What types of greenhouses are there and how to choose the size of the greenhouse?

At present, greenhouses have become the mainstay of facility agriculture in my country, especially in the northern region. Due to the severe cold in winter, greenhouses can solve the winter vegetable supply in the northern region and increase farmers' income. At present, the main function of greenhouses is to produce vegetables and raise seedlings. , so the construction scale of the specific greenhouse should be selected according to the specific use.

1. Plastic greenhouse

Generally speaking, plastic greenhouses only use bamboo, wood or steel as supports, and do not use bricks, cement and other materials for construction. They have the characteristics of simple structure and easy construction and dismantling. In the past, in order to save costs, farmers liked to use bamboo as the scaffolding. The main structural materials were later gradually changed to steel frame and steel pipe structures. Greenhouses are mainly used for early-maturing vegetables in spring and delayed cultivation in autumn. Under the influence of plastic greenhouses, agricultural products and fruits will be on the market 30-40 days earlier than crops in the open field. It can also extend the harvest period of solanaceous vegetables to September-October.

2. Plastic small shed

Plastic small arch sheds are widely used in northern my country. They are mainly used for rice seedling cultivation in the north. This kind of small arch sheds are smaller in height and area than plastic greenhouses, and are also easier to dismantle. Local farmers often use them after the seedling cultivation is completed in May. Remove the plastic shed and continue planting other crops.

3. Masonry structure greenhouse

This kind of greenhouse is mainly built with masonry structure. It is superior to the other two types of greenhouses in terms of usage time and thermal insulation performance. It is covered with thick plastic film and thermal insulation quilt, and can be protected by daily lifting of the cover. Increase the temperature in the greenhouse, and the greenhouse can be built into a ventilation firewall. In this way, coal or wood can be burned in the cold season to increase the temperature of the greenhouse, speed up or delay the maturity period of vegetables, control the wrong season of vegetables, and improve planting Benefit, our local area generally uses such greenhouses to grow crops such as cucumbers or leeks. The sales price of cucumbers or leeks that are on the market before the Spring Festival is 2-3 times higher than usual. And because the height of such greenhouses is mostly built to be about the height of a person, it is convenient for farmers to work straight up in the shed and reduces the intensity of labor in the shed.

There are many types of greenhouses. The specific choice should be based on the type of crops actually grown. If it is to be used for a short period of time, try to reduce the investment in the construction of ordinary plastic greenhouses or small arches. If it is to be used for a long time, it is best to build it directly in masonry in one go. Structural greenhouses are also conducive to extending the life of the greenhouse.