1. Cultivate the soil in time. The growth of green onions is accelerated, and the soil should be cultivated many times in order to make the onions grow fast and strong. It can be divided into 4-5 times of soil, and the height of the soil can not be buried as the principle. The special tiller for applying the onion is fast in operation and high in efficiency, which can reduce the production cost. 2, watering and fertilizing. In autumn, the growth of plants is accelerated. The "grass-leaching fertilizer" should be applied, and 1500-2000 kg of decomposed farmyard manure and 25 kg of super-calcium phosphate should be applied per mu. Before and after the autumn equinox is the key period for the formation of green onion. It should be combined with watering to apply “graining fertilizer†twice, each time applying 15-20 kg of urea per acre and 10-15 kg of potassium sulfate, sprinkling between rows and then pouring water. Generally, the land is watered once every 10 days. Watering keeps the soil on the ridge dry, and the soil in the ditch is wet. The soil is prevented from being too dry and too wet, causing disease and affecting the yield of green onion. 3, disease prevention and control of insects. The main pests of the onion are downy mildew, black mold, purple spot, leaf miner, cockroach, root lice and so on. The chlorpyrifos was applied to the roots before and after the evening, and the interval was two weeks. The dosage per acre was 1 kg. Continuous rooting twice could effectively control underground pests such as alfalfa and root mites. Spraying beta-cypermethrin 1000 times solution can control pests such as leaf moths. Spraying 77% of silver fali can control underground pests such as cockroaches and root lice. Spraying beta-cypermethrin 1000 times solution can control pests such as leaf moths. Spraying 77% of silver-Fly to control downy mildew is effective. Spraying 75% of chlorothalonil and 58% of metalaxyl manganese zinc can prevent and control diseases such as purple spot and black mold. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Dental Light Curing Lamp,Dental Light Cure,Dental Led Curing Light,Dental Optical Fiber Guide Stick Foshan Ja Suo Medical Device Co., LTD , https://www.fjoralinstrument.com