Fatty Acid Digestibility in Lactating Cows Fed Increasing Amounts of Protected Vegetable Oil, Fish Oil or Saturated Fat

Børsting, Christian Friis; Weisbjerg, M.R.; Hvelplund, T.

doi:10.1080/09064709209410122

Cited by 18 publications

(14 citation statements)

References 25 publications

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“…However, the digestibility of total C16 and total C18 was similar within diet. Previous research using lactating cows with duodenal and ileal cannulae (Børsting et al 1992) found that FA digestibility of C16:0 was higher than C18:0 when dietary fat sources were encapsulated by a casein-formaldehyde process. In a review of fat digestibility studies, Lock et al (2005) found that whole-tract digestibility of C16:0 was ∼750 g kg -1 and of C18:0 was ∼720 g kg -1…”

Section: Discussionmentioning

confidence: 97%

Impacts of feeding lipid supplements high in palmitic acid or stearic acid on performance of lactating dairy cows

Chamberlain

DePeters

2016

Journal of Applied Animal Research

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Effects of feeding lipid supplements high in free fatty acids (FAs) of palmitate (C16:0) or stearate (C18:0) plus C18:1 cis 9&10 on milk yield and composition, apparent whole-tract apparent digestibility of FA, and the FA composition of milk lipids were studied. Four lactating Holstein cows with ruminal cannulae were used in a 4 × 4 Latin square assignment of four dietary treatments. Lipid supplements were enriched in free fatty concentrations of either palmitic acid (P) or stearic acid (S). The total mixed-ration contained 20 g/kg of lipid supplement that consisted of varying proportions of P to S. Treatments were: 100:0 P:S (P), 0:100 P:S (S), and two mixtures including 66:34 P:S (PS) and 34:66 P:S (SP). Milk yield and dry matter intake were not affected by lipid supplement, but the concentration and yield of fat in milk increased with increasing C16:0 in the lipid supplement. Increasing the C16:0 concentration in the lipid supplement increased its concentration in milk lipids while increasing C18:0 in the lipid supplement increased C18:0 concentration in milk fat. Whole-tract apparent digestibility of neutral detergent fiber (NDF) did not differ with lipid supplement, but organic matter digestibility tended to decrease with increasing C18:0 in the lipid supplement. Whole-tract digestibility of total FAs decreased with the increasing proportion of C18:0 to C16:0 in the lipid supplement. Apparent digestibility of C16:0 and C18:0 was not different within dietary treatment. The FA composition of the lipid supplement impacted both whole-tract digestibility of FAs and FA composition of milk lipids. ARTICLE HISTORY

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Section: Discussionmentioning

confidence: 97%

Impacts of feeding lipid supplements high in palmitic acid or stearic acid on performance of lactating dairy cows

Chamberlain

DePeters

2016

Journal of Applied Animal Research

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“…1994;Romo et al 2000). Borsting et al (1992) indicated that triglyceride synthesis, which is an essential step for lipid absorption in the epithelial cell of the small intestine, is positively related to the degree of unsaturation of FA. Wu et al (1991) attributed the higher digestibility of unsaturated FA to their higher hydrophilic nature as the degree of unsaturation increases.…”

Section: Intakes and Flows Of Famentioning

confidence: 99%

Feeding micronized and extruded flaxseed to dairy cows: Effects on digestion and ruminal biohydrogenation of long-chain fatty acids

Gonthier¹,

Mustafa²,

Berthiaume³

et al. 2004

Can. J. Anim. Sci.

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Four lactating Holstein cows fitted with ruminal and duodenal cannulae were used in a 4 × 4 Latin square study to determine the effects of feeding micronized and extruded flaxseed on ruminal biohydrogenation (BH) and digestibility of fatty acids (FA) in the gastrointestinal tract. Four diets were formulated: a control diet with no flaxseed (C); a raw flaxseed diet (RF); a micronized flaxseed diet (MF); and an extruded flaxseed diet (EF). Flaxseed diets contained 126 g kg -1 flaxseed (dry matter basis). Experimental periods (n = 4) consisted of 21 d of diet adaptation and 7 d of data collection. Flaxseed supplementation increased (P < 0.05) intake of individual long-chain FA, reduced (P < 0.05) ruminal BH of total unsaturated C 18 , and increased (P < 0.05) duodenal flow of individual long-chain FA except for C 18:2 . Feeding flaxseed increased (P < 0.05) post-ruminal digestibility of C 18:1 , C 18:2, and C 18:3 and total tract digestibility of C 16:0 , C 18:2, C 18:3 , and of total long-chain FA. Heat treatment had no effect on ruminal BH, duodenal flow and digestibility of unsaturated FA. Ruminal BH of C 18:3 was higher (P < 0.05), while the duodenal flow of C 18:3 was lower (P < 0.05) for cows fed EF than for those fed MF. Intake and duodenal flow of C 16:0 were higher (P < 0.05) for cows fed MF relative to those fed EF. It was concluded that inclusion of flaxseed in dairy cow diets increased duodenal flow of polyunsaturated FA. However, heat treatments were not effective in protecting unsaturated FA from ruminal BH. . Les rations contenaient 126 g de graines de lin par kg (poids de la matière sèche). Les expériences (n = 4) ont duré 21 jours pour l'adaptation au régime plus 7 jours pour la collecte des données. Le supplément de graines de lin augmente (P < 0,05) l'absorption des AG à chaîne longue, diminue (P < 0,05) la BH des C 18 insaturés et accroît (P < 0,05) le passage des AG à chaîne longue dans le duodénum sauf les C 18:2 . Les graines de lin augmentent (P < 0,05) la digestibilité des C 18:1 , des C 18:2 et des C 18:3 après leur passage dans le rumen et la digestibilité globale des C 16:0 , des C 18:2 , des C 18:3 ainsi que des AG totaux à chaîne longue dans l'ensemble du tractus. Le conditionnement thermique n'a aucune incidence sur la BH dans le rumen, sur le débit du duodénum ni sur la digestibilité des AG insaturés. Les vaches recevant du LE présentaient une meilleure BH des C 18:3 dans le rumen (P < 0,05), mais aussi un ralentissement du passage des C 18:3 dans le duodénum (P < 0,05) comparativement à celles nourries avec du LM. Le taux d'ingestion et le débit des C 16:0 dans le duodénum sont plus élevés (P < 0,05) chez les vaches nourries de LM que chez celles recevant du LE. On en conclut qu'inclure des graines de lin à la ration des vaches laitières accélère le passage des AG polyinsaturés dans le duodénum. Toutefois, le conditionnement thermique ne permet pas de protéger les AG insaturés de la BH dans le rumen. Mots clés:Lin, bio-hydrogénation dans le rumen, acides gras, conditionnement thermi...

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“…Unsaturated fatty acids are known to solubilise Ca soaps [21,22] and to improve digestibility of all fatty acids [23].…”

Section: Effects Of Lecithins On Digestion Of Fatty Acidsmentioning

confidence: 99%

Effect of lecithins partly replacing rumen-protected fat on fatty acid digestion and composition of cow milk

Wettstein

Scheeder

Sutter

et al. 2001

Eur. J. Lipid Sci. Technol.

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Effect of lecithins partly replacing rumenprotected fat on fatty acid digestion and composition of cow milkThe effects on fatty acid digestibility and milk fat composition of calcium soaps of palm oil fatty acids and of a 25% replacement of the Ca soaps by four different lecithins (raw, deoiled and deoiled/partially hydrolysed soy lecithin, raw canola lecithin) and soybean oil were investigated in six lactating cows each. The complete diets contained the lipid supplements at proportions of 30 g fatty acids/kg dry matter. Partial replacement of Ca soaps by soy or canola lecithins and soybean oil had small but significant effects on fatty acid digestion and utilisation, as well as the fatty acid profile in milk. Relative to Ca soaps alone, C16:0 digestibility was slightly higher with lecithins, and percentage of conjugated linoleic acid and trans C18:1 in milk fat increased while proportion of C16:0 decreased. Deoiling of lecithins slightly reduced the effects on C16:0 digestibility and excretion with milk. The influence of lecithin processing was higher than the differences between raw soy and raw canola lecithin. Nevertheless, most of the few effects observed may be related to the fatty acids supplied with the lecithins but, regarding C18:1 trans-11 and odd chain fatty acids, there is some evidence that lecithins impair rumen microbial activity less than soybean oil.

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Fatty Acid Digestibility in Lactating Cows Fed Increasing Amounts of Protected Vegetable Oil, Fish Oil or Saturated Fat

Cited by 18 publications

References 25 publications

Impacts of feeding lipid supplements high in palmitic acid or stearic acid on performance of lactating dairy cows

Impacts of feeding lipid supplements high in palmitic acid or stearic acid on performance of lactating dairy cows

Feeding micronized and extruded flaxseed to dairy cows: Effects on digestion and ruminal biohydrogenation of long-chain fatty acids

Effect of lecithins partly replacing rumen-protected fat on fatty acid digestion and composition of cow milk

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