Potatoes have osmo-potassium properties and have a large demand for potassium. In the cultivation, more attention should be paid to the application of potassium fertilizers. For every 1000 kilograms of potato tubers produced, 5 kg of pure nitrogen, 2 kg of phosphorus pentachloride, and 10.6 kg of potassium chloride should be absorbed from the soil. The ratio of nitrogen, phosphorus and potassium absorption is 1:0.4:2.1. When potassium is added to the growth of the potato, it can increase the turgor pressure of the crop cells, make the cells rich in elasticity, and can regulate the opening or closing of the leaf cells, which is beneficial for the crops to absorb more carbon dioxide to make carbohydrates and form starch and sugar. Class II; can promote root development, absorb more water, ease water evaporation, improve crop drought resistance; 3 can promote the development of stalk cellulose, improve the support ability of stems, and enhance the ability of crop resistance to lodging and disease resistance It is conducive to the organic nutrient (starch) in the crops to the storage organs (underground rhizomes, fruits) to accelerate the expansion of roots and pods, thereby increasing yield and improving quality. The application of potash fertilizer in potato production is generally based on base fertilizer and top dressing. The allocation of nitrogen, phosphorus and potassium fertilizers, 50% nitrogen fertilizer in base fertilizer, all phosphate fertilizers and most of potassium fertilizers. Fertilizer basal fertilizer can choose the concentration of general-purpose compound fertilizer can also be used with single fertilizer. For top-dressing, 50% of nitrogen and a small portion of potassium can be used with urea, ammonium nitrate and potassium sulfate. At the time of application, the period with the greatest amount of potassium should be seized. The first is the seedling period. Each acre can apply 3 to 5 kilograms of potassium chloride or potassium sulfate or plant ash (including 7.5% of available potassium) 25 to 30 kilograms as the base fertilizer. When the soil is evenly distributed in the site preparation, soil and fertilizer are mixed. Potash fertilizer can also be used as a seedling fertilizer, with 2 to 3 kilograms of potash fertilizer applied per acre or on a hole. The depth requirement is about 10 to 15 centimeters. After fertilization, water is poured and the soil is covered. The second is during tuber formation. The same amount of potash fertilizer as above can be used per acre. After the potato block enlarges or the fruit canopy goes down, applying cracking fertilizer and potato fertilizer can effectively accelerate the organic nutrients of the stem and leaf to percolate into the tuber. In the late stage of potato growth, 1% potassium sulfate or 0.3% potassium dihydrogen phosphate or 5% plant grey water (after 24 hours soaking the supernatant or filtrate) may be sprayed 1 or 2 times (interval 7) (10 days), it can reduce leaf temperature, facilitate drought, eliminate pests (combined with pest control), and the effect is very significant. It should be noted that the topdressing time should not be too early, generally grasping the expansion period of potato chips and then proceeding. Comparing fertilizers too early, especially after chasing large amounts of nitrogen fertilizers, can cause prosperous growth on the ground and small potato chips in the ground. Potassium chloride and potassium sulfate are all physiological acidic fertilizers. Long-term application should prevent soil acidification and can be applied together with appropriate amounts of lime. Potassium chloride should not be used in saline soils. Mortuary Refrigerator Mortuary Refrigerator Medton Medical , https://www.medtonmedical.com