What problems should be paid attention to when transplanting seedlings (factory seedlings) in early spring?

Transplanting planting seedlings should pay attention to two major issues: First, the preparation phase: To make the ground temperature above 12 °C, use a special punch (upper diameter 5.5 cm, lower diameter 3.5 cm, length 7.5 cm), Prepare fine dry soil and a little higher temperature of the root water; Second, the operation process: when taking seedlings, nutritious soil can not be dispersed, when the soil is cultivated, the root can not be broken, the temperature can not be low when watering, and the door should be fenced during ventilation.