Field management
Purple cabbage requires a large amount of fertilizer, in addition to heavy base fertilizer, the seedling period should be less applied organic fertilizer, a small amount of nitrogen fertilizer (7-10 kg/mu ammonium sulfate) should be applied with the water one week after transplanting, and the rosette leaves are formed. Decomposed human fecal urine plus urea, rosette leaves grow maturity to go through the decomposed organic fertilizer plus nitrogen and phosphate fertilizer, Baoxin's early and mid-stage to apply a nitrogen and potassium fertilizers (specific dosage is generally 2000-3000 kg per acre of organic fertilizer, Urea 10-20 kilograms, superphosphate 10-20 kilograms, potassium sulfate 8-10 kilograms). Nitrogen and potash fertilizers can increase the sugar content of purple cabbage. Nitrogen and phosphorus fertilizers can increase the protein content, and the application of phosphorus and potash fertilizers can increase the cellulose content. Therefore, purple cabbage should pay attention to the application of nitrogen, phosphorus and potassium fertilizers, which is the key to high yield and high quality.
Purple Cabbage has a large amount of water and needs to be watered according to weather conditions. In general, one week after transplanting, watering once, do not see dry, the whole growth period must keep moist soil, but the rainy season should pay attention to drainage, if too dry is likely to cause calcium deficiency phenomenon --- "dry heartburn" . In addition, purple cabbage grown on boron-deficient soil will cause the top of the product to be stunted, and the ball will not affect the yield and quality. Therefore, the application of calcium fertilizer and boron fertilizer should also be emphasized in the cultivation of purple cabbage.
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