Many sheep farmers are particularly concerned about the reproductive problems of sheep. Modern meat sheep pursues high-quality characteristics such as early maturity, multiple births, fast growth, and good meat quality. Through research in breeding, hormones, nutrition, etc., there are several ways to improve fertility:
Strengthen breeding and matching
1. Breeding of rams: Choosing rams from the offspring of the highly fertile ewe. Requires physical appearance standards, robustness, good testicular development, male characteristics and detection and elimination of rams that do not meet the requirements through measures such as semen quality inspection and descendant identification;
2. Ewe selection: Choose excellent individuals from the offspring of multiple ewes, pay attention to their lactation and lactation performance, and choose to keep multiple ewes according to their families.
The use of multiple-fetal genes to introduce multiple breeds and to cross with local breeds is the fastest and most effective and simplest method to improve fertility.
Reproductive technology control
1, estrus control: 1 lamb early weaning, is conducive to the implementation of two-child technology; 2 hormone treatment: first early weaning of the lamb, and then treated with hormonal ewes for about 10 days, after stopping the injection of pregnant horse serum, promote Gonadotropin (rmsg), can cause estrus and ovulation; 3 vaginal sponge method: the sponge impregnated with progesterone is placed at the mouth of the cervix, treated for 10-14 days, after stopping the injection of pregnant horse serum gonadotropin 400 ―500iu, can start estrus in about 30 hours, estrus on the same day and the next day, each insemination; 4 prostate hormone method: the prostaglandin into the uterus after a few days after the end of estrus, intramuscular injection, can be within 2-3 days Cause the ewes to estrus.
2, superovulation: 4 days before the arrival of estrus ewes, intramuscular or subcutaneous injection of pregnant mare serum gonadotropin 600-1100iu, appeared after the onset of breeding lines, and in the day intramuscular or intravenous injection of human chorionic gonadotropin (hcg ) 500-750iu, the egg can be discharged.
3, production induced twins, multiple births: â‘ aphrodisiac feeding method: in the month prior to breeding; â‘¡ double or twin lambs factors: There are two kinds of agent and oil, a liquid product 5 to the front mating ewes In the neck and 2 weeks, the neck was injected subcutaneously with 1 ml/head; the oil product was injected intramuscularly 2 ml/mouse 2 weeks before the breeding.
4, insemination using advanced technology to improve conception rate.
Friends of breeding sheep, with so many breeding sheep, will greatly improve economic efficiency! Huinong School has more relevant agricultural technology knowledge, and continue to pay attention to the Hui Nong School to answer questions during your breeding process.
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