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冬春季节利用棚室生产蔬菜,常会遇到一些低温、阴雨风雪等灾害性天气的危害。对付这些自然灾害的对策是: 1、突遇低温。突然遇到低温,使棚室内突然降温,给蔬菜生产带来严重危害,菜农应每天注意收听天气预报,在寒流来到之前,加强棚室保温措施;如加厚草帘,覆盖棉被,加盖小拱棚,必要也可采取人工加温措施,以防寒流突然袭击。 2、连续阴冷。持续的阴冷低温会给蔬菜生产带来严重不良影响,甚至死苗。这时要晚揭早盖草苫,必要时只在中午揭开2—3小时见光即可。另外,每3—5天擦一次膜,以争取光照。 3、阴天风雪。遇到阴雪天气,及时扫去棚上积雪,防止把
Winter and spring use of greenhouse production of vegetables, often encounter some low temperature, rain, snow and other disastrous weather hazards. Countermeasures against these natural disasters are: 1, Suddenly encountered low temperature. Suddenly encountered low temperature, so that a sudden cooling greenhouse indoor to produce serious harm to vegetables, vegetable farmers should pay attention to listen to the weather every day before the cold came to strengthen greenhouse insulation measures; such as thick straw curtains, covered quilts, plus Cover a small arch, you can also take artificial warming measures to prevent a sudden attack cold spell. 2, continuous cold. Continued cold and cold will have serious adverse effects on vegetable production, or dead seedlings. At this time to cover the grass cover late late, if necessary, only 2-3 hours at noon to see the light can be. In addition, rub the membrane every 3-5 days for light. 3, cloudy snow. Encountered snow and snow weather, swept the shed snow in time to prevent it