月桂酸和肉豆蔻酸混合物对体外瘤胃产甲烷菌和甲烷生成的影响。
Effects of mixtures of lauric and myristic acid on rumen methanogens and methanogenesis in vitro.
作者信息
Soliva C R, Hindrichsen I K, Meile L, Kreuzer M, Machmüller A
机构信息
Institute of Animal Science, Animal Nutrition, Institute of Food Science, Laboratory of Food Microbiology, Swiss Federal Institute of Technology (ETH), Zurich, Switzerland.
出版信息
Lett Appl Microbiol. 2003;37(1):35-9. doi: 10.1046/j.1472-765x.2003.01343.x.
AIMS
To identify the most effective mixture of non-esterified lauric (C12) and myristic (C14) acid in suppressing ruminal methanogenesis, and to investigate their effects on the methanogenic population.
METHODS AND RESULTS
C12/C14 mixtures were incubated with rumen fluid using the Hohenheim gas test apparatus. Methane production and the numbers of Archaea declined with an increasing proportion of C12. With a 2 : 1 proportion of C12/C14, the maximum methane-suppressing effect (96%) was achieved similar to that with C12 alone. The proportions of the individual methanogenic orders of total methanogens were altered by varying the C12/C14 ratio.
CONCLUSIONS
Although C14 alone had no effect on methanogenesis, C14 enhanced the methane-suppressing effect of C12 in certain mixtures.
SIGNIFICANCE AND IMPACT OF THE STUDY
The results support strategies for an environment-friendly ruminant nutrition as it was demonstrated that part of the less palatable C12 could be replaced by C14 without losing its methane-suppressing potential.
目的
确定抑制瘤胃甲烷生成的最有效非酯化月桂酸（C12）和肉豆蔻酸（C14）混合物，并研究它们对产甲烷菌群体的影响。
方法与结果
使用霍恩海姆气体测试装置将C12/C14混合物与瘤胃液一起培养。随着C12比例的增加，甲烷产量和古菌数量下降。当C12/C14比例为2:1时，达到了与单独使用C12相似的最大甲烷抑制效果（96%）。通过改变C12/C14比例，可改变总产甲烷菌中产甲烷菌各个目所占的比例。
结论
虽然单独的C14对甲烷生成没有影响，但在某些混合物中C14增强了C12的甲烷抑制效果。
研究的意义和影响
结果支持了环境友好型反刍动物营养策略，因为研究表明，部分适口性较差的C12可以被C14替代，而不会失去其甲烷抑制潜力。
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