中国牛业科学2025，Vol.51Issue(6)：24-32,51,10.DOI:10.26951/j.cnki.ccs.2025.06.005
去势与未去势空山牛肌肉中氨基酸差异分析
Analysis of Amino Acids Differences in the Muscles of Castrated and Uncastrated Kongshan Cattle
摘要
Abstract
This study aimed to analyze the content,composition,and distribution characteristics of ami-no acids in the muscles of uncastrated and castrated Kongshan cattle,to objectively evaluate their beef qua-lity,and to provide scientific basis for the development and utilization of local yellow cattle breeds in Ba-zhong City and Sichuan Province,as well as for the deep processing of beef products.The experiment selec-ted three healthy 48-month-old uncastrated Kongshan cattle and three castrated Kongshan cattle,and sam-ples from 13 muscle parts(chuck,ribeye,tenderloin,striploin,blade,topside,silverside,eye of round,rump,knuckle,brisket,flank,and shank).The basic nutritional components and amino acid content were determined,and the nutritional value was evaluated based on the amino acid pattern proposed by the Food and Agriculture Organization(FAO)and the World Health Organization(WHO).The results showed that:the average crude protein content in different muscle parts of uncastrated and castrated cattle was ap-proximately 20％,with the highest crude fat content found in the flank.All muscle parts were rich in amino acids.The total amino acids(TAA),essential amino acids(EAA),and non-essential amino acids(NEAA)content in uncastrated Kongshan cattle reached 18.88％,7.45％,and 11.43％,respectively,while those in castrated Kongshan cattle were 17.37％,6.85％,and 10.49％.The ratios of EAA/TAA and EAA/NEAA in uncastrated and castrated cattle averaged 39.43％,65.14％and 39.41％,65.23％,respectively,aligning with the FAO/WHO ideal protein model.Three flavor-related amino acids were distributed across all muscle parts,with the order:bitter amino acids＞sweet amino acids＞umami amino acids.Bitter amino acids ac-counted for 39.85％and 39.65％of TAA in uncastrated and castrated Kongshan cattle,respectively.Nutri-tional evaluation of essential amino acids revealed that the scores of seven EAAs in both groups exceeded FAO/WHO standards,with threonine,isoleucine,and lysine scores surpassing the standard by twofold or more.In conclusion,Kongshan beef exhibits excellent protein composition and high nutritional value,ser-ving as a premium protein source.关键词
空山牛/牛肉营养成分/牛肉氨基酸含量Key words
Kongshan cattle/nutritional composition of beef/amino acid content in beef分类
农业科技引用本文复制引用
陈玉慧,易治鑫,王巍,吴长凤,江淮,陈莹,马晓琴,闵星星,李林祥..去势与未去势空山牛肌肉中氨基酸差异分析[J].中国牛业科学,2025,51(6):24-32,51,10.基金项目
四川肉牛创新团队建设(SCCXTD-2025-13) （SCCXTD-2025-13）
