Cabbage is cabbage, also known as cabbage, kohlrabi. When planting cabbage on the ground to apply farmyard fertilizer as base fertilizer, 225-300 kg of superphosphate should be used in combination. When cabbage enters the rosette stage, the plant must form a strong assimilation organ, which is the most critical period for absorbing fertilizer and water. At this time, topdressing should be carried out. When nitrogen fertilizer such as ammonium bicarbonate is used, the early maturing variety applies 15-20 kilograms per mu, and the middle and late mature varieties apply 10-15 kilograms per mu. Watering fertilizer. As the temperature rises, cabbage grows into a period of vigorous growth, and early-maturing varieties quickly start to pack and do not need to top-dress. For medium- and late-maturing varieties, when the plants start to pack, apply 15-20 kg of nitrogen fertilizer per acre. Apply fertilizer immediately after top dressing to promote leaf ball growth.
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