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为解决旺季蔬菜多淡季无鲜菜矛盾,哈尔滨市近年来较快地发展了塑料小棚生产,对缓解哈尔滨市蔬菜生产和供应中的淡旺矛盾起到了较大作用。塑料小棚高0.4～0.6米,跨度为0.7～1.4米。拱杆可用钢筋(6mm)、竹批子和柳条等。多采用聚乙烯覆盖。塑料小栅空间小、热容量小,棚内气温随外界气温变化明显,棚内外温差小,而昼夜温差大。一般早春棚内外温差1～5℃,昼夜温度在
In order to solve the contradiction between fresh season vegetables and low season vegetables, Harbin has developed the plastic shed production more quickly in recent years, which has played a significant role in alleviating the contradiction between the production and the supply of vegetables in Harbin. Plastic shed high 0.4 to 0.6 meters, the span of 0.7 to 1.4 meters. Arch bars available steel (6mm), bamboo and wicker, such as batches. More use of polyethylene cover. Small plastic plastic small space, small heat capacity, shed temperature with the outside temperature changes significantly, shed temperature difference is small, and the temperature difference between day and night. General temperature difference between early and late shed 1 ~ 5 ℃, day and night temperature