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When was Zhancheng rice introduced?
Zhancheng rice is a high-yield, early-maturing and drought-tolerant rice variety produced in Indochina Peninsula. It was introduced into China in Song Dynasty and spread rapidly in Jiangnan. Zhancheng rice is named after its origin in Zhancheng, south-central Vietnam. Zhancheng Rice, also known as Zaohe or Zhanhe, is an early indica rice, which originated in south-central Vietnam and was first introduced to Fujian in the early Northern Song Dynasty. According to China ancient books, Zhancheng rice has many characteristics. The first is "drought tolerance". Second, it has strong adaptability and is "born without chaos". Third, the growth period is short, and it only takes 50 days from planting to harvesting.

Zhancheng rice is an excellent rice variety in Song Dynasty. Zhancheng people cultivated an excellent rice variety, which was introduced to Fujian in the early Northern Song Dynasty. 10 1 1 year, due to the drought and lack of water in Jianghuai and Zhejiang areas, Song Zhenzong sent messengers to Fujian to occupy urban rice, up to 30,000 hectares, and promoted it in the Yangtze River, Huaihe River and Zhejiang areas respectively, and ordered it to be transshipped "... rice is longer than China, with no awn, small grain difference and chaos". Zhancheng Rice in Song Dynasty was a typical exotic crop variety in ancient China. It was introduced into Fujian in the late Tang Dynasty and the Five Dynasties, and then spread northward under the leadership of the Song government. Its outstanding excellent quality makes it the dominant grain crop in the Yangtze River valley, and with the different geographical environment, many new varieties have evolved one after another. Therefore, Zhancheng rice has a far-reaching impact on the rice farming system in the Yangtze River basin. The introduction of Zhancheng rice is undoubtedly the result of the development of foreign trade. The information about Zhancheng rice is most widely recorded in Shi Shi Shi Shi Foo, the most detailed in Shi Shi Shi Shi Foo, and the most specific in Three Mountains in Xi Chun (before and after Zhancheng). Zhancheng rice not only refers to the rice planted in Zhancheng country, but also refers to the common rice varieties in Indochina countries. Took up all the grain in the city, led by rice. The article "The Kingdom of Real Wax" in this volume also says: "The soil is fertile and the field is fertile, and the field is my field. If you farm as far as you can see, the rice is flat. " Annan, Zhancheng (also known as Lin Yi and Guo Huan) and Zhenla in Indochina Peninsula are rich in rice. Because of extensive agriculture and no irrigation facilities, rice can grow naturally. This is similar to the situation in Guangxi. Until the Southern Song Dynasty, the cultivation method of upland rice outside the ridge was like this. The article "Idle Farmers" in the third volume of "Answering the Generation Outside the Ridge" said: "It is no longer easy to plow just by taking broken pieces, but to plant them in the fields without moving seedlings. After planting, drought does not find water, and waterlogging does not drain. There is neither dung nor soil, and it must be in the sky. " The characteristics of drought and waterlogging tolerance of Zhancheng rice may be formed under this specific natural environment and extensive farming methods. Although Zhancheng Rice is famous as Zhancheng Rice, it is widely planted in Guangxi, Annan, Zhancheng, Zhenlai and other countries.

The introduction of Zhancheng rice into Fujian was related to the return of Fujian businessmen to Zhancheng and Annan. Fujian businessmen, especially Quanzhou businessmen, have a tradition of doing business in Hainan Island, Annan and Zhancheng. Because of taking villages to Jiaozhou (Annan, Jiaotoe), occupying cities, and zhenla trade, there will be migration problems. Zhancheng rice was probably brought to Quanzhou by Jia vendors and settlers (early overseas Chinese). Zhancheng Rice was introduced to Fujian from the Five Dynasties to the early Northern Song Dynasty, and it has a history of hundreds of years in northern Song Zhenzong. Therefore, Dazhong Xiangfu can collect 30,000 seeds (Zhancheng Rice) from Fujian in five years. There is no doubt that the introduction of Zhancheng rice is inseparable from coastal foreign trade.