Sweet potatoes, also known as sweet potatoes and hawthorn, are known by older people. It was one of the most important foods in the 1960s and 1970s that enabled people to overcome difficulties. After the reform and opening up, the proportion of sweet potato in peopleâ€™s daily diet structure is getting less and less. However, with the continuous improvement of peopleâ€™s living standards, the incidence of modern diseases such as obesity, hypertension, and digestive system cancer remains high, forcing us to They had to re-examine their dietary habits, so on the table of modern people, sweet potatoes, cornmeal, wild vegetables, etc. gradually increased. According to this change in consumption structure, professional technicians of the Wuqing District Agricultural Technology Extension Center in 2003 After introducing, testing and planting black sweet potatoes in the past, after more than three years of experimental research, not only the standardized cultivation techniques of black sweet potatoes have been summarized, but also the nutritional value of black sweet potatoes has been explored. In terms of ordinary sweet potatoes, it is rich in The dietary fiber can increase bowel movements, promote digestion, shorten the residence time of harmful substances in the intestine, prevent cancer, and at the same time can help people lose weight and delay aging; it also contains a mucoprotein with special functions that can inhibit arteries. Hardening and so on. Developed countries such as the United States and Japan regard sweet potatoes as "healthy foods" and "space foods." Black sweet potato not only has all the nutritional value of ordinary sweet potato, but more importantly it is a selenium-enriched agricultural product. The selenium content is more than 20 times that of common sweet potato. Selenium is an essential trace element for the human body and can improve the body's immunity. It is liver cancer, Gastrointestinal cancer, skin cancer and other powerful inhibitors.
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