It has become a habit for vegetable farmers to apply chemical fertilizers in ditching and fertilization, but it is not suitable to use this method in hot seasons, because the temperature is higher, and the effect of a large amount of ammonia volatilization will be reduced when the fertilizer is applied. In particular, ammonium bicarbonate is more likely to cause ammonia poisoning in eggplants. The effect of using trenching or digging to bury is the best. The thickness of the buried soil after top dressing should be no less than 5 cm to reduce the volatilization of the active ingredients of the fertilizer.
Pay attention to the amount of nitrogen fertilizer required for eggplant, but in the hot season, "eat less and more meals". Urea application per mu should be controlled within 30 kg each time. Because of the high temperature season, the conversion rate of urea is relatively fast after it is applied to the soil. After the plants meet the needs, the excess part will be lost. Especially in sandy soil, the proportion of loss will be greater. The application rate of ammonium bicarbonate per mu should not exceed 40 kg. Excessive application rate will cause damage to eggplant leaves and fruits in addition to the loss of nutrients.
Reasonable collocation of eggplant. Although the nitrogen fertilizer requirement is the best, phosphorus and potassium fertilizers are also indispensable. It is not necessary to apply only nitrogen fertilizer every time when topdressing.
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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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