Chinese cabbage has a short growth period, a high yield, and a large amount of fertilizer. Different growth periods have different responses to fertilizers. In the process of its vegetative growth, it goes through the seedling stage, the rosette stage, and then enters the heading stage to form a product. During the vegetative growth period, sufficient nitrogen is of special significance to promote the formation of large green leaves and improve photosynthetic efficiency. The general characteristics of fertilizer absorption are: less nutrients are absorbed in the seedling stage, and the absorption of nitrogen, phosphorus, and potassium is less than 1% of the total absorption; the rosette stage is significantly increased, accounting for about 30% of the total; the nutrient absorption in the core stage is the most. , Accounting for about 70% of the total. The maximum absorption of potassium during the whole growth period, followed by nitrogen and calcium, and less absorption of phosphorus and magnesium. It takes about 1.82 kg of N1.82 kg, P2050.36 kg, K202.82 kg, Ca0l.61 kg, and Mg00.21 kg to produce 10o0 kg of Chinese cabbage. The ratio is 5:1:7.8:4.5:0.6.

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