Proverbs of eating sweet potatoes for thousands of years
Sweet potato (Latin scientific name: sweet potato? Batata? (l) Lamarck alias: Ganchu, sweet potato, Zhu potato, etc. It belongs to Panicum of Convolvulaceae.
The underground part of sweet potato has round, oval or spindle-shaped tuberous roots. The shape and color of leaves often vary from variety to variety. Generally, it is broadly ovoid, with petioles of different lengths. The corolla is pink, white, lavender or purple, bell-shaped or funnel-shaped, with stamens and styles embedded, and the capsule is oval or oblate.
Sweet potato contains a lot of starch. Sunlight also accelerates the loss of water and the production of sugar. Originated in South America and Antilles, it is widely cultivated in tropical and subtropical areas all over the world.
It is generally believed that
The sweet potato was introduced into China in the 21st year of Wanli (1593). In the Ming Dynasty, Chen Zhenlong, a native of Changle, Fujian, and his son Chen Jinglun, who had been doing business in Luzon (Philippines) for many years, saw a local root crop called "sweet potato", which was "as big as a fist, with scarlet skin, crisp and juicy heart, edible both raw and cooked, high yield and barren tolerance".
Chen Zhenlong decided to introduce sweet potatoes to China when he thought of his hometown of Fujian, where there are many mountains and few fields, poor land and insufficient food. 1593, the Philippines was colonized by Spain and regarded sweet potato as an exotic product. After careful planning, Chen Zhenlong "twisted potato vines into a water rope" and smeared sludge on the rope surface. In the early summer of 1593.
Skillfully avoided the inspection at the colonial checkpoint. "You have to cross the sea." Sail for seven days and return to Xiamen, Fujian in late May of the lunar calendar. Sweet potato is called "sweet potato" because it comes from abroad. Chen's introduction of sweet potato is discussed in Xu Guangqi's Agricultural Records and Tan Qian's Miscellaneous Jujube.
After sweet potato was introduced into China, it showed the excellent characteristics of strong adaptability and no occupation of land, and its yield was high, "the yield per mu was dozens of stones, which was 20 times better than that of seed grain". Coupled with "moist and edible, or boiled or ground into powder, raw food such as pueraria lobata, cooked food such as honey, taste like water chestnut", it can quickly spread to the mainland.
At the beginning of the 17th century, serious floods occurred in the south of the Yangtze River, resulting in crop failure and displacement of hungry people. At that time, scientist Xu Guangqi was living in his home in Shanghai because of his father's death. He learned that the sweet potato planted in Fujian and other places is a good crop to save the famine, so he introduced it from Fujian to Shanghai and then to Jiangsu, and the harvest was good.