中国农业大学学报2024，Vol.29Issue(4)：239-250,12.DOI:10.11841/j.issn.1007-4333.2024.04.21
不同饲粮能量水平对肉驴血浆与肌肉中氨基酸含量的影响
Effects of different dietary energy level on amino acid composition in plasma and muscle tissue of meat donkey
摘要
Abstract
In order to investigate the effect of dietary energy level on plasma and muscle AA content of meat donkeys,36 meat donkeys(males)aged 1 year with similar body weights(150±25 kg)were divided into three groups,low energy(LEG),medium energy(MEG),and high energy(HEG).12.08,13.38 and 14.40 MJ/kg(pre-fattening,1-45 d),13.01,14.27 and 15.60 MJ/kg(mid-fattening,46-90 d),and 13.54,14.93 and 16.23 MJ/kg(post-fattening,91-135 d),respectively.At the end of the experiment,serum biochemical indexes,plasma and amino acid content in the most longissimus dorsi,triceps brachii,biceps femoris,gluteal muscles and muscle protein content were determined.The results showed that:1)The differences in muscle protein content between different dietary energy levels were not significant(P＞0.05).The contents of functional amino acids(FAA)and delicious amino acids(DAA)in plasma of MEG were significantly higher than those of LEG and HEG(P＜0.05)in plasma and brceps femoris muscle,and the contents of FAA and DAA in plasma of LEG were significantly higher than those of HEG(P＜0.05).2)MEG significantly increased the content of essential amino acid(EAA),branched chain amino acid(BCAA)content as well as EAA/total amino acid(TAA),EAA/non-essential amino acid(NEAA)(P＜0.05)in plasma and biceps femoris muscle,and significantly decreased NEAA and DAA content in biceps femoris muscle(P＜0.05).3)Total serum protein content of MEG was significantly higher than LEG(P＜0.05),but the difference was not significant compared with HEG.Serum glucose and cholesterol content of MEG and HEG were significantly higher than LEG(P＜0.001),but there was no difference between the two groups of MEG and HEG,and the change rule of urea content was opposite.Serum triglyceride and none-esterified fatty acid contents of HEG and LEG were significantly higher than those in MEG(P＜0.05),the triglyceridecontent of HEG was significantly higher than LEG,and the none-esterified fatty acid content was significantly lower than LEG(P＜0.05);With the increase of energy level,the content of high-density lipoprotein increased significantly(P＜0.001).In conclusion,feeding meat donkeys with medium energy levels in the early,middle and late stages of fatting can improve the AA balance and higher nutritional value of muscle in meat donkeys.This study provides a reference for improving the fattening performance and improving the meat quality of meat donkeys through nutritional regulation.关键词
肉驴/能量水平/氨基酸/血清生化指标Key words
meat donkey/energy level/amino acids/serum biochemical index分类
农业科技引用本文复制引用
李丽,赵艳丽,郭晓宇,郭咏梅,郑亚光,周艳,闫素梅,张勇伟..不同饲粮能量水平对肉驴血浆与肌肉中氨基酸含量的影响[J].中国农业大学学报,2024,29(4):239-250,12.基金项目
内蒙古自治区科技重大专项(2018zdzx2018001) （2018zdzx2018001）
