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Testing method for total phosphorus content in soil based on image analysis

A measurement method and image analysis technology, applied in the field of soil chemical analysis, can solve the problems of limited application and the inability of digital cameras to split light, etc., and achieve the effects of low measurement cost, fast measurement, and high detection cost.

Inactive Publication Date: 2013-04-24
DALIAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the inability of digital cameras to split light, its application in analytical chemistry is limited

Method used

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  • Testing method for total phosphorus content in soil based on image analysis
  • Testing method for total phosphorus content in soil based on image analysis
  • Testing method for total phosphorus content in soil based on image analysis

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Utilize the inventive method to measure total phosphorus content in soil;

[0045] ① Pretreatment of soil samples by sodium hydroxide melting method;

[0046] Weigh two 0.25g air-dried soil samples that have been ground and passed through a 60-mesh sieve in a crucible, add 0.05ml of absolute ethanol to each part to wet the sample, then add 2.00g of sodium hydroxide and spread it on the sample; place the crucible Put it into a high-temperature electric furnace, first raise the temperature to 200°C, cut off the power for 15 minutes, then raise the temperature to 300°C, and keep the temperature for 15 minutes, take out the crucible and cool it to room temperature, dissolve the frit with 10ml deionized water at 80°C, transfer it to a 100ml volumetric flask, and use 3mol Wash the crucible with / L sulfuric acid and deionized water successively and transfer to a 100ml volumetric flask. After cooling to room temperature, make up to volume, remove insoluble matter, and then make...

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Abstract

The invention provides a testing method for total phosphorus content in soil based on image analysis, and the testing method for the total phosphorus content in soil based on the image analysis relates to the soil chemical analysis. The testing method for the total phosphorus content in the soil based on the image analysis includes the following steps of pretreating soil samples by a method of melting sodium hydroxide, preparing samples, colorating, and acquiring a concentration value c. The step of acquiring the concentration value c includes digital imaging after colorating and image analysis software is used for acquiring red, green, blue (RGB) values of the soil samples. A gray scale value Gr is acquired according to the RGB values, and the concentration value c is acquired according to the grey value Gr. The testing method for the total phosphorus content in the soil based on the image analysis has the advantages of being convenient and fast to test, easy to operate, low in testing cost, and suitable for on-site analysis.

Description

technical field [0001] The invention relates to soil chemical analysis, in particular to a method for determining total phosphorus content in soil based on image analysis. Background technique [0002] Phosphorus has an important influence on the growth and development of crops. Phosphorus is a constituent element of nucleic acid, phospholipids, phytophytes and adenosine phosphate in crops. These organophosphorus compounds play an important role in the growth and metabolism of crops. Normal phosphorus nutrition is conducive to the formation of nucleic acid and nucleoprotein, and accelerates cell division and proliferation. To promote the growth of vegetative bodies, especially in the early growth stage of crops, sufficient phosphorus nutrition is particularly important. The phosphorus absorbed by crops in the early growth stage can be reused to participate in the formation and metabolism of new tissues. Phosphorus is closely related to sugar, nitrogen and fat metabolism in...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 弓晓杰魏婷申贵隽赵婷
Owner DALIAN UNIVERSITY
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