New Black Sweet Potato Variety: Introduction to the American Ultra-Short-Vine Black Sweet Potato

1. Characteristics:

① Excellent appearance: The tubers are long and cylindrical, with a single tuber weighing 300-800 grams, and the largest around 1000 grams. It sets many tubers evenly, with 4-8 tubers per plant. The tuber surface is purple-black, glossy, and attractive.

② Excellent quality: Its nutrient content is significantly higher than other tuber crops. Its lysine, potassium, manganese, and zinc contents are 5-8 times higher than ordinary sweet potatoes, and in particular, its content of the anti-cancer substances iodine and selenium is more than 20 times higher than other sweet potatoes, ranking first among foods. For this reason, it is hailed in the United States as a "green health food."

③ Excellent eating quality: When cooked, it is sweet, fragrant, and palatable, with all of color, aroma, and taste. Because it combines the advantages of nutritional quality and eating quality, it is a superior health food for urban residents as well as hotels and restaurants.

2. Botanical characteristics: Strong sprouting ability, with many branches. The vines are 70-90 cm long. The top 3-4 leaves are purple, heart-shaped, and without lobes. The middle and lower leaves and stems are green, while the veins and leaf bases are purple. The skin is purple-black and smooth, and the flesh is purple-black. It sets tubers concentratedly. The anthocyanin content is 75 mg/100 g fresh weight, and the dry matter rate reaches 36.50%. At a density of 3500 plants/mu, the tuber-setting rate per plant is high. Spring sweet potatoes yield 2500-4000 kg per mu, and summer sweet potatoes yield 1500-3000 kg per mu. It is suitable for roasting, steaming, and boiling; when cooked, it has a rich fragrance, is dry and sweet, and is purple-black in color. The American black sweet potato does not grow excessively (does not run out of vigor) and sets tubers steadily, overcoming the problem of long vines, which more easily cause excessive growth and lead to rotting of the vines. Compared with the "Japanese Chuanshan Purple Black Sweet Potato," this variety has more advantages. The "Chuanshan Purple Black Sweet Potato" has vines 3-5 m long, does not set tubers easily, and is more prone to excessive growth, causing rotting of the vines. The American black sweet potato has just been introduced into our country, and its seed sources are scarce. Its quality, color, and vines are all especially excellent, with stable and high yield, unique quality, and rich nutrition. In every kilogram of sweet potato, it contains 23 grams of protein, 290 grams of sugar, 3 grams of fat, 6.80 grams of vitamin A, 80 mg of calcium, 200 mg of phosphorus, 4 mg of iron, 300 grams of vitamin C, 5 mg of niacin, and 300 mg of ascorbic acid, and it is also rich in carotene and nine amino acids. Its content is higher than that of rice, flour, corn, and sorghum, making it an ideal health food. It can help prevent and treat collagen diseases such as respiratory tract, digestive tract, and arthritis conditions, inhibit the occurrence of cancer, resist fatigue, prevent aging, and improve human immunity. It is the best food for staying slim and fit.