Department of Animal Science, Texas A&M AgriLife Research, Texas A&M University, College Station 77843-2471, USA.
J Anim Sci. 2012 Dec;90(13):5143-51. doi: 10.2527/jas.2012-5550. Epub 2012 Sep 5.
The 2011 National Beef Quality Audit (NBQA-2011) assessed the current status of quality and consistency of fed steers and heifers. Beef carcasses (n = 9,802), representing approximately 10% of each production lot in 28 beef processing facilities, were selected randomly for the survey. Carcass evaluation for the cooler assessment of this study revealed the following traits and frequencies: sex classes of steer (63.5%), heifer (36.4%), cow (0.1%), and bullock (0.03%); dark cutters (3.2%); blood splash (0.3%); yellow fat (0.1%); calloused rib eye (0.05%); overall maturities of A (92.8%), B (6.0%), and C or greater (1.2%); estimated breed types of native (88.3%), dairy type (9.9%), and Bos indicus (1.8%); and country of origin of United States (97.7%), Mexico (1.8%), and Canada (0.5%). Certified or marketing program frequencies were age and source verified (10.7%), ≤A(40) (10.0%), Certified Angus Beef (9.3%), Top Choice (4.1%), natural (0.6%), and Non-Hormone-Treated Cattle (0.5%); no organic programs were observed. Mean USDA yield grade (YG) traits were USDA YG (2.9), HCW (374.0 kg), adjusted fat thickness (1.3 cm), LM area (88.8 cm2), and KPH (2.3%). Frequencies of USDA YG distributions were YG 1, 12.4%; YG 2, 41.0%; YG 3, 36.3%; YG 4, 8.6%; and YG 5, 1.6%. Mean USDA quality grade (QG) traits were USDA quality grade (Select(93)), marbling score (Small(40)), overall maturity (A(59)), lean maturity (A(54)), and skeletal maturity (A(62)). Frequencies of USDA QG distributions were Prime, 2.1%; Choice, 58.9%; Select, 32.6%; and Standard or less, 6.3%. Marbling score distribution was Slightly Abundant or greater, 2.3%; Moderate, 5.0%; Modest, 17.3%; Small, 39.7%; Slight, 34.6%; and Traces or less, 1.1%. Carcasses with QG of Select or greater and YG 3 or less represented 85.1% of the sample. This is the fifth benchmark study measuring targeted carcass characteristics, and information from this survey will continue to help drive progress in the beef industry. Results will be used in extension and educational programs as teaching tools to inform beef producers and industry professionals of the current state of the U.S. beef industry.
2011 年全国牛肉质量评估(NBQA-2011)评估了育肥牛和小母牛的当前质量和一致性状况。从 28 个牛肉加工设施中每个生产批次中随机抽取约 10%的牛肉胴体(n=9802)进行调查。本研究冷却器评估的胴体评估揭示了以下特征和频率:公牛(63.5%)、小母牛(36.4%)、母牛(0.1%)和小公牛(0.03%)的性别类别;暗切割(3.2%);血溅(0.3%);黄脂(0.1%);起皱的肋眼(0.05%);A 级(92.8%)、B 级(6.0%)和 C 级或更高(1.2%)的总体成熟度;本土(88.3%)、奶牛型(9.9%)和印度野牛(1.8%)的估计品种类型;原产国为美国(97.7%)、墨西哥(1.8%)和加拿大(0.5%)。经认证或营销计划的频率为年龄和来源验证(10.7%)、≤A(40)(10.0%)、Certified Angus Beef(9.3%)、Top Choice(4.1%)、天然(0.6%)和非激素处理牛(0.5%);未观察到有机计划。美国农业部产肉等级(YG)特征的平均值为美国农业部 YG(2.9)、HCW(374.0 公斤)、调整后的脂肪厚度(1.3 厘米)、LM 面积(88.8 平方厘米)和 KPH(2.3%)。美国农业部 YG 分布的频率为 YG 1,12.4%;YG 2,41.0%;YG 3,36.3%;YG 4,8.6%;YG 5,1.6%。美国农业部质量等级(QG)特征的平均值为美国农业部质量等级(Select(93))、大理石花纹评分(Small(40))、总体成熟度(A(59))、瘦成熟度(A(54))和骨骼成熟度(A(62))。美国农业部 QG 分布的频率为 Prime,2.1%;Choice,58.9%;Select,32.6%;Standard 或更低,6.3%。大理石花纹评分分布为略有丰富或更高,2.3%;中等,5.0%;适度,17.3%;小,39.7%;轻微,34.6%;和痕迹或更少,1.1%。质量等级为 Select 或更高、产肉等级为 3 或更低的胴体占样本的 85.1%。这是第五次基准研究,测量了目标胴体特征,该调查的信息将继续帮助推动牛肉行业的发展。结果将用于推广和教育计划,作为向牛肉生产者和行业专业人士介绍美国牛肉行业现状的教学工具。