During the cultivation process, welsh onion is very important for soil cultivation, which can increase the length of scallion, prevent lodging and bending, and at the same time can greatly improve the taste and quality of scallion and enhance the value of scallion. Soil cultivation is an important measure to soften leaf sheaths, prevent lodging, and increase light blue yield and quality. The cultivating soil must be carried out during the formation of light blue, otherwise it will easily cause root and plant rot. The earth should be gradually thickened according to the age of the seedlings, but if the earth is unreasonable, it can cause the scallions to burn roots, scallions to bend and so on. Now we will introduce the following issues for scallions:
Point one: earth time. When the green onion grows to 30 centimeters, it can not be too early, otherwise it will cause slow growth of welsh onions and scallion bending; it should be done in the afternoon because the leaves are tender, otherwise it will easily cause damage to the leaves.
Point two: a reasonable top dressing. On the whole growth process of welsh onion, 3 times of earth is usually carried out. For the first time, it became a “small cultureâ€, and the thickness of soil was controlled at about 5 cm. After the scallion was grown to 30 cm in light blue, it could be balanced. For example, 15-15-15 compound fertilizer 25 kg with 150 kg soybean meal organic fertilizer. To promote deep roots and meet the growth needs of green onions. When welsh onion grows to 40 to 45 centimeters, secondary earthing is required. The thickness of earth is controlled at about 10 cm. The topdressing soils are mainly nitrogen and potash fertilizers, and 15-5-20 high nitrogen and high potassium types can be selected to promote the growth of pseudostem and leaves, and at the same time, 250 kg of soybean meal and organic fertilizer are used. The last time the soil is cultivated is about 20 days before harvest. In order to improve the quality and taste of light blue rice, the thickness of the soil is controlled at about 10 cm. At the same time, 50 kg of calcium nitrate can be applied. This dressing is not supplemented with nitrogen fertilizer, otherwise it will easily lead to light green onions. Poor taste.
Point three: earth method. Do not take too wide a width of earth. Take earth from the middle of the row. Do not take more than one-third of the row spacing. Do not make it too deep so as not to hurt the root. Earth should be tapped to prevent rain or water from falling down. Wet soil should not be used for dry and wet soils. We must keep the onion pseudo stems upright and do not over-deep the soil.
Point four: Earth should pay attention to the season, high temperature season can not be soil, or false stem buried in the soil too deep and perishable. Earthing times should not be excessive. Frequent earth-cultivation not only increases workload, but also inevitably hurts root-injured leaves and affects the growth and accumulation of green onions. Do not overdraw earth once, otherwise, if you bury the functional leaf itself, it is easy to cause leaf rot. Each time the soil is 3-4 cm in thickness, the soil will be cultured at the boundary between the leaf sheath and the leaf body, ie only the leaf sheath will be buried, and the leaf should not be buried.
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