1, temperature management. Winter and spring seedlings, covered with plastic film and greenhouse insulation, remove the mulch after emergence. As the temperature rises, the ventilation is gradually increased. Summer and autumn seedlings are covered with nets and membranes (shading nets and plastic film covering), and they are built into small arch sheds with four sides of ventilation, rain and cooling.
2. Fertilizer management. During the whole seedling period, pay attention to watering and keep the soil moist. Watering should be done with small water. Summer and autumn seedlings are carried out in the morning and evening, and winter and spring seedlings are carried out in the sunny morning. After the seedlings are poured, 0.2% urea water is poured once, and then poured once every 10-15 days to promote the growth of the seedlings.
3. Weeding seedlings. Before the seeding, the herbicide can be used 150-200 ml, and the water 70-100 kg can evenly spray the surface to prevent seedlings. When the seedlings have two true leaves, the seedlings are planted at a distance of 1 cm. After that, the seedlings are 1-2 times later, and the seedling distance is about 2 cm. The seedlings should be watered in time. When the seedling height is 10 cm and there are 4-5 true leaves (about 40-50 days), it can be colonized.
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