单 位：
中国农业大学动物科技学院动物营养学国家重点实验室
关键词：
育成期营养;皖南牛;背最长肌;脂肪;蛋白质;水分
摘 要：
研究育成期日粮营养对育肥皖南牛背最长肌的上脑、眼肉和西冷脂肪、蛋白质和水分含量的影响。采用30头去势的相近的7月龄皖南牛,随机平均分成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个月屠宰。结果表明:育成期按体质量1.0%饲喂精料的G1.0组的营养水平最有利于育肥期皖南牛上脑、眼肉和西冷的脂肪沉积和蛋白质的生成,不同部位都含有较高的脂肪和蛋白质,较低的水分,常规营养物质含量一致性强,变化范围小。
译 名：
Effect of Growth-Period Nutrition on the Proximate Nutrient Contents of Different Locations along longissimus dorsi 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;;longissimus dorsi;;fat;;protein;;moisture
摘 要：
The objective of this study was to find the most practical nutrition program for producing high-quality beef by studying how growth-period nutrition affected the nutrient contents of highrib,ribeye and striploin segments of the longissimus dorsi muscles of fattening Wannan cattle.Thirty 7-month-old and castrated Wannan cattle of similar weights were randomly and equally divided into five groups that were provided a feed concentrate at 1.9%(G1.9),1.6%(G1.6),1.3%(G1.3),1.0%(Gl.0) and 0.7%(G0.7) of their body weight for twenty-four months respectively.The fattening-period was three months and the feeding program was same.The results showed that the growth-period nutritional level and the feeding program of group Gl.O,for which the concentrate was supplied at 1.0%of the body weight,was most conducive to fat deposition and protein synthesis,and had the higher contents of fat and protein,lower moisture in the highrib,ribeye and striploin of fattening Wannan cattle,and there was a strong consistency among three beef samples.Wannan cattle could produce marbling even snowflake beef according to the national standard of beef grading.
