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Grading device and application of organic nitrogen in soil leachate

A soil infiltration and classification device technology, applied in the field of plant nutrition and soil scientific research, can solve the problems of large molecular weight variation and complex organic nitrogen composition, and achieve the effects of accurate classification range, simple operation, and adjustable classification range.

Active Publication Date: 2016-06-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composition of organic nitrogen is complex, and the molecular weight varies greatly. So far, there is still no method to separate different sizes of organic nitrogen and then detect the composition.

Method used

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  • Grading device and application of organic nitrogen in soil leachate
  • Grading device and application of organic nitrogen in soil leachate
  • Grading device and application of organic nitrogen in soil leachate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] see figure 1 The soil leachate organic nitrogen classification device consists of an infusion bottle 1, a flow rate control valve 2, a soil column 3, a filter paper 4, a first liquid collection bottle 5, a switch 6, a first filter 7, a second filter 8, and a third filter. filter 9, air pump 10, second liquid collection bottle 11, support frame 12, infusion bottle 1, soil column 3, first liquid collection bottle 5, first filter 7, second filter 8, third The filter 9 and the second liquid collection bottle 11 are arranged sequentially from top to bottom, fixed by the support frame 12 , and the air pump 10 is connected with the second liquid collection bottle 11 . A switch 6 is arranged below the first liquid collecting bottle 5 .

[0016] Using the device to classify organic nitrogen in soil leachate:

[0017] (1) Device preparation: place pure water in the infusion bottle 1, adjust pH=7.0, the water output rate is regulated by the flow rate control valve 2, the filter ...

Embodiment 2

[0023] (1) Device preparation: place pure water in the infusion bottle 1, adjust pH=7.0, the water output rate is regulated by the flow rate control valve 2, the filter paper 4 with a pore size of 3 microns is placed at the bottom of the soil column 3, and the filter paper 4 is placed on the soil column 3 Add the pulverized soil sample of 2mm sieve, switch 6 is set under the first liquid collection bottle 5, the first filter 7 is placed with a cellulose acetate filter membrane with a pore size of 1.0 micron, and the second filter 8 is placed with a cellulose acetate filter with a pore size of 0.45 micron. A cellulose acetate filter membrane, a cellulose acetate filter membrane with a pore size of 0.22 micron is placed in the third filter 9;

[0024] (2) Accurately weigh the quality of the filter membranes in the first filter 7, the second filter 8, and the third filter 9, and then connect the parts of the device in order, and take the wetland soil samples in the west area of ​​...

Embodiment 3

[0032] (1) Device preparation: place pure water in the infusion bottle 1, adjust pH=7.0, the water output rate is regulated by the flow rate control valve 2, the filter paper 4 with a pore size of 3 microns is placed at the bottom of the soil column 3, and the filter paper 4 is placed on the soil column 3 Add the pulverized soil sample of 2mm sieve, switch 6 is set under the first liquid collection bottle 5, the first filter 7 is placed with a cellulose acetate filter membrane with a pore size of 1.0 micron, and the second filter 8 is placed with a cellulose acetate filter with a pore size of 0.45 micron. A cellulose acetate filter membrane, a cellulose acetate filter membrane with a pore size of 0.22 micron is placed in the third filter 9;

[0033] (2) Accurately weigh the quality of the filter membranes in the first filter 7, the second filter 8, and the third filter 9, then connect the parts of the device in order, take the Xianju alpine soil sample, air-dry it and grind it ...

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Abstract

The invention provides a grading device of organic nitrogen in a soil leachate. The grading device is formed by an infusion bottle, a flow velocity control valve, a soil mass column, filter paper, a first liquid collecting bottle, a switch, a first filter, a second filter, a third filter, an air pump, a second liquid collecting bottle and a supporting frame, wherein the infusion bottle, the soil mass column, the first liquid collecting bottle, the first filter, the second filter, the third filter and the second liquid collecting bottle are sequentially arranged from top to bottom and are fixed by the supporting frame. According to the grading device provided by the invention, by adopting a mode of controlling the filter paper and the pore diameters of filter membranes in the filters, the pore diameters of substances in filter liquor are divided into four micrometer grades of 1.0 to 3.0, 0.45 to 1.0, 0.22 to 0.45 and 0.01 to 0.22, graded measurement on the content and the composition of the organic nitrogen is realized, and the grading device can be applied to grading of the organic nitrogen in the soil leachate. A method is simple and convenient in operation, and the content and the composition of the organic nitrogen in the soil leatchate can be quickly and effectively analyzed.

Description

technical field [0001] The invention belongs to the field of plant nutrition and soil science research, and relates to a device for grading organic nitrogen of soil leachate and its application. Background technique [0002] In the past 30 years, with the wide application of isotope mass spectrometry, nuclear magnetic resonance, gas chromatography and isotope mass spectrometry, many studies have found that organic nitrogen in soil can be used as a plant growth agent under sterile conditions and natural environments. It is an important nitrogen source and has an important impact on plant quality. Soil organic nitrogen mainly includes macromolecular substances such as humus that are difficult to decompose and have a slow turnover rate, and proteins, nucleic acids and free amino acids that are easily decomposed and have a fast turnover rate. Studying the composition of organic nitrogen in soil leachate is conducive to in-depth understanding of the migration and transformation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 马庆旭吴良欢
Owner ZHEJIANG UNIV
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