A system and method for layered constant pressure infiltration irrigation according to the distribution of plant roots

Abstract

The invention discloses a system and a method for carrying out layered constant-pressure filtration irrigation according to root distribution of plants, and belongs to the field of agricultural water-saving irrigation and automatic control. According to the invention, influence of humidity nonuniformity of surface layer soil and deep layer soil on plant growth is considered, and infiltration irrigation tubes are embedded at proper depths of the surface layer soil and the deep layer soil so as to establish a spatial distribution filtration irrigation system. Soil critical drought humidity values at the surface layer soil and the deep layer soil are used as set values, and soil humidities at the surface layer soil and the deep layer soil are compared with the set values so as to control opening of a water pump and electromagnetic valves. A soil moisture change condition at a specific position is used as an opportunity of closing the electromagnetic valves, and constant-pressure control is carried out by controlling a rotating speed of the water pump, thereby achieving automatic and accurate control on irrigation. According to the system and the method disclosed by the invention, a fertilizer which is necessary for plants is added into water, is directly conveyed to plant roots by the infiltration irrigation tubes, and is directly adsorbed by the plants, so that pollution of the fertilizer to the environment and the underground water is effectively avoided, and the utilization rate and water saving percentage of the fertilizer are greatly improved.

Description

technical field [0001] The invention relates to the field of agricultural water-saving irrigation and automatic control, in particular to a system and method for layered constant-pressure seepage irrigation according to the distribution of plant roots. Background technique [0002] At present, flood irrigation is still the most widely used irrigation method in agricultural production. Although flood irrigation can effectively solve the problem of plant drought, a large amount of water flows from the top to bottom of the soil profile, which not only destroys the soil distribution near the plant root system, but also The fertilizer washes into the deep layer of the soil to pollute the groundwater, which greatly wastes water resources. Therefore, on this basis, the infiltration irrigation method was introduced. Infiltration irrigation is a form of underground micro-irrigation, which means that under low hydraulic pressure, the irrigation water (including soluble nutrients) is e...

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Problems solved by technology

In this patent, the infiltration irrigation pipe is used to provide the water needed for the growth of navel orange fruit trees, but it does not consider whether layered irrigation is required, the impact of surface soil drought on fruit trees, and the impact of pressure changes in water pipes on infiltration irrigation are not considered. influences

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