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首页> 外文期刊>Journal of Animal Physiology and Animal Nutrition >Effects of incremental amounts of fish oil on trans fatty acids and Butyrivibrio bacteria in continuous culture fermenters.
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Effects of incremental amounts of fish oil on trans fatty acids and Butyrivibrio bacteria in continuous culture fermenters.

机译：鱼油增量对连续培养发酵罐中反式脂肪酸和Butyrivibrio细菌的影响。

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摘要

Previous studies have shown that adding fish oil (FO) to ruminant animal diets increased vaccenic acid (VA; t11 C18:1) accumulation in the rumen. Therefore, the objective of this study was to evaluate the effect of dietary FO amounts on selected strains of rumen bacteria involved in biohydrogenation. A single-flow continuous culture system consisting of four fermenters was used in a 4x4 Latin square design with four 9 days consecutive periods. Treatment diets were as follows: (i) control diet (53:47 forage to concentrate; CON), (ii) control plus FO at 0.5% (DM basis; FOL), (iii) control plus FO at 2% (DM basis; FOM) and (iv) control plus FO at 3.5% (DM basis; FOH). Fermenters were fed treatment diets three times daily at 120 g/day. Samples were collected from each fermenter on day 9 of each period at 1.5, 3 and 6 h post-morning feeding and then composited into one sample per fermenter. Increasing dietary FO amounts resulted in a linear decrease in acetate and isobutyrate concentrations and a linear decrease in acetate-to-propionate ratio. Propionate, butyrate, valerate and isovalerate concentrations were not affected by FO supplementation. Concentrations of C18:0 in fermenters linearly decreased, while concentrations of t10 C18:1 and VA linearly increased as dietary FO amounts increased. The concentrations of c9t11 and t10c12 conjugated linoleic acid were not affected by FO supplementation. The DNA abundance for Butyrivibrio fibrisolvens, Butyrivibrio vaccenic acid subgroup, Butyrivibrio stearic acid subgroup and Butyrivibrio proteoclasticus linearly decreased as dietary FO amounts increased. In conclusion, FO effects on trans fatty acid accumulation in the rumen may be explained in part by FO influence on Butyrivibrio group.
机译：先前的研究表明，将反刍动物饲料中添加鱼油（FO）会增加瘤胃中的痘苗酸（VA; t11 C18：1）积累。因此，本研究的目的是评估饮食中FO量对参与生物加氢的瘤胃细菌某些菌株的影响。由四个发酵罐组成的单流连续培养系统用于4x4拉丁方形设计，连续四个9天。治疗饮食如下：（i）对照饮食（53:47精饲料; CON），（ii）对照加FO的含量为0.5％（DM; FOL），（iii）对照加FO的含量为2％（DM的基础） ; FOM）和（iv）对照加FO的含量为3.5％（以DM为基准; FOH）。发酵罐每天以120克/天的剂量饲喂三餐。在每个时段的第9天，早晨喂食后1.5、3和6小时，从每个发酵罐中收集样品，然后将每个发酵罐混合成一个样品。饮食中FO含量的增加导致乙酸盐和异丁酸盐浓度的线性下降，以及乙酸盐/丙酸酯比率的线性下降。丙酸，丁酸，戊酸和异戊酸的浓度不受FO补充的影响。随着饮食中FO含量的增加，发酵罐中C18：0的浓度线性下降，而t10 C18：1和VA的浓度线性增加。 c9t11和t10c12共轭亚油酸的浓度不受FO补充的影响。随着食物中FO含量的增加，纤维溶丁酸梭菌，维氏丁酸梭菌酸，硬脂酸丁酸杆菌和proteoclasticus丁酸梭菌的DNA丰度线性降低。总之，FO对瘤胃中反式脂肪酸积累的影​​响可能部分由FO对Butyrivibrio组的影响所解释。

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