When the welsh onion enters the primeval period, it should be combined with irrigation for the first time dressing, and 10 kg of urea can be topdressed with potassium nitrate or potassium dihydrogen phosphate. When the green onion into the light blue formation period, can be chasing two fertilizers respectively, with quick-acting nitrogen fertilizer, with topdressing phosphorus, potash fertilizer.
Green onion cultivating soil is best carried out in the formation of light blue, otherwise it will easily lead to plant rot. When soil is grown, it should be gradually thickened according to the age of the seedlings. After the beginning of autumn, soil should be cultivated once every half a month, and a total of 3 to 4 times of soil should be cultivated. This is a key measure to increase the length of light blue rice. Ploughing should be carried out in the afternoon when the leaves are soft. Avoid bouncing in the morning when it is crisp and tender to prevent damage to the leaves. It is advisable to raise the height of the earth to prevent the growth of green onions. In general, the seedlings should be lighter. As the number of cultivating the soil increases, the soil is thicker and thicker. The thickness of each cultivating soil is appropriate to the exit of the last leaf, and the last time the soil is cultivated should generally be 15 cm above the ground. Must not be buried in the heart, so as not to affect the growth of green onions and cause root and plant rot.
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