Fertilization is a crucial aspect of corn cultivation, and proper application methods can significantly impact yield and plant health. First, the use of basal fertilizer plays a major role, typically accounting for 70% to 80% of the total fertilizer applied. Organic fertilizer forms the foundation of this approach, often combined with phosphate fertilizers. It is recommended to apply 2,500 to 5,000 kg of high-quality organic fertilizer per acre. If nitrogen-based fertilizers are used as a base, 13 to 20 kg of ammonium bicarbonate or 3 to 5 kg of urea per acre can be applied, but it's essential to incorporate them deeply into the soil to prevent nitrogen loss due to volatilization. In phosphorus-deficient soils, 30 to 40 kg of superphosphate per acre is advised. For potassium-deficient soils, applying 15 to 25 kg of potassium chloride per acre is generally sufficient. In zinc-deficient conditions, 1 to 2 kg of zinc sulfate per acre is recommended as a base fertilizer. When using nitrogen or phosphate fertilizers as a base, they should be concentrated or properly mixed to ensure even distribution.
Second, when selecting seed fertilizers, diammonium phosphate is considered a safer option compared to other nitrogen sources like urea. To avoid damaging seeds, these fertilizers should be placed at least 10 cm away from the planting area. A small amount of well-rotted farmyard manure can also be used as a seed fertilizer, with 300 to 500 kg of high-quality organic fertilizer recommended per acre. Urea can be applied at 3 to 5 kg per mu, or 7 to 10 kg of diammonium phosphate. The amount of top-dressing fertilizer should be adjusted based on how much basal fertilizer has already been applied—more basal fertilizer means less need for additional top-dressing, and vice versa.
Third, the timing, frequency, and quantity of top-dressing should be determined based on the growth stage of the corn, its nutrient requirements, and visual signs of development. Phosphorus and potassium fertilizers have long-lasting effects and can be applied as either a base or seedling fertilizer in one go. For example, applying 25 to 35 kg of superphosphate and 10 to 15 kg of potassium chloride per acre during the seedling stage can support early growth. Nitrogen top-dressing is often done in three stages: 30% of the total nitrogen is applied at the seedling stage to promote strong stalks, 50% is applied during the tasseling stage to support ear development, and 20% is added later to ensure adequate nutrition during grain filling. This method helps maximize yield by ensuring nutrients are available when the plant needs them most.
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There is no doubt that solar monitoring has brought great convenience to people. It saves a lot of manpower and material resources without having to stick to the post for 24 hours as before. Not to mention that the current surveillance cameras have the function of motion detection. As long as someone enters a certain range, it will automatically alarm and capture the scene. What is the function of the solar monitoring system?
1. Solar panel: The solar panel is an important part of the mobile phone software of the solar power generation system, and also a part of the practical value of the mobile phone software of the solar power generation system. Its function is to convert the professional ability of radioactive substances in natural light into electric energy, or send them to storage batteries, or promote load work.
2. Solar controller: The solar controller is used to control the operation of mobile phone software in all systems, and has the functions of overcharge protection and overcharge maintenance for the battery. In areas with large temperature difference, the qualified controller shall also have the function of temperature compensation. In the mobile phone software of the solar road lamp system, there must be light control switch and time control solar road lamp operation.
3. Battery: generally valve controlled maintenance free lead-acid battery. In the mobile phone software of small and medium-sized systems, in cold weather areas, a solar gel battery needs to be configured, which can be used at low temperatures, with high efficiency and is not vulnerable to major damage. Its function is to store the electric energy of the solar panel when the sun shines, and then release it under certain conditions.
4. Variable frequency power supply: split wave type and sine wave type. In order to provide power for 220VAC electrical products, it is necessary to convert the DC stabilized voltage power supply in the solar power generation system software into AC circuit energy, so DC AC variable frequency power supply is required.
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