Chinese Cabbage Fertilization Technology in Autumn
1. The amount of organic fertilizer: the output level is between 4500 and 6000 kg/mu, organic fertilizer is applied at 2~3 squares/mu, the yield level is between 3500 and 5000 kg/mu, and organic fertilizer is applied at 2 squares/mu. 2. The output level is 4500-6000 kg/mu: nitrogen fertilizer (N) is 18-23 kg/mu, phosphorus fertilizer (P2O5) is 5-8 kg/mu, and potassium fertilizer (K2O) is 16-20 kg/mu. 3. The output level is 3500~4500kg/mu: nitrogen fertilizer (N) 15~20kg/mu, phosphate fertilizer (P2O5) 4~6kg/mu, potassium fertilizer (K2O) 13~17kg/mu.
If basal fertilizer is not applied with organic fertilizer, nitrogen fertilizer (N) 3~5 kg/mu and potassium fertilizer (K2O) 2~3 kg/mu may be increased as appropriate. For plots prone to the absence of trace elements in boron, or for plots that exhibit boron deficiency symptoms in previous years, one kilogram of borax per acre can be applied before sowing, or 0.1% to 0.5% of borax or boric acid can be used during the late growth stage. The aqueous solution was sprayed on the leaves (also sprayed with Pesticides) and sprayed once every 5 to 6 days with 2 to 3 injections. When the pH of the soil in the southern vegetable fields was less than 5, 100 to 150 kg of quicklime was used per acre. Can reduce soil acidity and calcium supplement. All organic fertilizers and phosphorus and potassium fertilizers were planted or applied as base fertilizers, nitrogen fertilizer was used as the base fertilizer at 30%, and 70% were used as top dressings during the rosette stage and the early filling stage combined with irrigation twice.
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