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Three-way hybrid pig breeding technology
The ternary crossbred pigs were crossbreeding pigs with good quality produced by hybridization of the three pig breeds in the combination sequence obtained from the cross combination test. Three-way crossbred pigs are highly affected by pig farms due to their fast growth (ie, high daily weight gain), high disease resistance, strong viability, good feed conversion (ie, low feed consumption, long fleshy), and high lean meat percentage. Welcome and consumer love. Foreign trade exports are mainly lean-lean "external ternary" high-quality pigs. The market premium ternary pigs sell 100-200 yuan more than ordinary pigs, and have strong market competitiveness. First, the selection of the optimal three-way hybrid pig combination model Currently used in China, there are two types of three-way hybrid pig combination: First, the foreign lean-type pig breed Duroc, Changbai, Yorkshire three hybrid production Du Changda three Yuan hybrid pig combination model, which has the characteristics of high feed remuneration, fast daily gain, and high lean meat ratio. It is suitable for intensive pig farms and large-scale pig farms with higher production levels; second, local pigs Qingping pigs, Tongcheng pigs, and Taihu pigs were used as female parents. The crossbreeding patterns of foreign crossbred lean lean pigs, Yorkshire and Changbai, were used as the first and second parents to grow up. Farmers and pig farms on a moderate scale. Second, to promote the use of three materials that are pigs feed, pig feed, concentrates or ingredients and other high-tech feed, as well as new piglet iron supplementation technology, improve the early growth rate of piglets. 1. Early feed technology for suckling pigs. One of the key points for piglet breeding is early feeding. The piglet should start feeding the piglet at 7 days of age. Gradually using the pig feed before and after weaning can effectively increase the early growth rate of piglets and lay a good foundation for post-weaning fattening. Foundation. 2, pig iron supplementation technology. The iron supplementation of newborn piglets can significantly increase the weaning weight and the growth rate of the piglets. According to our experimental data and other relevant reports, under the same conditions piglets were iron supplemented within 3 to 5 days after birth, especially the injection of iron selenium mixture "rich iron force" whose weaning head weight was 1-3 kg heavier than those without iron supplementation. the above. 3. The farms or specialized households with good economic conditions should promote the use of full-price compounding materials. If the economic conditions are not enough, the "rice (brown rice, corn or other self-energy feed) + concentrates" feeding technology can be promoted to enhance cooperation. Feed use rate, raising pig raising level, promoting pig growth, and reducing feed remuneration at the same time. Third, strengthen the feeding and management In the growth and finishing pigs feeding management, we must adhere to the "four changes." The first is to feed a single batch of ingredients (mixtures). The second is to change the clinker to feed. In addition to soybeans, raw bean cakes, potatoes, etc. should be fed. The third is to dilute the feed to dry or wet mix. The fourth is to change the "hanging shelf" into a straight line (the so-called "one-stop") fattening. The so-called "hanging shelf" is a method of growing pigs in the middle of growing pigs, mainly using green coarse materials to post-feeding and fattening. This method is extremely unfavorable to the growth and development of shelf-pigs, because shelf-pigs have the fastest muscle growth at this stage. "Dragon Shelves" caused the lack of nutrition during this period, the muscles did not grow fully, and fat deposition was excessive after the late feeding. As a result, the lean meat of the pigs was greatly reduced. Therefore, the rearing pigs should adopt the straight-line fattening method, that is, from the weaning piglet until the fat pigs are slaughtered. According to different growth stages, different feeding standards are adopted, and the entire period is fed with the compounding and mixing materials. This method increases the weight of the pigs. Fast, short fattening period, fast turnover, high slaughter rate, high feed utilization rate and slaughter rate, but more refined material needed. IV. Implementation of comprehensive prevention and control technologies The prevention of epidemic diseases is a guarantee for the production of Sanyuan pigs. There are many epidemics of live pigs. We must adhere to the principle of prevention and treatment, and focus on the prevention and control of epidemic diseases that will have a devastating impact on production. The pig producers should formulate a comprehensive immunization program according to the prevalence of epidemic diseases in the area and do regular disinfection.