Cabbage has strong adaptability to soil, but requires fertile, ventilated drainage, loam with good fertilizer and water retention. It is suitable for neutral soil and has certain adaptability to slightly acidic and slightly alkaline soils. Cabbage has strong salt tolerance and can still form balls on saline-alkali soil with a salt content of 0.75%-1.2%. In the early stage of growth, nitrogen fertilizer is the main factor, and a certain amount of phosphorus and potassium fertilizer is needed in the late growth stage. Cabbage should be rotated with melons, beans, and solanaceous vegetables. It must not be used in conjunction with cruciferous vegetables to prevent serious diseases.
(2) Fertilizer dynamics: Cabbage is a fertilizer-fertilized crop, and the absorption of soil nutrients is greater than that of ordinary vegetables. The dynamics of fattening during seedling, rosette and heading were the same as those of Chinese cabbage. In the first half of the growth period, the absorption of nitrogen was more, and reached the peak during the rosette period. Leaf ball formation has more absorption of phosphorus, potassium and calcium. The ball-forming period is a period in which a large amount of nutrients are absorbed. In this period, nitrogen, phosphorus, potassium and calcium can account for 80% of the total fertility absorption. After planting, the absorption of nitrogen, phosphorus and calcium reached a peak around 35 days, and the absorption of potassium reached a peak around 50 days. Generally, it absorbs more nitrogen, potassium and calcium, and has less phosphorus. The production of 1000 kg of cabbage requires about 3.0 kg of nitrogen, 1.0 kg of phosphorus, and 4.0 kg of potassium, in a ratio of 3:1:4. Therefore, on the basis of the application of nitrogen fertilizer, phosphorus, potassium and calcium fertilizers should be applied to make the ball tight and the clean vegetable rate is high.
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