Watering: Chinese cabbage from the group to the rosette period, the temperature is gradually decreasing, water can be properly watered here, the water can be properly controlled for several days at the end of the rosette, and then watered after the third top dressing. Fertilization: For the first time, in the 3-4 true leaf stage, apply 10 kg of ammonium sulfate per acre, apply it to both sides of the seedlings, and immediately water it; the second time after the seedling or seedling transplanting, apply sulfuric acid per acre. Ammonium 15~20kg, applied in the ditch on both sides of the ridge; the third time in the rosette period, use 2~3 capsules per acre to apply water to the roots, and then use the sprayer to straighten the roots to improve the nutrient capacity and metabolism of the root canal. Frequency; the fourth time in the middle of the ball, using vegetable strong stems combined with new high-fat film powder to spray the cabbage leaves, can make the stems of Chinese cabbage strong, leaves thick, high yield and quality.
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