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Precautions for Pak Choi Seed Planting
1. It is recommended to use farmyard manure or organic fertilizer as the base fertilizer, but pay attention to fully decomposing it when using it to avoid burns to the root system.
2. Keep the soil moist after the seedlings of Shanghai Green, and water once in the morning and evening when the temperature is high. It requires a lot of water during the growth period and is not cold-resistant, so you should pay more attention to watering, but be careful not to cause soil accumulation. Water, drainage measures should be taken after rain to avoid accumulation of water and retting of roots or cause disease.
3. It has a short growth period. If you want to have a higher yield, the fertilization time is indispensable. The fertilizer should be mainly nitrogen. The concentration should be small in the early stage, and the concentration can be increased appropriately in the later stage. Generally, organic fertilizer is sprayed once a week to harvest. Stop fertilizing in the first 2 weeks.
4. There are many diseases and insect pests in high temperature in summer, so pay attention to timely remove old leaves and diseased leaves. When pests occur, they should be eliminated in time. Phosphorus and potassium fertilizers can also be supplemented appropriately, which is conducive to the disease resistance of plants.
5. The harvest time of Shanghai green must be grasped well. The best harvest time is when the true leaves of Shanghai green reach 10-15 pieces. Early or late harvest will affect the quality and yield of Shanghai green.