are today's global environmental problems. carbon dioxide (CO 2 ), methane (CH 4 ) and nitrous oxide (N 2 O) are considered to be the three most important greenhouse gases. There are many sources of greenhouse gas emissions, among which farmland ecosystem plays a very important role in the research of greenhouse gas and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 祝贞科袁红朝葛体达王婷婷陈安磊周萍肖和艾吴金水
Owner INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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