First, management before mating
One month before mating, the ewes are in a state of growth and should not be too fat. Vitamin A, vitamin D, and vitamin E are taken 3 weeks before the start of the breeding period. For the milking ewes, prepare a small tent for salt, supplement a small amount of corn every day. 2 to 3 weeks before breeding, the ram is placed in the trial, and the local abortion vaccine is inoculated 1 month to 2 months before the breeding.
Second, mating season management
1, group breeding. Separate young ewes from adult ewes as much as possible. Arrange 1 ram for every 35- 40 ewes.
2, a single breeding. One ram per 50 ewes.
In both cases, the rams should be kept in a small shade shed for a small amount of feeding. Leave the ewes at night and put them in rams.
3, artificial insemination. Vaginal sponge plugs were placed on the first day of the estrous cycle and sponge plugs were removed on the 14th day of the cycle. Then, at 48 hours, 60 hours and 72 hours, 0.25 ml of 0.5 ml of pregnant horse serum gonadotropin was injected. Ewes that are inseminated on the same day usually lay lambs within 5 days to 7 days, so they should be arranged during artificial insemination. Avoid over-eating estrus at the same time, so as not to cause trouble in a bad weather. In the case of artificial insemination, there must be measures to prevent heat and keep the ewes as quiet as possible. After artificial insemination, the trial ram or young ram is placed in a fence separated from the ewes, and the pre-insemination nutritional level is maintained.
III. Management after mating
Maintain the same feeding and management level in the first month after breeding to prevent miscarriage. 40 days after mating, ultrasound was used for pregnancy diagnosis. Either mark the insemination ewes and put them together with the trial rams 14 days later to observe the returning ewes and to determine if they are pregnant.
IV. Management before lambing
Anti-uterine necrosis vaccine was administered 2 months to 3 months before lambing. The symptoms of the disease are severe uterine uterus inflammation and death within a short period of 3 days after lambing. Take anti-TB drugs 1 month before delivery to prevent breast infection. In the last 3 weeks of gestation, in order to ensure the growth of the fetus, the ewes should be supplemented with nutrients and supplemented with vitamin A, vitamin D, and vitamin E. Since the average lambing rate of Boer goats is 180 %, many triplets can occur, and nutritional supplements can make lambs robust, which is especially beneficial for maintaining the viability of multiple children.
V. Management of the Lamb
Lambs are prone to diarrhoea due to overdose and begin to infect aphids, contagious pustular dermatitis, and brucellosis. Prevention and symptomatic treatment should be performed. Commodity Boer goat lambs should be castrated within 2-4 weeks postpartum. Male lambs were weaned at 3 months of age and 3.5 months of age, and female lambs and castrated lambs were weaned at 3.5 months to 4.5 months of age.
Sixth, breeding and listing
(1) breeding of rams. Breeding was based on the breed standard of modified Boer goats. The first selection was carried out at the age of 2 weeks to 4 weeks. All but the selectors were castrated; at the 2nd and 3rd months of age, the second selection was conducted. The unselected males were also taken. Possibility; and slaughtered all the slaughterers for the next 3 months. Continue to observe and evaluate the selected reserve rams.
(2) Breeding of breeding ewes. When the first seed is selected at the time of first sale, and then based on its breeding ability and various indicators of offspring selection, when selecting large ewes, the ewes during lactation and dry period should not be placed in one group for evaluation. To avoid different impressions
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