1, free mating. For the simplest way of mating. During the breeding period, according to the number of ewes, the selected rams can be placed in the ewes for free quest to find estrus for mating. This law saves time and labor, and is suitable for small groups of dispersed production units. If the proportion of male and female sheep is appropriate, a higher conception rate can be obtained. The disadvantages are: 1 can not control the lambing time; 2 ram chasing ewes, unlimited mating, no peace of mind to eat, expend energy, affect health; 8 rams chase across the ewes, affecting the ewes feed intake; 4 Unable to grasp the mating situation, the ancestry of the offspring is unknown, it is easy to cause mating or early mating, it is difficult to implement the plan matching; the utilization rate of the five kinds of rams is low, and can not play the role of excellent ram. In order to overcome these shortcomings, male and female mutton must be grouped and grazing in the non-mating season. If they are free mating during the breeding season, they can put the ram in the ewes group at the ratio of 1:25 and separate the rams at the end of breeding. Every year between the groups and groups, there must be a planned exchange of rams to exchange pedigrees.
2, artificial assisted mating. Artificially assisted mating is to segregate the male and female hens for isolation and grazing. During the mating period, the male and female rams are used to test their affections and the male and female sheep are mated. This mating method can not only improve the utilization rate of the ram, increase the useful life, but also can be matched in a planned manner to improve the quality of future generations. Mating time, usually early in the morning when the ewes mate mating, ewes in the afternoon or evening estrus mating the next morning. To ensure abortion, it is best to repeat the mating once every 12 hours after the first mating.
3, artificial insemination. Artificial insemination is the use of equipment, to take the ram's semen, after semen quality checks and a series of treatment, and then the semen into the estrus in the genital tract, to achieve ejaculation fetal breeding methods. Artificial insemination can improve the utilization rate of excellent male rams, which is several times higher than that of bred hens, saving the cost of raising large numbers of rams, accelerating the genetic progress of herds and preventing the spread of diseases.
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