The basic method of potassium application: Chinese cabbage produces more than 10,000 kilograms, requires 300 to 500 kilograms of refined organic manure, 300 kilograms of dried chicken manure, and 3 manure from manure, and applies compound fertilizer (NPK content is 35 More than %), such as Sacred-rich potassium sulfate compound fertilizer with 30 to 40 kg; the above two kinds of fertilizer can be mixed and applied. Nitrogen fertilizer (46% of urea, 15 kg), phosphate fertilizer (14% of calcium superphosphate, 30 kg), and potassium fertilizer (50% of potassium sulfate, 12 kg) were used as compound fertilizer without compound fertilizer. It is best to concentrate on ditching, ridge up with soil, and sow cabbage seeds on ridges. Topdressing: Chinese cabbage needs more than 60% of the total amount of fertilizer during the entire growth period. In addition to topdressing nitrogen fertilizer (urea 20~25kg), another 5~7kg of potassium sulfate is recovered during this period. , Application of trenches between ridges and soil watering. Foliar spraying: 0.2% potassium dihydrogen phosphate can be sprayed from rosette stage to ball stage, spraying once every 7-10 days, spraying 3 times in total, spraying in the morning, evening or cloudy all day Shi.
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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.
Cabbage increase production of potassium fertilizer
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