Method and device for determining content of organic matters in black soil in Northeast China based on spectral characteristic wavelength

Abstract

The invention provides a method and a device for determining the content of organic matters in black soil in Northeast China based on a spectral characteristic wavelength. The method comprises the following steps: collecting soil light reflectance values on 10 signature wavelengths, wherein the characteristic wavelengths are 400nm, 730nm, 1026nm, 1296nm, 1544nm, 1885nm, 1912nm, 2013nm, 2205nm and 2314nm; converting the soil light reflectance values into soil absorbance values; calculating the content of the organic matters in the soil by the soil absorbance values of the characteristic wavelengths through a multiple linear regression equation. The device comprises a spectrum collection device and an embedded type processing device, wherein the spectrum collection device comprises a base, a sample box, a cylindrical rotary table and a bracket fixedly arranged on a base plate; the sample box is fixedly arranged on the upper surface of the base and the embedded type processing device is mounted inside the base; the rotary table is vertically arranged rightly above the sample box by the bracket. The method and the device provided by the invention have the beneficial effects that the content of organic matters in the black soil in Northeast China is detected rapidly, the detection time is shortened and the cost is reduced.

Description

technical field [0001] The invention relates to a method and device for measuring the organic matter content of northeast black soil based on spectral characteristic wavelengths. Background technique [0002] Soil organic matter is mainly composed of organic compounds formed by the transformation and degradation of biological remains, including cellulose, fatty compounds, crude protein, and various simpler degradation products and humus polymers. It is one of the core indicators of soil fertility. Rapid detection of soil organic matter content is of great significance for precision agriculture. The northeast black soil area is one of the four major black soil belts in the world, mainly distributed in the eastern part of the Songnen Plain. The black soil in Northeast my country has high organic matter content and fertile soil, and is an important commercial grain production base in China. In recent years, due to over-exploitation, the content of organic matter in black soil...

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Problems solved by technology

[0004] Aiming at the shortcomings of the traditional soil organic matter testing method, such as complex steps, long test period, and the need for a large amount of chemical reagent

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