First, winter fertilizer application categories:
1, to give full use of decomposing organic fertilizer, general master organic fertilizer should account for 60-80% of the total amount of fertilizer, each adult tree maturity of the pig cattle pen manure 50 to 100 kg, maturity turf soil 50 to 100 kg.
2ã€Appropriately mix NPK fertilizers, each adult tree, apply organic fertilizer such as crop straw fertilizer, garbage, pond mud, etc. At the same time, apply 1.5 tons of cooked soybean cake, 1.5 kg of orange cake, 1.5 kg of phosphate fertilizer and 0.5 kg of urea. Lime 1.5 to 2 kg.
3, according to local conditions applied micro-fertilizer, according to the soil structure, the degree of fat thinning and fertilization environment, supplement the citrus necessary for a variety of trace element fertilizer. The orange orchards of red and yellow loam are all acidic, and the contents of available elements such as zinc, magnesium, manganese, and boron are low. The limestone purple soil and the coastal saline-alkali soil citrus orchard have low effective iron, zinc, and manganese; Excessive application of nitrogen fertilizer can also cause the lack of elements such as magnesium and zinc. Therefore, for the different conditions of the orange orchard, it should be applied symptomatically to supplement the deficiency of trace elements.
Second, fertilization method:
1, radial fertilization: According to the size of the crown, along the direction of horizontal root growth in the direction of horizontal root growth 4 to 6 of the esophageal, ditch from the stem near the shallower, to the crown projection at the deeper. This method has a wide distribution of fertilizers, and can be replaced every year fertilization sites, expand the fertilization surface, promote root absorption, especially suitable for adult citrus garden.
2. Excavate an orphan or ring deep trench along the canopy. The depth of the trench is about 50 cm. The width of the trench depends on the amount of fertilizer. The surface soil and subsoil should be stacked separately when digging trenches. The decomposed organic fertilizer or trace fertilizer is applied to the lower layer, and the nitrogen fertilizer is placed on the upper layer. In the ditch, first fill in more fertile topsoil and fill the subsoil with the surface.
Third, the winter fertilizer application time:
Should be completed in mid-December, after the advent of ice application, it is best to use 0.4% urea plus 0.3% potassium dihydrogen phosphate and other two extra-root fertilizer, better results.
How to choose a solar Camera?
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.
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