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1.苗床保温管理 北方烟区早春育苗,一定要夹设风障和进行农膜覆盖,用以保温防风。播种到两片真叶时,苗床要采取密封保温措施。夜间要盖防寒草帘,以防冻苗。两片真叶以后,床内温度不得超过25—30℃,如超过30℃,要及时通风降温,以防高温灼伤幼苗。通风降温时,严防在高温下骤然揭膜,以免烟苗害病,移栽前1周左右,要揭去农膜,以利炼苗。
1. Seedbed insulation North tobacco area in early spring nursery, we must set up wind barriers and cover the plastic sheeting for wind and heat insulation. Seeding to two true leaves, seedbed to take sealing insulation measures. Cold grass curtain to cover at night to prevent frostbite. Two true leaves, the bed temperature shall not exceed 25-30 ℃, such as more than 30 ℃, ventilation and cooling in time to prevent high temperature burns seedlings. Ventilation cooling, to prevent sudden exposure at high temperatures, so as not to smoke seedlings disease, about 1 week before transplanting, to peel off the plastic sheet, in order to benefit Lianmiao.