Effectiveness of Oils Rich in Linoleic and Linolenic Acids to Enhance Conjugated Linoleic Acid in Milk from Dairy Cows

Bu, Dengpan; Wang, J.Q.; Dhiman, T. R.; Liu, S.J.

doi:10.3168/jds.s0022-0302(07)71585-0

Cited by 163 publications

(228 citation statements)

References 37 publications

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“…Our results concur with those of Wu et al (1993) and Bu et al (2007) in cows. Other studies, using saturated or protected fats (Grummer, 1991;Palmquist and Beaulieu, 1993, in cows;Pérez Alba et al, 1997;Gargouri et al, 2006, in sheep), report an increase in the percentage of milk fat.…”

Section: Discussionsupporting

confidence: 83%

Effects of dietary sources of vegetable fats on performance of dairy ewes and conjugated linoleic acid (CLA) in milk

Castro

Manso

Jimeno

et al. 2009

Small Ruminant Research

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ARTICLE INFO ABSTRACT Keywords:Vegetable fats Milk performance Milk CLA Dairy eweTwo experiments were carried out to study the effects of supplementing the ration of lactating ewes with vegetable fats (sunflower oil, SO or hydrogenated palm oil, HPO; HIDROPALM®) on diet digestibility, milk yield and milk composition, and on the concentration of the conjugated linoleic acid (CLA) C18:2 cis-9 trans-11 and C18:l trans-11 (vaccenic acid, VA) and other main fatty acids in milk fat. Treatments involved a control diet, without added oil, and 2 diets supplemented with either 12g/kg SO or 12g/kg HPO on a dry matter (DM) basis. In the first experiment, 6 non-pregnant, non-lactating Lacaune ewes were used following a 3 x 3 replicated Latin Square design. Addition of vegetable fat supplement to the diet increased digestibility of DM, organic matter (OM) and crude protein (CP), but did not affect that of the ether extract (EE), neutral detergent fibre (NDF) or acid detergent fibre (ADF). In the second experiment, 60 Lacaune dairy ewes mid-way through lactation (120 ±12 days in milk, 0.98 ± 0.03 kg/day average milk yield) were divided into three equalsized groups each of which was assigned to one of the three experimental diets for4 weeks. Compared with the control treatment, supplementation with HPO increased milk yield and energy-corrected milk. But neither vegetable fat supplement modified percentages of fat and protein in milk. Supplementation with HPO increased C14:l, C16:l and C16:0 content and reduced C18:0 and C18:l cis-9 content in milk fat. Supplementation with SO increased the VA content in milk fat by 36% and that of cis-9 trans-11 CLA by 29% in comparison with the control diet. Supplementation with HPO led to milk fat with 15% more cis-9 trans-11 CLA than control milk. In conclusion, adding a moderate dose of HPO or SO to the diets increased CLA concentration in milk fat. Nevertheless, supplementation with SO was more effective than HPO in increasing CLA concentration in milk fat and reducing the atherogenicity index, improving milk quality from the human health standpoint.

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Section: Discussionsupporting

confidence: 83%

Effects of dietary sources of vegetable fats on performance of dairy ewes and conjugated linoleic acid (CLA) in milk

Castro

Manso

Jimeno

et al. 2009

Small Ruminant Research

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“…In the present study, C18:1 trans-11 and C18:2 cis-9, trans-11 (biohydrogenation intermediate isomers) were increased in rumen contents with SO compared with control and HPO. This is important for milk production because those FA can escape from the rumen and be secreted in milk as shown by Bu et al (2007) who observed increases in the C18:1 trans-11 and C18:2 cis-9, trans-11 concentrations of milk fat when dairy cows were supplemented with vegetable oils and oilseeds rich in C18:2 cis n-6.…”

Section: Discussionmentioning

confidence: 99%

Quantitative analysis of ruminal bacterial populations involved in lipid metabolism in dairy cows fed different vegetable oils

Vargas‐Bello‐Pérez

Cancino‐Padilla

Romero

et al. 2016

Animal

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Vegetable oils are used to increase energy density of dairy cow diets, although they can provoke changes in rumen bacteria populations and have repercussions on the biohydrogenation process. The aim of this study was to evaluate the effect of two sources of dietary lipids: soybean oil (SO, an unsaturated source) and hydrogenated palm oil (HPO, a saturated source) on bacterial populations and the fatty acid profile of ruminal digesta. Three non-lactating Holstein cows fitted with ruminal cannulae were used in a 3 × 3 Latin square design with three periods consisting of 21 days. Dietary treatments consisted of a basal diet (Control, no fat supplement) and the basal diet supplemented with SO (2.7% of dry matter (DM)) or HPO (2.7% of DM). Ruminal digesta pH, NH 3 -N and volatile fatty acids were not affected by dietary treatments. Compared with control and HPO, total bacteria measured as copies of 16S ribosomal DNA/ml by quantitative PCR was decreased ( P < 0.05) by SO. Fibrobacter succinogenes, Butyrivibrio proteoclasticus and Anaerovibrio lipolytica loads were not affected by dietary treatments. In contrast, compared with control, load of Prevotella bryantii was increased ( P < 0.05) with HPO diet. Compared with control and SO, HPO decreased ( P < 0.05) C18:2 cis n-6 in ruminal digesta. Contents of C15:0 iso, C18:11 trans-11 and C18:2 cis-9, trans-11 were increased ( P < 0.05) in ruminal digesta by SO compared with control and HPO. In conclusion, supplementation of SO or HPO do not affect ruminal fermentation parameters, whereas HPO can increase load of ruminal P. bryantii. Also, results observed in our targeted bacteria may have depended on the saturation degree of dietary oils.

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“…Because the lactation period is characterized by a demand for the nutrients required for milk production and is associated with a limited capacity for food intake, feeds with high nutrient content can often be used during early lactation to compensate for this lower intake and to ensure continued productivity (Bu et al 2007). …”

mentioning

confidence: 99%

Licuri oil supplements for lactating cows on pasture

et al. 2015

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(1 of licuri oil in concentrated dry matter. The intakes of dry matter, crude protein and non-fiber carbohydrate levels were not affected by the addition of licuri oil; however, the intake of neutral detergent fiber and total digestible nutrients decreased linearly. Neutral detergent fiber digestibility was reduced linearly with increasing levels of licuri oil in the concentrate. There were no changes in blood glucose levels, but blood urea nitrogen levels varied according to the time of the day when the blood was collected. Inclusion of licuri oil at 45.0 g kg (1 in feed concentrates results in improved dry matter and ether extract digestibility.

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Effectiveness of Oils Rich in Linoleic and Linolenic Acids to Enhance Conjugated Linoleic Acid in Milk from Dairy Cows

Cited by 163 publications

References 37 publications

Effects of dietary sources of vegetable fats on performance of dairy ewes and conjugated linoleic acid (CLA) in milk

Effects of dietary sources of vegetable fats on performance of dairy ewes and conjugated linoleic acid (CLA) in milk

Quantitative analysis of ruminal bacterial populations involved in lipid metabolism in dairy cows fed different vegetable oils

Licuri oil supplements for lactating cows on pasture

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