Spectroscopic method for evaluating quality indexes of organic fertilizer

A quality index, organic fertilizer technology, applied in the field of solid organic waste treatment and resource utilization, can solve the problems of time-consuming, heavy pollution and laborious detection methods, and achieve fast sample detection speed, simple operation steps, and high accuracy. Effect

Inactive Publication Date: 2014-02-12
NANJING AGRICULTURAL UNIVERSITY
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Problems solved by technology

[0003] The invention provides a method for evaluating the quality index of organic fertilizer, which is used for fast, accurate and non-destructive evaluati...

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  • Spectroscopic method for evaluating quality indexes of organic fertilizer
  • Spectroscopic method for evaluating quality indexes of organic fertilizer
  • Spectroscopic method for evaluating quality indexes of organic fertilizer

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Embodiment 1

[0029] 1) Selection of organic fertilizer samples and collection of spectral data of organic fertilizer samples. Take organic fertilizer samples from 104 organic fertilizer factories from different sources in Jiangsu Province. Put 104 organic fertilizer samples through an 80-mesh sieve into a petri dish with a diameter of 6 cm, and gently scrape the surface of the sample with the petri dish cover to make the surface of the sample smooth and evenly distributed in the petri dish, and then the fiber optic probe of the AgriSpec portable near-infrared spectrometer of the American ASD Instrument Company was inserted into the organic fertilizer sample to scan, and each sample was scanned 5 times, and the average value of the spectrum was taken as the spectral value of the sample , to reduce the interference of the Petri dish on the spectral measurement. During the spectrum collection process, the parameters were set through the ViewSpecPro software that comes with the instrument, and...

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Abstract

The invention discloses a method for evaluating product quality of commodity organic fertilizer and belongs to the field of solid organic waste treatment. The method comprises the steps of measuring an organic matter content, a total nitrogen content, a moisture content, a pH (Potential of Hydrogen) value, water-soluble organic carbon, water-soluble organic nitrogen, a germinating index and electric conductivity in quality indexes of an organic fertilizer sample, measuring a near infrared spectrum of the organic fertilizer sample, establishing a correction model by a partial least squares method, validating in a leave-one-out cross-validation form to obtain a quantitative correction model, re-optimizing and re-establishing the quantitative correction model by a principal component analysis method to obtain an optimized model, and therefore measuring the quality indexes of unknown samples. The method can evaluate quality parameters of the commodity organic fertilizer quickly and cheaply. In addition, the method has the advantages of no need for a chemical reagent, no destruction, and simplicity in operation when the method evaluates the quality of the commodity organic fertilizer.

Description

technical field [0001] The invention relates to the field of solid organic waste treatment and resource utilization, in particular to a spectroscopic method for evaluating the quality index of organic fertilizer. Background technique [0002] Livestock and poultry manure contains a large amount of various nutrients needed for crop growth, such as nitrogen, phosphorus, potassium and organic matter. pollution and damage to the ecological environment. Therefore, rational use of organic fertilizers produced from livestock and poultry manure and other organic solid wastes in rural areas (such as straw, wood chips, mushroom residues, etc.) can not only avoid unnecessary environmental pollution, but also make rational use of the organic fertilizers in these solid organic wastes. nutrient content. And evaluating the quality parameters of Organic Fertilizers is an essential step to secure the Organic Fertilizers market. Conventional methods for evaluating organic fertilizer qualit...

Claims

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Application Information

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IPC IPC(8): G01N21/31
Inventor 余光辉沈其荣王昶黄驰超李欢冉炜
Owner NANJING AGRICULTURAL UNIVERSITY
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