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Indoor testing device for quantitative analysis of farmland nitrogen emission

A quantitative analysis and laboratory test technology, applied in the field of test models, can solve problems such as the inability to organically combine device accessories and large system errors, and achieve the effect of avoiding the Coanda effect, reducing the system error and reducing the system error.

Pending Publication Date: 2019-02-15
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention overcomes the deficiencies in the three aspects of the existing test device, which can only focus on one or two discharge routes of farmland nitrogen, large system errors, and inability to organically combine device accessories, and provides a new indoor test for quantitative analysis of farmland nitrogen discharge device

Method used

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  • Indoor testing device for quantitative analysis of farmland nitrogen emission
  • Indoor testing device for quantitative analysis of farmland nitrogen emission
  • Indoor testing device for quantitative analysis of farmland nitrogen emission

Examples

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example 1

[0034] An indoor test device for analyzing the discharge characteristics of farmland nitrogen through three channels, mainly including a plant cultivation unit, a seepage liquid collection device, a runoff liquid collection device, an artificial rainfall device and a gas collection device. Most of the main body of the device is composed of PVC pipes and their accessories, and a complete set of experimental devices is formed by using existing materials in a precise and ingenious connection mode.

[0035] The plant cultivation unit is composed of equal-diameter cross 1 , plant cultivation unit PVC pipe 3 , concentric reducer pipe 4 , cleaning port 6 , gauze 5 and external plug 2 . The upper end of the PVC pipe 3 of the plant cultivation unit is nested in the lower end of the equal diameter cross 1, the lower end is nested in the upper end of the concentric reducing pipe 4, the lower end of the concentric reducing pipe 4 is closely connected with the cleaning port 6, and the exter...

example 2

[0046] Taking the quantitative analysis of nitrogen emission from rice ecosystem as an example to specifically describe the method of using the indoor device of the present invention to analyze the emission characteristics of three ways of farmland nitrogen, this experiment uses the nitrogen content of two Nipponbare rice strains (codenamed strain one and strain two) Emission characteristics are the research object. The indoor test device of the present invention includes a runoff test part, a leakage test part, a gas loss test part and various component connection parts.

[0047] The plant cultivation unit consists of 110mm equal diameter cross 1, 30cm long plant cultivation unit 110mm PVC pipe 3, 110*50 concentric reducer 4, 50mm cleaning port 6, 120mm double gauze 5 and 110mm external plug 2. The upper end of the 110mm PVC pipe 3 of the plant cultivation unit is nested in the lower end of the 110mm equal-diameter cross 1, and the lower end is nested in the 110*50 concentric...

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Abstract

The invention discloses an indoor testing device for the quantitative analysis of the farmland nitrogen emission, and is used to quantitatively analyze the discharge of farmland nitrogen by three ways, which is surface runoff, leakaging and leaching, and gas loss. The device mainly comprises a plant culturing unit, a leakage fluid collecting device, a runoff liquid collecting device, an artificialrainfall device, and gas collecting device. Most of the main body of the device is made of PVC pipes and its accessories. The plant culturing unit is placed smoothly through a fixing holder, and theleakage fluid can be collected underneath. The plant culturing unit is connected to accessories to collect runoff liquid sample during or after an artificial rainfall. When the gas sample is collected, a sampling space above the plant culturing unit is connected to the gas sampling pump through a plastic hose and a bubble absorbing tube, and the gas sample is collected by an acid absorption methodfor measuring the amount of ammonia volatilization. A hole is opened near the lower end of the gas collecting device body, and the gas sample is taken with a needle tube for measuring the amount of nitrous oxide released.

Description

technical field [0001] The invention relates to a test model, in particular to an indoor test device for farmland nitrogen discharge, which is used for collecting and accurately quantitatively analyzing the discharge of farmland nitrogen through surface runoff, seepage and leaching and gaseous loss. Background technique [0002] There are three ways of farmland nitrogen emission, namely, surface runoff, seepage and leaching, and gaseous loss (including ammonia volatilization and N 2 O release). Whether it is a field test or a small indoor test, predecessors have designed corresponding test models to quantitatively analyze nitrogen emissions from farmland. The surface runoff test devices used in the field test mainly include the cement well method and the finishing box method. The advantage of these test devices is that the concentration of the runoff liquid is more accurate, but the disadvantage is that they cannot control the influencing factors of the surface runoff (such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
CPCG01N33/24G01N33/245
Inventor 张淑娟恽雯斐尤朝阳徐海阳郭欣悦
Owner NANJING UNIV OF TECH
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