单 位：
中国农业大学动物科技学院,动物营养学国家质量点实验室;中国农业大学动物科技学院
摘 要：
研究育成期日粮营养对育肥皖南牛产肉性能和胴体等级的影响。30头去势的体质量相近的7月龄皖南牛,平均随机分成5组,各组根据体质量的1.9%、1.6%、1.3%、1.0%和0.7%补充育成期精料饲养到24月龄进行育肥,各组在饲养程序相同条件下育肥期3个月后屠宰分割。结果表明:育成期的营养水平育肥期皖南的屠宰性能和胴体等级能产生影响,按体质量1%饲喂精料的G1.0组营养水平能显著提高胴体和净肉中高档肉块比例,该组育成期营养水平使5~7肋骨横切面有丰富的脂肪分布,达到优级胴体等级。
译 名：
Effect of Growth-Period Nutrition on Slaughter Performance and Beef Carcass Grade of Fattening Wannan Cattle
作 者：
ZHANG Xinglong;YANG Yongzai;WANG Changshui;CAO Binghai;State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University;
关键词：
growth-period nutrition;;Wannan cattle;;slaughter performance;;beef carcass grade
摘 要：
The objective of this study was to find the most practical nutrition program for producing high-quality beef by analyzing the effect of growth-period nutrition on the slaughter performance and beef carcass grade. Thirty castrated 7-month-old Wannan cattle of similar body weights were randomly and equally divided into five groups: G1.9, G1.6, G1.3, G1.0 and G0.7 that were respectively provided with a feed concentrate at 1.9%, 1.6%, 1.3%, 1.0% and 0.7% of their body weight for twenty-four months, the fattening-period was three months and the feeding program was same. The results showed that the growth-period nutritional level and feeding program of group G1.0 was most conducive to fat deposition and distribution in the ribeye, increasing the proportions of high quality beef in beef carcasses and pure meat and making the beef carcasses reaching the choice beef grade.
