How to Improve the Breeding Ability of Small Tail Han Sheep
Small-tailed sheep are highly productive with multiple births, and have early growth and development. Their large body size has been greatly welcomed by farmers. In order to fully enhance the potential of small-tailed sheep breeding, five new technologies to increase fertility can be used in production.
1. Establish a frequent lambing system. The "two-year three-year production system" is the most feasible. The breeding time is determined in May, January and September, and the lamb production is in October, June and February respectively. Appropriately controlling and shortening post-harvest breeding time can achieve “five-year and five-year productionâ€.
2. Strengthen the selection of sheep. The rams require good development, male characteristics, and excellent semen quality. The species of ewes is required to be the offspring of multiple ewes and have good lactation and brooding performance and good body appearance.
3. Lambs are weaned early. Two-year, three-year, 2.5-3 months of age weaned. Five-year-old, 1.5-2 months old weaned. Watch for lamb rearing after weaning.
4, supplement aphrodisiac. About 1 month before mating, the ewes will improve their dietary compatibility and increase the nutritional level of the ewes. Through supplementary feeding, the ewe can not only improve the estrus uniformity of the ewes, but also increase the number of ovulation and promote the ewes to breed more lambs.
5. Induction of estrus and superovulation. Inducing estrus can use the "ram effect" or increase lighting time to promote ewes ahead of estrus. The use of reproductive hormones to induce estrus and superovulation can achieve more lamb production. A eager ewes or a newly weaned ewes of a lamb can be placed in the cervix or a progesterone (10-12 mg/day) with a cotton plug impregnated with a progestogen (eg progesterone 150-300 mg). ), treatment 10-14 days, then injected pregnant blood serum 500-1000 IU and human chorionic gonadotropin 300-500 IU. Ewes with normal estrus can be injected intramuscularly with 300-700 IU im equine injections for 4 days (12-13 days of the estrus cycle) before estrus is expected to occur. After estrus, 200-300 IU of human chorionic gonadotropin are injected. .
1. Establish a frequent lambing system. The "two-year three-year production system" is the most feasible. The breeding time is determined in May, January and September, and the lamb production is in October, June and February respectively. Appropriately controlling and shortening post-harvest breeding time can achieve “five-year and five-year productionâ€.
2. Strengthen the selection of sheep. The rams require good development, male characteristics, and excellent semen quality. The species of ewes is required to be the offspring of multiple ewes and have good lactation and brooding performance and good body appearance.
3. Lambs are weaned early. Two-year, three-year, 2.5-3 months of age weaned. Five-year-old, 1.5-2 months old weaned. Watch for lamb rearing after weaning.
4, supplement aphrodisiac. About 1 month before mating, the ewes will improve their dietary compatibility and increase the nutritional level of the ewes. Through supplementary feeding, the ewe can not only improve the estrus uniformity of the ewes, but also increase the number of ovulation and promote the ewes to breed more lambs.
5. Induction of estrus and superovulation. Inducing estrus can use the "ram effect" or increase lighting time to promote ewes ahead of estrus. The use of reproductive hormones to induce estrus and superovulation can achieve more lamb production. A eager ewes or a newly weaned ewes of a lamb can be placed in the cervix or a progesterone (10-12 mg/day) with a cotton plug impregnated with a progestogen (eg progesterone 150-300 mg). ), treatment 10-14 days, then injected pregnant blood serum 500-1000 IU and human chorionic gonadotropin 300-500 IU. Ewes with normal estrus can be injected intramuscularly with 300-700 IU im equine injections for 4 days (12-13 days of the estrus cycle) before estrus is expected to occur. After estrus, 200-300 IU of human chorionic gonadotropin are injected. .
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