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How should winter storage Chinese cabbage be used for base fertilizer and dressing
For northern China with a yield of 6,000 to 8,000 kilograms per mu, it is recommended to use 3000 to 6,000 kilograms of farmyard manure, quaternary compound fertilizer 40 to 60 kilograms, or urea 8 to 10 kilograms, diammonium phosphate 14 in combination with soil preparation. ~ 17 kg (or 40-55 kg of superphosphate), 15-20 kg of potassium sulfate or potassium chloride Top dressing is mainly focused on the early period of Baoxin. It is applied during the early and middle stages of the rosette period and the Baoxin period. A total of 30 to 40 kg of urea is applied per acre. Spraying appropriate amount of calcium fertilizer and boron fertilizer can prevent “dry heartburn†caused by calcium deficiency and increase the yield and quality of commercial vegetables.