Two-year-old sheep can be bred in March-April, and lambs are born from August to September. The breeding period is from September to October. The second child is born from February to March of the following year. Two-year-old, three-year-old sheep can be bred from August to September and lambs will be born from January to February of the following year. The animals will be bred from March to April in the following year and will be born from August to September in the following year. The breeding will be conducted from October to November in the following year. From March to April, lambs are born again. Second, the same period of heat At the same time, estrus is the use of certain hormone preparations to artificially control the process of adjusting the cycle of estrus in a group of ewes, so that they focus on estrus in a predetermined time, so that a reasonable organization and breeding can be planned. 1, commonly used in the same period of estrus drugs: currently used in sheep estrus drugs in the same period there are generally two categories, one is the inhibition of estrus preparations, is a progesterone substances, such as progesterone, medroxyprogesterone, megestrol, norethindrone , Chloride progesterone, progesterone, 18 methy norethindrone, etc., which maintain a certain level in the blood, can inhibit the growth and development of follicles. The other are gonadotropins that are used in combination with the above drugs, such as follicle stimulating hormone, luteinizing hormone, PMSG, and HCG, and gonadotropin releasing hormone (GNRH) that promotes the release of endogenous gonadotropins. The use of these hormones is to promote the growth and maturation of the follicles and ovulation, to achieve a higher degree of synchronization of ovulation ovulation, and improve the conception rate. 2, the same time the treatment of estrus: The most commonly used is vaginal embolism. Take a piece of foam and pry it on a thin line. The other end of the line leads outside the anus and it is easy to pull out at the end. The foam is immersed in a progestogen preparation solution (mixed with vegetable oil), stuffed with a long handle to the outside of the cervix, and left for 14 to 16 days. The intramuscular injection of PMSG 400-700 international units that day, 2 to 3 days after the majority of ewes were processed estrus, the day of estrus and the next day each insemination. 3, drug types and reference dosage: medroxyprogesterone 40 ~ 60 mg, megestrol ketone 40 ~ 50 mg, 18 megestethonone 30 ~ 40 mg, clomazone progesterone 20 ~ 30 mg, chlorprogesterone 30 ~ 60 mg, progesterone 150-300 mg. 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How to Increase the Number of Small Tail Han Sheep's Annual Births Published: 2008-5-16 0:14:11 Hits Viewed: 32 times I. Scientifically arrange breeding Print this page |
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How to increase the annual production of small tail Han sheep