The colostrum period of lambs is from birth to 10 day, and colostrum is the main food. Lamb10 ~ 40 days old is lactating, and the staple food is lactating and a small amount of forage. 40 ~ 80 days old, have learned to eat grass and feed, and food should pay equal attention to milk. When weaned at 80 ~120 days, forage is the main material.

2. Growth period

It is necessary to make large use of coarse fodder such as green hay, and when conditions permit, it can be grazed all day and supplemented with a small amount. In the cultivation, we should guard against the influence of short and stout body, deep chest and thick meat on the milk production performance in the future.

3. Pregnancy

The quality of feeding pregnant ewes directly affects the growth and development of the fetus and the postpartum milk yield. Feed rich in protein, minerals and vitamins must be provided, and it is not too big and easy to digest.

4. Dry milk period

The dry milk period is in the late pregnancy of ewes, and the fetus develops rapidly and gains weight rapidly, which requires a lot of nutrition. At the same time, due to long-term lactation, the body consumes too much nutrition and needs to be restored. It is necessary to store some nutrition in advance to lay the foundation for postpartum milk production. Generally, it can be carried out according to the daily milk production1~1.5 kg lactating ewe feeding standard.

5, lactation period

(1) Early lactation

Early lactation refers to within 20 days after delivery. This period should focus on restoring physical strength. Give digestible high-quality hay within 5 ~ 6 days, and feed a small amount of concentrate as appropriate. After 6 days, silage or green juicy feed was gradually added, and after two weeks, it returned to normal concentrate. The amount should be given appropriately according to the ewe's physical condition, breast swelling degree, appetite performance and fecal status, and should not be rushed.

(2) peak lactation period

Refers to 20 ~120 days after delivery. The milk production in this period accounts for more than half of the whole milk production, and milk production is the main task, so we should try our best to raise the milk production. During this period, ewes, especially high-yield sheep, could not make ends meet, so they must be carefully fed, with high quality and sufficient nutrition. They should also choose the right time, feed more lactagogue feed and lactagogue in time to increase milk production. That is, on the basis of the original feed standard, advance concentrate is increased in advance to induce ewes to milk more. It is usually carried out about 20 days after delivery, which affects physical recovery too early and milk production too late. Diets should contain15% ~17% cellulose, and hay should be fed evenly every day. The lactation peak of high-yield sheep is often out of sync with feed intake. Generally, the lactation peak comes earlier and the feed intake peak lags behind. We must pay attention to the feeding during the dry milk period, so as to ensure that the prenatal feed is rich, the postpartum feed is bold, and the feed is properly matched, which requires good palatability, small size, high nutrition, various types and complete nutrition.

(3) stable lactation period

Refers to postpartum120 ~ 210 days. During this period, the milk yield decreased gradually, while the food intake increased, and the body began to regain its weight. We should try to avoid changes in feed, feeding methods and work schedule, keep feeding relatively stable, and keep high-yield milk for a long time.

(4) Late lactation

Refers to postpartum 2 10 days to dry milk. Affected by estrus and pregnancy, milk production decreased significantly. The reduction of concentrate in this period requires that the decline rate of milk quantity be slowed down after the decline of milk quantity. This period is the first three months of pregnancy. Although the fetus does not gain weight quickly, it requires full nutrition.

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