Fertilizer requirements: The early growth of radish has a slow absorption of N, P and K. It accelerates with the growth, and reaches the peak of the fleshy roots. The absorption of N, P, K is the highest. The absorption of N, P and K in radish varies greatly during different growth stages. Generally, the amount of nitrogen uptake during seedling stage is relatively large and the uptake of P and K is relatively small. In the early stage of root enlargement, the uptake of potassium by plants significantly increases, followed by Nitrogen and phosphorus are the peak period of nutrient absorption during the peak period of root enlargement. Therefore, ensuring adequate nutrition during this period is the key to high yield of radish.
Fertilization technology: The fertilization amount per mu for the whole growth period of radish is 3000~3500 kg of farmyard fertilizer (or 350~400 kg of commodity organic fertilizer), 14~16 kg of nitrogen fertilizer, 6~8 kg of phosphate fertilizer, and 9~11 kg of potassium fertilizer. Nitrogen and potassium fertilizers were used as base fertilizers and secondary fertilizers. Phosphate fertilizers were all used as base fertilizers, fertilizers and farmyard fertilizers (or commercial organic fertilizers). Basal fertilizer: Apply 3,000 to 3,500 kilograms of manure or 350 to 400 kilograms of commodity organic fertilizer, 5 to 6 kilograms of urea, 13 to 17 kilograms of diammonium phosphate, and 5 to 7 kilograms of potassium sulfate per acre. Top dressing: Mulberry urea 11~13 kg, 8~9 kg of potassium sulfate in the early stage of meat root expansion, 9~10 kg of urea and 5~6 kg of potassium sulfate in the middle of meat root expansion. Fertilizer outside the root: In the late growth stage, 0.3% of calcium nitrate and 0.2% boric acid can be used for spraying 2~3 times to prevent calcium deficiency and boron deficiency. At the same time, 0.2% potassium dihydrogen phosphate can be sprayed on the leaves to increase the yield and quality.
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