Hydroponics nutrient solution pH value regulation and control method and device

A technology of hydroponic nutrient solution and control device, which is applied in the direction of fertilization device, liquid fertilizer, fertilizer mixture, etc., which can solve the problems of poor operability and low control precision, and achieve the effects of avoiding obstacles, improving utilization efficiency, and avoiding adverse effects

Inactive Publication Date: 2015-04-29
BEIJING RES CENT OF INTELLIGENT EQUIP FOR AGRI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved in the present invention is to solve the defect of single inorganic acid regulating the pH value of nutrient solution in the prior art
Further, solve the problems of low regulation precision and poor operability existing in the prior art

Method used

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  • Hydroponics nutrient solution pH value regulation and control method and device
  • Hydroponics nutrient solution pH value regulation and control method and device
  • Hydroponics nutrient solution pH value regulation and control method and device

Examples

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Embodiment 1

[0055] Example 1: Water spinach nutrient solution hydroponic culture was carried out in the greenhouse of the experimental zone of the Xiaotangshan National Precision Agriculture Demonstration Base in Changping District, Beijing. The nutrient solution formula used in the system was selected except for nitrate nitrogen, and the concentration of other elements was consistent with the Yamazaki lettuce nutrient solution formula .

[0056] (1) Preparation of nutrient solution: the concentration of various components in the nutrient solution are as follows: calcium nitrate tetrahydrate 118mg / L, potassium nitrate 202mg / L, potassium chloride 149mg / L, ammonium dihydrogen phosphate 57mg / L, magnesium sulfate 123mg / L , The pH value of the nutrient solution is about 7.5, and the pH value of the nutrient solution needs to be adjusted to 5.5±0.1 with 5% nitric acid before use. A total of 100L of nutrient solution was prepared.

[0057] (2) Preparation of mixed acid solution: first dilute concent...

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Abstract

The invention relates to the field of facility agricultural soilless cultivation technologies and devices, in particular to a hydroponics nutrient solution pH value regulation and control method and device. The regulation and control method comprise the following steps: two inorganic acids are mixed to form a mixed acid solution, and the mixed acid solution is added in a hydroponics nutrient solution to carry out pH value regulation and control; preferably, on the premise that the condition that the current pH value of the hydroponics nutrient solution meets a pH threshold value or not is taken as a judging condition, the mixed acid solution is added; the next judgment is carried out after the mixing reaction time is preset at intervals. Through the application of the invention, the defect that excessive single acid radicals in the hydroponics nutrient solution are used is avoided while the pH value of the hydroponics nutrient solution is regulated and controlled, and the content of nitrates in crops can be effectively controlled, so that the threat to the health due to excessive intake of the nitrates is reduced, and meanwhile, the bad effect on the environment can be avoided. The test results show that compared with a method and device for regulating and controlling a pH value with a single inorganic acid, the hydroponics nutrient solution pH value can be regulated and controlled, so that the yield of vegetables is increased by more than 30%, and the utilization efficiency of the hydroponics nutrient solution is improved by more than 10%.

Description

Technical field [0001] The invention relates to the field of facility agriculture soilless cultivation technology and equipment, in particular to a method and device for regulating the pH value of a hydroponic nutrient solution. Background technique [0002] Soilless cultivation adopts nutrient solution or artificial substrate to irrigate the nutrient solution to grow vegetables, which gets rid of the constraints of natural soil, while avoiding continuous cropping obstacles and soil-borne diseases in traditional soil cultivation, and reducing the application of pesticides during vegetable production. , While improving the quality of vegetables, reducing the cost of agricultural production; thus, continuous annual production can be realized, becoming a new way to produce high-yield, high-quality and efficient vegetables. Hydroponics is a fast-growing form of soilless culture technology. Its core is to use nutrient solution instead of soil to provide nutrients to crops. Through the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05G5/23
Inventor 王利春郭文忠陈晓丽薛绪掌聂铭君陈菲
Owner BEIJING RES CENT OF INTELLIGENT EQUIP FOR AGRI
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