1. Before emergence. Keep the Putian box clear, and the compartment is moist and not water. Check the film at any time and find that the film is opened or otherwise opened. It should be covered in time. If there is no wind and high temperature, it should be ventilated at about 10 o'clock in the morning to prevent high temperature cooking. After the needle is in the green, if the temperature inside the film is higher than 30 °C, the two ends of the membrane should be uncovered to cool down.
2. After emergence. When the seedlings are one leaf and one heart, the two sides of the box at the noon on the sunny day pay attention to the film ventilation, and the cover is covered in the evening. 1 leaf 1 heart began to refine the seedlings, keep the soil dry to promote root growth, the film temperature should be maintained at 20-25 ° C, should not exceed 35 ° C. The chute is too long, the temperature is too high, except for the two films to be uncovered, the film should also be peeled off in the middle to prevent burns and seedlings, and gradually increase the time for refining. During the breeding period, if the seedlings have diseases such as cotton rot, they should be disinfected with Dixon (500 times liquid) or copper sulfate.
3, refining the seed to uncover the film. After fully refining the seedlings, the film was uncovered at 2.1-3 leaves. It is best to uncover the film and choose the sunny day in the afternoon to fill the film in the trench to prevent the dead seedlings. After uncovering the film, continue to cover the film in case of continuous rainy weather or extreme cold weather. When 2 leaves and 1 heart, 1.5-2 kg of urea per acre is used as the weaning fertilizer.
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