Perfil de ácidos graxos e conteúdo de ácido linoléico conjugado no leite de vacas alimentadas com a combinação de óleo de soja e fontes de carboidratos na dieta

Eifert, Eduardo da Costa; Lana, Rogério de Paula; Lanna, Dante Pazzanese Duarte; Teixeira, Rafael Monteiro Araújo; Arcuri, Pedro Braga; Leão, Maria Ignêz; Oliveira, Marcus Vinícius Morais de; Filho, Sebastião de Campos Valadares

doi:10.1590/s1516-35982006000600034

Cited by 20 publications

(24 citation statements)

References 29 publications

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“…Griinari & Bauman (1999) also observed that the presence of concentrated reduces the concentration of CLA in duodenal content. Furthermore, researches (Mir et al, 2004;Eifert et al, 2006) show that choosing concentrates high in linoleic acid (C18: 2), as most of the oils, can increase the amount of CLA, which was not the case with this research. Bradford & Allen (2004), Eifert et al (2006) and Oliveira et al (2008) suggested that the retention time of digestion reduces the extent of biohydrogenation and formation of CLA in the rumen.…”

Section: Resultscontrasting

confidence: 69%

“…Furthermore, researches (Mir et al, 2004;Eifert et al, 2006) show that choosing concentrates high in linoleic acid (C18: 2), as most of the oils, can increase the amount of CLA, which was not the case with this research. Bradford & Allen (2004), Eifert et al (2006) and Oliveira et al (2008) suggested that the retention time of digestion reduces the extent of biohydrogenation and formation of CLA in the rumen. Pereira et al (2007) observed that diets with higher NDF have higher rumen retention time and in the present study, the NDF content of diet was inferior to conventional diets consisting only of silage.…”

Section: Resultscontrasting

confidence: 69%

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Profile of ingested fatty acids and in the duodenal digest of steers fed different diets

et al. 2010

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-It was evaluated in this study the effect of the type of the diet on duodenal flow of long-chain fatty acids in steers. The tested diets were the following: conventional (feedlot diet composed of 60% corn silage and 40% of concentrate); winter forage silage -rye grass (Lolium multiflorum, Lam); or tropical forage silage -association of millet (Pennisetum americanum, Leeke + alexander grass, Brachiaria plantaginea). Six Charolais × Nellore crossbred steers with cannulas in duodenum were used in a 3 × 3 double Latin square. Dry material intake was similar among the groups (mean of 4,037 g/day), but the intake of total fatty acids and saturated fatty acids were higher in the group fed tropical pasture silage. On the other hand, the animals which received the conventional diet consumed higher quantity of unsaturated fatty acids. Tropical pasture silage provided higher consumption of vacenic acid (C18:1 t-11) and the winter forage silage offered higher consumption of conjugated linoleic acid. The intake of omega-6 fatty acids was higher in the group fed conventional diet and for omega-3, intake was higher in the group fed tropical pasture diet. The total fatty acid flow in the duodenum was not affected by the diets, but in all treatments it was higher than the consumed one. The animals fed diet with concentrate show the greatest changes on the profile of fatty acids during the ruminal fermentation. Conventional diets provide the highest intake of unsaturated fatty acids and the highest availability of vacenic acid in the small intestine, but they do not increase the supply of intestinal conjugated linoleic acid.

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Section: Resultscontrasting

confidence: 69%

Section: Resultscontrasting

confidence: 69%

Profile of ingested fatty acids and in the duodenal digest of steers fed different diets

et al. 2010

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“…This hypothesis is supported by the negative correlations (r = -0.52 to -0.97, P<0.05) between the sum of the milk contents of de novo-synthesized FAs with those of several C18-unsaturated FAs (e.g., rumenic; linoleic; trans-9, cis-11 CLA; trans-9 C18:1; trans-10 C18:1; vaccenic; trans-12 C18:1; oleic; cis-11 C18:1, cis-12 C18:1 and others). The reduction in the milk contents of de novo-synthesized FAs in response to supplementation of diets with free vegetable oils is also well documented in the literature (EIFERT et al, 2006;RIBEIRO et al, 2014;LOPES et al, 2015). Comparing the control ration with the 4.5% SO ration, the reductions (P<0.0001) in the milk contents of lauric, myristic and palmitic acids were, respectively, 111%, 85% and 59%.…”

Section: Itemmentioning

confidence: 81%

“…In addition, it may cause an increase in the formation of FAs intermediates of ruminal biohydrogenation, such as trans-10, cis-12 CLA (EIFERT et al, 2006) and trans-9, cis-11 CLA (RIBEIRO et al, 2014), which are associated with the inhibition of lipogenesis in the mammary gland of cows (BERNARD et al, 2008;SHINGFELD et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Ruminal fermentation and degradation, kinetic flow of the digesta and milk fatty acid composition of cows fed chopped elephantgrass supplemented with soybean oil

Ribeiro

Lopes

Rodríguez

et al. 2018

SCA

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Ruminal fermentation and degradation, kinetic flow of the digesta and milk fatty acid composition of cows fed chopped elephantgrass supplemented with soybean oil Fermentação e degradação ruminal, cinética de fluxo da digesta e perfil de ácidos graxos do leite de vacas alimentadas com capimelefante picado suplementado com óleo de soja AbstractThe aim of this study was to evaluate the ruminal parameters of fermentation and degradation, kinetic flow of rumen digesta, and milk fatty acid composition of cows fed 52% chopped elephantgrass-based diets containing 0.0% (control), 1.5%, 3.0% and 4.5% soybean oil (SO) on a dry matter (DM) basis. Four rumen-cannulated Holstein x Gyr dairy cows with an average milk production of 15.6 ± 3.0 kg day -1 and 90 ± 25 days in milk were allocated in a 4 x 4 Latin square design. The results were analyzed by mixed models. Significant differences were declared at P≤0.05, and P-values from 0.05 < P ≤ 0.10 were considered as a trend. The inclusion of SO in the diet had no effect on the ruminal pH or total volatile fatty acid concentration, but there was a quadratic effect on the ruminal ammonia nitrogen content and a trend for a linear reduction (P=0.07) in the molar proportion of rumen acetate. Linear reductions were also observed in the DM and neutral detergent fiber (NDF) effective degradabilities of elephantgrass forage, but the fluid and particulate passage rates in the rumen and the DM and NDF intakes were unchanged by SO inclusion in the diet. Milk production, protein and lactose contents and yields were unaltered by dietary SO levels. There were linear reductions in the milk fat and total solids contents, but there was no effect of dietary treatments on their yields. The inclusion of soybean oil in the diet of Holstein x Gyr cows fed chopped elephantgrass improved the nutritional quality of milk fat as a result of increased contents of oleic, rumenic and vaccenic acids, which are beneficial to human health, and a concomitant reduction in hypercholesterolemic saturated fatty acids such as lauric, myristic and palmitic acids. ResumoO objetivo deste estudo foi avaliar os parâmetros de fermentação e degradação ruminal, a cinética de fluxo da digesta, e o perfil de ácidos graxos (AG) do leite de vacas alimentadas com 52% de capimelefante picado e inclusão de 0,0 (controle), 1,5, 3,0 e 4,5% de óleo de soja (OS) na matéria seca (MS) da dieta. Foram utilizadas quatro vacas Holandês x Gir com 90 ± 25 dias em lactação, produzindo 15,6 ± 3,0 kg dia -1 de leite, canuladas no rúmen, e alocadas em delineamento Quadrado Latino 4 x 4. Os resultados foram analisados por modelos mistos. Efeitos foram considerados significativos quando P <0,05, enquanto valores de P entre 0,05 e 0,10 foram considerados indicativos de tendência. A inclusão de OS na dieta não alterou o pH do rúmen, nem a concentração total de ácidos graxos voláteis, mas promoveu efeito quadrático sobre a concentração de N amoniacal, e tendência de redução linear (P=0,07) sobre a proporção molar de acetato. Foram observadas reduções...

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“…Soybean based products have a high percentage of unsaturated fatty acids, and soybean has an average of 75% unsaturated fat (Eifert et al, 2006). However, unsaturated fatty acids can affect the rumen fermentation (Muller et al, 2005) and the ways of including these ingredients have been constantly assessed for use in ruminant diets.…”

Section: Introductionmentioning

confidence: 99%

Performance, carcass characteristics and non-carcass components of Texel × Santa Inês lambs fed fat sources and monensin

Soares

Garcia²,

Pereira

et al. 2012

R. Bras. Zootec.

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-Performance, carcass, non-carcass and commercial cuts and components of Texel × Santa Inês crossbred lambs, managed in confinement and fed diets based on soybean oil, soybeans and a conventional diet, with or without the use of monensin (78 ppm dry matter basis) were evaluated. Thirty-six Texel × Santa Inês lambs (18 males and 18 females) were managed in intensive systems. Animals were slaughtered after 87 days of confinement, and performance, carcass characteristics, weight and percentages of carcass and non-carcass components were evaluated. The animals fed the control diet had heavier carcass and parts than animals fed soybean, while the oil diet did not differ from the controls in most parameters. The animals fed soybean showed lower intake kg dry matter (DM), organic matter (OM), crude protein (CP), neutral detergent fiber (NDF) and metabolizable energy (ME) compared with animals fed the control diet, increased ether extract (EE) intake in kg, % body weight (BW) and metabolic weight (MW) and did not differ from the soybean oil diet. Animals receiving monensin had lower DM intake, OM, CP, EE, NDF, gross energy (GE) regardless of the expression, % kg BW, or % PM, than the animals that did not receive the additive. Males produced better and had heavier cuts than the females; the latter deposited subcutaneous fat earlier. Animals that received oil or soybean showed greater body weight and small intestine percentage. Soybean oil intake did not improve performance, carcass weights or parts of Santa Ines × Texel lambs in confinement. Soybeans at 15% dry matter reduced energy intake and lamb performance. The use of monensin at 78 ppm on a dry matter basis is not recommended for lambs in confinement, especially if associated with oil or soybeans that may harm animal performance.

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Perfil de ácidos graxos e conteúdo de ácido linoléico conjugado no leite de vacas alimentadas com a combinação de óleo de soja e fontes de carboidratos na dieta

Cited by 20 publications

References 29 publications

Profile of ingested fatty acids and in the duodenal digest of steers fed different diets

Profile of ingested fatty acids and in the duodenal digest of steers fed different diets

Ruminal fermentation and degradation, kinetic flow of the digesta and milk fatty acid composition of cows fed chopped elephantgrass supplemented with soybean oil

Performance, carcass characteristics and non-carcass components of Texel × Santa Inês lambs fed fat sources and monensin

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