The main measures of raising Boer Goat to improve its fecundity

Boer goat is a precocious and high-yield meat sheep breed, which can be in estrus all the year round, but the estrus peak in autumn is from August to November, and the semen quality is the best, generally in the area of 35 °north latitude to 35 °south latitude. The estrus season of Boer goat in alpine area is short and that in plain area is long. The estrus season of Boer goats in warm areas is long, while that in cold areas is short. How to improve the fecundity of Boer goats?

1. Choose to keep prolific breeding sheep. The lambing of Boer goats is more or less hereditary, so the breeding sheep can be selected from the offspring of male and ewes with multiple lambs.

2. To increase the proportion of ewes of appropriate age in the flock. The old, weak, sick and disabled sheep will be eliminated in time, and young ewes will be replenished every year, so that the proportion of ewes of appropriate age will account for more than 60% of the flock.

3. Eliminate infertile sheep. The sheep that are not in estrus, pregnant, often miscarried, give birth to inferior lambs and weak lambs are eliminated in time.

4. Supplementary feeding to promote estrus. One month before mating, improving the dietary composition and increasing the nutrition level, especially the protein nutrition level, can promote ewe estrus, increase the number of ovulation of ewes, and increase the rate of double lambs or three lambs. Turquoise succulent feed can promote gonadal activity follicular maturation and polyovulation in ewes. Ewes can significantly improve their fecundity by eating more of this kind of feed before mating.

5. Timely mating or insemination. Accurate grasp of ewe estrus time and duration of estrus, timely mating or insemination is the key to improve the conception rate during estrus. Early insemination, especially for ewes with long duration of estrus, if the survival time of sperm in the body is shorter than the time of ovulation, the sperm can not be fertilized after ovulation, and the time to maintain the ability of fertilization after ovulation is shorter than that of sperm. when insemination is too late, when the sperm is capacitated and reaches the fertilization site, the egg has lost its fertilization ability, which will also lead to fertilization failure. Ewes usually have a high conception rate within 8-20 hours after estrus.

6. Adhere to the compound system. After the first mating of ewes, the ewes were mated again after 8-12 hours. When recombining, you can use the same ram or different rams.

7. Rational use of egg-stimulating hormone. LH (luteinizing hormone), HCG (chorionic gonadotropin) and LRH-A3 (ovulation stimulating hormone No. 3) can promote ovulation in animals. Injecting these hormones into ewes during mating can not only promote ovulation, but also promote the formation and secretion of corpus luteum, which has a good effect on improving the conception rate of mating. The applied dose of Boer goat is LH50 unit, HCG500 unit, LRH-A3 40-60 μ g.

8. Rational use of sperm-stimulating hormone. Oxytocin has the physiological effect of promoting uterine contraction. Injecting oxytocin or prostaglandin into the uterus of ewes before mating or adding a certain unit of oxytocin or prostaglandin to semen can increase the running speed of sperm in the reproductive tract of ewes and improve the conception rate.