The scientific construction of sheep houses requires the sheep house to face southwards, leeward, sunny, clean and easy to grazing. The size of the sheep house is preferably 1.0 to 1.2 square meters per sheep. The bed of goats is 1.0m to 1.5m above the ground. The diameter of the head of the sheep bed is more than 12cm, and the distance between the bars is 40cm to 45cm. The bed board is padded with 7 cm to 10 cm wide bamboo slips, and 1.0 cm to 1.5 cm wide gaps are left between the bamboo sheets. There are classified fences such as basic ewe fences, pregnant ewe fences, and mother fences. There are playgrounds outside the house.
Choosing excellent breeding sheep according to the use of high-yielding excellent sheep breeds. Sheep breeds that are suitable for hybrid ewes include Small Tail Han sheep, Altay sheep, Jiangsu Hu sheep, etc.; Dairy goats may choose Swiss Shannen goats, Shaanxi Guanzhong dairy goats, etc.; Sheep may choose Xinjiang fine-wool sheep, Roma sheep, etc. Variety. Requests for exotic breeds of ram to weigh more than 40 kilograms, ewe more than 30 kilograms, local rams weigh about 30 kilograms, ewes about 20 kilograms. The rams are of robust body size, straight back, broad chest, wide testicles, and well-developed males. The ewes are large in size, compact and full-bodied, with a straight back, a slightly larger posterior abdomen, well-preserved limbs, and well-developed breasts and reproductive organs. .
The breeding ability of male rams for breeding rams depends on a strong constitution, ample energy, and a strong sex drive. Therefore, it is necessary to ensure adequate supply of protein, vitamins, and minerals in feed, and maintain a moderate degree of lyricism in breeding sheep. In the first month before mating, daily supplements such as corn, wheat bran, bean cake, and bone meal concentrate 0.50 kg to 0.75 kg, radish, vegetables and other green and white succulent feed 1.5 kg, 2 eggs, enough for drinking water. The rams are bred only once a year to prevent the lambs from producing lambs all year round. Sheep that are not in the breeding season should be grazing alone.
The initial mating age of the litter-born ewes is 10 months or more and the rams are 8 months. If the 1-year-old 2-children can be arranged for breeding in the spring and autumn seasons. The ewes showed ectopic flushing, efflux of mucus, wavy upturns, continuous vocalizations, and reduced feeding and restlessness. The ewes were found to have estrus and should be bred in time. The natural mating ratio is 1:20 to 1:30 for the male to female ratio, and the artificial male to female ratio is 1:60 to 1:80 for artificially assisted mating. The first mating 12 hours to 24 hours can be repeated 1 breeding, is conducive to improve the conception rate and the number of litter.
Artificial aphrodisiac vaginal sponge method: Place the progesterone-soaked sponge at the esophageal cervix outside the mouth for 10 days to 14 days. After stopping the drug, the pregnant horse serum gonadotropin 400 units to 500 units will be injected. After about 30 hours, the ewe will be injected. You can heat, insemination on the same day and on the next day. The hormones used are progesterone 150 mg to 300 mg, medroxyprogesterone 50 mg to 70 mg, ketide 80 mg to 150 mg, 18 methyethynostone 30 mg to 40 mg, and fluroginone 20 mg to 40 mg . The drug was evenly fed into the feed and fed for 12 days to 14 days. The dosage was 1/5 of the vaginal sponge method, and the intramuscular injection of pregnant goat serum gonadotropin 409 units to 750 units on the day of discontinuation. Several days after the end of the estrus of the ewes, the progesterone is injected into the uterus or intramuscularly, and estrus can be bred for 2 days to 3 days.
Induced multiple lambs superovulation method: In the 12th to 13th day of the estrus cycle, intramuscular injection of maternal serum gonadotropin 600 ~ 1100 units, immediately after estrus breeding, intramuscular injection of chorionic gonadotropin in the day 500 units ~ 750 units, can discharge dozens of eggs. The aphrodisiac is supplemented 30 days before the ewes are mated. There are two kinds of water and oil additives.
Careful rearing Ewes must be fed in addition to grazing, especially during the mating season, during pregnancy, and during lactation. The principle of feeding is to feed the grass first, then feed the grass better; feed before the animal husbandry, the grass after feeding; feed trough, less to add Tim; winter and spring drink warm water, summer and autumn Drink well water. Ask the feed to be fresh and free of mildew, drinking water is clean and non-toxic. Grazing in spring to control the sheep, to prevent "running green." Summer heatstroke rest, fall and winter distance grazing late returning to animal husbandry, late frost, animal husbandry, pasture, snow grazing, pregnant ewes grazing late in situ. It is strictly forbidden to whip, hurry, scare, cross-ditch, cross-over, etc. in grazing to prevent miscarriage. Pregnant sheep have the abortion of abortion, can be intramuscular injection of progesterone 0.1 grams to 0.2 grams, 1 injection a day, continuous injection of 4 days to 6 days.
Make ewe deliver production
The ewes' gestation period is about 150 days, and they enter the delivery room 7 days before the birth. The delivery room was thoroughly cleaned and disinfected one week in advance, and the grass was kept on the ground, and the temperature was maintained at around 8°C. The equipment used for the production shall be cleaned and disinfected, and the confinement personnel shall shorten the nails and disinfect. Wash the tail of the ewes, the genitals and the anus of the ewes before giving birth. Disinfect with the 1% scrub. After the lambs are produced, wipe the umbilical cord with iodine to prevent infection. In case of fetal or fetal position is not correct to correct the fetal position, and the implementation of artificial midwifery. In case of premature death of the lamb, the mucus and fetal water in the respiratory tract should be removed first, the nostrils should be cleaned, and the animals should be blown to the nostrils or artificially respired. The frozen lamb is to be transferred to a greenhouse and placed in a bath of 38°C to 40°C for 20 minutes to 30 minutes. It has been proved that injecting estradiol benzoate or cloprostenol in 1 ml to 2 ml 3 days before the ewes' pre-production can enable 90% of the ewes to breed lambs within 48 hours, and control the ewes to produce during the day. Lambs are easy to care for and the lambs have a high survival rate.
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