Experience of improving the fecundity of Organic Sheep

Different breeds of organic sheep, differences in nutritional conditions, temperature and age will affect their fecundity and economic benefits. This paper mainly introduces the measures that should be taken to improve the fecundity of organic sheep.

The measures that should be taken to improve the fecundity of organic sheep: different organic sheep breeds, different nutritional conditions, temperature and age will affect their fecundity and economic benefits. What measures should be taken to improve the fecundity of organic high sheep?

First, hybridization promotes multiplicity. It is the fastest, most effective and easiest way to improve fecundity by introducing multiple varieties and crossing them with local varieties. The introduced excellent meat prolific products of various rams were crossed with domestic fine breeds of small tail Han sheep, Hu sheep, Chinese Merino, northeast fine wool sheep, etc., to improve the fecundity of local sheep.

Second, choose more lambs to breed sheep. The lambing number of ewes is affected by heredity, and ewes bred by twin lambs are more likely to give birth to twin lambs. Selecting the offspring of ewes with more than two lambs for breeding is an important way to improve the fecundity of organic sheep.

Third, cultivate prolific varieties. More breeding ewes with early maturation, high lambing rate, annual oestrus, strong lactation performance, good motherhood, strong lambing rate and strong disease resistance, as well as rams with fast growth rate, high feed utilization rate, strong adaptability and good carcass quality.

Fourth, improve the nutrition of sheep. Improving the nutritional status of rams and ewes is an effective way to improve the fecundity of sheep. When the ewes are fattened throughout the year, the ewes are not only neat in estrus, but also increase the number of ovulations, and the short-term optimal feeding of ewes before mating can increase the number of lambs. The nutrition level of breeder ram also had an effect on conception rate, lambing rate, birth weight and weaning weight. When the male and female were fed with full-price nutrients, the conception rate and lambing rate were high, and the birth weight of lambs was also high.

Fifth, keep more ewes of appropriate age. Ewes account for more than 60% of the flock, which is an important way to improve the fecundity of the flock. If the proportion of Capricorn sheep (that is, castrated rams) is too high, it is not conducive to improve the fecundity of the flock. Although Capricorn sheep can be sheared, they should be slaughtered in time after autumn fattening, otherwise their weight will drop significantly after winter, resulting in a waste of forage and labor, which is very uneconomical. If the ewe has a large proportion and can reproduce more ewes, it can improve the fecundity of the flock, expand reproduction and increase economic benefits. The old ewes after 7 years old should be gradually eliminated according to the situation, and the young ewes should be replenished every year, so that the number of ewes of the right age will continue to expand.

Sixth, strengthen feeding and management. ① breed ram. The supplementary feed for the breeder ram should be easy to digest, small in size, good in quality, good in palatability, less coarse and more juicy, but more concentrated, so as to make it physically strong, energetic, libido and in good condition. In addition, each breeder ram should be fed with 10 grams of calcium phosphate every day, which has an effect on sperm production and motility. ② ewe. Reasonable feeding can ensure the normal estrus of sheep, improve the conception rate and lambing rate and the health of lambs. Early pregnancy (about 3 months), generally do not need supplementary feeding, to two months after pregnancy, the fetus grows fast, it is appropriate to add concentrate. Adequate exercise is needed during pregnancy, which is good for ewe health and fetal development. Feed must not have frost, mildew, avoid drinking ice water or super-cold water. Attention should be paid to the nursing work of sheep during lambing.

Seventh, early weaning induces estrus. The use of artificial milk and artificial lambing techniques for early weaning of lambs can shorten the lactation period of ewes and make ewes come into estrus earlier. During the anestrus period of ewes, the use of hormone and biological treatment and other measures to cause normal estrus and mating, shorten the reproductive cycle of ewes, and improve the fecundity of sheep. First, the lambs were weaned early, and then the ewes were treated with progesterone. After stopping the drug, the pregnant horse serum gonadotropin (a glycoprotein hormone) 600-1100 international units was injected subcutaneously, which can cause estrus and ovulation, adjust the light cycle and shorten the daytime to achieve the purpose of oestrus and ovulation. Before the normal breeding season, the rams and ewes should be mixed to advance the mating season and shorten the time from postpartum to ovulation so as to improve the fecundity of ewes.

Eighth, eliminate inferior ewes. The infertility of ewes in the first year should be examined to find out the causes and overcome them. If you are still infertile in the second year, you should be eliminated. Ewes that give birth to dead lambs in the first year also have a high proportion of dead lambs and should also be eliminated.

The above is for you to introduce the methods to improve the fecundity of organic sheep, I hope this breeding technology can help you.