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Soil pretreatment and nutrient near infrared spectrum detection method

A near-infrared spectroscopy and pretreatment technology, which is used in measurement devices, analytical materials, preparation of samples for testing, etc. Effect

Inactive Publication Date: 2017-12-22
ZHEJIANG UNIV
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Problems solved by technology

[0006] Finally, in terms of the influence of soil particles on near-infrared detection of soil nitrogen, Annia Garcia et al. found that the size of soil particle size and water content have a greater impact on soil spectral characteristics
When the soil water content is high, it will affect the accuracy of the prediction of soil total nitrogen content by near-infrared spectroscopy
[0007] The above research results show that the use of near-infrared spectroscopy can detect soil nitrogen, and domestic and foreign researchers have improved the accuracy of soil nitrogen detection from the aspects of soil pretreatment, spectral data processing, feature band selection, and modeling method optimization. Accuracy still needs further improvement

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  • Soil pretreatment and nutrient near infrared spectrum detection method

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Embodiment Construction

[0038] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0039] Such as figure 1 As shown, a soil sample pretreatment method for near-infrared spectroscopy detection, including:

[0040] Step 1, utilize 60 mesh sieves to sieve the soil sample;

[0041] Step 2, compressing the soil sample passing through the sieve in step 1 to obtain a soil sample tablet;

[0042] Step 3, drying the compressed soil sample at a drying temperature of 80°C for 3 hours to obtain a pretreated soil sample.

[0043] The size of each soil sample tablet is 10mm×10mm×2mm. The mass of each soil sample before drying was 100 g.

[0044] The optimization process of the soil sample pretreatment method is as follows:

[0045] 1. Sample preparation includes the following steps:

[0046] First, collect soil samples. The soil samples come from red soil samples in Qingyuan County, Zhejiang Province. The soil type is red soil, which is acidic red, and nat...

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Abstract

The invention discloses a soil pretreatment and nutrient near infrared spectrum detection method. A soil sample pretreatment method for near infrared spectrum detection comprises the following steps: 1, sieving soil samples to obtain the soil samples with the granule size of 0.18 mm to 0.28 mm; 2, tabletting the soil sample obtained through screening in the step 1 to obtain soil sample tablets; 3, drying the soil sample tablets at the drying temperature of 80 to 100 DEG C for 2.5 to 3.5 hours to obtain the pretreated soil samples. By the soil sample pretreatment method for near infrared spectrum detection, the detection precision of the nitrogen content of the soil is increased.

Description

technical field [0001] The invention relates to the technical field of soil component detection, in particular to a soil sample pretreatment method and a method for detecting nitrogen content in soil by using near-infrared spectroscopy. Background technique [0002] Soil is the matrix of most crop nutrient sources and an important place for material and energy exchange. Nitrogen content is an important index to measure soil fertility and an important source of nutrients needed for crop growth. Soil nitrogen level is a key factor affecting crop growth. Therefore, quickly and accurately obtaining the nitrogen content in the soil has important guiding significance for understanding soil nutrient information and real-time regulation of fertilizer application. Precise fertilization according to crop needs can meet the nutrient needs of crops while reducing chemical pollution to the environment. Traditionally, chemical methods such as dry burning method are used to detect the co...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N21/359G01N21/3563
CPCG01N1/28G01N1/286G01N21/3563G01N21/359
Inventor 聂鹏程董涛何勇肖舒裴夏正燕
Owner ZHEJIANG UNIV
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