Flue-cured tobacco dual-aerial-fog seedling raising device and method

Abstract

The invention provides a flue-cured tobacco dual-aerial-fog seedling raising device and method. The device comprises a moisture supply system and a nutrient supply system which are controlled by and connected with a computer control system, and a using method. The flue-cured tobacco dual-aerial-fog seedling raising device and the seedling raising method based on the device have the advantages that the fogdrop diameter is reduced, fogdrop retaining time in air is prolonged, the tobacco seedling root system activity is improved, and meanwhile damage caused by high pressure steam on root systems is reduced. By means of the device and the method, the flue-cured tobacco root system are developed under the stimulation of dual-aerial-fog conditions, the number of fibrous roots is small, tobacco seedlings grow rapidly and are good in quality, temperature, humidity and nutritive liquid supply are controllable, the seedling raising time is shortened, the freezing damage risk is lowered, and the device service life is prolonged.

Description

technical field [0001] The invention belongs to the field of plant cultivation, and in particular relates to a flue-cured tobacco double-air-mist seedling raising device and method. Background technique [0002] Plants need nutrients and water to grow. Aerosol cultivation is a mode in which the roots of plants are completely placed in an aerosol environment for growth and development. It meets the needs of plant roots for water and fertilizer through atomized water vapor, and has the most sufficient oxygen and the most free space to expand. , the root system grows without resistance. The main feature of aerosol cultivation is that the root system is suspended and grown in an aerosol environment, which is different from any other cultivation mode. Aerosol cultivation requires the construction of supporting facilities and equipment, which are mainly composed of three parts: cultivation system, nutrient solution supply and control system, and computer automatic control manage...

AI Technical Summary

Problems solved by technology

[0004] The current atomization method mostly adopts the method of pressure atomization, and the main limitation of pressure atomization is that to ensure the atomization effect, it is necessary to maintain a high pressure of the liquid, resulting in a large impact force of the atomized droplets, resulting in an impact on the plant root system. (That is, root washing phenomenon), if the liquid pressure is reduced, the droplet size formed will be large, and the residence time in the air will be short, and the absorption and utilization rate of the atomized particles of the large particles by the root system will be low.

In a nutshell, the main disadvantages of the method of pressure-type aerosol seedling cultivation are: first, the mist droplets are too large, and the plant absorption efficiency is not high; second, the pressure is too large, and the root system may be damaged.

On the other hand, ultrasonic atomization can solve the shortcomings of pressure atomization, but because the instruments used in ultrasonic atomization are more precise, and the atomized liquid used in plant cultivation is a mixture of nutrient solution and water, which is corrosive to the equipment. And long-term opening affects the service life of the equipment, resulting in a high failure rate of equipment in the ultrasonic atomizer, resulting in high production costs and low stability of the ultrasonic atomization method, which cannot be applied on a large scale

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