Boer goat breeding law

 Boer goat breeding law
livestock technician sub
one eighth of China, early sexual maturity with age, with appropriate
male and female lambs after birth, there is the age of first estrus puberty, usually called sexual maturation, secondary sex characteristics have emerged at this time, to produce mature germ cells (sperm or eggs), with the ability to reproduce, but not for immediate breeding. Boer goat female lamb puberty is generally 6 - 8 months of age, body weight reached 40% -60 of the sheep%. ram is 4 months old, having sex, such as the Pa Kua, to discharge sperm. but because of the public, when the ewes reached sexual maturity has not yet fully developed reproductive organs mature and early mating on their own and are detrimental to growth and development of future generations. Therefore, the early Boer goat ewes with normal or above the age of 10 months, beginning with ram more than 12 months of age.
II, estrus < br> Boer goats for the early and multiple estrous animals. puberty is usually 6-8 months of age, estrus season significantly. In the spring and autumn temperatures suitable and adequate forage season, the relative concentration of heat, summer and very little estrus. estrous cycle 19-24 days, average 21 days, estrus duration of 24-48 hours, 30-40 hours of ovulation begin after estrus. lactating ewes after weaning to estrus 7-10 days. ewes mainly for heat : excited anxiety, crying, constantly wagging tail, frequent urination, Pa Kua other ewes, loss of appetite, swelling of the vulva was congestive red tide, vaginal relaxation and the secretion of mucus, and sometimes flow from the vulva. abnormal heat, due to malnutrition, feeding and management mutation or environmental conditions, improper reasons. common are the following:
1, quiet heat: the lack of estrogen secretion, the lack of apparent heat in heat performance, but on the ovarian follicles mature and ovulate.
2, short oestrus: oestrus period is very short, little attention or miss the breeding period.
3, intermittent heat: ewes estrus very long time, and intermittent heat, malnutrition often occurs in early spring ewe .
three identified
estrus in goats breeding work; heat identification is a very important part. identification purpose is to detect estrous ewes, breeding or artificial insemination in the right time to master, to prevent mismatch with reduced leakage rate of conception rate and litter size. boer goat in heat 3 methods identified are:
1, external observation: is the common method of identification of ewes in heat, mainly from the observation of the sheep external performance and mental state to determine. Boer goat ewes in estrus showed obvious excitement when the anxiety, loss of appetite, rumination stop, loudly chirping, wag, vulva and vaginal redness, swelling, relaxation, and a small amount of discharge or outflow mucus.
2, vaginal examination method: This is a more accurate identification of estrus. by opening Zhi checks vaginal mucosa, secretions and changes in the cervix to determine the heat or not. vaginal examination, the first ewes Baoding good, clean vulva, and then open Zhi device cleaning, disinfection, coated with lubricant, the inspectors left open Zhi Wang held devices, closed the front door slowly inserted from the shade, gently open the front, check with a flashlight vagina internal changes. When you find the vaginal mucous membrane congestion, red, bright surface moist, transparent mucus exudation, the cervix is congestion, relax, open, with mucus out, they can be as heat. checked and gently folded open Zhi device out.
3, try love Law: Sooner or later every 1 or 2 times a regular situation will test the ram into the ewe group. try to smooth the situation location, easy to observe and out of estrus ewes. When the test conditions rams into the ewes group, the staff do not cry, may be appropriate to drive sheep group, the ewes can not crowded together. When you find love again with the nose to the olfactory ram or sheep hoof to tease Mother sheep, sheep and even back to the Pa Kua, and ewes standing immobile or active when close to the ram, this is the estrous ewes ewes. At this point, to immediately isolate the heat to prepare for breeding ewes. test time of 1 hour the situation is appropriate.
IV and timely determination of ovulation time Boer goat breeding
mostly ovulation late in estrus, 90% of young sheep in estrus 30 hours after the start of ovulation .75 % -85% of ewes in estrus by the middle of 40 hours or so after the start of ovulation. Based on the data, the general optimum breeding time in estrus before the end of 5-8 hours, or an average of 30-35 hours after estrus beginning to start breeding, young sheep slightly earlier, slightly delayed by the sheep production. In addition, the situation according to the needs of estrus, estrus sheep long duration, can be re-interval of 5-10 hours with 1.