What are the uses of potash fertilizer for growing sweet potatoes?

What are the uses of potash fertilizer for growing sweet potatoes? How to use potash fertilizer to grow sweet potatoes? Ask netizens to help introduce the high demand for potash fertilizer of sweet potato, which is also a magic weapon to increase the yield of sweet potato. The farming network has sorted out the use of potash fertilizer in the planting of sweet potato, which is listed below for netizens' reference. Method 1. Sufficient amount of base fertilizer: adequate application of potassium fertilizer is the basis for high yield of sweet potato. Therefore, it is necessary to give priority to high-quality organic fertilizer. Because of the poor water and fertilizer conservation capacity of sandy soil, semi-rotten organic fertilizer should be used as base fertilizer, while clayey soil should be treated with rotten organic fertilizer. Combined with ploughing and ridging, 100-150kg of plant ash per mu or 3500-5000 kg of high-quality farm manure containing more potassium should be applied at different levels. When applying plant ash, be careful not to mix it with ammonium nitrogen fertilizer or human feces and urine, so as to avoid the loss of nitrogen volatilization. In addition, sweet potato is a chlorine taboo crop, potassium chloride can not be applied. Potassium leaching solution of sweet potato seed / vine before planting: potassium leaching of sweet potato vine can improve survival and promote early development of plants. The specific method is: 0.5 kg of potassium sulfate and 25 kg of water are fully stirred to form a 2% concentration, the cut sweet potato rattan seedlings are soaked in potassium solution, and the top leaves should be above the water surface. Generally soak for 1 hour and then take out a little to dry and then plant. Topdressing potash fertilizer in time: about 40 days after planting, 10 kg potassium sulfate per mu was deeply applied at 7-10 cm at the base of potato seedlings, and then covered with soil to promote the formation and expansion of tuber roots. When the potato vine grows to about 1 meter, in the morning when there is no wind and dew, about 50 kilograms of plant ash is used per mu and directly spread on the leaf surface, which can prevent the potato vine from growing and promote the expansion of potato blocks. In the potato block expansion period, if the soil is moist, more rain, rattan, leaves turn yellow, can apply more plant ash. Foliar spraying potassium solution: in the late growth stage of sweet potato, foliar spraying potassium fertilizer solution can obviously increase yield. Generally, 40-50 days before harvest, 1% potassium sulfate solution or 0.2% potassium dihydrogen phosphate solution or 5% plant ash leaching solution (5 kg of plant ash plus 100 kg water for 24 hours) is sprayed every 7 days or so, a total of 2-3 times, each time 75-100 kg potassium fertilizer solution per mu. It is generally appropriate to spray in the evening to facilitate leaf absorption and improve fertilizer efficiency. Click to get more sweet potato planting techniques click to get more vegetable planting techniques