How to apply fertilizer to plant green onions can produce high yield?

How to apply fertilizer to plant green onions can produce high yield? How much fertilizer does green onion need to apply per mu? Netizens who have experience in planting green onions are also invited to help introduce that green onions can prevent cancer, increase appetite, dilate blood vessels, lower cholesterol and strengthen yang and tonify yin, so they are welcomed by the majority of consumers, so the farming network has sorted out the fertilization methods for planting green onions. The following are listed in detail for netizens' reference. 1. Fertilizer requirement of green onions: generally speaking, green onions can reach 5000-6000kg / mu under the condition of high yield, so they need more nutrients. Under normal circumstances, for every 1000 kilograms of green onions, they need 2.7-3.3kg of pure nitrogen, 0.5-0.6kg of phosphorus pentoxide, 3.3-4.0kg of potassium oxide, and the absorption ratio of nitrogen, phosphorus and potassium is 1 ∶ 0.4 ∶ 1.3kg. It is very sensitive to potassium and nitrogen nutrition. Second, the fertilization principle of Welsh onions: if no or less potassium fertilizer is applied in planting Welsh onions, there will be a substantial decrease in soil available potassium content and a serious imbalance in the proportion of nitrogen, phosphorus and potassium, resulting in aggravation of diseases and insect pests, decrease in yield and deterioration of quality, and decline in economic benefits of planting Welsh onions. The application of potassium fertilizer to Welsh onion can promote the growth of Welsh onion and improve the ability of resistance to diseases and insect pests. Green onions lack potassium, the growth is slow, the plant is short, the green onion is short and the yield is low. Balanced fertilization of green onion can significantly increase the yield, increase the content of vitamin C and soluble sugar, reduce the content of harmful substances such as nitrate, and improve the internal and external quality of green onion. After years of experiments, the yield of Welsh onion increased by 22.3%-28.2%, the content of vitamin C increased by 7.20%-16.0%, the content of soluble sugar increased by 15.5% and 12.7%, and the content of nitrate decreased by 22.6% and 26.5%. The income per mu increased by 1690,2000 yuan, and the output-input ratio of potash fertilizer was as high as 72.42 and 40.67 ∶ 1. The balanced fertilization technology of green onions with supplementary potassium fertilizer as the center has an area of more than 35000 mu, with an average yield increase of about 20%. Third, green onion fertilization suggestion: green onion balanced fertilization technology is simple and easy to apply fertilizer: on the basis of applying organic fertilizer, the suitable amount of fertilizer application is 20 kg of pure nitrogen and 6 ~ 8 kg of phosphorus pentoxide per mu. Potassium oxide 20kg 30kg, equivalent to urea 40kg 55kg, ordinary calcium superphosphate (available phosphorus content 12%) 50kg 65kg Potassium chloride (available potassium content 60%) 35~50kg. For example, when the soil fertility of Welsh onion is low and lack of organic fertilizer, a higher amount of fertilizer can be considered; on the contrary, when the soil fertility is high and the soil fertility foundation is good, the amount of fertilizer application can be reduced appropriately. Fourth, the fertilization method of green onions: 1. Before sowing green onions, 20% of nitrogen and potassium fertilizer and all phosphate fertilizer are mixed and applied as base fertilizer, and turned deeply into the soil. 2. The remaining 80% nitrogen and potassium fertilizer should be used as topdressing, which will be applied twice in mid-September and mid-late October. Pay attention to Zhangqiu Welsh Onion planting Video