中链脂肪酸对体外发酵甲烷产量的影响  

Effects of Medium-Chain Fatty Acids on Rumen Methane Yield

作　　者：李玉珠[1] 刘发央[2] 龙瑞军[1] 

机构地区：[1]甘肃农业大学草业学院,甘肃兰州730070 [2]甘肃农业大学生命科技学院,甘肃兰州730070

出　　处：《家畜生态学报》2007年第1期52-54,共3页Journal of Domestic Animal Ecology

基　　金：IAEACPR-12666/RO项目资助

摘　　要：利用人工瘤胃体外产气法研究不同精粗比(0:1和1:1)日粮类型时中链脂肪酸对甲烷产量的影响。结果显示,体外培养24h,添加脂肪酸对甲烷产量的抑制作用不受日粮类型的影响(P>0.05);与不添加酸的对照相比,添加50mg未酯化月桂酸(C12:0)及月桂酸和肉豆蔻酸(C14:0)以3:2的比例组成的混合物(50mg)可分别抑制甲烷产量的22.2%(P<0.01)和11.8%(P<0.05);添加50 mg未酯化C14:0使甲烷产量降低3.4%(P>0.05);不同日粮类型上饲料产气量、瘤胃液pH值和氨氮浓度差异显著(P<0.01)。The methane-suppressing effects of medium-chain fatty acids （MCFA） were investigated using basal diets of extensive type and intensive type by the Hohenheim gas test apparatus. The results sug- gest that without interaction （ P〉 0.05 ） between diet types and methane-suppressing impacts with MCFA supplementation were observed at 24 h incubation. Compared to control, 50 mg non-esterified lauric acid （C12,0）, 50 mg non-esterified myristic acid （C14,0） and their mixture at a ratio of 3：2 supplementations suppressed methane yield in vitro by 22.2 % （ P 〈 0.01 ）, 11.8% （ P 〈 0.05 ） and 3.4 % （ P 〉 0.05 ） individually. In vitro gas production, pH value and ammonium were significantly different （ P 〈 0.01 ） when diet type from extensive to intensive.

关 键 词：中链脂肪酸 甲烷产量 体外产气法 日粮类型 

分 类 号：S811.5[农业科学—畜牧学]