2.8 meters wide to improve the type of steel frame greenhouses: such greenhouses by the diameter of 28 to 32 mm, 1.5 mm thick galvanized pipe built from the top of the height of 3.2 to 3.5 meters, the entire body of the greenhouse space is large, suitable for planting high vine vegetables. The advantages are sufficient height and width to successfully improve management efficiency, land utilization and winter insulation. Its disadvantage is the high cost of construction, each square meter cost about 20 to 45 yuan, the cost of 1.5 to 30,000 yuan per acre, more suitable for agricultural demonstration parks and farms with a certain economic strength.
3. Steel and bamboo mixed greenhouses: steel and bamboo mixed greenhouse structure and simple bamboo frame greenhouses the same, to the combination of steel pipe and bamboo frame, with the advantages of saving steel, reduce the cost, easy to operate, and this kind of greenhouse solid, the use of a longer life.