Purple sweet potato is rich in dietary fiber, starch, vitamins and trace elements (selenium, iron, calcium, potassium, etc. ), anthocyanin, glycoprotein, carotene, dehydroepiandrosterone and other functional factors, with antioxidant, anti-tumor, enhancing memory, preventing hypertension, repairing myocardium, relieving liver dysfunction, enhancing immunity and other functions.
Besides anthocyanin, purple sweet potato also contains many active ingredients such as β-carotene, dehydroepiandrosterone (DHEA), sugar egg white, dietary fiber, polyphenols and so on. It is reported that β -carotene in purple sweet potato can reduce human active oxygen and eliminate free radicals, and has physiological effects such as cancer prevention, anti-tumor and immunity improvement. In addition, β -carotene also has the functions of sweating and beauty.
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Characteristics of purple sweet potato varieties:
1, with superior quality and tender meat, is an excellent fresh and healthy sweet potato variety. Can also be used for extracting natural anthocyanins; Beautiful appearance, purple-black skin color and purple flesh color. The potato shape is long and spindle-shaped, and the potato skin is smooth and bright, with good commodity. The commodity rate is over 90% and the drying rate is about 33%.
2. The vines are short, with many branches and strong growth potential on the ground. The leaves of purple sweet potato are green and the stems are purple. The petiole base is about 1cm, with 5-6 branches, and the length is only about 1.2- 1.5m, which is convenient for field production management.
3. The yield of fresh potato is high, and the yield of concentrated potato is about 2500kg per 667 ㎡. If properly managed, the yield of summer potato can reach about 2000 kg per 667 ㎡.
4, precocious. It can be divided into two seasons, and the potato pieces swell early. If the film is covered in early spring, it can be listed from the end of July to the beginning of August.
5. Strong adaptability and good disease resistance. High resistance to root rot of sweet potato, more resistance to stem nematode disease, barren and drought tolerance, suitable for large-scale planting.
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