Chicken is a kind of poultry. Domestic chickens originated from wild chickens, and the domestication history was at least about 4000 years, but it was not until about 1800 that chickens and eggs became mass-produced commodities. The types of chickens are turkey, black-bone chicken, pheasant and so on. Moreover, chicken is also an animal sign in the 12 zodiac.
Chicken is delicious and nutritious. Most of the nutrients in chicken are protein and fat, but chicken lacks calcium, iron, carotene, thiamine, riboflavin, nicotinic acid, various vitamins and crude fiber. If you take chicken as the staple food for a long time and don't eat other fruits, vegetables and grains, it will easily lead to sub-health.
According to scientific investigation, eating chicken has a great impact on human health, especially on the health of the elderly and women.
Nutritionists point out that on average, the cholesterol content in chicken is the highest because people eat all kinds of foods a day. Cholesterol will greatly increase the risk of cardiovascular and cerebrovascular diseases. If the elderly and women eat chicken every day, there will be excess cholesterol in their bodies, which is not only harmful to health, but also increases the risk of heart disease and cerebral thrombosis.
In addition, some unscrupulous traders add hormones to chicken feed, which leads to hormone residues in chicken and will also affect human health.
Eating chicken with hormones in pregnant women will lead to milk return and obesity; Underage can also lead to precocious puberty.
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China is the first country in the world to domesticate chickens, with a history of at least 4,000 years. In Hubei, Jiangxi, Shandong, Henan, Gansu and other provinces, there are chicken bones or pottery chickens more than 4000 years ago. Chicken raising in China is domesticated by pheasants, and there are many excellent varieties, among which Huang and Langshan chickens are very famous. Huang, also known as Pudong Chicken, is a large broiler with yellow feathers, beak and feet, so it is also called Sanhuang Chicken. Nine catties of yellow, particularly large, delicious meat, so it is welcomed by people all over the world, and has played a great role in the improvement of domestic chicken varieties in the world.
1843 was first introduced to Britain, and 1847 was introduced to the United States. American Rock Chicken is a hybrid of nine catties of yellow and 1865 black and white American chicken from China. The Japanese introduced China chicken in the Sui Dynasty, and at the end of the shogunate, they introduced nine catties of Shanghai yellow chicken to cultivate the famous Nagoya egg and meat chicken. Langshan chicken is mainly produced in Jiangsu, with strong disease resistance and developed breast chicken. 1872 was introduced into Britain, and the famous British breed, Opington Chicken, was made by crossing Langshan Chicken with local chicken. Later, Langshan chicken was imported to the United States and Germany. It can be seen that the domestic chicken breeds in ancient China have great influence on the world.
Refer to Baidu Encyclopedia-Chicken