There are shortcomings of the "two drops and one high" in the mating of sheep. Namely: the breeding performance of the sheep declines, the variety is degenerate, the growth is not good, the growth is slow, the meat production is reduced by 50%; the reproduction rate is decreased, the freak, abortion, fetus, and stillbirth appear constantly; the sheep has poor disease resistance and high mortality. . These problems must cause the sheep farmers to attach great importance to take measures to seriously solve them.
The first is to exchange rams in due course. After two years of continuous use, the rams of a flock are exchanged with the same species of rams in other flock to avoid inbreeding.
The second is to breed rams separately. In the mating season, rams with distant ties are used for breeding.
The third is the production of lamb lambs 45-60 days old after castration.
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