According to structural, material and functional differences, vegetable greenhouse sheds can be divided into the following types:
1. Plastic greenhouse (single arch shed)
Structure: With bamboo, steel pipe or galvanized steel pipe as the skeleton, covering single or multi-layer plastic film.
Features:
Low cost: Simple construction, short return on investment period.
Good light transmittance: Plastic film has high light transmittance, suitable for the growth of leafy vegetables.
Limited thermal insulation: It is necessary to improve the thermal insulation capacity in winter through multi-layer covering or heating equipment.
Applicable scenarios: vegetable planting, seedling raising, temporary production in spring and autumn.
2. Daylight greenhouse (winter warm greenhouse)
Structure: The north wall adopts earth wall, brick wall or thermal insulation board, the rear roof is inclined, the front roof is covered with plastic film, and the thermal insulation quilt is covered at night.
Features:
Super Insulation: Utilizing the "greenhouse effect" and wall heat storage, it can maintain more than 10 ° C without heating in winter.
Energy-saving and efficient: Solar energy is the main energy source, and the operating cost is low.
Space is limited: There are many columns, and it is more difficult to mechanize the operation.
Applicable scenarios: The production of out-of-season vegetables in winter in the north (such as tomatoes, cucumbers, and colored peppers).
3. Continuous greenhouses
Structure: It is formed by connecting multiple single greenhouses through roofs or side walls, and is covered with glass, PC boards or films.
Features:
Open space: It is convenient for mechanized operation and large-scale production.
Strong environmental control ability: Equipped with ventilation, cooling, heating, fill light and other systems
high cost: suitable for high value-added crops (such as flowers, strawberries, seedlings).
Sub-type:
Glass multi-story greenhouse: high light transmittance, long life, but the highest cost.
PC board multi-story greenhouse: strong impact resistance, heat preservation is better than glass.
film multi-story greenhouse: low cost, but need to change the film regularly.
