Potassium fertilizer is generally used as base fertilizer and also used for foliar spraying, such as potassium dihydrogen phosphate. When making base fertilizer, it should be applied to acupoints, at the bottom of acupoints, covered with soil, and then covered with soil. It can also be applied to the holes of potato seeds. In the process of potato growth, adequate potassium fertilizer is not only very important for high yield, but also affects the quality of potato chips, such as texture, color, taste and storage resistance. Therefore, it is very important to use potassium fertilizer well for potato planting.

Plant ash contains a lot of potash fertilizer. Seed dressing with plant ash instead of talcum powder before sowing can provide sufficient potassium fertilizer in potato germination and seedling stage, promote root development and lay a good foundation for creeping potato expansion in the later stage. Before sowing potatoes in spring, sprinkle manure and potassium sulfate on the ground, and then dig deep into the soil. You can also use a rotary tiller to deep spin. Raking, grinding and leveling. Ridge planting with plastic film and film mulching. No auxiliary film can be planted in furrow sowing or hole sowing After emergence, topdressing nitrogen fertilizer according to soil moisture.

Potatoes are potassium-loving crops. It is best to apply base fertilizer, and topdressing under soil should be carried out before flowering, sooner rather than later. The basic elements (such as potassium) needed by potato in the whole growth period mainly depend on base fertilizer and other topdressing. When potato shows symptoms of potassium deficiency, the plant grows very slowly, or even does not grow at all, the stem nodes become shorter, the plants are clustered, the leaflets shrink, the leaves curl downward, the leaves are rough and the tips are short.

The full flowering period of potato is the symbol of tuber expansion period. Although the flowers are withered, the potato pieces are still growing slowly, and the starch content should be accumulated and deposited as soon as possible. Therefore, applying some potassium fertilizer after flowering still has a certain effect. When potassium fertilizer is sufficient, potatoes grow vigorously and have compact stems, which can reduce lodging, thicken leaves, delay leaf senescence, enhance the drought and cold resistance of potatoes and greatly improve the yield and quality of potatoes. When the chlorine concentration in the soil is lower than 100 mg/kg, potatoes grow healthily, showing different degrees of yield increase, and there is no adverse effect on tuber quality. So we should re-recognize the "chlorine avoidance" of potatoes.