饲养方式对城口山地鸡肌肉品质与血液生理生化指标的影响研究OA

This experiment took 200 120-day-old Chengkou mountain chickens as the research object,divided into two groups:cage breeding and free-range breeding,and compared and analyzed the differences and correlations between their chest muscle quality and blood physiological and biochemical indicators.The results showed that the red blood cell count,hemoglobin,mean platelet volume,and superoxide dismutase content in the free-range group were significantly greater than those in the cage breeding group(P<0.05),while the mean corpuscular volume and glutathione peroxidase were significantly lower than those in the cage breeding group(P<0.05);in terms of meat quality,the b* value of breast muscle color and shear force in the free-range group were significantly lower than those in the cage breeding group(P<0.05),while the contents of glycine,histidine,valine,phenylalanine,lysine,aspartic acid,total essential amino acids,total amino acids,and the ratio of total essential amino acids/total amino acids were significantly higher than those in the cage breeding group(P<0.05).Further correlation analysis was conducted between meat quality performance and blood physiological and biochemical indicators.Under the free-range mode,the red blood cell count was significantly positively correlated with mean corpuscular volume,b* value of meat color,and shear force;hemoglobin,mean corpuscular volume,and mean platelet volume were significantly positively correlated with umami amino acids such as aspartic acid(P<0.05);while in the cage breeding mode,red blood cell count was also positively correlated with the b* value of meat color(P<0.05).In summary,the free-range mode is more suitable for improving the chest muscle quality and flavor of Chengkou mountain chickens and blood metabolism.