From 1954, China has successfully cultivated the first fine-wool sheep breed, Xinjiang Fine-wool Sheep, for more than 40 years. For decades, China's fine-wool sheep breeding industry has made great progress. The production level and production scale of fine-wool sheep have also been greatly improved, and a complete scientific research, breeding, and production system has been established for the fine wool sheep industry in China. Continued development laid the foundation. However, in recent years, due to the general economic benefits of feeding fine wool sheep, the majority of second- and third-tier sheep farms have relaxed the management of fine-wool sheep improvement work. In particular, some individual contractors have begun to pay back with local rams. The painstaking efforts of people for decades will be destroyed, and the status of domestic fine wool will be in jeopardy. To save this situation, we must fundamentally improve the economic benefits of feeding fine wool sheep. There are many reasons for the economic benefits of fine wool sheep. We believe that an important factor is that the fine-wool sheep have a low reproductive rate. Therefore, we must pay enough attention to improving the reproduction rate of fine-wool sheep. To increase the reproductive survival rate, we must first increase the lambing rate of fine wool sheep. There are many ways to increase the lambing rate, such as the introduction of multiple fetal genes, the use of double lamb and so on. In order to fundamentally achieve prolificacy, we must start from the point of view of genetics and introduce multiple fetus genes. Hu sheep is a good variety in China. Multiple births are the most significant characteristics of Hu sheep. The multiple traits of Hu sheep are the genetic traits controlled by the gene and can be inherited stably to offsprings (Xinjiang, China). )], The average lambing rate is 234% [Sheep Science]. Although the coat hair is heterogeneous, it is white, no colored hair is present, and it is similar to the fine wool color. It does not cause wool color change after introduction. . Huyang has the advantages of resistance to rough feeding and rapid growth. After 4 years of shearing, the sheep is grazing and grazing in summer pastures. It can grow 15 to 20 kilograms and its absolute weight gain is 35 to 45%. It can grazing in four seasons and make full use of natural grassland. . The average lambing rate of the Chinese Merino sheep (Xinjiang type) is about 125%, and the lambing rate of the Hu sheep is twice as high. It is of great potential to use it to increase the reproduction rate of fine wool sheep. From 1988, Gong Naisi Sheep Breeding Farm started to introduce sheep breeders with Chinese merino sheep (Xinjiang type) second- and third-order ewes under the guidance of experts from the Xinjiang Academy of Animal Science and Animal Husbandry in 1988. Formally established a research project on "the cultivation of multiple types of Chinese Merino sheep (Xinjiang type)", and in May 1996, passed the appraisal and acceptance of the Xinjiang Science and Technology Commission organization, marking the success of the introduction of multiple genes for Hu sheep. The multiple types of Chinese Merino sheep in the Gongnaisi sheep farm in Xinjiang belong to the late spring lamb. Four seasons are dominated by natural grazing. Winter snow is thicker or when spring grasses are not germinated, each sheep is given 80 kg of wild hay and 60 kg of concentrate (mixture of self-produced corn); in late May, shearing and medicinal bathing In early June, they drove to the alpine summer pastures 100 kilometers away for grazing, where the plants were lush and the sheep recovered quickly. In early October, they drove away the spring and autumn pastures near the backyard. At this time, the pastures were completely dry. At the same time start breeding. In mid-December, it was transferred to the winter pasture and grazing until spring and autumn pastures when it was born in late March. Lambs were weaned until 120 days of age. Under the conditions of such rearing and management, the production performance of the multiple types of Chinese Merino sheep (Xinjiang type) is as follows: The lambing rate of the producing ewes averages over 190%; the lambs at the weaning weight of the lambs at 120 days are male and female. An average of 29 kilograms; aged ram weight 54 kg after shearing, ewes 35 kg; adult ram weight 90 kg after shearing, adult ewes for 44.5 kg; wool is a homogeneous fine wool, hair length 9 cm, fine Degree mainly to 64, bending, oil white or white milk sweat, wool production adult ram 5 kg net, 2.5 kg of adult ewes, 2 kg of ewe. China's Merino sheep (Xinjiang type), a multi-type fine-wool sheep (hereinafter referred to as "multi-type fine-wool sheep"), is a high-yielding species, but it must adopt appropriate feeding and management measures to fully meet its various stages of nutritional needs in order to fully realize its production. Ability to increase the survival rate of fine wool sheep. The following measures should be taken for the rearing of multiple-wool fine-wool sheep: 1. Feeding and management of multiple-feather fine-wool ewes should be conducted during the breeding and lamb-raising period, and the feeding and management of breeding ewes should be strengthened to provide them with sufficient full-price nutrition. 2. Lamb feeding and management Lambs must be carefully cultivated within 10 days after birth. It is important that lambs should be able to eat colostrum in time. Lambs with more than three lambs and lack of milk should be fed on behalf of the lambs and artificially assisted breast-feeding in order to enhance the body's resistance and speed up. Its early development. 3. Do a good job of protecting livestock and fetuses. 4. Strengthen the management of breeding rams. Multi-type fine-wool sheep have strong fertility, multiple births, and management are more resistant to extensive, fast growth and development, meat tender and fragrant, very popular with local farmers and herdsmen. The successful breeding of multiple litter fine-wool sheep provides an effective way for the use of multiple-fetal genes, improving and improving the production performance of low-yielding sheep herds, further breeding and improvement, establishment of multi-type breeding bases, and laying a foundation for adapting to market demand. The use of multiple-types, the only breed of fine wool sheep in China with high reproductive performance, will play a role in the rapid increase in the number of fine-wool sheep; the successful breeding of multiple-typing types has fundamentally changed the situation in which the economic benefits of rearing fine-wool sheep are low. , Using its fast growth and good meat production performance to improve the reproduction ability of low-grade fine-wool sheep, to develop mutton production, and to increase the economic efficiency of fine-wool sheep by means of stabilizing and increasing meat, and to prevent fine wool sheep from “reversing†and keeping The achievements of breeding and improvement in China for decades will have far-reaching consequences.
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