平凉红牛高效品质化生产技术体系的构建与应用OA

Aiming at the problems of unstable high-grade meat yield,low feeding efficiency and antibiotic dependence in the industrialization process of Pingliang Red Cattle,this study constructed a production technology system with genome breeding,early castration,feed ripening,precision nutrition,health mana-gement and stress control as the core through long-term production practice integration and key experi-mental verification.Firstly,the core group was screened by genome assessment.Secondly,castration was carried out at 6-8 months of age,and grain steam compression and staged precision nutrition strategies were adopted during feeding.The straw steam explosion wall fermented forage and 0.09％(mass fraction of dry matter intake)oregano essential oil addition technology were integrated for non-antibiotic healthy breeding,while fine stress management was implemented.The results of system application showed that the proportion of high-grade meat in the offspring of the core group selected by IPI index(Index of Produc-tion Performance,IPI,positive index,bull≥5.18,cow≥5.26)was(15.3±0.7)％.Early castration at 6-8 months significantly increased the marble pattern score to 7.57±0.6(P≤0.01),reaching the Japanese A3 standard.Integrated nutrition regulation technology to make daily gain ≥1 kg/d.The straw steam explosion fermentation forage combined with 0.09％oregano essential oil significantly reduced the incidence rate by 71％.Under the application of the system,the slaughter rate reached(61.51±1.31)％,and the meat tender-ness and water retention were significantly improved.This indicated that the application of this technical system could significantly improve the production efficiency,beef quality and health level of Pingliang Red Cattle,achieved antibiotic free breeding,and provide a replicable technical path for domestic high-end beef production.