Plastic greenhouse, commonly known as cold shed, is a simple and practical protective field cultivation facility. Due to its easy construction, convenient use and low investment, with the development of the plastic industry, it has been widely adopted by countries all over the world. Use bamboo, wood, steel and other materials, and cover with plastic film, to build an arched shed for cultivating vegetables, which can increase the supply of vegetables earlier or later, increase the yield per unit area, and help prevent natural disasters, especially in the early spring and late autumn in the low season. Serve fresh and tender vegetables.
The plastic greenhouse makes full use of solar energy, has a certain heat preservation effect, and can adjust the temperature and humidity in the shed in a certain range by rolling the film. Therefore, plastic greenhouses in northern my country mainly play the role of heat preservation cultivation in advance of spring and postponement of autumn. Generally, spring can be advanced 30-35 days, and autumn can be delayed 20-25 days, but overwintering cultivation is not possible; in my country In the southern region, plastic greenhouses can be used for heat preservation and overwintering cultivation of vegetables and flowers in winter and spring, and can also be replaced with shading nets for shade cooling, rain, wind, and hail prevention in summer and autumn.
my country has a vast territory and a complex climate. The use of plastic greenhouses for the cultivation of vegetables and flowers has played a special and important role in alleviating the contradiction between supply and demand of vegetables in the off-season. It has significant social benefits and huge realistic economic benefits.
