Empty period
The interval between the stage of sexual maturity of the ewes and the success of breeding or the success of lamb production to the next breeding is called the empty period. The key point of this stage of ewes breeding is to prompt the ewes to quickly recover their body condition and regain their strength. Prepare for mating. The species of ewes are mainly fed with green roughage, and the feeding time is prolonged. The daily amount of mixed concentrates may be increased or the amount of high quality roughage fed may be increased, generally 0.3 kg to 0.5 kg, prompting rapid recovery of the body condition. Make sure to breed normally. We must try our best to keep a balanced breeding of ewes throughout the year, especially in the cold season, so as to maintain good body condition and facilitate breeding. At this time, in addition to doing a good job of feeding and management, we must also adjust the breeding condition of the flock, eliminate ewes with poor lactation performance, poor growth and development, and old-age ewes, and choose to have good motherhood, high lactation, and lots of litters. ewe.
Timely breeding
Ewes usually reach sexual maturity from 4 months to 8 months of age, usually when the ewes are close to the weight of adult ewes. The ewes are suitable for mating at 12 months of age. For early maturing species, if the breeding and management conditions are good, the ewes can be mated early. The general selection of breeding is carried out in the spring and autumn. The best breeding time is from October to November. When ewes are selected for breeding, they must avoid inbreeding to prevent the same insufficiency of the breeder sheep, which would result in a decrease in the performance of the offspring lambs.
Pregnancy
Pregnancy. That is, during the first 3 months of gestation, the fetus has a slower growth and development of the fetus. The supply of nutrients and nutrients can be basically the same. Therefore, it is possible to carry out the rearing in accordance with the requirements of the empty period. keep great. In summer, the breeding ewes are mainly fed with green grass. Whether or not they feed the concentrate is determined according to their lyrical conditions. Feeding of musty or deteriorated fodder is forbidden; in winter, the green forage grass is lacking and the main feeding is straw. Its nutritional value is reduced. To meet the nutritional needs, it is necessary to supplement the amount of concentrate, usually 0.5 kg to 1 kg per day. It is forbidden to feed frozen fodder and frosty grass, and not to drink ice and water to prevent miscarriage. In day-to-day management, the focus is on fetal protection, controlling exercise and preventing miscarriage.
Late pregnancy. This stage is an important period and main link in the breeding and management of breeding ewes. At this time, the rearing management not only affects the growth and development of the fetus, the constitution of the lamb, the birth weight, and the subsequent development and production performance, but also after delivery to pregnant ewes. The effect of lactation performance. The key to rearing and management of ewes during the second trimester of pregnancy is to protect the fetus and grasp fleas. It is necessary to fully meet the nutritional needs of pregnant ewes so that their sensation is maintained well and the rate of weight gain is satisfactory. Strengthening the fetus, especially during the last two months of pregnancy, The size of the fetus is large and the ewes are slow to prevent crowding during feeding and entering and leaving the sheep house, so as to avoid miscarriage; maintaining a good living environment; keeping the insulation of the house in the winter and postponing it to the outdoors in the morning and prohibiting feeding. Hawthorn and frosted forages are used to supply warm water; in the morning and evening, they are fed in the morning and evening to build pergola, strengthen ventilation, provide sufficient drinking water, and avoid heat stroke; reasonably arrange the density of livestock to avoid overcrowding; maintain environmental sanitation and strengthen disease prevention and control; Found that the disease should be treated promptly.
Breastfeeding
In the first 2 months after the lamb's birth, the lamb mainly gains nutrition through breast milk. At this time, it is important to ensure that the ewes maintain a high level of milk production so as to meet the nutrients needed for the growth and development of the lamb. At this stage of the ewes, under the premise of strengthening grazing, but also according to the amount of lactation and the number of lambs, reasonable feeding. If the ewes have good postpartum body condition, supplementation may not be carried out within 1 to 3 days after delivery to prevent mastitis or indigestion. For ewes with double lambs or multiple lambs, 0.5 kg to 1.5 kg of mixed concentrate is supplemented every day; for single lambs, 0.3 kg to 0.5 kg are replenished daily. Ewes can feed a small amount of laxative feed after delivery, such as adding a small amount of wheat bran to warm water to feed sheep, regulate their digestive function, and promote the discharge of lochia. After 3 days of ejaculation, the amount of concentrate feed should be gradually increased. At the same time, some green and juicy feeds and high-quality green hay should be fed to promote the normal function of lactation.
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