1. The basal fertilizer is applied once with high-quality farmyard fertilizer 2 square meters/mu. 2. Yield level above 6500 kg/mu: nitrogen fertilizer (N) 18~20 kg/mu, phosphate fertilizer (P2O5) 8~10 kg/mu, potash fertilizer (K2O) 14~16 kg/mu. 3. Output level 5500~6500 kg/mu: nitrogen fertilizer (N) 15~18 kg/mu, phosphate fertilizer (P2O5) 6~8 kg/mu, potassium fertilizer (K2O) 12~14 kg/mu. 4. The level of output is 4500 ~ 5500 kg/mu: nitrogen fertilizer (N) 13~15 kg/mu, phosphate fertilizer (P2O5) 4~6 kg/mu, potassium fertilizer (K2O) 8~10 kg/mu.
For the “gravity burned†serious lands in previous years, attention was paid to controlling nitrogen and calcium supplementation, and 0.3%~0.5% calcium chloride (CaCl2) solution could be sprayed 2~3 times from the rosette stage to the later stage. When the vegetable garden soil pH is less than 5, 100-150 kg of lime should be applied per acre; when the soil pH is less than 4.5, 150-200 kg of lime should be used per acre. For the boron-depleted land mass, borax 0.5~1 kg/mu can be applied, or borax solution with 0.2%~0.3% foliar spray can be applied 2~3 times. At the same time, spraying 0.5% potassium dihydrogen phosphate 2~3 times can be combined with spraying to increase the net rate and commodity rate of cabbage. Nitrogen and potassium fertilizers were applied at 30% to 40%, and 60% to 70% were applied in two stages in the rosette stage and early ball stage. The phosphate fertilizers were all applied as base fertilizers or acupoints.
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