Sweet potato, also known as sweet potato, sweet potato and sweet potato, is an annual plant of convolvulaceae. People from different regions are called sweet potatoes, Shanghainese Tianjin people are called sweet potatoes, Shandong people are called sweet potatoes, Sunan people are called sweet potatoes, Shaanxi people are called sweet potatoes, Sichuan Guizhou people are called sweet potatoes, Beijing people are called sweet potatoes, Jiangxi people are called sweet potatoes, and Fujian people are called Hebei yam or red yam. People in different parts of the same area have different names for it. For example, although most areas in Shandong are called sweet potatoes, the locals near Zaozhuang and Jining in southern Shandong are used to calling them "taro", while the real taro is called "taro".

J.B. Edmund and others believe that sweet potato originated in Mexico and tropical America, from Colombia, Ecuador to Peru. A.von Humboldt quoted Gomorrah as saying: When Columbus visited the Queen of Spain for the first time, he presented the sweet potato brought back from the New World to the Queen. /kloc-At the beginning of the 6th century, sweet potatoes were widely planted in Spain. Spanish sailors brought sweet potatoes to Manila and Moluccas in the Philippines, and then spread them all over Asia. Sweet potato was introduced into China through various channels at the end of 16, and it was recorded in Shu Min, Agricultural Administration Complete Book in Ming Dynasty, Zheng Minquan Book in Qing Dynasty and Fuzhou Official Records. Chen Shiyuan's Biography of Golden Potato in Qing Dynasty quoted Records of Minhou: "According to sweet potato, it was planted by overseas Luzon. During the Wanli period of the Ming Dynasty, Marco Long, a Fujian native, traded his land to get rattan seedlings and planted them in China. It is worthy of drought and flood protection in Fujian. When Jin Taishou ordered Longzi to try planting, he gained a lot and could shoot half a grain. It's planted everywhere. " He also said: "It is called sweet potato because it comes from the countryside. It is planted in Gong Jin, so it is also called golden potato. " It is also reported that Chen Zhenlong's sixth Sun Zhenyuan and his son Chen Yun spread sweet potatoes in Yinzhou (Ningbo, Zhejiang), Jiaozhou, Qingzhou (Qingdao, Yidu, Shandong) and Yuzhou (Zhuxian Town, Henan) successively, and gradually spread all over Zhejiang in about 20 years after Qingganlong. The above historical facts prove that the sweet potato line was introduced into China, Fujian and Guangdong from Nanyang at the end of 16, and then spread to the Yangtze River, Yellow River Basin and Taiwan Province Province. At present, China's sweet potato planting area and total output rank first in the world.

Nutritional value of sweet potato

Sweet potato contains dietary fiber, carotene, vitamins A, B, C, E, potassium, iron, copper, selenium, calcium and so on. With high nutritional value, it is the champion of "Top Ten Best Vegetables" selected by the World Health Organization.

Edible value of sweet potato

1. Anticancer

Effectively inhibit the occurrence of colon cancer and breast cancer.

Relieve constipation and lose weight

Eating sweet potatoes can effectively prevent sugar from turning into fat, which is conducive to weight loss and bodybuilding. Sweet potato contains a lot of dietary fiber, which cannot be digested and absorbed in the intestine. It can stimulate intestinal tract, enhance peristalsis, relieve constipation and detoxify, especially for senile constipation.

3. Improve immunity

Sweet potato leaves have health care functions such as improving immunity, stopping bleeding, lowering blood sugar, detoxicating, and preventing and treating night blindness.

4. Anti-aging

Inhibit the production of melanin and prevent the appearance of freckles and senile plaques. Red can also inhibit skin aging, maintain skin elasticity and slow down the aging process of the body.

Tips for purchasing sweet potatoes

Smooth and slender: smooth and slender surface is preferred;

No black spots: Black spots taste bad.

Don't buy sweet potatoes with uneven surface, dark spots and sprouting in 800.jpg. Sweet potato has two skin colors: yellow skin and red skin, and red skin tastes sweeter.

Storage skills of sweet potato

1. It is not suitable to be put with potatoes, both of which are taboo. Either the sweet potato is hard-hearted or the potato sprouts.

2. Keep it dry and don't put it in a plastic bag.

Cooking skills of sweet potato

Although sweet potato is good, it contains large starch particles, and its gasification enzyme is easy to stimulate the secretion of gastric juice and produce carbon dioxide, which will cause abdominal distension, burping and acid water spitting. So you can soak the cut sweet potatoes in salt water for 10 minutes and then cook them!

Edible taboo of sweet potato

1. Sweet potato contains an oxidase, which easily produces a large amount of carbon dioxide gas in human gastrointestinal tract. Eating too much sweet potato will make people bloat, burp and fart. Sweet potato has a high sugar content. Eating too much will stimulate gastric acid secretion and make people feel heartburn. Because the stomach is stimulated by excessive gastric acid, the contraction is strengthened, and the gastric acid can flow back to the feeding tube, causing acid and water vomiting. When eating sweet potatoes, it is best to match a little pickles, which can effectively inhibit stomach acid.

2. avoid eating raw. Sweet potatoes must be steamed before eating, because the starch particles in sweet potatoes are not destroyed by high temperature and are difficult to digest.

3. avoid eating sweet potatoes alone, and cooperate with other grains. If eaten alone, because of the low content of protein, it will lead to unbalanced nutrient intake. Therefore, it is actually more scientific to cut sweet potatoes into pieces and cook them with rice. Therefore, it is precisely because sweet potatoes contain low calories and are quite full. Whether it is a staple food or a non-staple food, it is a good diet food.

4. Sweet potato has a lot of sugar, which can't be absorbed by the body for a while, and the rest is easy to ferment in the intestine, making the abdomen uncomfortable. Chinese medicine believes that people with dampness blocking the spleen and stomach, qi stagnation and blood stasis should be careful to eat sweet potatoes.

Edible suggestion of sweet potato

1. Rinse with clear water, dry the surface moisture, and steam or bake directly; Used for cooking or making snacks, removing both ends and sweet potato skin;

2. It can be cut into hob blocks for porridge, soup and wire drawing; Used to make French fries and chips can be cut into strips and thin slices; It can also be cut into pieces, steamed and pressed into mud to eat.

Sweet potato cutting method 1.jpg purple potato cutting method 0.jpg stew can be paired with ribs, corn, longan and so on; Mashed sweet potatoes can be used to make sweet potato cakes, glutinous rice balls, cakes, biscuits and so on. Peeled sweet potatoes are easy to change color if they are not eaten immediately; Soak in clear water, sweet potato will not be oxidized and discolored.