Field water-holding capacity measuring method and device

A field water capacity and measurement method technology, applied in the field of field water capacity measurement methods and devices, can solve the problems of time-consuming and large errors, and achieve the effects of speeding up the measurement rate, reducing sampling steps, and calculating accurate

Inactive Publication Date: 2020-02-07
河南锐利特计算机科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the field water holding capacity of my country's land is measured through sampling, drying, grinding, compaction, infiltration, wet sample weighing, drying, dry sample weighing and other processes, and manual operations have the disadvantages of large errors and time-consuming. Therefore, there is a need for a field water holding capacity measurement method and device that can simplify and efficiently measure

Method used

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  • Field water-holding capacity measuring method and device
  • Field water-holding capacity measuring method and device
  • Field water-holding capacity measuring method and device

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Experimental program
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Effect test

Embodiment 1

[0063] Soil field water holding capacity refers to the amount of water held by the soil water content when the capillary suspended water reaches the maximum after the gravity water in the water-saturated soil is completely removed. After flooding, the soil water content will immediately rise to the peak, and then gravity drainage will cause the soil water content to drop almost vertically. After that, there will be an inflection point that deviates from the nearly vertical drop trend. After that, the decline of soil moisture will gradually slow down. The soil corresponding to this inflection point The moisture content is the field capacity of the soil. The soil water holding capacity is calculated by monitoring the soil volumetric moisture content and the measured soil bulk density through the set sensor; this application realizes simple and fast measurement through the measuring device, such as figure 1 As shown, the details are as follows:

[0064] Measurement steps:

[00...

Embodiment 2

[0081] Based on Embodiment 1, this embodiment provides a field water holding capacity measuring device, such as image 3 shown, which includes

[0082] The sensor acquisition module is used to acquire soil volume moisture content and soil temperature;

[0083] The touch screen is used to set the length of time, configure parameters, trigger the sensor acquisition module, and display the soil volumetric moisture content and field water holding capacity in real time;

[0084] The storage module is used to store the collected soil volume moisture content data and calculation data;

[0085] The controller is used to process the soil volumetric moisture content data and calculate its derivative, judge the inflection point according to the derivative, and calculate the field water capacity according to the soil volumetric moisture content corresponding to the inflection point and the measured soil bulk density;

[0086] Wireless module for real-time transmission of soil volumetric...

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Abstract

The invention discloses a field water-holding capacity measuring method and device and relates to the field of field water-holding capacity measurement. The method comprises a step of taking a soil sample and calculating the volume weight of soil, a step of collecting soil volume moisture content according to a set time length, and a step of calculating a derivative of a curve corresponding to soil volume moisture content data, judging an inflection point according to the derivative and a set derivative threshold value, and calculating and transmitting a field water-holding capacity in real time according to the soil volume moisture content corresponding to the inflection point and the soil volume weight. The device comprises a sensor acquisition module, a touch screen, a storage module, awireless module, a power supply module and a controller for calculating the field water-holding capacity according to the soil volume moisture content of the inflection point and the measured soil volume weight. According to the method and the device, the inflection point corresponding to the soil volume moisture content is searched by collecting the soil volume moisture content data, so the soilwater-holding capacity is calculated according to the soil volume weight and the soil volume moisture content, the water-holding capacity is automatically measured, the sampling steps are reduced, and the measurement rate is increased.

Description

technical field [0001] The invention relates to the field of field water holding capacity measurement, in particular to a field water holding capacity measurement method and device. Background technique [0002] Field water holding capacity is a professional term in hydrology. It refers to the soil water content when the capillary water suspended in the soil reaches the maximum, and it is the maximum water capacity that the soil can hold without being affected by groundwater. The form of field water capacity includes: hygroscopic water + film water + suspended capillary water. Field water capacity is the highest soil water content that the soil can maintain stably, and is also the highest soil water content that is effective for crops. As an indicator for the upper limit of irrigation and the calculation of irrigation quota, it has guiding significance for agricultural production and drought resistance. [0003] With the development of agricultural irrigation towards refine...

Claims

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Application Information

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IPC IPC(8): G01N33/24G08C17/02H02J7/35
CPCG01N33/246G08C17/02H02J7/35
Inventor 杨贵松王亚辉崔文四陈灿灿李梦喜刘星宋云锋
Owner 河南锐利特计算机科技有限公司
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