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夏季蔬菜栽培的主要不利因素条件是高温多雨,病虫害严重,为解决这一矛盾,夏季蔬菜栽培时采用地膜覆盖和遮荫棚、遮阳网等措施,取得显著成效。其方法是:一、夏季育苗播种以后,要立即在播种畦上搭荫棚在育苗畦两侧埋立柱。立柱入土30厘米,地上100厘米左右,两侧相对立柱间绑上竹杆作拱梁,同侧立柱及拱粱间绑竹杆做横梁,使棚架稳固。在拱梁上覆盖旧塑料薄膜,用压杆把簿膜固定压紧。四周用40目纱网围严。阳光太强时,棚膜上还可以加盖苇帘遮荫降温。这种遮荫棚不仅防雨降温,而且还能防蚜虫传播病毒病。遮光率一般为30%～70%。
In order to solve this contradiction, the main unfavorable factors of summer vegetable cultivation are high temperature and rainy, severe diseases and pests. In the summer cultivation of vegetables, the measures such as mulching and shading shed and shade net are adopted, which have achieved remarkable results. The method is: First, the summer nursery sowing, immediately sow the shade on the shelves on both sides of nursery 畦 buried column. Column into the soil 30 cm, about 100 centimeters on the ground, on both sides of the column between the column tied to tie the arching beam, ipsilateral columns and beams between beams tied beams to make scaffolding solid. Cover the old plastic film on the arch beam, with the pressure bar to fix the film compact. Surrounded by 40 mesh gauze. Sunshine is too strong, the greenhouse film can also be covered with reed shade shade. This shady shed not only rains, but also prevent aphids from spreading the virus. Shading rate is generally 30% to 70%.