The composition of the instant chicken feed reveals whether the instant chicken is safe or not.

Fast-food chicken mainly refers to white feather broiler, which has a short feeding cycle, tender meat and easy cooking, and is very large in China. White feather broilers are generally raised for about 40 days, and the average weight can reach 5.5 kg. Zhang said, the owner of Xiaochizhuang Chicken Farm in gaomi city, Weifang, Shandong Province, which was exposed by CCTV, that it only takes 40 days for chicken seedlings to grow from 30 grams to 5 kilograms, and the big ones can grow to six or seven kilograms.

When the report came out, public opinion was in an uproar. Many people talk about the discoloration of "chicken", which lasts for 40 days to more than 5 kg. Antibiotics are eaten as meals. This kind of chicken is on the table. Shall we eat chicken or take medicine?

Related news: There is no need for slaughtering and drug testing, and the instant chicken is unimpeded on the dining table.

Before the CCTV report came out, the curious laboratory of Metropolitan Express was doing an experiment on antibiotic residues in chicken liver. Not long ago, some media reported that "eating seven chicken livers can cure a cold" because fast-growing chickens use a lot of antibiotics. Because the experiment is very complicated, the result hasn't come out yet. However, in the interview, Curious Lab also learned a lot about the background of fast-food chicken and provided it to everyone to help them analyze this hot event together.

Fast chicken is not terrible.

World broiler slaughter time

Currently it is 42-48 days.

First of all, let's talk about whether the "instant chicken" that has been released for more than 40 days violates the laws of nature and how it came from.

Speaking of food safety, there is always such a sigh: in the past, the mountains and rivers were clear, the fields were not fertilized, and chickens, ducks and fish did not eat feed. But the reality we are facing now is that such a big earth is still being destroyed. If we want to feed so many people and do not rely on modern aquaculture, many people will starve to death.

At present, China people eat more than 6.5438 million tons of chicken every year, and the average annual consumption is about 20 Jin. Americans prefer to eat chicken. More than 20,000 chicken farms produce nearly 9 billion chickens every year, and every American eats about 80 kilograms of chicken every year.

According to the traditional chicken raising mode, a chicken needs to be fed for more than half a year before it can be released. If you put it on this speed and cost, there will be two consequences: one is that you can't eat chicken, and the other is that you can't afford to eat chicken.

For this reason, from 65438 to 0950, the modern chicken industry came into being in Germany, which was soon introduced to the United States and developed rapidly. Some breeding companies choose and cultivate chicken breeds in order to make them grow more and faster, so as to promote the continuous evolution of chicken breeds, so as to grow faster and faster.

According to FAO statistics, the average slaughter time of broilers in the world has been shortened from 67 days in 1960 to 42-48 days at present, the most representative of which is the white feather broilers raised in the United States exposed by CCTV; In China, the Technical Regulations for Commercial Broiler Production revised in 2005 stipulates that the body mass index of broilers at 6 weeks old, that is, at 42 days old, is 2420g g.

That is to say, it is not a characteristic of China to slaughter broilers for more than 40 days. This is a normal phenomenon of broiler breeding all over the world, and it is well-known common sense in the industry, but most consumers don't understand it.

Why can a quick chicken be quick?

The "quick chicken" exposed this time is white feather broiler, which is the representative variety of "fast and big" broiler. It grows rapidly and has large pieces of meat, and is widely used by fast food chain enterprises such as KFC and McDonald's. So why can it grow so fast?

First of all, this is due to the continuous optimization and improvement of chicken breeds. It can be said that they were born with meat. Since 1980s, China has introduced white feather broiler breeders on a large scale, and since then, the chicken production has made a leap. In fact, the breeding of breeders is still a high-tech industry, which is very difficult; At present, only a few large breeding companies in the world have mastered this technology.

Secondly, the reasonable feed ratio.

On modern farms, chickens eat artificial feed. Qi zhou, a professor at the College of Animal Science and Technology of Zhejiang University, said that chickens, like humans, need carbohydrates and protein for growth, and the complete compound feed for "fast-growing" broilers mainly contains these two nutrients.

"Carbohydrates are mainly corn and wheat, while protein is made of soybean meal, cottonseed meal and rapeseed meal, which is the remaining raw material after oil extraction." Professor qi zhou said, "In addition, the feed also contains some nutritional additives such as amino acids, vitamins and trace elements."

This complete compound feed can be divided into three types: prophase, metaphase and anaphase, and chickens need different feeds at different growth stages.

"Eating breakfast feed in the first 10 days is mainly to improve physical fitness. /kloc-eating Chinese feed from 0/0 to 20 days is mainly for long bones. Eating late feed after 20 days is mainly for fattening and fattening. " Dr Zhang Xiaodong from the College of Animal Science and Technology of Zhejiang A&F University said.

Finally, it depends on the standardized management of modern chicken farms. The henhouse is a completely enclosed environment, and the conditions such as temperature, humidity, light and ventilation can be controlled, which provides a stable environment for the rapid growth of chickens. Coupled with regular feeding, water supply and other procedures, these refined scientific feeding methods ensure the rapid and accurate growth of broilers.