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Method for detecting total nitrogen in manure of large-scale cattle farm based on near-infrared transmission-diffuse reflection spectrum

A technology of transmission spectroscopy and detection method, applied in the field of large-scale cattle breeding, can solve the problems such as inability to fully extract feature information, and achieve the effects of simple sample preprocessing, simple method and high analysis accuracy

Inactive Publication Date: 2019-04-12
AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI +1
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Problems solved by technology

However, manure is a complex turbid system with strong light scattering, so it may not be possible to fully extract the characteristic information related to total nitrogen only through near-infrared diffuse reflectance spectroscopy.

Method used

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  • Method for detecting total nitrogen in manure of large-scale cattle farm based on near-infrared transmission-diffuse reflection spectrum
  • Method for detecting total nitrogen in manure of large-scale cattle farm based on near-infrared transmission-diffuse reflection spectrum
  • Method for detecting total nitrogen in manure of large-scale cattle farm based on near-infrared transmission-diffuse reflection spectrum

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Embodiment Construction

[0025] The present invention is further illustrated by the following examples. It should be noted that the following examples are illustrative, not restrictive, and the protection scope of the present invention cannot be limited by the following examples.

[0026] A method for detecting total nitrogen in large-scale dairy farm manure based on near-infrared transmission-diffuse reflectance spectroscopy, the steps of the method are as follows:

[0027] (1) Prepare samples of large-scale dairy farm manure for experiments with different concentrations;

[0028] (2) adopt the Kjeldahl nitrogen analyzer to detect the total nitrogen content in each of the samples, and obtain the total nitrogen concentration matrix in the large-scale dairy farm manure sample used in the experiment;

[0029] (3) scan the transmission near-infrared spectrum and diffuse reflection spectrum of each described sample respectively, obtain the transmission near-infrared spectrum matrix A and the diffuse refl...

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Abstract

The invention discloses a method for detecting the total nitrogen in a manure of a large-scale cattle farm based on a near-infrared transmission-diffuse reflection spectrum. The method comprises the following steps: (1) preparing manure samples of the large-scale cattle farm with different concentrations used for experiments; (2) detecting the total nitrogen content of each sample to obtain a total nitrogen concentration matrix of the manure samples; (3) scanning a near infrared transmission spectrum and a diffuse reflection spectrum of each sample to obtain spectrum matrixes A and B; (4) putting A and B in a column for a fusion to obtain a transmission-diffuse reflection near infrared spectrum matrix of the manure samples; (5) establishing a quantitative analysis model on the transmission-diffuse reflection near infrared spectrum matrix and the total nitrogen concentration matrix; and (6) performing a near infrared transmission spectrum scanning and a diffuse reflection near infraredspectrum scanning on an unknown manure sample to obtain spectrum matrixes M and N; fusing M and N to obtain a transmission-diffuse reflection near infrared spectrum matrix of the unknown manure sample; and substituting the transmission-diffuse reflection near infrared spectrum matrix into the quantitative analysis model to obtain the total nitrogen content in the unknown manure sample.

Description

technical field [0001] The invention belongs to the field of large-scale cattle breeding, and in particular relates to a method for detecting total nitrogen in manure liquid of large-scale dairy farms based on near-infrared transmission-diffuse reflectance spectroscopy. Background technique [0002] At this stage, the safe return of manure to the field after harmless treatment is an important way to solve the environmental problems of large-scale dairy farms in my country. The lack of rapid detection methods for nitrogen and phosphorus is an important technical bottleneck that makes it difficult to return manure to the field. In recent years, the policy documents issued intensively by various functional ministries and commissions of the country clearly pointed out that it is necessary to improve the standard system for the utilization and detection methods of manure returning to the field. Therefore, the establishment of rapid detection methods is of great significance for gu...

Claims

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Application Information

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IPC IPC(8): G01N21/359
CPCG01N21/359
Inventor 赵润杨仁杰张克强刘海学牟美睿王鹏
Owner AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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