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Method for measuring N2O discharge of soil plant system

A plant and soil technology, applied in the direction of measuring devices, special data processing applications, instruments, etc., can solve the problems of the influence of measurement results and the low accuracy of gas chromatography analysis technology, and achieve the effect of accurate and reliable measurement results

Inactive Publication Date: 2007-06-06
SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The object of the present invention is to provide a method of utilizing stable isotope ratio mass spectrometry (IRMS) to measure soil-plant system N 2 The new method of O emission solves the low accuracy of gas chromatography analysis technology alone, and the original N in the air when stable isotope ratio mass spectrometry technology is used alone. 2 O impact on the measurement results and other issues

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  • Method for measuring N2O discharge of soil plant system
  • Method for measuring N2O discharge of soil plant system
  • Method for measuring N2O discharge of soil plant system

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Embodiment Construction

[0034] The present invention selects soybean as the research object, in the growing season of soybean, by measuring the N discharged by soybean, soil, soybean-soil system 2 δ of O 15 N value, calculated by the formula N of soybean in soybean-soil system 2 O's contribution rate. The specific process is as follows:

[0035] 1. Does not contain N 2 O preparation of artificial air

[0036] Use 22% oxygen by volume, 78% nitrogen to add 360ppm carbon dioxide to prepare without N 2 O's artificial air, prepared by Kerui Special Gas Co., Ltd.

[0037] 2. Collection of soil and plant samples

[0038]During the growing season of soybeans, samples of 0-10cm soil and plant branches and leaves were collected respectively. The soil and plant samples should be numbered correspondingly and put into flower pots.

[0039] 3. Gas replacement:

[0040] Wrap the collected soil, plants, and soil-plant systems in transparent plastic bags, with sampling holes left on the plastic bags. Remove ...

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Abstract

The invention relates to method to detect the N20 release of soil-plant system. The invention uses the gas phase chromatography-isotope ratio mass spectrometer coupled device and encases the detected object by the transparence plastic bag. It replaces the bag to remove the N20 in human confecting air, so the N20 in collecting sample would all be released by the detected object to measure the delta15N of N20 in soil, plant and soil-plant system, so it can get the N20 contributing ration of the plant in soil-plant system by the formula. So the method in the invention is accurate to detect the N20 released in soil, plant and soil-plant system.

Description

Technical field: [0001] The invention relates to the technical fields of biological science, environmental science and stable isotope analysis, in particular to a method for measuring soil-plant system N by using stable isotope ratio mass spectrometry (IRMS) 2 A new approach to O emissions. Background technique: [0002] N 2 O is an important greenhouse gas whose single-molecule warming potential is that of CO 2 The contribution to global warming accounts for about 7% of the total contribution of all greenhouse gases. It also participates in the destruction of stratospheric ozone and enhances the ultraviolet radiation on the surface. Atmospheric N 2 The concentration of O is about 310ppbv with an annual growth rate of 0.25%, which means that the current N 2 The increase of O concentration will have a long-term impact on global climate change. [0003] Currently, for the soil-atmosphere interface N 2 The research on O exchange generally adopts closed box method technolo...

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Application Information

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IPC IPC(8): G01N30/02G01N1/22G06F19/00
Inventor 张颖王波徐慧李慧任瑞霞郑循华赵宏德陈冠雄
Owner SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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