In recent years, we have introduced a lot of mutton sheep breeds in China. Then we use artificial insemination technology to make full use of these newly introduced mutton sheep breeds.
First, species of ram selection and management
Should choose a physique that is healthy, has good genital development, is characterized by a male, has a strong sexual desire, and is a ram that is between 2 and 5 years of age and meets the species requirements. For the first time, the rams should be collected and bred through mating or sperm sampling, daily massage of the testicles, and nasal smearing of estrus vaginal mucus or urine. The rams should be raised separately and keep the sheds clean and dry, sunny and away from the ewes pens. Rams should be equipped with dedicated sports fields, exercise regularly, and maintain physical fitness. Feeds should be varied to ensure that they are rich in protein, vitamins and minerals.
Second, identified with oestrus estrus
The estrus identification methods for ewes are mainly test method and vaginal examination. To quickly and accurately find ewes, the two methods can be combined in practical production. The rams and ewes were kept separately. During the mating season, sooner or later, the rams with test cloths were put into the ewes for trials. The ewes were found to actively approach the rams or ewes to receive rams and stand still. It can be considered that the estrus of the ewes is preliminarily marked and transferred to the pending sheds. The vaginal examination method is used to further confirm the judgment. It is found that the vulva is swollen and the outflow of mucus can be designated as estrus.
Third, picking
1, picking preparation
All equipment and utensils used for semen collection must be cleaned and disinfected, stored in a sterilizer, and not exposed to the air. The false vagina must be installed correctly before collection. In brief, the flattened inner tube of the physiological salt solution was filled into a pseudo vaginal shell, and a physiological saline-washed collection bottle was placed on the end of the pseudo vagina. A suitable amount of warm water was injected from the pseudo-vaginal injection hole to maintain the temperature of the false vaginal tube at about 40°C during sperm collection. Screw on the gas jam, put on a double ball, and slowly blow in gas until the surface of the fake vaginal tube is folded into a triangle and does not bulge out, and screw in the gas card. Finally, apply proper amount of physiological saline evenly to the first 1/3 of the false vaginal tube to ensure the vaginal lubricity at the time of collection.
2. Semen collection method
Use a towel soaked in warm water to cleanse the ram's penis and its surrounding skin. The assistant plows down the ewe's neck and Baoding. The sperm is squatted in the right rear of the ewe. When the ram climbs across the ewes, he quickly steps forward. The right hand places the fake vagina on the ewes' buttocks, making the false vagina and the ewe's vagina. Position or penis extension in the same direction, the left hand gently ram penis foreskin, quickly homeopathy into the vagina. When the ram has a forward force, he quickly tilts one end of the bottle with the sperm bottle. When the ejaculation is over, he immediately raises the fake vagina and puts the sperm bottle upside down. Remove the collection bottle.
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