When choosing purple cabbage varieties, it is recommended to choose early-maturing varieties, such as Muhong, Zaohong, and Zigan No. 1 and No. 2. Taking Nanjing as an example for sowing and raising seedlings, seedlings in protected areas can be sown from mid-December to mid-March. Each acre of land requires 16m2 seedbed and 50 grams of seeds. Before sowing, 20 kilograms of urea and 40 kilograms of compound fertilizer can be applied per acre, and shallow plowing can be done twice. Then sow the seeds. After sowing, be sure to water it thoroughly and then cover it with plastic film to increase the temperature of the seedbed and promote seed germination. After the seeds germinate, the film can be peeled off. After two true leaves have grown, the purple cabbage seedlings should be separated once. The distance between the seedlings and the plant should be about six centimeters, and the weak leaves should be kept strong. The greenhouse temperature can be maintained at 15-20℃, and can be maintained at around 5℃. Low temperature seedling hardening should be carried out before planting. When to plant purple cabbage? High-yielding cultivation and management techniques for purple cabbage No. 3. When choosing a site for planting red cabbage, you should choose a site that is leeward and sunny, has good drainage, and is loose and fertile. 5,000 kilograms of decomposed manure and 100 kilograms of compound fertilizer can be applied per mu.

Remember to plow the field after fertilizing. The width of the field is generally 2m. Field Management After planting purple cabbage, remember to water it slowly. Generally, no more watering is needed. 7-10 days after planting, the temperature is maintained at 25-27°C and 13-15°C. The principle of watering purple cabbage from the seedling stage to the rosette stage is based on the dry and wet conditions of the plot. In the later stage of rosette, if it is an early maturing variety, it is necessary to squat properly and cultivate the seedlings correctly. Two true leaves appear 20-30 days after sowing, during which the temperature is maintained at 25°C and 15°C. After the seedlings are fully grown, they should be lowered to 20°C and lowered to 10°C to prevent the hypocotyl elongation of the seedlings. The seedling stage takes 45-60 days from 3 true leaves to 6-8 true leaves. Exercise at low temperature before planting, keep it at 15℃, keep it at 7-8℃, and gradually approach the open field temperature. Fertilize properly. Purple cabbage is a fertilizer-loving crop and needs to be fertilized under its feet.

Generally, high-quality ring fertilizer, diammonium phosphate or potassium fertilizer should be applied. When fertilizing, it should be combined with plant electronic fertilizer that does not contain fertilizer elements but can exert fertilizer effects other than normal. Utilizing the high-energy electrons generated by the plant's own photosynthesis and the polar induction principle of plant electrons, it can improve the level of cell division, molecular synthesis and nutrient matching digestion, accelerate the metabolic frequency, activate the plant nutrient dredging system, and produce super fertilizer effect. Rake the fertilizer and soil evenly, and then prepare the land to create a 1-1.2m level ridge for colonization. It is not advisable to plant early to avoid premature bolting. Colonization is usually from late March to early April. Use "water to stabilize seedlings", and the amount of water should not be too large to promote rapid seedling slowing, increase ground temperature, and enhance seedling resistance. Applying photosynthetic nutrient film fertilizer along the river can improve the photosynthetic productivity, nutrients and chlorophyll of advanced environmentally friendly plants, and increase yields. , add color, thicken leaves, and strengthen stems.

It can help plants absorb a large amount of light energy, fertilizer and light, and is compatible with conventional fertilizers and nutrients to maximize the supply of plant growth and development. The planting depth is based on the standard that the leaves remain on top and the core leaves are not buried in the soil. On-site management. Fertilize 4-5 times during the seedling stage, rosette stage and covering stage. Among them, the rosette stage, nodulation, and core-wrapping stages require the largest amount of fertilizer and should be reused. After the seedlings have slowed down, water them once. 10-15 days after slowing down the seedlings, add water and urea. In the middle of the rosette stage, apply urea, diammonium phosphate and potassium fertilizer for the second time. It takes about 30-40 days from planting to the rosette stage. The heart leaves begin to internalize, indicating that this is the period when purple cabbage grows the fastest and most, and it is also the period when it requires the most fertilizer and water. Ensuring sufficient fertilizer and water is the basis for growing good leaf balls. Therefore, during the nodulation stage, it is necessary to combine watering and top-dressing ammonium phosphate fertilizer 2-3 times, and spray Vegetable Zhuangganling from the seedling stage to the core wrapping stage to make the plant have thick stems, thick leaves, fresh leaves, lush plants, and natural Strong flavor. At the same time, it can improve the ability to withstand disasters.