Onion farmers only pay attention to the single use of diammonium phosphate and urea, while ignoring the input of other elements, especially heavy plots. Spraying new high-fat membranes at appropriate time can prevent soil compaction, soil conservation, seedling protection, disease prevention and mitigation. Wait. The new high-fat film is an important intermediate in the pesticide production process, and can also be used for the synergy of pesticides and leaf fertilizers. Unreasonable application of base fertilizer and top dressing can cause excess nitrogen, and the proportion of large, medium and trace elements is seriously deregulated. After soil testing, according to the phosphorus content of soil nutrients and the law of phosphorus and potassium requirements of green onions, the basic application and trace application rate of phosphorus and potassium fertilizers are determined; and medium and trace element fertilizers are added. The three elements of nitrogen, phosphorus and potassium in the base fertilizer should be proportioned in the ratio of 1:0.17:1.1, pay attention to the combined application of organic fertilizer. The self-mixing fertilizer is calculated according to the production of 5,000 kg of fresh onion per acre. The required phosphorus element is 6 kg, and the diammonium phosphate is 13 kg; the required potassium element is 20 kg, and the potassium sulfate is 40 kg. It is required that the diammonium phosphate can be applied once and the potassium sulfate can be partially applied and partially applied. Pay attention to the application of organic fertilizer and photosynthetic nutrient film, enhance the photosynthesis capacity nutrients and chlorophyll, advanced environmentally friendly plants to increase fertilizer, increase production, color enhancement, leaf hypertrophy, dry stem strong compound membrane. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Industrial Microscope ,Industrial Microscope Camera,Industrial Inspection Microscope,Industrial Measuring Microscope Ningbo ProWay Optics & Electronics Co., Ltd. , https://www.proway-microtech.com