Lactational performance and milk fatty acid profile of Holstein cows in response to dietary fat supplements and forage:Concentrate ratio

Kargar, S.; Ghorbani, G.R.; Alikhani, M.; Khorvash, M.; Rashidi, Ladan; Schingoethe, D.J.

doi:10.1016/j.livsci.2012.09.015

Cited by 35 publications

(33 citation statements)

References 29 publications

(75 reference statements)

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“…The Δ9-desaturase was the predominant source of the cis-9, trans-11 CLA isomer in milk, which has a number of benefits to human health (including anticarcinogenic properties). Trans-11 arising from biohydrogenation in the rumen is transferred to the mammary tissue and desaturated to cis-9, trans-11 CLA via thethe propensity of the human diet to impact the accession of coronary heart disease was reduced by fat supplementation, especially by yellow grease relative to hydrogenated palm oil [14]. F:C ration did not have effect on atherogenic index of milk fat.…”

Section: Fatty Acids Uptake By the Mammary Gland And Atherogenic Indexmentioning

confidence: 91%

“…Thus, the trans-10, cis-12 CLA is the most likely factor in milk fat depression. However, increasing the F:C ratio from 34:66 to 54:55 increased milk short chain fatty acids without effecting total milk fat CLA [14]. Therefore grain alone is responsible for milk fat depression, while mixed diets promoted the production of milk and milk protein.…”

Section: Effect Of Grain Feeding and Forage: Concentrate Ratio On Milmentioning

confidence: 92%

“…Milk fat content does not influence by the source of dietary fat. Supplementation of 2% hydrogenated palm oil or yellow grease in diet of lactating Holstein cows as source of fat improved milk fat content, and that the total fat yield increased with yellow grease compared to hydrogenated palm oil feeding [14]. The fatty acid profile of various fat/oil sources are presented in Tables 4, although there can be considerable variation in both the oil content and fatty acid profile due to botanical species and country of origin.…”

Section: Effect Of Fat Supplementsmentioning

confidence: 99%

“…F:C ration did not have effect on atherogenic index of milk fat. This index is a precise indicator of cardiovascular disease, supplementation of dairy cow diets with yellow grease resulted in a healthier milk product for consumer [14]. Chilliard and Ferlay [26] reported that tallow favorably changes the nutritional quality of milk fatty acids by a sharp reduction in their antrogenic index.…”

Section: Fatty Acids Uptake By the Mammary Gland And Atherogenic Indexmentioning

confidence: 99%

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Effect of Nutrition on Production, Composition, Fatty acids and Nutraceutical Properties of Milk

Mk¹

2015

J Adv Dairy Res

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The objective of this paper was to determine the opportunities of improving milk productivity and altering the milk composition through nutritional interventions. The increase in the nutraceutical value of milk is expected through dietary modifications of the animal. Feeding high concentrate diets combined with dietary fat can be used to modify the FA profile of milk, without negative effect on milk yield and milk fat or protein contents. Their effects may be complementary, at least for trans fatty acids. The profile of trans isomers relative to total trans-C18:1 seems dependent on the source of dietary fat. Feeding oilseeds and/ or novel fat supplements to ruminants can be used to modify the lipid metabolism in the mammary gland in modulating the secretion of fat and the profile of milk fatty acids. Feeding novel fatty acid sources the nutritive value of milk can be enhanced by decreased atherogenic saturated FA in milk and increased t 11 -C 18 : 1 (trans vaccenic acid), and c 9 ,t 11 -C 18:2 (geometric and positional isomer of conjugated linoleic acid (CLA) in milk, which are considered as positive for human health. Feeding bypass/ rumen protected sources of fatty acids and amino acids may help in meeting the need of higher milk production, and in modulating milk composition through increase availability of fatty acids and amino acids in circulation with synchronized extraction of desired nutrient by mammary gland for milk constituents synthesis. Milk may be used as delivery system of anticarcenogens (CLA and polyphenols) for human health. Therefore, nutritional manipulations have several opportunities in improving milk production, modifications of milk composition and fatty acid profile. The improved milk productivity is desired in line with increased human population with minimum environment degradation thereby nutritional manipulations are directed to enhance milk production without increasing dairy animal populations with reduced greenhouse gasses emissions from ruminant agriculture.

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Section: Fatty Acids Uptake By the Mammary Gland And Atherogenic Indexmentioning

confidence: 91%

Section: Effect Of Grain Feeding and Forage: Concentrate Ratio On Milmentioning

confidence: 92%

Section: Effect Of Fat Supplementsmentioning

confidence: 99%

Section: Fatty Acids Uptake By the Mammary Gland And Atherogenic Indexmentioning

confidence: 99%

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Effect of Nutrition on Production, Composition, Fatty acids and Nutraceutical Properties of Milk

Mk¹

2015

J Adv Dairy Res

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“…Also, SO has been shown to reduce cellulolytic bacteria, protozoal populations and total concentration of volatile fatty acids (VFA) (Yang et al, 2009). On the other hand, hydrogenated vegetable oils have been used to increase the energy content of dairy cow diets in housed (Kargar et al, 2012) and pasture systems (Schroeder et al, 2002) without effect on milk composition (Vargas-Bello-Perez et al, 2015b).…”

Section: Introductionmentioning

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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Bioactive lipid components from ruminant milk and meat

Szumacher-Strabel

El-Sherbiny

Cieślak

et al. 2015

Biotechnology of Bioactive Compounds

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Lactational performance and milk fatty acid profile of Holstein cows in response to dietary fat supplements and forage:Concentrate ratio

Cited by 35 publications

References 29 publications

Effect of Nutrition on Production, Composition, Fatty acids and Nutraceutical Properties of Milk

Effect of Nutrition on Production, Composition, Fatty acids and Nutraceutical Properties of Milk

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

Bioactive lipid components from ruminant milk and meat

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