Medium fertility level, 1 mu target production 2000 to 2500 kg. The fertilization rate per mu for the whole growing period of broccoli is 2500 to 3,000 kg of farmyard fertilizer (350 to 400 kg of commodity organic fertilizer), 20 to 23 kg of nitrogen fertilizer (N), 6 to 8 kg of phosphorus fertilizer (diphosphorus pentoxide), and potassium fertilizer (potassium oxide) ) 11 to 14 kg. Nitrogen and potassium fertilizers were applied to the sub-basal fertilizer and the topdressing was applied 3 times. The ratio of fertilizer application was 2 to 3 to 3 to 2. Phosphate fertilizers were all used as base fertilizers.
Basal fertilizer: Organic fertilizer is used as a base fertilizer for one-time application. In addition, 6 kg of urea, 13 to 17 kg of ammonium phosphate, 7 to 8 kg of potassium sulfate, and 0.5 kg of borax are applied per mu.
Top dressing: 10 to 11 kg of urea, 5 to 6 kg of potassium sulfate per mu, 1 to 15 kg of urea, 6 to 8 kg of potassium sulfate, 10 to 11 kg of urea in the middle of the bulb formation Potassium 5 to 6 kg.
Fertilizers outside the roots: Boron deficiency can be used to spray 0.1% to 0.2% borax solution in the early and middle stages of flower formation; magnesium deficiency can be sprayed 0.2% to 0.4% magnesium sulfate solution 1 Up to 2 times.
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