Sweet potato, also known as sweet potato and millet, has round, oval or spindle-shaped roots. Originated in South America and the big and small Antilles, it is widely cultivated in tropical and subtropical areas all over the world, and also in most parts of China. Sweet potato likes light and has strong adaptability to drought, soil environment, developed root system and strong fertilizer absorption ability. According to the climatic environment in various parts of China, sweet potatoes are generally planted in April-May, and harvested in June at 5438+ 10.