Distribution of α-tocopherol in early foliage samples in several forage crops

Tramontano, William A.; Ganci, David; Pennino, Marianne; Dierenfeld, Ellen S.

doi:10.1016/0031-9422(93)80013-i

Cited by 17 publications

(7 citation statements)

References 8 publications

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“…In accordance to the latter, our study demonstrated a significantly lower vitamin E content in white and red clover in relation to ryegrass. Alpha-tocopherol content in fresh white clover reported by Tramontano et al (1993) and Wichtel et al (1996) was lower than in the present study. Although Al-Mabruk et al (2004) found higher a-tocopherol concentrations in both red and white clover silages in comparison with grass silage, all values were lower than those found in the present study.…”

Section: Research Towards Factors Affecting the Vitamin E Content Of Gcscontrasting

confidence: 90%

“…In accordance to the latter, our study demonstrated a significantly lower vitamin E content in white and red clover in relation to ryegrass. Alpha‐tocopherol content in fresh white clover reported by Tramontano et al. (1993) and Wichtel et al.…”

Section: Discussionmentioning

confidence: 96%

“…Great variations among farms have been observed in vitamin E content of the ensiled forages. Possible factors of variation are differences in cut, grass/clover proportion, harvest time, wilting time, storage conditions, soil characteristics, to name but a few (Tramontano et al, 1993;Lynch et al, 2001;Mabruk et al, 2004;Mogensen et al, 2008). In accordance with literature (Hidiroglou et al, 1992;McDowell et al, 1996;Weiss et al, 1997) many feeds showed a 2-to 10-fold range in reported a-tocopherol values.…”

Section: Vitamin E Content Of Feedmentioning

confidence: 99%

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Monitoring of vitamin E status of dry, early and mid-late lactating organic dairy cows fed conserved roughages during the indoor period and factors influencing forage vitamin E levels

Beeckman

Vicca²,

Ranst³

et al. 2010

Journal of Animal Physiology and Animal Nutrition

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Analysis of blood plasma of 60 cows selected on six Flemish organic dairy farms revealed that on average 12% of all samples and on one farm up to 28% of the organic cows showed plasma vitamin E concentrations less than 3.0 μg/ml, which is considered the minimum level to avoid health risks due to vitamin E shortages. Furthermore, this study showed early lactating and dry cows to be more at risk in relation to animals in mid-late lactation. In European organic farming, vitamin supplements are only allowed if granted by the local authority to satisfy daily requirements. Therefore, the vitamin E content of the feedstuffs used on the farms was determined. Grass clover silage (GCS) and mixed silage had significantly more vitamin E than hay, maize or grain (p < 0.05) [mean (SD): 52 (35), 29 (20), 4.5 (1.7), 4.9 (4.4) and 7.1 (3.8) mg/kg DM, respectively]. Apparently, variation in the vitamin E content in the silage samples was huge. Hence, the vitamin E content of ryegrass, white and red clover was determined in a second lab scale experiment and the effects of wilting, DM content and supplementation of ensiling additives were investigated. Fresh ryegrass had a higher vitamin E content than white and red clover (p < 0.05) [156 (11.3), 49.3 (0.67) and 74.3 (5.73) μg/g DM, respectively]. These differences remained after the wilting or ensiling. Supplementation of formic acid or lactic acid bacteria at ensiling had no significant effect on the vitamin E content. Overall, it can be concluded that GCS is the most important source of vitamin E in organic dairy farming. A legal possibility for case-related supplementation should be retained in organic dairy farming as approximately 18% of all dry and early lactating cows were at risk of vitamin E shortage.

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Section: Research Towards Factors Affecting the Vitamin E Content Of Gcscontrasting

confidence: 90%

Section: Discussionmentioning

confidence: 96%

Section: Vitamin E Content Of Feedmentioning

confidence: 99%

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Monitoring of vitamin E status of dry, early and mid-late lactating organic dairy cows fed conserved roughages during the indoor period and factors influencing forage vitamin E levels

Beeckman

Vicca²,

Ranst³

et al. 2010

Journal of Animal Physiology and Animal Nutrition

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“…However, while cattle fed on pastures have been suggested to consume up to 3 g of vitamin E per day (Sheath and others ), the dietary intake of vitamin E from plants is dependent on the plant species being grazed. Leguminous species are thought to have reduced vitamin E contents compared to grasses (Tramontano and others ; Lee and others ), which can be evident when measuring meat color stability and shelf‐life. Lee and others () found beef from cows that were fed red clover silage produced a higher PUFA:SFA ratio and lower n 6: n 3 ratio compared to those fed a grass silage diet, but color declined more rapidly and was correlated with higher thiobarbituric acid‐reactive substances (TBARS) levels (6 mg/g) and lower levels of vitamin E (2 mg/g) (Lee and others ).…”

Section: Lipids and Meat Qualitymentioning

confidence: 99%

Opportunities and Implications of Pasture‐Based Lamb Fattening to Enhance the Long‐Chain Fatty Acid Composition in Meat

Howes

Bekhit

Burritt

et al. 2014

Comp Rev Food Sci Food Safe

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Health-conscious consumers following dietary fat recommendations require meat that is low in saturated fat with preferably high levels of long-chain omega-3 fatty acids. This review summarizes the influence of dietary lipids from red meat on human health and examines the potential to enhance lipid composition through pasture-feeding. The role of fatty acids in plant and ruminant metabolism is discussed to highlight the complexity of ruminal digestion when trying to enhance fatty acids in meat. Generally, ruminants that consume pasture diets have been shown to produce a more desirable fatty acid composition than those fed grain and offer potential to be further enhanced by using specific plant species. Elevated polyunsaturated fat content in meat, however, tends to increase susceptibility to oxidation, which influences other meat quality characteristics including shelf-life and color. The use of specific plant species may mitigate these negative effects due to vitamin E or other antioxidants in these plants, which protect polyunsaturated fats from oxidation. When assessing the potential of plants as a natural dietary fat source, consideration must be given to environmental influences on plant fatty acid composition to ensure consistent production of meat products with high nutritive value under a range of management practices. This review also explores the potential impact of climate change on plant fatty acid composition, and the potential implications of this for meat quality.

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“…Green fodders are a rich source of vitamin A (Chawla and Kaur 2001), vitamin E (Tramontano et al . 1993) and linolenic acid (Tyagi et al .…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the conjugated linoleic acid and vitamin A and E contents in goat milk through green fodder feeding

Tyagi

Saluja

Kathirvelan

et al. 2009

Int J of Dairy Tech

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Twelve lactating crossbred goats (Sanan × Beetal) in early lactation were divided into two groups of six each. Group I was fed on fresh berseem fodder (Trifolium alexandrinum), whereas group II was fed on berseem fodder and concentrate mixture in 1 : 1 ratio to fulfil their nutritional requirements as per National Research Council (1981). Feed intake and milk yield were recorded daily, and milk samples were collected on 0, 30, 45 and 60 days of experimental feeding for the estimation of fat, vaccenic acid, conjugated linoleic acid (CLA), vitamins A and E, and total antioxidant activity. There was no effect (P > 0.05) of dietary treatments on daily as well as total milk yield and milk fat, solids-not-fat and total solids, although average total CLA (mg/g fat) content in milk during the trial was higher(P < 0.01) in group I (18.92) in comparison to group II (10.94). Vitamin A content averaged 0.46 and 0.27 μg/mL and vitamin E, 1.20 and 1.38 μg/mL in milk of groups I and II, respectively, were higher in the berseem-fed group (P < 0.01) and total antioxidant activity of milk was also higher (P < 0.01) in group I than in group II.

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Distribution of α-tocopherol in early foliage samples in several forage crops

Cited by 17 publications

References 8 publications

Monitoring of vitamin E status of dry, early and mid-late lactating organic dairy cows fed conserved roughages during the indoor period and factors influencing forage vitamin E levels

Monitoring of vitamin E status of dry, early and mid-late lactating organic dairy cows fed conserved roughages during the indoor period and factors influencing forage vitamin E levels

Opportunities and Implications of Pasture‐Based Lamb Fattening to Enhance the Long‐Chain Fatty Acid Composition in Meat

Enhancement of the conjugated linoleic acid and vitamin A and E contents in goat milk through green fodder feeding

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