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A kind of online measurement method of salinization soil salinity

A measurement method and technology of salt content, which is applied in the field of online measurement of salinity soil salinity, can solve the problems of time-consuming and labor-intensive online measurement of salt content, etc.

Inactive Publication Date: 2016-11-16
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide an online measurement method for saline-alkali soil salinity in order to solve the problems of time-consuming sampling and labor-intensive sampling of existing saline-alkali soil salinity measurement methods and low accuracy of online measurement of salinity

Method used

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  • A kind of online measurement method of salinization soil salinity
  • A kind of online measurement method of salinization soil salinity
  • A kind of online measurement method of salinization soil salinity

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specific Embodiment approach 1

[0056] Specific embodiment one: the online measurement method of saline-alkali soil salinity in this embodiment is implemented according to the following steps:

[0057] 1. Establishment of soil salinity inversion model

[0058] 1. Soil cracking experiment

[0059] Select multiple groups of soil samples with different salinity content, air-dry, grind and pass through a sieve with a 2mm aperture, and then divide each group of sieved soil samples into soil sample A and soil sample B, and the Soil sample A was subjected to drying shrinkage cracking experiment. In the drying shrinkage cracking experiment, all soil samples A were first configured into saturated mud with the same water content, and each group of configured saturated mud was poured into 50 cm × 50 cm In a wooden sample box with a size of 3 cm, smooth the mud and place it in the laboratory for natural drying to produce drying shrinkage cracks. When the quality of the sample in the sample box no longer decreases, a dr...

specific Embodiment approach 2

[0111] Embodiment 2: This embodiment differs from Embodiment 1 in that the polynomial method is used in step 1 to extract texture features to perform geometric distortion correction on each cracked soil sample photo. Other steps and their parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0112] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the mass ratio of soil mass to water in the soil extract in the soil salt part of step 1 is 1:5. Other steps and their parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a method for measuring the salt content of saline and alkaline soil on line and aims at solving the problems that the sampling operation is time / labor-consuming and the online measurement precision of the salt content is low in a conventional method for measuring the salt content of saline and alkaline soil on line. The online measuring method comprises the following steps: step 1, acquiring soil cracking sample photos by virtue of a soil cracking experiment, extracting textural features, measuring the salt content in soil, and establishing a soil salt content inversion model; 2, measuring the salt content of field soil on line, calculating a normalized grayscale co-occurrence matrix of the field soil and the textural feature value with the best corresponding fitting relationship, thereby obtaining the preliminary online measurement result of the soil salt content; and step 3, correcting the measurement result of the salt content of the soil according to the maximum value and minimum value of the salt content of the soil sample. According to the method disclosed by the invention, based on the influence of the salt content of the saline and alkaline soil on the soil dry-shrinkage cracking degree, a quantitative model for the textural feature quantity of the cracking sample and the sample salt content is established, and the measurement accuracy is improved.

Description

technical field [0001] The invention relates to an online measurement method of salinity soil salinity, in particular to the establishment of an indoor saline soil salinity inversion model and the online measurement method of soil salinity through online measurement of saline-alkali soil texture features. Background technique [0002] Soil salinization is a worldwide land degradation process, which seriously damages the soil properties and reduces the yield of crops to a large extent, and also has great harm to the ecological environment. Therefore, rapid and accurate measurement of soil salinity level has important practical significance for determining the degree of soil salinization and guiding the improvement of salinized soil. At present, the traditional salinity measurement method is mainly determined by field sampling and indoor measurement of the total content of each salt ion in the soil. This method of soil salinity measurement is time-consuming and laborious and c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24G06F19/00
Inventor 任建华赵凯李晓洁
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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