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Construction and application of control module for precision irrigation of farmland

A precision irrigation and control model technology, applied in the field of farmland irrigation, can solve the problems of inaccurate irrigation control, poor reliability, inconvenient use and maintenance, etc., and achieve the effect of increasing crop yield, increasing water productivity, and precise irrigation water volume

Inactive Publication Date: 2020-10-09
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a farmland soil effective water content (maximum irrigation capacity) conversion function derived based on soil texture induction, real-time monitoring of soil moisture and crop evapotranspiration (water consumption) data Precise irrigation control model, which is applied to farmland irrigation control, in order to solve the technical problems of inaccurate irrigation control, poor reliability, and inconvenient use and maintenance in the existing technology

Method used

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  • Construction and application of control module for precision irrigation of farmland
  • Construction and application of control module for precision irrigation of farmland

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Construction of farmland precision irrigation control model

[0037] 1. Establish a soil effective water capacity calculation model based on soil texture, such as figure 1 Shown:

[0038] (1) Determine the area to be tested and select a representative field as the test site;

[0039] (2) Take the soil samples of the test site, measure the soil texture (percentage combination of each particle size in the soil to the soil weight), and get the percentage of clay (>0.002mm) and sand (2-0.02mm) in the field soil ( %) data; determined by the pipette method, the operation steps refer to GB7845-87 National Standard of the People's Republic of China: Determination of Forest Soil Particle Composition (Mechanical Composition).

[0040] (3) Measure the soil field water holding capacity and soil withering point data of the corresponding test site respectively;

[0041] Soil field water holding capacity and soil wilting point were measured using the pressure plate metho...

Embodiment 2

[0117] Example 2: Farmland Precision Irrigation Method

[0118] 1. Set up corresponding soil moisture sensors 7 and transpiration and evaporation sensors 2 in the field, lay drip irrigation belts 1, set irrigation controllers 4, install water pumps 6, pipeline flow meters 10, and solenoid valves 11;

[0119] like figure 2 Shown: Soil moisture sensor 7 (tube type, every 20cm is a node layer) is buried in the middle of the field area, transpiration and evaporation sensor 2 is installed in the field, and near the pipe or well that supplies water to the drip irrigation belt 1, but a distance Buildings and trees are larger than 50m and 2m above the ground to ensure accurate transpiration and evaporation data;

[0120]The power supply of soil moisture sensor 7, electromagnetic valve 11, pipeline flowmeter 10 and irrigation controller 4 all adopts solar panel 3+battery, and data line 9 is buried with the power line 8 about 100cm below the ground to avoid farming damage. If the soi...

Embodiment 3

[0124] (1) Test time and place

[0125] From 2018 to 2019, the experimental research was carried out in Xuchang Tobacco Experimental Field of Henan Agricultural University (tobacco), North China University of Water Conservancy and Hydropower Efficient Water Use Experimental Field (winter wheat) and Yuanyang Science and Education Park of Henan Agricultural University (winter wheat).

[0126] (2) Test design and test method

[0127] 4 treatments (3 experimental treatments + 1 control), each treatment repeated 3 times, completely random block arrangement.

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Abstract

The invention discloses construction and application of a control module for precision irrigation of farmland, and aims to solve the technical problems that irrigation control is not accurate enough,reliability is poor, and use and maintenance are inconvenient in the prior art. The invention provides a construction method for the control module for precision irrigation of the farmland and a precision irrigation method for the farmland, and the irrigation water amount is calculated according to the effective soil water capacity of the constructed model, real-time monitored soil moisture content and field evaporation rate. Based on the soil texture, the invention derives a transfer function of farmland soil effective water content (maximum allowable irrigation capacity), real-time monitoredsoil moisture and crop evapotranspiration (water consumption) data to perform real-time quantitative precision control irrigation; intelligent irrigation of the farmland can be realized; the irrigation water amount is accurate; the water-saving effect is obvious; water productivity is increased by 90% or more in comparison with conventional irrigation; and the crop yield is effectively increased,and can be increased by 20% or more per mu.

Description

technical field [0001] The invention relates to the technical field of farmland irrigation, in particular to the construction and application of a farmland precision irrigation control model. Background technique [0002] In agricultural planting, the principle of irrigation is that the amount of irrigation, the frequency of irrigation and the time of irrigation should be determined according to the characteristics of crop water demand, growth stage, climate, and soil conditions, and irrigation should be timely, appropriate, and reasonable. With the increasing shortage of water resources in the world, precision irrigation has become one of the key research directions of agricultural planting. [0003] Chinese patent document CN 104904569 A discloses an intelligent irrigation control system and method based on dynamic water content estimation. The soil environmental data is detected in real time through the soil moisture detection unit, the monitoring communication unit regul...

Claims

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Application Information

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IPC IPC(8): A01G25/16G06F17/18
CPCA01G25/16A01G25/167G06F17/18Y02A40/10
Inventor 魏义长许澍张霞王声锋李道西张磊高世凯葛建坤张昊雷宏军刘佳琪李真真
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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