How to cultivate purple cabbage

Purple cabbage is also called red cabbage, purple cabbage, etc. This variety has characteristics of good heat and cold resistance, high yield, good tolerance to storage and transportation. Therefore, it has high economic efficiency. Here are some cultivation techniques:
1, nursery. Supply fertilizers to the soil and disinfect the seedbed with fungicide. Soak the seeds 2-4 hours after then choose high germination seeds for sowing.
2, Fix planting. Select the fertile fields with good irrigation conditions. Supply organic fertilizers before fix planting.
3, Field management. When there is high temperature(exceeds 25 ℃ during the day), it is necessary to open the shed to cool the fields. When the temperature is lower than 17 ℃, it is also necessary to close the shed to keep warm. Keep the fields with proper fertilizers and moisture. It is suitable to water in the warm weather. Cloudy weather is not suitable for watering.
4, preventing plant diseases and insect pests.
There are black rot, downy mildew, aphids and cabbage caterpillar and so on. Timely remove the diseased plants, and use chemical solution to spray the fields.If the humidity is high indoors, aerosols can be used to control the diseases and pests. (Reproduced)