Modern Greenhouses and Their Performances in China

At present, China is being in a time of great development of greenhouse facilities, and the annual increase of large scale greenhouse is more than 100 hm². Since the greenhouse type is various, how to select the type of greenhouse and its environmental control equipment is the principal problem to be solved for every greenhouse constructor according to local condition and planting crops, because it is related to economic benefit. During the period of the Ninth Five Year Plan (1995～2000), on the basis of introducing & learning foreign advanced greenhouse technologies and its cultivation technologies, the greenhouse in China has undergone unprecedented development. But because of greenhouse standard measure hysteresis, the backward design & production technology of different types of greenhouses, particularly, the immature technology of design, type selecting and supplemental technology bring the greenhouse constructors some difficulties on reasonably selecting greenhouse type. In the light of greenhouse type developing in large quantities in China, including glass greenhouse, plastic greenhouse, PC greenhouse, their structural characteristics and major specifications were analyzed, which will hopefully provide necessary technical preferences for designing and building greenhouses.