Chinese cabbage has a long growth period, high yield, and a large demand for nutrients. The absorption of potassium is the highest, followed by nitrogen, calcium, phosphorus, and magnesium.
Need fertilizer characteristics:
Chinese cabbage has a long growth period, high yield, and a large demand for nutrients. The absorption of potassium is the highest, followed by nitrogen, calcium, phosphorus, and magnesium. The total requirement fertilizer is characterized by less nutrient absorption during the seedling stage, a significant increase in the rosette period, and the absorption of nutrients at the heart-packing stage. Adequate nitrogen nutrition is particularly important for promoting the formation of hypertrophic green leaves and enhancing photosynthetic efficiency. If the supply of phosphorus and potassium is insufficient in the later period, it is often difficult to make the ball.
Fertilization technology:
The fertilization amount per mu in the whole growing period under medium fertility level is 2000-2500 kg (or 300-350 kg organic fertilizer), 13-16 kg nitrogen fertilizer, 5-8 kg phosphate fertilizer, 10-12 kg potassium fertilizer, and nitrogen and potassium fertilizer. Sub-basal fertilizer and secondary fertilizer, phosphate fertilizer for all base fertilizer, fertilizer and farmyard fertilizer (or commercial organic fertilizer) mixed application.
Basal fertilizer: 2000 to 2500 kg of farmyard fertilizer or 300 to 350 kg of commodity organic fertilizer, 4 to 5 kg of urea, 11 to 17 kg of diammonium phosphate, 6 to 7 kg of potassium sulfate, and 20 kg of calcium nitrate.
Dressing: Mushi urea 10 to 12 kg in the lotus stage, 7 to 9 kg of potassium sulfate; Mushi urea 10 to 12 kg in the early stage of the core, potassium sulfate 7 to 9 kg.
Fertilizers outside the root: spraying 0.3% calcium chloride solution or 0.25% to 0.50% calcium nitrate solution during the growth period can reduce the incidence of dry heartburn. Spraying 0.5% to 1.0% urea or 0.2% potassium dihydrogen phosphate solution at the beginning of the ball can improve the commercial value of Chinese cabbage.
Meltblown Cloth KN95 Face Mask
Kn95 Protective 3D Mask,Kn95 5 Layers Respirator,Meltblown Cloth Kn95 Face Mask,Kn95 5 Layers Fold Flat Face Mask
Jiangmen anjian biotechnology co. LTD , https://www.jmanjianmask.com