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2. Top dressing. Onions are usually top dressing three or four times. For the first time in the first week after planting, Mushi 20% of the manure is about 800 kg, or about 10 kg of ammonium sulfate, and about 800 kg of water is poured. The second time in the spring, about 3 months, Mushi 30% of the manure of about 800 kilograms, or about 10 kilograms of ammonium sulfate, add about 800 kilograms of water, combined with pouring cultivator earth. The third time in early April, when onion began to expand, 50% of Mushi people had about 800 kg of excrement, about 10 kg of ammonium sulfate, about 5 kg of potassium sulfate, and about 800 kg of water, combined with cultivating and weeding. Phosphorus and potassium have a great influence on onion quality in fertilization, which can make seedlings grow robustly, bulbs are full, bright color, and have the effect of promoting premature maturity.
1. Base fertilizer. Onion basal manure generally applies about 1,000 kilograms of manure, or applies delayed-released phosphate fertilizer or superphosphate 30 kilograms, and potassium sulfate 15 kilograms. After blending the above-mentioned various fertilizers, the fertilizer is applied to the soil in combination with ploughing and soil preparation. The upper layer is then transplanted and planted.