The presence of large consumer markets and the interest in producing out-of-season products and other factors have led to the creation of various horticultural facilities

Rapid economic and cultural growth, population growth, water and soil limitations, the society's need for food, the presence of large consumption markets and interest in the production of off-season products have led to the development of greenhouse crops.

It is necessary to create controlled and covered places to maintain and grow garden plants, especially for areas where there is a risk of adverse weather factors. This issue pursues goals, the most important of which can be called out-of-season production or pre-emption of many products and obtaining products in non-origin countries.

Fortunately, in our country, despite the variety of climates, the importance of horticultural buildings is not as obvious as it is for other countries; Nevertheless, in the last few years, at least in the floriculture sector, significant progress has been observed, and on this basis, various facilities have been established, the most important of which are as follows:

Open air treasury

An open-air tank is a plot or a garden of different sizes that has modified soil and proper drainage.

First, the seeds are planted densely in it, and after sufficient growth, the resulting seedlings are transferred to the main cultivation site. The treasury is used for growing seedlings, preparing vegetables, growing cuttings, etc.

Cold chassis

Cold chassis is the easiest way to protect plants sensitive to cold. Its only source of heat is sunlight.

The simplest cold chassis is a rectangular box whose front wall is shorter than the back wall (the height of the front wall is 20 cm and the back wall is 40 cm). This box is bottomless and covered with glass or plastic.

Cold frames are used to obtain seedlings and to harden the cuttings rooted in the greenhouse.

hot chassis

A warm chassis is like a cold chassis, with the difference that a device is used to provide heat. The heat source of today's modern chassis is the hot water pipe system, steam or hot air flow, as well as thermal cables.

Plastic tunnel

Today, by using plastic tunnels, they cultivate and obtain non-seasonal products. The important point in building plastic tunnels is the precision in the resistance of the pipes used under the name of skeleton and the resistance of plastic against adverse weather factors.

greenhouse

A greenhouse is a suitable space for the growth and development of plants, which is covered with transparent materials for the passage of light, and by controlling environmental factors (temperature, humidity, ventilation and light), it is possible to produce and supply products outside of the season or outside of their original habitat. did

The production of greenhouse products in the rural areas of industrialized countries and with mild weather and moderate temperature is increasing day by day even in the tropics. Cultivating high-quality fruits in even small plots has provided good incomes for the residents.

Greenhouses have created the possibility of cultivation in some dry and tropical and uncultivable areas. Plastic greenhouses are often suitable for moderate climates and in many cases are designed for minimal investment; Because the goal of small systems is high productivity with low costs.