Farmers are accustomed to keeping rams and ewes together for free mating. This has many harmful effects.
Polyculture is not conducive to grasping the best breeding time
Rams and ewes mixed and bred, will inevitably be free to mate, may lead to ewes pregnancy and lambing throughout the year, is not conducive to feeding and management, but also not conducive to fetal development, the output of the lamb is often poor physique, survival The rate is low.
In comparison, ewes produce better lambs in spring and winter, and winter lambs are better than lambs in spring. Lamb winter ewes are generally pregnant from July to August, when the grass is lush, the ewes have good lyrics, there is more ovulation, the conception rate is high, and the fetus grows well; when the lambs are weaning, they are catching up with the warming, and the sheep can eat. On the grass, the growth and development are fast, the wintering ability is strong, the survival rate is high, and the shearing amount is high. Therefore, it is usually best to separate the rams from the ewes, and to mate with the ewes in the selected ram between July and August. This will ensure that the ewes will breed lambs between December and January. If the ewes produce lambs in the spring, the ewes and lambs can eat grass when the weather gets warmer, so the ewes have enough milk, the lambs grow fast, and there is no need to purchase large amounts of feed, and the cost is low.
Polyculture is not conducive to grasping the best breeding object
Sheep usually mature 7-8 months of age, but at this time is not suitable for breeding, in addition to old sheep and sick sheep are not suitable for breeding, only 1 year and a half to 7 years old healthy sheep are suitable for breeding. If the ram and the ewes are polycultured together and freely mated, then the old and sick, sick sheep and young sheep will become pregnant. This will not only seriously affect the treatment of old, weak, sick and dead ewes, but also the survival of the lambs they produce. The rate is low. Even if it survives, it grows slowly.
Polyculture can not make full use of improved rams
A ram can only mate 15-20 ewes. If male and female rams are freely mated, they will inevitably be inefficiently mated. Excessive repeated mating will cause the rams to consume too much energy, shorten the useful life, and cause waste.
Polyculture can easily lead to unclear offspring of blood
Freedom of mating is often not sure which lamb is the father of the lamb, resulting in near mating of offspring, loss of hybrid superiority, and genetic disease.
Polyculture affects normal feeding
The rams and the ewes are mixed together. The rams will chase the ewes so often that the sheep will not be at peace. The ewes cannot concentrate on feeding, thus affecting the growth and development of the ewes.
Polyculture is not conducive to grasping the best breeding time
Rams and ewes mixed and bred, will inevitably be free to mate, may lead to ewes pregnancy and lambing throughout the year, is not conducive to feeding and management, but also not conducive to fetal development, the output of the lamb is often poor physique, survival The rate is low.
In comparison, ewes produce better lambs in spring and winter, and winter lambs are better than lambs in spring. Lamb winter ewes are generally pregnant from July to August, when the grass is lush, the ewes have good lyrics, there is more ovulation, the conception rate is high, and the fetus grows well; when the lambs are weaning, they are catching up with the warming, and the sheep can eat. On the grass, the growth and development are fast, the wintering ability is strong, the survival rate is high, and the shearing amount is high. Therefore, it is usually best to separate the rams from the ewes, and to mate with the ewes in the selected ram between July and August. This will ensure that the ewes will breed lambs between December and January. If the ewes produce lambs in the spring, the ewes and lambs can eat grass when the weather gets warmer, so the ewes have enough milk, the lambs grow fast, and there is no need to purchase large amounts of feed, and the cost is low.
Polyculture is not conducive to grasping the best breeding object
Sheep usually mature 7-8 months of age, but at this time is not suitable for breeding, in addition to old sheep and sick sheep are not suitable for breeding, only 1 year and a half to 7 years old healthy sheep are suitable for breeding. If the ram and the ewes are polycultured together and freely mated, then the old and sick, sick sheep and young sheep will become pregnant. This will not only seriously affect the treatment of old, weak, sick and dead ewes, but also the survival of the lambs they produce. The rate is low. Even if it survives, it grows slowly.
Polyculture can not make full use of improved rams
A ram can only mate 15-20 ewes. If male and female rams are freely mated, they will inevitably be inefficiently mated. Excessive repeated mating will cause the rams to consume too much energy, shorten the useful life, and cause waste.
Polyculture can easily lead to unclear offspring of blood
Freedom of mating is often not sure which lamb is the father of the lamb, resulting in near mating of offspring, loss of hybrid superiority, and genetic disease.
Polyculture affects normal feeding
The rams and the ewes are mixed together. The rams will chase the ewes so often that the sheep will not be at peace. The ewes cannot concentrate on feeding, thus affecting the growth and development of the ewes.
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