The appropriate body condition for male and female ewes feeding on male and female rams should be medium-upper lyrical. Therefore, generally 1.5 to 2 months before breeding, feeding and management should be strengthened, and more protein, vitamins, and minerals should be fed. Rich feeds, especially high-quality green fodder, and green fodder can effectively promote estrus in ewes and increase ovulation, and can also enhance the vitality of male rams. Thin sheep are late in estrus and ovulate less, but too much fat can affect their ovulation, even infertility.
Choosing the most suitable age for breeding ewes 3-5 years old is the period with the strongest reproduction rate. There will be more babies born with double lambs and more lambs. At the age of 7-8, the reproduction rate will gradually decline, and the estrus will stop when it is 10-15 years old. Therefore, it is necessary to seize the breeding breed during the 3-5 year old period. Pay attention to the timely elimination of the old weak ewes, and more to raise some of the young ewes, the best breeding age for rams is 2-6 years old.
Seize the opportunity to timely breeding ewes in northern China began in the first year of August, the end of the second year in February and September to November the most. At this time, the ewe's libido is strong, and it is easy to be affected by the fetus. It is the best season for breeding. The ewes start estrus in the evening, ovulate 24-36 hours after estrus, maintain fertilization capacity within 5-6 hours after ovulation, and sperm enter the uterus and become fertilized. The ability to maintain 24-48 hours, therefore, 12-24 hours after estrus breeding ewes higher rate of conception. At the same time according to the age of the ewes according to the old with early, less with the late, not many with the middle of the principle of adjusting the breeding time.
In order to increase the conception rate and the number of litters, they can be bred in the middle and late stages of estrus, and mating with 2-3 rams during one estrus period can also significantly increase the conception rate and lambing rate.
Strengthening post-pregnancy management The main purpose of post-pregnancy management is to reduce stillbirth, prevent miscarriage, improve the quality of lambs, and improve post-natal survival. Especially in early pregnancy and during pre-natal periods, it is particularly important to strengthen feeding management.
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