Influence of docosahexaenoic acid on the
concentration of fatty acids and volatile fatty acids
in rumen fluid analysed by a rumen-simulation
techniques

Liu, L.; Wang, J. Q.; Bu, D. P.; Liu, S. J.; Liang, Sz; Liu, K. L.; Wei, H.Y.; Zhou, Lin

doi:10.22358/jafs/66376/2009

Cited by 4 publications

(2 citation statements)

References 20 publications

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“…The concentration of rumen VFA was analyzed by gas chromatography (model 6890, Series II; Hewlett Packard Co., Avondale, PA, USA) as described by Liu et al . (). Urine samples were pooled within each cow for each period and analyzed for PD (allantoin and uric acid) by the procedures of Chen and Gomes ().…”

Section: Methodsmentioning

confidence: 97%

Milk production and composition responds to dietary neutral detergent fiber and starch ratio in dairy cows

Zhao

Wang

et al. 2015

Anim Sci J

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This study was designed to investigate whether dietary neutral detergent fiber (NDF) : starch ratio could be considered as a nutritional indicator to evaluate carbohydrate composition and manipulate milk production and composition synthesis. Eight primiparous dairy cows were assigned to four total mixed rations with NDF : starch ratios of 0.86, 1.18, 1.63 and 2.34 from T1 to T4 in a replicated 4 × 4 Latin square design. Dry matter intake and milk production were decreased from T1 to T4. Digestibility of dry matter, organic matter, NDF and crude protein were linearly decreased from T1 to T4. As NDF : starch ratio increased, milk protein content and production, and milk lactose content and production were linearly reduced. However, milk fat content was linearly increased from T1 to T4. Quadratic effect was observed on milk fat production with the highest level in T3. Averaged rumen pH was linearly increased from T1 to T4, and subacute rumen acidosis occurred in T1. Ruminal propionate and butyrate concentration were linearly decreased, and microbial crude protein and metabolizable protein decreased from T1 to T4. It is concluded that NDF : starch ratio can be considered as a potential indicator to evaluate dietary carbohydrate composition and manipulate milk production and composition synthesis.

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Section: Methodsmentioning

confidence: 97%

Milk production and composition responds to dietary neutral detergent fiber and starch ratio in dairy cows

Zhao

Wang

et al. 2015

Anim Sci J

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“…i) Direct effect: reduction in methanogenic microorganisms, about 75% reduction in protozoa population was reported during in vitro analysis with CS [ 33 ]. CS has been reported to stimulate the production of fatty acids [ 55 ], and unsaturated fatty acids, which are toxic to protozoa [ 56 ]. Long-chain fatty acids produced in response to CS could make the food particles unavailable to the protozoa and reduce their population.…”

Section: Application Of Cs In Ruminantsmentioning

confidence: 99%

Coated cysteamine, a potential feed additive for ruminants — An updated review

Yaqoob,

Hou,

Zhe

et al. 2024

Anim Biosci

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For sustainable development, better performance, and less gas pollution during rumen fermentation, there is a need to find a green and safe feed additive for ruminants. Cysteamine (CS) is a biological compound naturally produced in mammalian cells. It is widely used as a growth promoter in ruminants because of its ability to control hormone secretions. It mainly controls the circulating concentration of somatostatin and enhances growth hormone production, leading to improved growth performance. CS modulates the rumen fermentation process in a way beneficial for the animals and environment, leading to less methane production and nutrients loss. Another beneficial effect of using CS is that it improves the availability of nutrients to the animals and enhances their absorption. CS also works as an antioxidant and protects the cells from oxidative damage. In addition, CS has no adverse effects on bacterial and fungal alpha diversity in ruminants. Dietary supplementation of CS enhances the population of beneficial microorganisms. Still, no data is available on the use of CS on reproductive performance in ruminants, so there is a need to evaluate the effects of using CS in breeding animals for an extended period. In this review, the action mode of CS was updated according to recently published data to highlight the beneficial effects of using CS in ruminants.

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

Pierce

et al. 2019

Animal

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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 α-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.

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Influence of docosahexaenoic acid on the concentration of fatty acids and volatile fatty acids in rumen fluid analysed by a rumen-simulation techniques

Cited by 4 publications

References 20 publications

Milk production and composition responds to dietary neutral detergent fiber and starch ratio in dairy cows

Milk production and composition responds to dietary neutral detergent fiber and starch ratio in dairy cows

Coated cysteamine, a potential feed additive for ruminants — An updated review

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

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