Purple cabbage has different requirements for various nutrient elements in different growth stages. The early consumption of nitrogen is more and the rosette period peaks. In the leaf formation period, more phosphorus and potassium are consumed. Purple cabbage has more absorption of nitrogen and potassium in three elements and less phosphorus. On the basis of adding nitrogen fertilizer, combined with the application of phosphorus and potassium fertilizers.
About 15 days after planting, the first topdressing was performed, 15-20 kg of ammonium sulfate was applied per 667 square meters, and water was applied immediately after fertilization.
After the first dressing and watering, the rosette leaves flourished and the leaf area expanded rapidly. At this time, watering can be properly controlled and ploughing can be carried out in order to encourage the plant to grow strong without prospering. When the rosette leaves are basically ridged and the balls begin to cling together, they must be topdressed for the second time to promote leaf ball growth. The nodule period is the period with the largest growth of purple cabbage. The growth of this period accounts for about 70%-80% of the total growth. This time, it is generally 20 kg of ammonium sulfate per 667 square meters, 10 kg of potassium sulfate or 100 kg of plant ash. , then watering. During the ball stage, pay attention to timely watering to keep the soil moist, but the water must be selected sunny weather, water can not be cloudy, in the growth process requires more humid environmental conditions. The air humidity should be 80%-90% and the soil moisture should be 78%-80%.
About 15 days after planting, the first topdressing was performed, 15-20 kg of ammonium sulfate was applied per 667 square meters, and water was applied immediately after fertilization.
After the first dressing and watering, the rosette leaves flourished and the leaf area expanded rapidly. At this time, watering can be properly controlled and ploughing can be carried out in order to encourage the plant to grow strong without prospering. When the rosette leaves are basically ridged and the balls begin to cling together, they must be topdressed for the second time to promote leaf ball growth. The nodule period is the period with the largest growth of purple cabbage. The growth of this period accounts for about 70%-80% of the total growth. This time, it is generally 20 kg of ammonium sulfate per 667 square meters, 10 kg of potassium sulfate or 100 kg of plant ash. , then watering. During the ball stage, pay attention to timely watering to keep the soil moist, but the water must be selected sunny weather, water can not be cloudy, in the growth process requires more humid environmental conditions. The air humidity should be 80%-90% and the soil moisture should be 78%-80%.
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