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1、保暖促长大棚四周底膜要用泥土压严,膜布有洞的要用胶布补好。为防冻可在大棚内搭小拱棚,夜间加盖草帘来增温促长。茄果类蔬菜棚温控制在20—30℃左右。瓜类蔬菜棚温控制在20—25℃,叶菜类控制在15-23℃._ 2、喷防寒剂冬季棚内土温低时,选择晴天上午喷施防寒剂。防寒剂的配方是:每14公斤水加尿素50克、糖100克、磷酸二氢钾50克、绿宝灵15毫升。充分溶解后倒入喷雾器喷雾。将防寒剂喷于叶片背面,每5-7天喷一次。 3、擦膜增光棚膜表面覆盖灰尘、透光率下降.不利于棚温升高。应每隔7-10天擦洗棚膜一次,以提高透光率。 4、通凤降湿棚内土壤湿度高.
1, warm and promote the growth of greenhouses around the end of the film to use strict pressure of soil, membrane cloth holes to use tape to make up. For antifreeze small shed can be taken in the shed, covered with straw curtains at night to increase temperature and promote growth. Solanaceous vegetable shed temperature control in about 20-30 ℃. Cucumber vegetable shed temperature control at 20-25 ℃, leafy vegetables controlled at 15-23 ℃ ._ 2, spray cold agent winter shed temperature is low, select sunny morning spraying cold agent. Cold formula is: every 14 kg of water plus 50 grams of urea, sugar 100 grams, 50 grams of potassium dihydrogen phosphate, Eclogane 15 ml. Fully dissolved into the spray sprayer. Spray cold agent on the back of the blade, spray every 5-7 days. 3, film coating film surface covered with dust, light transmission rate is not conducive to shed temperature rise. Scrub the film every 7-10 days to improve light transmission. 4, Tongfeng wet shed shed high humidity.