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Artificial Light Closed Industrialized Nursery System

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Update time : 2017-09-14 11:13:38

In view of the current domestic vegetable nursery facilities, poor cold insulation, poor nursery technology, seedling management fees, pest control and other defects, the introduction of artificial light-type closed-type factory nursery system, the precise regulation of nursery process of light, Temperature and humidity and other environmental factors, improve the quality of nursery, to achieve continuous annual intensive nursery, shorten the production cycle.

 

The incubator with the main insulation material of the insulation wall can control the exchange of matter and heat energy inside and outside of the system to small, and reduce the energy consumption of the environmental factor regulation. The PLC control system and the air conditioning unit are used to control and adjust the environmental factors such as light, temperature, relative humidity and CO2 concentration in the nursery system. According to the growth habits of different crop seedlings, the optimal environment for seedling development is regulated. The system uses multi-layer cultivation frame, improve the utilization of nursery room space.

High-quality seedling is the necessary prerequisite for the growth and development of plants and the formation of production quality. At present, the developed countries such as the Netherlands and Japan have adopted the artificial light-type closed industrialized nursery system. Compared with the plastic greenhouse nursery system, closed plant nursery system has significant advantages: ① system closed excellent, less ventilation times, the system inside and outside the material (water vapor, CO2, etc.) and heat exchange to small (3) the seed germination rate is high, the emergence of tidy, leaf hypertrophy, stem thirst, the root system is developed, and the nutrient solution is used for the environment, High temperature, humidity and humidity and other environmental factors, to achieve continuous continuous seedling, shortening the use of multi-layer three-dimensional culture rack to improve space utilization; ⑤ can accurately adjust the nursery process of light, temperature and humidity and other environmental factors, Production cycle; ⑥ low labor intensity, seedling management convenience, can significantly reduce labor costs.

Stubs arrangement

The use of artificial light-type closed nursery system, can significantly shorten the nursery stock cycle, improve the production of the plan, according to market demand, continuous crop cultivation. To spinach and lettuce, for example, spinach nursery cycle in 6 to 8 days, 1 year can be planted about 19 cropping; lettuce nursery cycle in 14 to 16 days, 1 year can be planted about 13 stubble.

Natural light cultivation system

Nutrient liquid membrane technology (NFT), leafy vegetables were planted in 1 ~ 2cm deep circulation of the shallow circulation of nutrient solution. On the basis of the production management of plastic greenhouses, the technology of smoothing mobile cultivation, nutrient solution temperature control, modular management of nutrient solution and quality control of vegetables has been integrated to improve the production efficiency of greenhouse natural light cultivation system.

Smooth Mobile Cultivation Technology

The mobile cultivation of the bed is both convenient for the production of leafy vegetables and the full use of greenhouse space. The frame of 
sunmax seedbed is made of high quality hot-dip galvanized aluminum stent and pipe rack, which can be used in the high temperature and high humidity environment of the greenhouse for a long time. The bed can be adjusted with a bolt (0 to 10 cm) with a bolt, and has a deflecting limit. Any two seedbed space can produce about 0.5m of the work channel, greenhouse land utilization can be increased by more than 30%.
 

Nutrient Solution Temperature Regulation and Modular Management Technology

Nutrient solution temperature is an important environmental factor influencing the nutrient absorption of hydroponic plant roots, which has a significant effect on plant water metabolism, mineral absorption, hormone metabolism, growth and development, and photosynthesis. The temperature of the nutrient solution is controlled within the appropriate temperature range of the plant root zone, which plays an important role in the productive potential of the cultivated plant and the efficient cultivation. If the temperature is higher than that of the nutrient solution, the temperature of the nutrient solution will increase by 30 ℃ or more. The high temperature will significantly reduce the dissolved oxygen content in the nutrient solution, Respiration, accelerated root aging; winter root zone temperature is low, plant net assimilation rate decreased, inhibit plant growth and development.

At present, in the production of plastic greenhouses, the measures to reduce the temperature of nutrient solution in summer mainly use groundwater, adding ice pack to nutrient solution, and mechanically compressed refrigeration. However, the use of groundwater, the need for adequate groundwater sources, and easy to cause waste of water resources; to add nutrient solution to the ice bag, that is, time-consuming and laborious, and the effect is not good; mechanical compression refrigeration is not easy to meet the plant plant cultivation and production need. In the winter, the main use of electric heating directly heating the nutrient solution or the electric wire in the cultivation tank to improve the root temperature. But by heating in the nutrient tank directly with the electric heating tube, after a period of heating, the surface of the heating rod will appear Ca2 +, Mg2 + ion scale, thus affecting the nutritional composition of the ingredients stable, the other energy consumption is greater, increase The operating costs of facility production.

The model uses hot and cold water cycle temperature control technology, the planting area of ​​each cultivation unit using a separate sub-tank, the tank is equipped with a separate hot and cold water temperature control coil, with gas hot water boiler or chiller on the coil internal circulating water For heating or cooling. Through the hot and cold water temperature, flow and flow rate settings, making the nutrient solution temperature maintained in the root zone within the appropriate temperature range, can reduce energy consumption on the basis of the realization of nutrient solution temperature control, give full play to cultivated varieties of production potential , To improve the economic benefits of greenhouse cultivation. In addition, according to the production needs, the facility area is divided into several relatively independent planting units, the application of nutrient solution modular management technology for each unit nutrient solution and concentration of the precise management. On the one hand, according to different varieties of vegetables to choose a different nutrient solution to improve the diversity of cultivars, is conducive to the planned production, on the other hand can also effectively prevent the spread of bacteria.
 

Vegetable Quality Control Technology

2 to 4 days before the harvest of vegetables, the nutrient solution was replaced with nitrogen-free nutrient solution, water or an aqueous solution containing a certain amount of osmotic ions, and the purpose of reducing the nitrate content of the hydroponic vegetables and improving the nutritional quality was achieved. In addition, the development of the main pathways for the entry of pests and diseases into the facilities, the development of pests and diseases to reduce the entry into the operating procedures to reduce the risk of pest infestation, combined with the use of green control technology to form an efficient pest control system to improve vegetable products safety.