Rubber seed oil and flaxseed oil supplementation alter digestion, ruminal fermentation and rumen fatty acid profile of dairy cows

doi:10.1017/S175173111900137X

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	Rubber seed oil and flaxseed oil supplementation alter digestion, ruminal fermentation and rumen fatty acid profile of dairy cows
	Pi,Y.; Ma,L.; Pierce,K. M.; Wang,H. R.; Xu,J. C.; Bu,D. P.
通讯作者	Bu, D. P.(budengpan@126.com)
	2019
发表期刊	ANIMAL
ISSN	1751-7311
卷号	13 期号:12 页码:2811-2820
摘要	Rubber seed oil (RO) that is rich in polyunsaturated fatty acids (FA) can improve milk production and milk FA profiles of dairy cows; however, the responses of digestion and ruminal fermentation to RO supplementation in vivo are still unknown. This experiment was conducted to investigate the effect of RO and flaxseed oil (FO) supplementation on nutrients digestibility, rumen fermentation parameters and rumen FA profile of dairy cows. Forty-eight mid-lactation Holstein dairy cows were randomly assigned to one of four treatments for 8 weeks, including basal diet (CON) or the basal dietary supplemented with 4% RO, 4% FO or 2% RO plus 2% FO on a DM basis. Compared with CON, dietary oil supplementation improved the total tract apparent digestibility of DM, neutral detergent fibre and ether extracts ( P < 0.05). Oil treatment groups had no effects on ruminal digesta pH value, ammonia N and microbial crude protein ( P > 0.05), whereas oil groups significantly changed the volatile fatty acid (VFA) profile by increasing the proportion of propionate whilst decreasing total VFA concentration, the proportion of acetate and the ratio of acetate to propionate ( P < 0.05). However, there were no differences in VFA proportions between the three oil groups (P > 0.05). In addition, dietary oil supplementation increased the total unsaturated FA proportion in the rumen by enhancing the proportion of trans-11 C18:1 vaccenic acid (VA), cis-9, trans-11 conjugated linoleic acid (CLA) and alpha-linolenic acid (ALA) ( P < 0.05). These results indicate that dietary supplementation with RO and FO could improve nutrients digestibility, ruminal fermentation and ruminal FA profile by enhancing the VA, cis-9, trans-11 CLA and ALA composition of lactating dairy cows. These findings provide a theoretical basis for the application of RO in livestock production.
关键词	vegetable oils linolenic acid digestion ruminal metabolism lactating cows
DOI	10.1017/S175173111900137X
收录类别	SCI
语种	英语
WOS记录号	WOS:000514673000007
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/71081
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Pi,Y.,Ma,L.,Pierce,K. M.,et al. Rubber seed oil and flaxseed oil supplementation alter digestion, ruminal fermentation and rumen fatty acid profile of dairy cows[J]. ANIMAL,2019,13(12):2811-2820.
APA	Pi,Y.,Ma,L.,Pierce,K. M.,Wang,H. R.,Xu,J. C.,&Bu,D. P..(2019).Rubber seed oil and flaxseed oil supplementation alter digestion, ruminal fermentation and rumen fatty acid profile of dairy cows.ANIMAL,13(12),2811-2820.
MLA	Pi,Y.,et al."Rubber seed oil and flaxseed oil supplementation alter digestion, ruminal fermentation and rumen fatty acid profile of dairy cows".ANIMAL 13.12(2019):2811-2820.

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