What are the techniques and methods of artificial insemination of cattle?

At present, cattle artificial insemination technology has been very popular in China, it has played a very important role in the improvement of yellow cattle and dairy cows, and the coverage rate of improved breeds has been increasing. What are the skills and methods of artificial insemination of that cow?

Cattle are inefficient in natural breeding and need to breed too much, and artificial insemination is now generally used. recently, the reporter interviewed a member of our expert advisory team, Professor Lin Qing of the School of Animal Science and Technology of Northwest University of Agriculture and Forestry.

1. Breeding cattle selection

Each cattle farm only needs about a few breeder cattle, which are generally of good breed, gentle temperament, and must be replaced frequently. Breeding cattle should be very fine, and feed concentrate and forage with a certain amount of eggs, fruits and sugar. And the breeder cattle have to be given regular physical examination to ensure that the breeder cattle are healthy and strong.

two。 Artificial semen collection

Semen collection needs to clean the seminal tube first, using saline, distilled water and 75% alcohol. Cover the rubber sleeve evenly on the seminal duct and wash it more than 3 times. When collecting semen, heat the seminal duct to about 38 ℃, fix the estrus cow in the column, and hold the semen collector artificially when the bull climbs. Pay attention to the personal safety of the operator when collecting semen. After collecting the semen, observe its activity under the microscope and determine that the sperm activity is good, then it can be diluted with distilled water and sealed.

3. Artificial insemination

The frozen semen was thawed in 40 ℃ lukewarm water, then examined under a microscope and fertilized without any problems. Hold the gloved hand into a cone, extend it into the rectum of the estrous cow under the action of paraffin oil lubrication to help the cow defecate, go deep into the rectum and touch the uterine horn to check the condition of the ovary and uterus, and hold the cervix, hold the cervix in hand and slide gently to stimulate the sexual excitement of the cow. Healthy cows in peak estrus will have egg white-like mucus outflow from the vagina, according to the mucus characteristics can be determined whether there is uterine disease, estrus status. At this time, it is necessary to use professional tools such as insemination guns, and insemination operations are carried out by professionals.