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Nutrient solution concentration control method and nutrient solution concentration control system

A control method and technology for a control system, which are applied in the field of nutrient solution concentration control methods and control systems, can solve problems such as the inability to reflect nutrient solution components and changes in water and fertilizer, and non-nutrient interference, so as to promote healthier growth, less equipment, The effect of precise control

Inactive Publication Date: 2016-05-11
TONGJI UNIV
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Problems solved by technology

[0005] The present invention provides a nutrient solution concentration control method and control system in order to overcome the existing EC management method that cannot reflect changes in nutrient solution components and water and fertilizers and is easily disturbed by non-nutrient substances. The method and system of the present invention not only Can reflect the main components of the nutrient solution, and can reduce the interference of non-nutrient substances on the measurement

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  • Nutrient solution concentration control method and nutrient solution concentration control system

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Embodiment

[0040] Such as figure 1 As shown, a nutrient solution concentration control system includes a nutrient solution pool 5, a concentrated nitrate nitrogen fertilizer bucket 1, a concentrated macroelement fertilizer bucket 2, a concentrated trace element bucket 3, and an acid solution bucket 4. The nutrient solution pool 5 is used to accommodate The nutrient solution 6 is equipped with a stirring device 9 inside, the concentrated nitrate nitrogen fertilizer bucket 1 is used to supplement nitrate nitrogen to the nutrient solution, the concentrated macroelement fertilizer bucket 2 is used to supplement macronutrients to the nutrient solution, and the concentrated trace element bucket 3 It is used to add trace elements to the nutrient solution. The acid tank 4 is used to adjust the pH value of the nutrient solution. The nutrient solution pool 5 is equipped with a nitrate nitrogen sensor, an EC sensor, a pH sensor and a liquid temperature sensor. A liquid level maintenance valve 7 is ...

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Abstract

The invention relates to a nutrient solution concentration control method and a nutrient solution concentration control system, wherein the nutrient solution concentration control method and the nutrient solution concentration control system belong to the field of soilless culture in agricultural production. The nutrient solution concentration control method comprises the following steps of setting the concentration value range of nitrate nitrogen in the nutrient solution, electric conductivity range of the nutrient solution and pH value range of the nutrient solution; firstly adjusting the nitrate nitrogen in the nutrient solution to the preset concentration value range, then adjusting the electric conductivity of the nutrient solution to the preset conductivity range, and finally adjusting the pH value of the nutrient solution into the preset pH value range. Compared with the prior art, the nutrient solution concentration control method is advantageous in that the important function of the nitrate nitrogen in plant growth and relatively high content of the nitrate nitrogen in the nutrient solution are utilized; a nitrate nitrogen index is introduced for managing the nutrient solution; and the concentration of the nitrate nitrogen is individually managed for reducing a defect of incapability of reflecting component change of the nutrient solution and interference of nonnutritive substances according to an EC management method.

Description

technical field [0001] The invention relates to a nutrient solution concentration control method and a control system, belonging to the technical field of soilless cultivation. Background technique [0002] Nutrient hydroponics is a new type of soilless cultivation method belonging to hydroponic planting technology. It uses nutrient solution instead of natural soil or substrate to provide water, nutrients and oxygen for plants to ensure the normal growth of crops. The content of each component in the nutrient solution affects the growth of the plant. The concentration of each nutrient component is within the range required for the normal growth of the plant, which can provide effective nutrient supply for the growth of the plant and ensure the healthy growth of the plant. [0003] At present, the widely used nutrient solution concentration management method is the electrical conductivity value (EC) management method, that is, the nutrient solution concentration is managed by...

Claims

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Application Information

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IPC IPC(8): G05D11/13G05D29/00A01G31/02
CPCA01G31/02G05D11/139G05D29/00Y02P60/21
Inventor 陈杰赵世静周全林开颜杨学军吴军辉司慧萍李引祝华军
Owner TONGJI UNIV
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