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大雾弥漫之日,常伴随着低温、高湿、寡照,这对大棚蔬菜的生长发育极为不利,且容易诱发各种病虫害。一般来说,遇到多雾天气,需采取以下措施对蔬菜大棚进行管理。1.保温防冻:雾天要适当增加覆盖物,防止蔬菜受冻。遇到持续阴、雾天气,覆盖物要适当晚揭,揭开后还应注意观察棚内温度变化,如果稍有下降,应及时覆盖;稍有回升,可以在下午2时以前再把覆盖物重新盖好;如果棚内温度持
Fog on the day of fog, often accompanied by low temperature, high humidity, low according to the growth and development of greenhouse vegetables is extremely unfavorable and easy to induce a variety of pests and diseases. In general, in the face of foggy weather, the following measures should be taken to manage vegetable greenhouses. 1. Insulation antifreeze: Fog day should be appropriate to increase the cover, to prevent vegetables from freezing. Encounter persistent overcast, foggy weather, the covering should be properly exposed later, after opening should also observe the shed temperature changes, if slightly decreased, should be promptly covered; a slight rebound, you can at 2 pm before the cover Re-cover; if shed temperature holding