Method for controlling irrigation according to crop water shortage degree and device thereof

A crop and degree technology, applied in watering devices, botanical equipment and methods, measuring devices, etc., can solve problems such as damage, insignificant advantages, and plant destructiveness, and achieve the effect of saving power consumption.

Inactive Publication Date: 2010-08-04
FARMLAND IRRIGATION RES INST CHINESE ACAD OF AGRI SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Although morphological indicators can be used to judge the water shortage of crops, there is a lag period in the morphological changes of crops caused by water shortage. When the above water shortage symptoms appear in the form, the physiology has already been damaged to a certain extent.
In addition, water shortage is not the only cause of crop morphological changes. Even if crop morphological changes are monitored, it is difficult to quantify the degree of water shortage.
[0005] 2. Plant water potential: The measurement of plant water potential is considered to be the most direct method to understand the degree o...

Method used

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  • Method for controlling irrigation according to crop water shortage degree and device thereof
  • Method for controlling irrigation according to crop water shortage degree and device thereof
  • Method for controlling irrigation according to crop water shortage degree and device thereof

Examples

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Embodiment

[0127] Example: see figure 2 , the sun 40 located in the south direction is used to indicate the orientation in the figure; 46 is the detection crop planted horizontally from east to west; the support 41 is used to fix the relative positions of the following parts; it is arranged horizontally from east to west Some horizontally placed rectangular simulated leaves 42 with appropriate gaps and the windshields 43, 44 positioned on the north and south sides of the simulated leaves 42 form reference crops that do not produce transpiration;

[0128]At the east end of the reference crop horizontal in-line arrangement, located directly above the reference crop, the ultrasonic transmitting head 16 above the reference crop and the ultrasonic receiving head 18 above the reference crop are installed horizontally and vertically to the direction of the horizontal in-line arrangement of the reference crop, above the reference crop The ultrasonic transmitting head 16 and the ultrasonic recei...

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Abstract

The invention relates to a method for controlling irrigation according to crop water shortage degree and a device thereof. The method comprises the following steps of: determining a detection time window according to an illumination threshold and an illumination integral threshold; after entering the detection time window, simultaneously emitting ultrasonic waves to ultrasonic reflecting boards which are arranged in right front at equal intervals respectively from the positions approximately above the reference crop and the detection crop and parallel to the planes of the respective crops below at preset time intervals; when receiving the respective reflected ultrasonic waves, respectively starting and stopping the same counter; comparing the counting value with the counting threshold set according to the crop water shortage index in the ultrasonic transition time; and if the counting value is smaller than the counting threshold, the crop water shortage degree requires irrigation, then starting irrigation. The invention has the advantages of fewer detection parameters, no complicated calculation, no detection individual difference, non-contact measurement, and high economy and practicality.

Description

Technical field: [0001] The invention belongs to the technical field of agricultural irrigation, and in particular relates to a method and a device for controlling irrigation according to the water shortage degree of crops. Background technique: [0002] The growth and development of crops requires many environmental factors. When changes in these environmental factors have harmful effects on crops, it is called stress. Crops are often subjected to various environmental stresses during their growth. Studies have confirmed that the impact of water deficit on crop growth and yield exceeds the sum of all other stresses. Therefore, water is an important basic resource for agricultural production, and crop water management is one of the most important measures in crop production. Generally speaking, the root active layer (0-90cm) suitable for the normal growth and development of crops has a soil water content of 60%-80% of the field water holding capacity. If it is lower than t...

Claims

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Application Information

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IPC IPC(8): A01G25/16G01N29/024
CPCY02A40/22
Inventor 高胜国段爱旺黄修桥冯俊杰贾艳辉
Owner FARMLAND IRRIGATION RES INST CHINESE ACAD OF AGRI SCI
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