中国畜牧兽医2016，Vol.43Issue(8)：2005-2012,8.DOI:10.16431/j.cnki.1671-7236.2016.08.011
能量水平对舍饲育肥牦牛肌肉理化指标和氨基酸、脂肪酸组成及含量的影响
Effects of Energy Level on Physical and Chemical Indicators,Composition and Content of Amino Acids and Fatty Acids in Muscle of House-fed Yaks
摘要
Abstract
This experiment was conducted to investigate the effects of energy level on the physical and chemical indicators ,the composition and content of amino acids and fatty acids in muscle of house‐fed yaks .A complete randomized design was adopted in this study ,and sixty healthy and 3‐year‐old Maiwa yaks with an average body weight of (192 .66 ± 3 .64)kg were randomly divided into 3 groups with 20 replicates per group and 1 yak per replicate .Diets for all groups were of the same crude protein content (14 .81% ) and different net energy levels for gain (NEg ) with 4 .17 (LE) ,4 .48(ME) and 4 .79 MJ/kg (HE) ,respectively for 97 days (7‐day pretrial period ,and 90‐day feeding trial) .The results showed as follows :The level of energy had no effect on the value of pH ,cooking yield ,drip loss ,moisture ,crude protein (CP) ,crude fat (EE) ,calcium (Ca) and phos‐phorus (P) (P> 0 .05) .Except for the content of proline and histidine in muscle of group ME were significantly higher than the other groups (P<0 .05) ,the content of total amino acids and other kinds of amino acids had no significant difference (P>0 .05) .The content of monounsat‐urated fatty acids ,polyunsaturated fatty acids and total unsaturated fatty acids in ME group were significantly higher than the LE and HE groups ,and the content of total saturated fatty acids in HE group higher than the LE and M E groups .For all kinds of fatty acid ,the content of C15∶1 n‐3 ,C16∶1 n‐2 and C18∶1 n‐8 three monounsaturated fatty acids in M E group significantly in‐creased than the other two groups (P<0 .05);And the content of C17∶0 in HE group had a sig‐nificat rise trend .In conclusion ,we recommend 4 .48 MJ/kg (DM basis) as a diet appropriate NEg level for the barn feeding of fattening yak under this experimental condition ,appropriate NEg level of diet could improve the fatty acids content in muscle of the yaks .关键词
舍饲育肥牦牛/能量水平/理化指标/氨基酸/脂肪酸Key words
house-fed yak/energy level/physical and chemical indicators/amino acids/fatty acids分类
农业科技引用本文复制引用
王斌星,王鼎,郭春华,陈光吉,彭忠利,王永,蹇尚林..能量水平对舍饲育肥牦牛肌肉理化指标和氨基酸、脂肪酸组成及含量的影响[J].中国畜牧兽医,2016,43(8):2005-2012,8.基金项目
中央高校基本科研业务费专项资金项目---优质牦牛肉生产关健养殖技术研究 （）
