Method for measuring forest soil NO2 emission

A forest soil and measurement method technology, which is applied in the field of indirect measurement of forest soil N2O emissions, can solve the problems of high cost, achieve the effects of reducing measurement costs, reducing field workload, and improving work efficiency

Inactive Publication Date: 2012-02-01
ZHEJIANG FORESTRY UNIVERSITY
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Problems solved by technology

However, due to the lack of fast response detectors, this method has not been used in N 2 It has been applied in the observation of O emission flux, but the current cost is very expensive

Method used

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  • Method for measuring forest soil NO2 emission
  • Method for measuring forest soil NO2 emission

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Embodiment Construction

[0014] The present invention is described in further detail below in conjunction with embodiment: said five steps of this method, in a nutshell, step (1) to (4) is the basic work before indirect measurement, and its purpose is to set up functional relational expression, step ( 5) For actual measurement work, the two are inseparable. Once the functional relationship is established, it only needs to carry out the actual measurement work in the future. The whole process of this method will be introduced as follows:

[0015] Taking the bamboo forest and the evergreen broad-leaved forest as examples, the forest soil N 2 The determination of O emissions is carried out in the following five steps:

[0016] (1) Selection of sample points: Select the soil N to be measured 2 Moso bamboo forest and Schima chinensis evergreen broad-leaved forest with O emissions, and then the middle position of the two forest vegetation was used as a representative site for measuring soil respiration. ...

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Abstract

The invention relates to a method for measuring forest soil NO2 emission. The method comprises the five following steps: firstly, selecting a sampling point; secondly, collecting a soil sample; thirdly, measuring the content of soil dissolved organic nitrogen (DON); fourthly, establishing a linear relation, wherein a linear relation function of forest soil NO2 emission amount and DON is: Y=0.0435X-0.1361; and fifthly, actually measuring the forest soil NO2 emission amount, wherein the content (mg.kg<-1>) of DON in the forest soil to be measured which is used as X is substituted to the function relation formula to solve for Y, i.e. the forest soil NO2 emission amount with the unit of mg.m<-2>.h<-1>. Compared with a static chamber method, the method is used for calculating the forest soil NO2 emission amount through measuring the DON, the field work load is reduced, the measuring cost is lowered, the batch quantity analysis can be carried out, the measuring work efficiency is improved, the obtained numerical error range is small, and the reliability is better.

Description

【Technical field】 [0001] The invention relates to a method for measuring forest soil N 2 A method for the determination of O emissions, especially an indirect determination of forest soil N by measuring the content of water-soluble nitrogen in forest soil 2 Method for the determination of O emissions. 【Background technique】 [0002] N 2 O is one of the greenhouse gases with the strongest warming effect, and its single-molecule warming potential is respectively 2 290 times of CH 4 14 times, and it can also be oxidized into NO in the stratosphere, and then combined with O in the stratosphere 3 react and make O 3 The destruction of the protective layer allows more cosmic rays to pass through the atmosphere and directly endanger the biosphere, thereby seriously affecting human survival and health. According to the analysis of ice core data, the N 2 O concentration is 0.285 μmol·mol -1 , is now 0.310 μmol mol -1 , increasing at a rate of 0.2% to 0.3% per year. 2000N 2 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/33G01N1/04G01N1/28
Inventor 周国模刘娟姜培坤吴家森
Owner ZHEJIANG FORESTRY UNIVERSITY
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