Potatoes are good potassium crops, but the application of heavier N and P fertilizers in potato cultivation results in a large consumption of potassium in the soil, a decline in soil potassium supply capacity, and a disproportionate supply of fertilizer, thus limiting the yield of potatoes. Different soil conditions, potash fertilizer varieties and fertilization periods have different effects on potato yield and quality. The results of the trial study showed that when the effective potassium content in the soil was lower than 100 mg/kg, the benefit of potassium application was significant, and the rate of increase in top-dressing potato with potassium fertilizer in the early stage of budding was the highest, and the starch content and the rate of large and medium tubers also increased. When planting potatoes, apply a certain amount of nitrogen and phosphorus fertilizers. After the application of acupuncture, cover the soil with 14 to 15 kilograms of acre per kilogram. Potassium sulfate is more effective than potassium chloride.
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