Grains refer to five kinds of grains. In ancient times, there were many different sayings, among which there were two main ones: one refers to rice, millet, millet, wheat and rice; The other refers to hemp, millet, millet, wheat and glutinous rice. The difference between these two statements is that the former has rice without hemp, while the latter has hemp without rice. The ancient economic and cultural center was in the Yellow River valley, and the main producing area of rice was in the south, while the cultivation of rice in the north was limited, so there was no rice in the "five grains" at first.
Grains culture is the origin of human civilization. "Valley" originally refers to grain with shells; Like rice, millet (millet) and millet (yellow rice), there is a shell outside, so it is called valley. The sound of the word Gu comes from the sound of the shell. Grains were originally called five kinds of grains in China in ancient times, and later they generally referred to grain crops.
Grain culture:
Cereals mainly refer to the seeds of plants. It includes rice, wheat, soybeans and other miscellaneous grains, such as millet, black rice, buckwheat, oats, coix seed rice and sorghum. Grain is the staple food through processing. It mainly provides 50% ~ 80% heat energy, 40% ~ 70% protein and more than 60% vitamin B 1. The nutrient content of cereals varies greatly due to the variety, origin, growth conditions and processing methods.
As a traditional diet of China people, cereal has been one of the indispensable foods on the table of ordinary people for thousands of years, occupying an important position in China's diet and being regarded as a traditional staple food. "The Analects of Confucius and the Rural Party": "Although there is a lot of meat, it does not make it better than eating." This is when Confucius was an aristocrat in the Zhou Dynasty, the staple food (grain) should occupy the largest proportion according to the aristocratic living habits.