After 2 months of pregnancy, with the increase of pregnancy months, the fetal development of ewes is gradually accelerated, and the feeding amount of supplementary concentrate should be gradually increased. 40% of soybean, 30% of corn, 20% of barley and 0/0% of wheat can be soaked in warm water for 6-8 hours, ground into slurry, and then bean cake, bran and bran are added. , equivalent to 10%~ 15% of the total soybean feed. A lot of energy feed should be avoided in the first two months of pregnancy. Too much energy feed is easy to lead to fetal oversize, which is an important reason for dystocia of ewes. Two months after pregnancy is the key to fetal development, so more protein feed should be added to realize the development of lamb bones. If the sheep is paralyzed before and after delivery, calcium and phosphorus can be supplemented. Note: Calcium and phosphorus should be supplemented at the same time. After three months of pregnancy, ewes should properly control the total amount of feed fed by pregnant sheep, and feed less supplementary feed and concentrate to prevent excessive feeding at one time from affecting the normal growth and development of the fetus.
After four months of pregnancy, the fetal weight has reached 60% ~ 70% of the lamb birth weight. At the same time, ewes should store certain nutrients for postpartum lactation. Generally, at this stage, the fetus is attacked and supplemented, and the amount of concentrate should be increased to about 2 times before pregnancy. Forage and supplementary concentrate should be fresh and diverse, and green and juicy feeds such as tender grass and carrots can be fed more. It is forbidden to feed potatoes, distiller's grains, cottonseed cakes or rapeseed cakes that have not been detoxified, and feed that is spoiled, too cold or too hot, too acidic or mixed with ergot and poisonous weeds (such as bone-seeking wind). ), so as to avoid ewe abortion, dystocia and postpartum diseases.
The pregnant period of ewes is generally about 5 months, which can be divided into two periods according to their development: pre-pregnancy and post-pregnancy. In the early stage, ewes grow slowly, and their weight gain is generally only110 of newborn lambs. Therefore, the demand for nutrition will be greater, so compared with the air, it is necessary to improve nutrition appropriately at this time. Early ewes have strong digestive ability and are suitable for roughing. You can feed some hay properly, but you must ensure that the ewe is pregnant for two months and enters the third trimester. In the third trimester of pregnancy, the sheep fetus grows rapidly. Generally, 4/5 of fetal sheep's weight is in the last two months. Therefore, if ewes lack nutrition in the third trimester of pregnancy, there will be various unhealthy phenomena such as low birth weight, poor physiological function and poor body temperature regulation. , will lead to lamb dysplasia, lamb growth ability decline, lamb poor physique.