Welsh onion is a kind of fat vegetables. For a long time, many vegetable farmers are accustomed to open the trenches for the one-time dressing of green onions. This is unscientific. Because it is not only easy to cut off the roots of green onions, but also due to over-concentration of fertilization and burn young roots of green onions, resulting in the phenomenon of dry tip and dead leaves, affect the quality of green onions, reduce production, so open the trenches to ensure No way. The correct fertilization method should follow the principle of “eat less and more meals†and adopt the method of soil fertility, from scallion planting to harvesting for 3 to 4 times, to prevent deferment of late growth of green onions. Apply 30 yuan compound fertilizer per acre, 20 to 30 kg, or 10 to 15 kg each of urea and potassium sulfate. According to the scallion growth period, each fertilizer should be slightly more than the amount of topdressing fertilizer last time; Apply on the surface of the green onion roots, and then cover the soil fertilizer, reduce the loss of fertilizer volatilization, promote softening and elongation of light blue, enhance wind resistance. Two days after fertilization, water must be poured to dissolve the fertilizer in the soil and quickly decompose, promoting the growth and development of Welsh onion. Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.bodybuildingoil.com