March 30, 2023
American greenhouse horticulture
The United States greenhouse is mainly used for flower production. The top of the greenhouse is mostly round arched, and a few are roofed. The characteristics of the greenhouse are as follows: External structure of the greenhouse The greenhouse structural material is aluminum alloy. The materials are firm and durable, and the internal space of the greenhouse is large. The span of the greenhouse is 10-20 meters and the length can be 40-60 meters, which is convenient for mechanized operation. The greenhouse is covered with a polyethylene reinforced double inflatable membrane. It is sealed on brackets and trusses with clips or pressure rings. The inflated thickness between the two layers of the film can be about 2.5-5 mm. It is said that this kind of greenhouse can save heat energy by 40%-90 as compared with general glasshouse due to its good sealing performance. %. In addition, due to the smooth and elastic film surface after inflation of the double-layer film, it is more resistant to storms, rain, and snow. Greenhouse internal facilities Greenhouse internal cultivation beds are movable, the cultivation beds are about 0.8 meters away from the ground and can move in both directions along the slide rails. When moving to both ends of the greenhouse, the cultivation beds can also be moved to the above-mentioned concentration by hydraulic devices. Rails are perpendicular to the rails. In order to save space, the top of the greenhouse is equipped with potted hooks, the calendar hooks are fixed on the steel ropes, and the brackets are connected with the trusses. The steel cable is driven by a motor and the position of the potted plants can be controlled at any time to avoid affecting the flowers underneath. . Greenhouse heating equipment can be adapted to steam, hot water, fuel oil, natural gas and other thermal heating. In winter, the internal heating adopts the heating method combining coil and spray; in the summer, the wet pad or spray cooling is used; the winter supplement light source uses high-pressure sodium or metal halide lamps; spray irrigation or drip irrigation is used. All the above parameters are collected by the environment control computer system according to the various transmission devices installed inside and outside the greenhouse, analyzed and decided by the computer, and then the instructions are issued for automatic control.
