动物营养学报2008，Vol.20Issue(2)：223-227,5.
添加不同比例的亚油酸和亚麻酸对体外瘤胃发酵和甲烷生成的影响
Effects of Adding Mixtures of Linoleic Acid and Linolenic Acid with Different Proportions on Rumen Fermentation and Methanogenesis in vitro
摘要
Abstract
This study was carried out to investigate the effects of mixtures of linoleic acid and linolenic acid with different pro-portions on rumen fermentation and methanogenesis by using gas production function of artificial rumen.Linoleic acid and were added into tubes at a level of 5% DM of substrates.A non-supplemented substratc tube was employed as the control.The 24 h gas production and methanogenesis were significantly reduced with the addition of any mixture (P<0.05).The more the linolenic acid added,the more the decrease was.The pH of the fermentation fluid were significantly increased (P<0.05),when the proportion of Linolenic acid was more than 40%.All treatments had no significant effect on NH3-N pro-duction and microbial mass.The total volatile fatty acids increased with the increasing ratio of linolenic acid,being signifi-cantly higher with the addition of linolenic acid alone than linoleic acid alone (P<0.05).The fermentation pattern was also changed,being reflected by lower proportion of acetate and higher proportion of propionate with the increasing ratio of lin-olenic acid (P<0.05).It is inferred that reduction of methanogenesis is associated with the degree of unsaturation of C18 fatty acids.关键词
甲烷/体外产气法/亚油酸/亚麻酸Key words
Methane/ Gas production in vitro / Linoleic acid/ Linolenic acid分类
农业科技引用本文复制引用
张春梅,易贤武,苑志朋,刘建新,朱伟云..添加不同比例的亚油酸和亚麻酸对体外瘤胃发酵和甲烷生成的影响[J].动物营养学报,2008,20(2):223-227,5.基金项目
Financial support:the National Natural Science foundation of China (NSFC) (No. 30530560) and Joint FAO/IAEA Division, IAEA (No. 12665/RO) （NSFC）
