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Revision of vitamin E recommendations for ruminants in organic agriculture

Steinshamn, Håvard and Leiber, Florian (2021) Revision of vitamin E recommendations for ruminants in organic agriculture. In: Book of Abstracts of the 72nd Annual Meeting of the European Federation of Animal Science, Wageningen Academic Publishers, Wageningen, p. 489.

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Summary

Vitamin E is essential, and supplementation on top of the native tocopherol contents in feed components is often needed to meet the animal’s requirement. The recommended supplementation for ruminants may, however, be overestimated, especially in forage-based feeding systems where grazing or grass-clover silages are the basal feed with low to moderate concentrate levels in the diet (<40% of the DM intake). In such feeding regimes, which are frequent in organic animal husbandry, transfer rates for tocopherol may be higher than assumed in standard literature. We have done a systematic literature review, and critically evaluated the relationship between basal feed type and quality, forage to concentrate ratio, stage in animal production cycle, indicators of animal health and animal vitamin E status. Based on this information, we reassess dietary vitamin E requirements for cattle in organic systems. Subsequently, the revised recommendations are related to typical diet compositions of organically managed ruminants across Europe, and necessary additive supplementation levels will be estimated. The results will be presented as the basis for specific recommendations for the vitamin E supply in organic forage-based cattle husbandry.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Speech
Keywords:tocopherols, cattle, alternative agriculture, Abacus, FiBL2505406
Agrovoc keywords:
Language
Value
URI
English
tocopherols
http://aims.fao.org/aos/agrovoc/c_7798
English
cattle
http://aims.fao.org/aos/agrovoc/c_1391
English
ecological agriculture -> alternative agriculture
http://aims.fao.org/aos/agrovoc/c_28792
Subjects: Animal husbandry > Production systems > Dairy cattle
Animal husbandry > Feeding and growth
Research affiliation: European Union > Horizon 2020 > RELACS
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Animal > Animal nutrition
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Animal > Cattle
Horizon Europe or H2020 Grant Agreement Number:773431
ISSN:1382-6077
ISBN:978-90-8686-366-2
DOI:10.3920/978-90-8686-918-3
Deposited By: Steinshamn, Dr Håvard
ID Code:42826
Deposited On:06 Dec 2021 14:02
Last Modified:24 Aug 2022 09:00
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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