China is a country with the longest history of rice cultivation in the world. According to the research of Hemudu excavation in Yuyao, Zhejiang Province, rice was planted here as early as six or seven thousand years ago. Since the beginning of 2 1 century, a series of recent archaeological discoveries have consolidated this conclusion.
China's ancient book "Shihuozhi" once recorded that "an envoy took 30,000 meters of welcome rice from Fujian, and gave it to three roads for planting, and those who chose Mu Mintian were covered with dry rice. ..... Rice is longer than China without awns, and the grain difference is small, so it is chaotic. " However, it is still controversial, because scholars suspect that, in terms of regional climate, Zhancheng rice may be upland rice, not the earliest upland rice.
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Rice is one of the most important food crops in the world today, and more than half of the world's population takes rice as the main food source. Rice is not only a staple food, but also has many economic functions that contribute to mankind in the long evolutionary history. For example, rice bran is one of them. Rice bran is the cortex of rice and can extract oil. In Japan, rice bran oil is regarded as a sacred whitening product.
In addition, rice bran can also pickle vegetables, or even become a dish alone, which is called fried rice bran. According to scientists, the nutritional value of rice bran is also quite high. Besides 64% nutrients in rice, it also contains more than 90% nutrients needed by human body. Besides rice bran oil, rice bran protein and rice bran nutrients are the main research directions of scientists.
Baidu encyclopedia-rice