塑料大棚早春蔬菜低温冷害的防护河北省石家庄农业学校田宝昌塑料大棚保护地采光、通风性能好，春季升温快，栽培叶菜类、果菜类等蔬菜均可收到良好的栽培效果。一般比露地栽培增产５０％以上，甚至成倍增产，而且品质极佳，产品的商品性好。加之塑料大棚建造成本低，管理... Plastic greenhouse early spring chilling injury protection Shibao agricultural school in Hebei Province Tianbao Chang plastic shelter lighting, ventilation, good performance, rapid warming in spring, cultivation of leafy vegetables, fruits and vegetables and other vegetables can receive good cultivation effect. Generally more than the open field cultivation yield more than 50%, or even doubled production, but also excellent quality, good product quality. Coupled with the construction of plastic shed low cost, management ...