China has a long history of planting rice. There was a record of "five grains" sowing in Shennong era in the 27th century BC, and rice was listed as one of the five grains. Rice planting techniques, including paddy field and transplanting, were invented in China. Legend has it that Shennong taught people how to grow rice.

Rice is native to tropical low latitudes, and can only blossom and bear fruit under short sunshine conditions, and can only be planted once a year. Since the emergence of early rice varieties that are not sensitive to short sunshine, the rice planting range has gradually advanced to the Yellow River basin with long sunshine in summer.

In the south, you can plant two or even three seasons a year. Its way and evolution process include: using ratooning rice; Sowing early rice seeds and late rice seeds, harvesting early rice first, and then harvesting late rice; Transplanting, first inserting early rice and then inserting late rice.

Develop into a double-cropping rice intercropping with two crops a year. From Song Dynasty to Qing Dynasty, double cropping rice has been the main farming system in Fujian and Zhejiang coastal areas. The proportion of double-cropping rice is very small. By the Ming and Qing Dynasties, the middle reaches of the Yangtze River had been dominated by double-cropping rice.

Winter wheat was planted in the late rice fields of Taihu Lake Basin from the Tang and Song Dynasties, and a double cropping system of rice and wheat was gradually formed, which has continued to this day. In order to maintain the fertility of rice fields, vetch grass was planted in winter in southern rice fields as early as the 4th century, and then it developed into green manure crops such as Chinese milk vetch and broad bean.

Since Ming Dynasty, rice-cotton rotation has been advocated in coastal cotton areas, which has an effect on increasing rice-cotton yield and reducing pests and diseases. The above-mentioned farming system gradually formed in history is an important reason for the increase of multiple cropping index, the continuous increase of grain output and the enduring soil fertility in China.

The history of rice cultivation can be traced back to Hunan, China, about BC 12000 ~ 16000. 1993, a joint Chinese-American archaeological team discovered the world's earliest ancient cultivated rice in Yuchanyan, Daoxian County.

After being widely planted in China, rice gradually spread westward to India, and was introduced to southern Europe in the Middle Ages. Our ancestors began to domesticate and cultivate wild rice more than 10,000 years ago, and rice production technology reached a fairly high level more than 7,000 years ago.

Thanks to the efforts of our ancestors and the improvement of countless varieties, we can eat such delicious rice today. As a traditional staple food, rice has become one of the cultural symbols in China, which has long influenced the development of language, cooking and customs in China.

After entering the era of farming civilization, agriculture has become the main form of production, and rice has also become an indispensable sacred food in our lives for thousands of years.