Breeding multiple sheep with improved sheep
Multi-feet with Sheep's appearance characteristics The multiple fetus and the sheep have strong physique, large physique, well-proportioned structure, and rectangular shape in side view. Long head and neck, micro-long nose, large and drooping ears, sagging, rams have a small angle, slightly outward corners, about half of the ewes have a small short-horned or chestnut-shaped angle; slightly narrower forequarters, a little armor High, medium-length, long back, well-developed hindquarters, high cross; strong and high limbs, firm footed; short fat tails of different sizes and shapes, more common in round tail and square tail (92% ), and small round tail and triangular tail, etc., tail ditch are not obvious, some only found in the upper 1/3 of the tail, tail tip upturned or slightly drooping; body hair is pure white, only part of the individual eye, There were rare variegated hairs and spots on the ears, nose, mouth, and face. The lower parts of the face and limbs were covered with bristles. The abdominal hair was better. Only a few individuals were poor, and a few bristles covered. It can be seen that the appearance of multiple births and sheep is basically similar to that of the original species, and it also combines some of the appearance characteristics of the Little Tail Han sheep. Basic features The precocious puberty of the multiple births with the sheep is good, and the weight of the male and female hens is 88%-91% of the annual weight of the sheep. The rams are also significantly higher than the ewes. Under excellent nutrition and management conditions, the weight of adult rams was 85.6 kg, that of adult ewes was 56.2 kg, and that of male and female ewes were 76.6 kg and 49.4 kg, respectively. The main body size was measured on 28 ewes aged from 7 months to 11 months. The main body measurements were (XS); body length was 67.77 (2.7638 cm), body height was 68.14 (3.8750) cm, and chest circumference was 74.73 (4.4607) cm. The tube circumference is 7.58 (0.6056) centimeters. The two bred rams had an average body length of 75.0 cm, a body height of 78.0 cm, a chest circumference of 82.0 cm and a tube circumference of 8.0 cm. Meat production performance The average slaughter rate of sheep aged 1 to 1 year and a half was 58.5%, the net meat rate was 49.0%, and the ratio of meat to bone was 4.8 to 1. The slaughter rate of fat lamb was 50.6%. The wool production performance was determined, and the annual output of adult male and female ewes was 2.6 kg and 1.5 kg respectively; 86.0% of the individuals with homogeneous and basic homogenous semi-fine hairs were present, and some individuals had a small amount of normal hairs and stems in the hairs. For dead hair, the average fineness of wool was 26.2 cm (58 sticks), the annual hair length was 13.1 cm or more, and individuals with medium or higher hair densities accounted for 96.4%, and individuals with normal bending, evenness, and oil sweat accounted for 92% of the total; The average hair rate was 73.3%, and normal and good abdominal hair accounted for about 93%. Reproductive performance Multiple fetuses Sexual maturity 5 months to 6 months of age, estrus duration 1 day to 2.5 days (24 hours to 60 hours), the average period of gestation is 145 days to 152 days, the lambing rate is more than 200% ( Individual small groups amounted to about 280%); the survival rate of lambs was more than 86%; ewes were basically estrus and breeding throughout the year, with spring lambs and autumn lambs as the majority; most sheep had three babies for two years, and a few had good nutrition With an annual output of two children, the fertility is more than 1 times that of the original species. Adaptable multiple-feet sheep showed good adaptability under various ecological conditions in the semi-humid and drought-prone areas of production areas and in the central and northern regions of China. Can not only feed, but also grazing, grazing walking performance is far better than the small tail Hanyang; resistance and disease resistance is strong, the masses praised the prolific sheep, very well maintained, fast growth, good meat, fur Excellent, rapid breeding cycle, high economic efficiency. The multi-use value of breeders and sheep is of higher value. The ratio of the special and first class in the group is 82.86%, and the appearance of the body is consistent; it combines the high quality meat, wool, lambs and adaptability of the same sheep and the growth of Small Tail Han sheep. The excellent characteristics of rapid development and multiple births are hereditary and stable. Irrespective of self-reproduction or hybrid offspring, they are superior in body shape, coat, meat production, and reproduction performance, and are also precious female parent materials for breeding new varieties of mutton sheep. Promotion and utilization The above-mentioned advantages of multiple-child-to-gom have made it popular among farmers for more than 10 years. At the same time, its price is 1/3 to 1/2 lower than that of the Small Tail Han sheep that are sold throughout the country. Therefore, it is even the main production area of ​​Small Tail Han Sheep. Some people in Shandong and Henan have also been rushing to buy multiple babies and sheep. Some have impersonated their lambs and sold them at high prices in the local area to make huge profits. In addition, there are from the Northeast, Inner Mongolia, Shanxi, Hebei, Anhui and the northwestern provinces ( District) The sheep purchasers also introduced multiple births with the sheep as the parent material for the cultivation and production of new varieties of sheep. According to incomplete statistics, there are more than 60,000 multi-feathers and goats that have been exported to various places. The multi-feather and the sheep have shown strong superior adaptability and breeding value to the same sheep and Small Tail Han sheep under different ecological conditions. Benefit estimation Due to the multiple births of multiple births and sheep, the vast majority of sheep are only reproductive for two years and three births, of which about one third can produce two children each year. In this way, the output value of one multiple birth relative to that of the sheep or the local All kinds of hybrid goats should be 1 to 1.5 times more expensive. Each year, they will receive more than 1,000 yuan of economic benefits, and the total benefit will be more than RMB 250 million for more than ten years. The economic benefits resulting from the introduction of multiple-combined sheep in all regions will increase. Social benefits have reached at least 1 billion yuan, which has played an important role in the development of China's mutton sheep industry. Main technical measures Breeding bases were established to strengthen the breeding of breeding sheep. Based on extensive investigations and research, the author successively determined that Heyang, Chengcheng, Pucheng, and Baishui counties were selected as the key breeding bases, and each site was equipped with 2 breeding sites. (including the original Baishui County Sheep Farm). In 2004, following the revision of the original “Multiple-to-feet Individual Phenotype Appraisal (Trial) Standardâ€, the author carried out sampling selection in combination with production links in the spring and autumn each year to identify the basic groups and the elected offspring, and to strengthen breeding, to clarify the offspring of the parents. The pedigree content was compared with the comprehensive quality of 1/4, 1/8, and 1/16 of the Little Tail Han pedigree. The final population with 1/4 Small Tail Han sheep ancestry was the best, followed by 1/8, 1/ 16 groups are not ideal. In the existing group of multiple-feathers and sheep, the gene containing 1/4 of the Han sheep is mainly composed of 1/8 individuals. Formulate procedures for raising and managing the farm, point to demonstrations, and promote the use of Baishui County Tongyang Original Farm and Wangyang Town of Heyang County as the core, implement various established breeding management practices, and strive to increase the weight and meat production performance of multiple-feets and sheep. With stable fertility, we will extend related supporting technologies and excellent rams to the surface, expand the number of breeding on the surface, increase the quality of the main body, and increase the economic returns of farmers. Combining the same sheep breeding to improve four scientific research and promotion projects, and promoting the in-depth development of multiple-feet and sheep breeding, we will mainly seize the phenotype identification of sheep in spring and autumn each year, strengthen the selection of breeding male and female ewes, and formulate matching plans and breeding. Management technical specifications, lambing and lamb cultivation, determination of fertility and meat production performance, production and management benefits, and health care and disease prevention and control. Focusing on the self-intersection and breeding of ideal groups and expanding the number of core groups Since 1990, the outstanding male and female sheep with 1/4 and a small amount of 1/8 Han sheep have been handed over to each other. There have now been more than eight generations of self-intersection. Offspring. The key is to do a good job of selecting the rams and their effective use, and do a good job in the distribution of breeding rams so that the multi-feet and mutton groups can continue to develop steadily. This work lasted for more than 20 years. Since sheep are mostly scattered and bred for individual farmers, it has added a lot of difficulties to the continued selection and improvement of the system. In addition, it is limited to the work without special funds and can only guide the farmers to do a good job of breeding and obtain certain Benefit; Baishui Tongyang Kindergarten is one of the core bases, and it is still the main task of raising and breeding of the original species and sheep conservation. It has always maintained a small number of groups with multiple sheep breeding and raising, thinking that the surrounding area has multiple fetuses with sheep. Contribute to the development. In the future, it is still necessary to establish projects to strengthen the expansion and improvement. Non Woven Geotextile Fabric,Non Woven Geotextile,Non Woven Material,Non Woven Polypropylene Wuxi Kanghe Medical Consulting Co., Ltd. , https://www.jskanghe.com