As the saying goes: "A nest of sweet potatoes has a handful of ash, and the sweet potatoes form a big pile." It is also said: "To make tiles, you rely on the blanks, and sweet potatoes rely on ashes." When we were young, we planted sweet potatoes and placed the sweet potato seedlings. , some manure water will be poured on it, then a handful of plant ash mixed with chicken manure will be sprinkled, and finally a little urea will be added. These base fertilizers are enough. The sweet potatoes and sweet potato seedlings grown are very good. The largest sweet potato I have ever seen weighed more than ten kilograms. Plant ash is an alkaline fertilizer and is rich in potassium. When cutting sweet potatoes, put a handful of plant ash in the dug hole, which can improve the soil, make the soil loose and breathable, prevent diseases and insect pests from biting the roots of sweet potatoes, and supplement potassium to the sweet potatoes. Elements, supplement nutrients, improve the resistance of sweet potatoes, make sweet potatoes expand quickly, and increase yields. Since sweet potatoes have a high demand for potassium fertilizer, potassium dihydrogen phosphate or water-soluble potassium fertilizer can be sprayed in a timely manner according to different growth conditions.

Because plant ash not only contains high potassium, but also has sterilization properties. When we planted sweet potatoes in the past, we planted the sweet potatoes first. When the sweet potato seedlings became viable, we sprinkled a handful of plant ash around each sweet potato seedling. Then the sweet potato seedlings are sealed into mounds, so as to increase the yield of sweet potatoes. It also explains the importance of applying base fertilizer to sweet potatoes.

Appropriate amount of nitrogen fertilizer should be applied during the growth period of sweet potatoes to promote the growth of canes. After the canes grow to 1 meter and side vines grow on the main vines, the application of nitrogen fertilizers should be stopped and phosphorus and potassium fertilizers should be applied instead. Potassium fertilizer is the main fertilizer. When the weather is fine, a large amount of hay ash can be spread on the box surface, combined with cultivating and loosening the soil, and plowing it into the soil layer to increase the potassium content in the soil, promote the expansion of sweet potato stems, and the deposition of starch and sugar.

Sweet potatoes are potassium-loving crops, so you should apply enough potassium fertilizer when planting. I would also like to remind all sweet potato growers that sweet potatoes are a chlorine-resistant crop and it is best not to apply potassium chloride. Potassium fertilizer is not only a nutrient, but also can regulate the absorption and distribution of nitrogen and phosphorus in crops. It also has the functions of resisting drought, waterlogging, cold and disease, enhancing immunity and stress resistance, and improving crop yield and quality. Therefore, potassium fertilizer is also called a quality fertilizer. .