First, equipment. Liquid nitrogen tank (preferably 3 liters), liquid nitrogen, frozen sperm (more convenient for fine tube freeze-in), insemination gun (tube), thermometer, tweezers, scissors, 3 m long rope. The weight of the above devices does not exceed 15 kg.
Second, the operation
1. According to the farmers to report the cow's estrus status and their own experience to determine, choose time to bring good equipment to farmers.
2. Baoding of estrus cows. Baoding with traditional yak method Baoding, that is, rope Baoding. First, the estrus cow is picked up on a stable pile, and then a three-meter-long rope is folded in half, wrapped around the hooves and hanging hoofs of a cow's hind limbs; then the end of the rope is passed through the cow's Pull the middle of both forelimbs to the neck and pull the other end from the outside of the forelimbs to the neck. Finally tighten the knots on both ends of the rope in the neck so that the cow is tied to the hind limbs. In addition, use a string to lift the cow's tail and clean the genital area of ​​the cow with clean water.
3. Semen thawing: First use a container to prepare a proper amount of warm water at 37-42°C. Then use a tweezers to remove a fine tube of frozen essence from a liquid nitrogen tank and immerse it in warm water. Gently shake about 10 times to remove and wipe the surface water of the tube. Beads, cut off the seal, put the end of the plug down into the gun, tighten the jacket.
4. Insemination: insert the rectum into the rectum and grasp the cervix across the intestine wall. At the same time, the arm is pressed down with force to make the vulva open. The other inseminat gun, which is already on the tube, is tilted upwards from the vulva gate. After inserting a section, insert it further downwards to align the insemination muzzle to the cervix uterus and insert it into the junction between the cervix and the uterus. The semen can be withdrawn at the same time as the semen is injected. In order to ensure the conception rate, it is compounded once a day.
5. Postoperative clean-up: First loosen the cows; secondly, clean the equipment and lay the packages; then go to the station and sterilize the equipment. Save it for next use.
With ropes Baoding, it is possible to breed with households and expand the allocated surface without affecting the health and fertility rate of cows, and it is very popular among farmers.
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