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当前位置: 首页 > 文章 > α-亚麻酸对瘤胃微生物体外发酵特性及其生物氢化中间产物的影响 动物营养学报 2014,26 (7) 2018-2025
Position: Home > Articles > α-Linolenic Acid: Effects on Ruminal Fermentation Characteristics and the Intermediates of Bio-Hydrogenation Chinese Journal of Animal Nutrition 2014,26 (7) 2018-2025

α-亚麻酸对瘤胃微生物体外发酵特性及其生物氢化中间产物的影响

作  者：
周薇;徐方华;陈娜;高青山;李香子
单  位：
延边大学农学院
关键词：
α-亚麻酸;生物氢化;共轭亚油酸;共轭亚麻酸
摘  要：
本试验旨在研究α-亚麻酸对瘤胃微生物体外发酵特性及生物氢化中间产物的影响。采用体外批次培养法,各组分别在培养底物中添加0(CON组)、1.5%(LL组)、3.0%(ML组)、4.5%(HL组)的α-亚麻酸(干物质基础),每组3个重复。结果表明:1)ML组、HL组氨态氮含量及总挥发性脂肪酸、乙酸、丁酸浓度不同程度地低于CON组,丙酸浓度高于CON组。2)随培养时间延长,CON组及LL组顺9,顺12-亚油酸含量下降,其余2组上升,12 h时ML组极显著高于CON组和LL组(P<0.01)。3)HL组顺9,反11,顺15-共轭亚麻酸、顺9,反13,顺15-共轭亚麻酸含量在各时间点均极显著高于其他组(P<0.01)。4)ML组、HL组在12 h时总共轭亚油酸及总共轭亚麻酸的含量极显著高于其他各组(P<0.01)。总之,饲粮中添加α-亚麻酸可以改变瘤胃发酵模式,产生多种油酸异构体,促进瘤胃内反11,顺15-亚油酸、共轭亚油酸和共轭亚麻酸的累积,且总共轭亚麻酸与α-亚麻酸存在剂量效应关系。
译  名：
α-Linolenic Acid: Effects on Ruminal Fermentation Characteristics and the Intermediates of Bio-Hydrogenation
作  者：
ZHOU Wei;XU Fanghua;CHEN Na;GAO Qingshan;LI Xiangzi;Agricultural College of Yanbian University;
关键词：
α-linolenic acid;;bio-hydrogenation;;CLA;;CLnA
摘  要：
This study was conducted to determine the effects of α-linolenic acid on ruminal fermentation characteristics and the intermediates of bio-hydrogenation. In vitro batch culture w as applied,and α-linolenic acid w as added to a basal substrate at levels of 0( CON group),1.5%( LL group),3.0%( ML group) and 4.5%( HL group)( DM basis),respectively. Each group had three replicates. The results showed as follows: 1)ammonia nitrogen content,and the concentrations of total volatile fatty acids,acetic acid,butyric acid in ML and LL groups w ere low er than those in CON group at different degree,w hile propionic acid concentration w as higher than that in CON group. 2) With the increase of culture time,c9,c12-C18∶2 content in CON and LL groups w as decreased,w hile that in other tw o groups w as increased and ML group reached the maximum at12 h,w hich w as significantly higher than that in CON and LL groups( P<0.01). 3) c9,t11,c15-CLnA and c9,t13,c15-CLnA contents in HL group w ere significantly higher than those in the other groups at each time point( P<0.01). 4) Conjugated linoleic acid( CLA) and conjugated linolenic acid( CLnA) contents in ML and HL groups w ere significantly higher than those in the other groups at 12 h( P<0.01). Therefore,dietary supplementation of α-linolenic acid can change ruminal fermentation pattern,produce a variety of C18∶1 isomers,promote the accumulation of t11,c15-C18∶2,CLA and CLnA in rumen fluid,and there is dose-effect relationship betw een total CLnA and α-linolenic acid.

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