期刊
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
卷 96, 期 2, 页码 474-483出版社
WILEY
DOI: 10.1002/jsfa.7113
关键词
20:5 n-3; goat; biohydrogenation; rumen microbe
资金
- Natural Science Foundation of Jiangsu Province [BK2007721]
BACKGROUND: Marine products can inhibit biohydrogenation in the rumen, but the mechanism is not clear. This study investigated a 20:5 n-3 rich supplement effects on rumen biohydrogenation, microbial change and fermentation characteristics in goats. RESULTS: The supplementation decreased 18:0 proportions in rumen fatty acids (P < 0.001), while it increased cis-9, trans-11 conjugated linoleic acid (CLA) (P < 0.001) and trans-10, cis-12 CLA proportions (P < 0.001). The supplement reduced the number of Butyrivibrio spp. and B. proteoclasticus (P < 0.01). Denaturing gradient gel electrophoresis redundancy analysis indicated that some species, mainly from the rumen of goats receiving the 2.5 and 5.0g d(-1) supplement, were positively correlated with cis-9, trans-11 CLA proportions; some species, mainly from the rumen of control goats, were positively correlated with 18:0 proportions. The supplement reduced the NH3-N concentrations and acetate molar proportions in the rumen (P < 0.05), but increased propionate and butyrate molar proportions (P < 0.01), and had no effect on total volatile fatty acid concentration. CONCLUSION: The supplement rich in 20:5 n-3 reduced the biohydrogenation of 18-carbon unsaturated fatty acids with a significant reduction of the 18:0 proportion and this was coupled with the suppression of the abundance of biohydrogenating bacteria and unknown bacteria. (c) 2015 Society of Chemical Industry
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