I. Identification of estrus in ewes is the key
The estrus performance of Small Tail Han sheep is different from that of goats, and the estrus performance is not obvious. Only a few sheep can be identified by this method. The main method is the test method and vaginal examination.
1. Test method
The test of feelings is a method of using rams to find ewes in order to find the estrus ewes correctly. However, when this method is adopted in rural areas, it is necessary to keep the ram and the ewes separately and to ensure that the ram's libido is to find estrus. When the ram is in the ewes group, when the ram is sniffing the ewes or hoofs to tease the ewes, the ewes will stand still, or the ewes will actively approach the rams as estrus. Use vaginal examination to judge again.
2. Vaginal examination
The oestrus's vaginal mucous membranes are hyperemia, smooth and moist, with transparent mucous exudation. The cervix is ​​congested, relaxed, and opened. When mucus flows out, it can be designated as heat.
Second, the sheep's sperm and semen processing technology
Sheep artificial insemination technology can be divided into two kinds: fresh semen artificial insemination and frozen semen artificial insemination. It is best to use sheep's fresh semen artificial insemination artificially inseminated.
1. Semen collection
Before harvesting, firstly install and disinfect the sheep's fake vagina, and paint a small amount of sterilized vaseline in the first 1/3-2/3 of the inner tube to achieve the purpose of lubrication. 40-42°C warm water (150-180ml) was slowly poured from the irrigation hole into the false vaginal casing and the inner tube so that the water temperature between the outer shell and the inner tube reached 38-40°C. The water temperature may change with the season, and the winter temperature is slightly lower than the summer. high. Blow a proper amount of gas into the false vagina and adjust the pressure of the false vagina. It is appropriate to use the false vaginal entrance as “Y†or “Xâ€. Then use the ewes as mutton sheep, preferably estrus ewes. The height of the chilly sheep is higher than that of the dolphins, and it is not easy for the moor sheep to climb the ewes, and the ewes should be placed in a slightly awkward place. When the ram crawls on the ewes' backs, the ram penis is quickly introduced into the false vagina. After the ram has ejaculated, the false vagina is erected, and the collection cup is set downwards, and the collection cup is removed for semen examination. If the rams do not ejaculate several times, they should push the rams several times before picking, and if the rams do not exercise enough, the rams should be exercised.
2. Semen processing
The normal ejaculation amount of the Dorper sheep is 1-1.5ml. It is milky white with cloudiness. Observe the density and deformity rate under the microscope. The sperm density should be above 0.6 and the semen density should be above “middleâ€, ie every milliliter. 200-400 million spermatozoa can be used for production, and sperm abnormality rate must be ≤15%.
Eligible semen can be used directly for insemination, but it is best to dilute according to the multiples of the dilution. If the insemination is not saved at the time, it can be diluted with VB12 or milk (used after filtration with 8 layers of gauze).
Third, insemination technology
1. Insemination
Timely and accurate delivery of a certain amount of high-quality semen into the cervix of the ewes is the key to ensuring that the ewes are conceived. In the insemination operation, the genital area of ​​the ewes to be inseminated should be first cleaned and scrubbed with benzalkonium chloride, and then wiped clean with water or saline cotton balls, and the rear ribs of the ewes should be placed on crossbars about 70-80 cm above the ground level, or The two raised the hind legs of the sheep, and the inseminating person inserted the vagina of the ewe with an opener or an endoscope. The depth and angle were used to find the mouth of the cervix, and the inseminator was slowly inserted into the cervical os. 1.0-2.0 cm. The required amount of semen (the original fine 0.05-0.1ml) is slowly injected, and then the twitching massager is reciprocated and massaged for about 1 minute. After the opener or the endoscope is withdrawn from the vagina, the hen's thigh is slapped. Contracting the cervix helps prevent semen from draining.
2. Insemination time and frequency
When the ewes begin to have estrus, control begins 8 to 12 hours after the first insemination (hypodin is delayed properly for several hours), and the characteristic of cervical mucus can also be used as a symbol of timely insemination, and its sign is transparent. The mucus became turbid, and when it finally became cheese-like, the effect of insemination was best. Generally take 1 trial, 2 insemination, that is, the first infusion in the afternoon after the trial situation in the afternoon, the next morning and then lose 1; afternoon feelings, the next day, 1 loss in the afternoon.
3. Precautions
1 Accurately determine the estrus of the ewes is the key to ensure the conception rate. It is recommended that the rams should be used for the estrus assessment.
2 Deep insemination 1.5-2.5cm can effectively increase the conception rate, and should be as deep as possible, so that the conception rate can be high.
3 In the cold winter months, the spermatozoa should be warmed up to body temperature and then placed in semen to prevent sperm freezing and shock.
4 The insemination device should be rinsed with water immediately after use and washed with distilled water for 1-2 times. After each sheep has been transfused, it should be disinfected with an alcohol swab, and then rinsed with saline twice before use.
5 Avoid all the equipment that comes into contact with sperm with water. Water can cause sperm death, so you can use saline to wash it more than twice.
6 The ewe after insemination should stay in the original Baoding position for a while and then release activities to prevent backflow of semen.
7 Insemination of virgin sheep, because of its vaginal stenosis, insemination can not reach the cervix mouth, can only be the bottom vaginal insemination, so insemination, the amount should at least double.
Anti-Aging Superfood - Goji berries are considered the world's most powerful anti-aging food. They're rated #1 on the ORAC (Oxygen Radical Absorbance Capacity) scale, which measures the antioxidant level of foods. Antioxidants fight free radical damage associated with diseases and premature aging. Dried goji berries contain 3 times the antioxidants of pomegranates!
Protect Eyesight - Goji berries contain two key nutrients that support vision: lutein and zeaxanthin. Studies show that consuming high amounts of lutein and zeaxanthin lowers the risk for developing age-related macular degeneration, cataracts, and other eye diseases.
Promote Skin Health - The vitamins in dried goji berries can give your skin a healthy, youthful glow. The rich content of vitamin A, vitamin C and zinc naturally occurring in goji berries helps to improve skin tone and texture. Research suggests that vitamin C and zinc act as antioxidants to lessen the harmful effects of UV radiation on the skin.
Boosts Immune System - Goji berries contain even more vitamin C per ounce than oranges. They are also high in the trace element selenium, which fights bacterial and viral infections. Adding a small handful of dried goji berries to hot teas or soups isn`t a bad idea when the cold and flu season hits.
Good Source of Amino Acids - Goji berries contain 18 amino acids, including all eight essential amino acids. Our bodies use this combination of amino acids to build the proteins we need. Since we cannot synthesize essential amino acids from scratch, we must obtain them through our diet.
Liver & Kidney Benefits - A compound found in goji berries called betaine, is used by the liver to produce choline. Choline supports the liver and kidneys by helping them expel toxins and waste from the body.
Goji Juice,Goji Wolfberry Juice,Goji Oil
Ningxia Rich Resource International Co., Ltd , https://www.richresources-nx.com