The best time for apple tree to apply base fertilizer is to apply base fertilizer before germination in spring, and the fertilizer effect is slow. It has little effect on flowering fruit setting and new shoots in spring, but it will lead to excessive growth of tree body in the later stage. Flower bud differentiation and fruit development. It is recommended to apply less base fertilizer as much as possible, and apply more foliar fertilizer. At the same time, it can be combined with spring irrigation and topdressing fertilizer, with nitrogen and phosphorus fertilizer as the main, with appropriate amount of potassium fertilizer. In order to promote flowering and fruit setting, the tree should be applied with nitrogen fertilizer or foliar spray fertilizer from early March to early April. The flowering period can be sprayed with 2% ammonium sulfate, 0.3% potassium dihydrogen phosphate or 0.2% borax solution. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
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1. Select a low-power controller. The controller will work 24 hours a day. If its power consumption is large, it will consume part of the power. A good choice is a controller that consumes less than 1 mA.
2. Select a controller with high charging efficiency. The controller of the MCT charging mode can automatically track the high current of the panel. Especially in winter or periods of insufficient light, the efficiency of MCT charging mode is about 20% higher than other charging modes.
3. Select the controller for bidirectional power regulation. Controllers with power regulation have been widely promoted. When there are few pedestrians at night, one-way or two-way lighting can be automatically turned off to save electricity. It can also adjust the power of the LED lights.
In addition to the above power-saving functions, attention should also be paid to the protection functions of the controller for components such as batteries. In addition, when setting the under-voltage protection value of the controller, try to adjust the under-voltage protection value to ≥ to prevent the battery from over-discharging.