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我市西瓜四膜覆盖大棚采用成本低、抗风力强、外形美、建造易的青竹结构拱圆形塑料大棚。1结构 大棚宽4.0～4.5m,高1.8m,长一般以134m为宜。方位纵向南北,大棚内建宽各2m的畦面,每个畦面各盖一层宽2m的地膜。西瓜定植后,在其上方各拱一个宽40～45cm,高30～35cm的小棚,然后在其上方再搭一个宽1.3m、高0.8m的拱棚。2 建造2.1选好棚址 大棚须选在地势平坦、土壤肥沃,排水良好,靠近水源,交通方便,未种过西瓜的田块。2.2建棚规格 大棚栽培的畈面为5～5.5m、大棚覆盖的宽
City watermelon four-covered greenhouses with low cost, strong wind resistance, beautiful appearance, the construction of bamboo green arch structure of circular plastic shed. 1 structure width 4.0 ~ 4.5m wide, 1.8m high, generally 134m long is appropriate. Longitudinal north and south directions, the greenhouse built wide 2m wide noodles, each noodle covered with a layer of wide 2m mulch. Watermelon colonization, the top of each arch a wide 40 ~ 45cm, high 30 ~ 35cm of the shed, and then take a wide 1.3m above it, 0.8m high shed. 2 Construction 2.1 Selected sheds sheds shall be selected in the flat, fertile soil, well drained, close to the water, convenient transportation, not planted watermelon plots. 2.2 shed specifications shed cultivation of noodles for 5 ~ 5.5m, shed wide coverage