Terrier comes from an online video. A girl told her boyfriend that pure milk is 50% breast milk, and this word became a hot topic on the Internet. Han Han girl bluntly said that pure milk is 50% female milk. Her boyfriend savored this sentence carefully before he realized that only female cows can have milk. Later, she posted this video on the Internet, which triggered a fire.
In fact, cattle is a kind of cattle. After a cow gives birth to a calf, it will continue to secrete milk for one year, and the milk yield is much higher than that of other breeds. Of course, it is also divided into male and female. Only female cows can produce milk, and male cows are used for mating.
Expand your knowledge: What kinds of cattle are there?
1, black and white cattle
Black-and-white dairy cows are the largest, most widely distributed and highest milk yield dairy cows. Originated in West Friesland and North Holland in the Netherlands; It is distributed in northern France and Holstein province in Germany.
2. Juan Niu Shan
Cirrhorn cattle are imported from Jesse Island in the English Channel. Its breed is related to Swiss brown cattle, Devon cattle and Kerry cattle, but has nothing to do with Holstein cattle. The greatest advantage of precious cows protected by the British government is that they are rich in milk, with milk fat and milk protein content significantly higher than that of ordinary cows, and high-quality milk protein content is above 3.5%.
3. Kiwifruit hybridization
According to the statistics of New Zealand Dairy Association, in 20 12 years, the proportion of He Juan hybrid dairy cows in New Zealand has reached 4 1%, which is the largest hybrid dairy herd in the world and the largest dairy herd in New Zealand.
4. Compare cattle
Gengsai cattle is a medium-sized dairy cow breed, which originated from Gengsai Island, England, and is famous for its high milk fat, high milk protein and high carotene content in milk. At the same time, it also has the characteristics of high conversion efficiency of unit milk feed, short calving interval, early calving age, rough feeding tolerance, easy grazing and good adaptability to warm climate.
5. Erxia cattle
Elsa cattle is a medium-sized cow, which is native to Elsa County, England. It is one of the famous cow breeds. It is characterized by precocity, rough tolerance and strong adaptability. It has been exported to more than 30 countries, such as Japan, the United States, Finland, Australia, Canada, New Zealand, etc., and has quotations in China, Guangxi, Hunan and other provinces and cities. However, due to its spirituality and management difficulty, there are few purebred cattle.