Design: The design will be suited to the climatic conditions, topography, soil texture and other factors of the project site. The climatic data required for the election of the greenhouse model are: monthly temperatures and relative humidity maxima and minima, wind speed and dominant direction, monthly radiation and precipitations.
Measures: The width and length of the greenhouses are fixed according to the topography, greenhouse model, crop type and crop system (soil or soil-less media).
Type of the structure and internal equipment: Rizkallabros Company has several kinds of greenhouses that can be adapted to any climate (template, tropical, subtropical, cold, etc) or crop type (flowers, vegetables, fresh herbs, etc.). The internal equipment of the greenhouse is chosen according to the climatic conditions.
Roof window: According to the climate conditions, this roof window can stay open or closed. In hot climate, the roof window opening permits reducing the internal high temperature by releasing of the heat outside. In cold zones, it is possible to close the window in order to prevent energy loss. The roof window permits also to reduce the humidity excess in rain conditions.
Curtains: The curtains of greenhouse sides are made of plastic rolls that are enrolled to upper direction, opening lateral windows along the greenhouse side. The curtains can be opened automatically or by manual and electrical roll-up. motor.
Covering: The greenhouses are covered by film plastic 180 microns, PVC, polycarbonate or glass. The polyethylene is the most common film plastic in use. It contains infra red absorbers and reflectors such as IR, UVA, that prevent the loss of wavelength radiation, preventing the loss of energy.
Microclimate control: The microclimate monitoring can be automatically o by hand. We control temperature, relative humidity, radiation, rainfall and wind. Greenhouses require internal equipment for microclimate control, in different forms:
- Air circulation fan.
- Micro-sprayers (Fogers
- Pad cooling (Wet pad
Heating: It is suitable in lower temperatures, in order to obtain good crop development, high yield and good fruit quality.
Substrates: In soil less culture, we use different substrates such as: Perlite, Rock wool, volcanic stone or organic materials.
Containers: The containers for substrates can be in polypropylene or in polystyrene.
Reservoirs: in soil less culture, we need a reservoir for ensure the water supply in emergency case.
Irrigation system: We use the drip irrigation in greenhouses.
Automation: The microclimate, irrigation and fertilization monitoring is done by computation center.