Estimation method for content of copper in soil on basis of visible-light near-infrared spectrum technology

Abstract

The invention relates to an estimation method for the content of copper in soil on the basis of visible-light near-infrared spectrum technology. The estimation method is realized by the following six steps: (1) collecting a soil sample; (2) determining a visible-light near-infrared spectrum; (3) pretreating the spectrum; (4) determining the reference value of the content of copper in soil; (5) establishing an estimation model; and (6) estimating the content of copper in an unknown soil sample. The estimation model between the visible-light neared-infrared reflectivity spectrum and the content of the copper is established by utilizing a wavelet neural network method on the basis of the visible-light near-infrared spectrum technology, so that the visible-light neared-infrared reflectivity spectrum of the unknown soil sample is substituted into the estimation model and further the content of the copper in the unknown soil sample is determined. The estimation method has the advantages that the determination can be performed without direct contact with the sample, and is complete non-destructive measurement, the operation process and the calculation method for the content of the copper in the soil are simple, the determination speed is greatly enhanced, no other chemical reagents need to be added and the like, so that the estimation method is environmental-friendly and pollution-free.

Description

technical field

[0001] The invention relates to the fields of spectral data processing and soil detection, in particular to a method for estimating soil copper content based on visible light near-infrared spectroscopy. Background technique

[0002] Copper (Cu) is an indispensable component of oxidative enzymes or cell-specific structural components in plants, and elevated copper levels can strongly affect the growth and aging processes of chromatin (photosynthetic organ) in plants. The reduction of copper content in soil will affect the photosynthesis and metabolic process of plants, while the increase of copper content in soil will cause plants to absorb excessive copper, making plant cell membranes and membrane systems of various organelles vulnerable to damage and affecting Hypersynthesis process in plants. Therefore, it is particularly important to estimate the content in soil accurately and timely.

[0003] The invention with the application number 201310112158.3 disc...

Examples

Embodiment 1

[0054] Taking the tailings of Jinduicheng Molybdenum Mine in Hua County, Shaanxi Province as the test object, the soil copper content is estimated. The specific steps are as follows:

[0055] (1) Collection of soil samples

[0056] Taking the tailings of molybdenum mine in Jinduicheng, Hua County, Shaanxi Province as the research area, the whole mining area was divided into 10 sub-districts according to the mining situation and surface plant coverage. Each sub-district was randomly collected 6 soil samples according to the method of plum blossom distribution. 60 soil samples were collected, and soil surface samples (0-20 cm) were collected. The soil of each sampling point was put into a different sample box, and the sample label was filled outside the sample bag.

[0057] After the soil samples were brought back to the laboratory, foreign matter such as fragments and pebbles were removed, air-dried and passed through a 2mm nylon sieve, and the screened soil samples were divid...

technical field

[0001] The invention relates to the fields of spectral data processing and soil detection, in particular to a method for estimating soil copper content based on visible light near-infrared spectroscopy. Background technique

[0002] Copper (Cu) is an indispensable component of oxidative enzymes or cell-specific structural components in plants, and elevated copper levels can strongly affect the growth and aging processes of chromatin (photosynthetic organ) in plants. The reduction of copper content in soil will affect the photosynthesis and metabolic process of plants, while the increase of copper content in soil will cause plants to absorb excessive copper, making plant cell membranes and membrane systems of various organelles vulnerable to damage and affecting Hypersynthesis process in plants. Therefore, it is particularly important to estimate the content in soil accurately and timely.

[0003] The invention with the application number 201310112158.3 disc...

Examples

Embodiment 1

[0054] Taking the tailings of Jinduicheng Molybdenum Mine in Hua County, Shaanxi Province as the test object, the soil copper content is estimated. The specific steps are as follows:

[0055] (1) Collection of soil samples

[0056] Taking the tailings of molybdenum mine in Jinduicheng, Hua County, Shaanxi Province as the research area, the whole mining area was divided into 10 sub-districts according to the mining situation and surface plant coverage. Each sub-district was randomly collected 6 soil samples according to the method of plum blossom distribution. 60 soil samples were collected, and soil surface samples (0-20 cm) were collected. The soil of each sampling point was put into a different sample box, and the sample label was filled outside the sample bag.

[0057] After the soil samples were brought back to the laboratory, foreign matter such as fragments and pebbles were removed, air-dried and passed through a 2mm nylon sieve, and the screened soil samples were divid...

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