1. The temperature and humidity of the seedbed before controlling the temperature of the seedlings should be maintained. After the seedlings are unearthed, the degree of cooling will not hinder the seedling growth. The daytime bed temperature can be reduced to 15°C-20°C and 5°C-10°C at night until the true leaves are exposed. When the true leaves are exposed, the bed temperature should be raised to a suitable temperature for seedling growth and development, during the day at 20°C to 25°C and at night at 10°C to 15°C.
2, to strengthen the light must be given
Seeds and plants are well lit to ensure smooth photosynthesis. In order to make the seedbed more sunny, improve lighting conditions, under the premise of insulation, the cover as soon as possible to cover the late cover, extend the lighting time. When removing the film, it is necessary to prevent cold air from directly blowing into the seedbed. It is better to spray a new high-fat film to form a layer of polymer film to reduce the seedling damage.3, adjust the humidity of the bed humidity is too high, you can use ventilation and humidity and dry soil or moisture ash to reduce humidity. However, the ventilation and dehumidification should take into account the heat preservation, and it is necessary to consider the weather conditions at that time, so that the seedlings are not subject to frost damage. Spreading a layer of dry soil on a moist bed soil can have the effect of absorbing moisture and reducing humidity, but the soil must be finely smashed and sifted. Dry compost is better, and the dry seedlings are dried. After sweeping the earth, the broom shall be swept away with a broom so that the fine soil will fall and the leaves will not be contaminated. 0.5 kg of fine dry earth will be scattered per square meter of bed soil. Bed soil humidity is too low, can be properly watered, should be a small amount of ground water, bed soil is about to white, open topsoil, bed soil structure is loose, landing where scattered water. Avoid watering in the evening and watering in the rainy days, and avoid excessive watering, resulting in excessive bed humidity.
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