Goat breeding

 First, early sexual maturity with age, with appropriate
male and female lambs after birth, there is the age of first estrus puberty, often referred to as sexual maturation, secondary sex characteristics have emerged at this time, can produce mature germ cells (sperm or eggs), with the ability to reproduce, but not for immediate breeding. Boer goat female lamb puberty is usually 6-8 months of age, body weight reached 40% -60 of the sheep%. Rams 4 months old, that is sexual, such as the Pa Kua, to discharge sperm. but because of the public, sheep reach sexual maturity of the reproductive organs have not yet fully mature, early mating on their own and future generations are detrimental to the growth and development. Therefore, Boer goat ewes beginning with the general over the age of 10 months, beginning with ram more than 12 months of age.
two Boer goats for precocious estrus
and multiple estrous animals. puberty General 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 heat. estrous cycle of 19-24 days, average 21 days, duration of estrus 24-48 hours, 30-40 hours of ovulation begin after estrus. lactating ewes 7-10 days to estrus after weaning. estrous ewes mainly as follows: 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 mucus, and sometimes flow from the vulva. abnormal heat, malnutrition, improper feeding and management conditions of mutation or environmental reasons. common are the following: < br> 1, quiet heat: As estrogen deficiency, 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 estrus identified in the Boer goat 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 accidental leakage of distribution with reduced conception rate and lambing rates. boer goat There are three kinds of heat identification methods:
1, external observation: is the common method of identification of ewes in heat, mainly from the external observation of ewes to determine the performance and mental state. Boer goat ewes in estrus when the performance the excitement is obvious anxiety, loss of appetite, rumination stop, loudly chirping, wag, vulva and vaginal redness, swelling, relaxation, and a small amount of mucus discharge or outflow.
2, vaginal examination method: This is a more accurate The heat identification. through the opening to check the vaginal mucosa Zhi, secretions and changes in the cervix to determine the heat or not. vaginal examination, the first ewe 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, inside the vagina with a flashlight checking changes. When you find the vaginal mucous membrane congestion, red, bright surface moist, there transparent mucus exudate, the cervix is congestion, relax, open, with mucus out, they can be as heat. checked and gently folded out of control to open Zhi.
3, again the situation of law: 1 day or sooner or later 2 Time will test the ram into the ewe group situation. try to smooth the situation location, easy to observe and out of estrus ewes. When the test rams into the ewes group situation, the staff do not cry, may be appropriate ewes drive group, so that ewes can not crowded together. When you find love again with the nose to the olfactory ram ewe or ewe hoof to flirt, even Pakua back to the ewes, and ewes stood still 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.
Fourth, the time of ovulation identified and timely ovulation Boer goat breeding
mostly late in estrus, 90% of young sheep in estrus 30 hours after the start of ovulation by .75% -85% of ewes in heat production started about 40 hours after 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, slightly ahead of young sheep, the sheep produced slightly delayed. In addition, the situation according to the needs of estrus, sheep estrous long duration, can be re-equipped with an interval of 5-10 hours of time. boer goat breeding law