Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 352319
Title Dioxins in organic eggs: a review
Author(s) Vries, M. de; Kwakkel, R.P.; Kijlstra, A.
Source NJAS Wageningen Journal of Life Sciences 54 (2006)2. - ISSN 1573-5214 - p. 207 - 221.
Department(s) Animal Production Systems
Animal Nutrition
Wageningen Livestock Research
Publication type Refereed Article in a scientific journal
Publication year 2006
Keyword(s) dioxinen - toxicologie - eieren - bodemchemie - diervoedering - biologische landbouw - kwaliteitsnormen - dioxins - toxicology - eggs - soil chemistry - animal feeding - organic farming - quality standards - dibenzo-p-dioxins - adaptive significance - chickens - tissue - soil - 2,3,7,8-tetrachlorodibenzo-p-dioxin - bioaccumulation - biotransfer - metabolism - excretion
Categories Toxicity of Pesticides
Abstract Eggs contribute for about 4% to the daily dioxin intake of humans. Research among layer farms in the Netherlands and other EU countries has shown that organic eggs contain more dioxin than conventional ones and that a significant number of organic farms produce eggs with a dioxin content that exceeds the EU standard. The hens' intake of dioxins from various sources leads to an increase in the dioxin content of organic eggs. These sources include plants, feed, soil, worms and insects, and compared with hens on conventional and free-range farms, organic hens make more use of these sources due to better access to the outdoor run. Plants appear to be relatively unimportant as a source of dioxins. Also commercial organic feed generally has very low dioxin contents, but not much is known about non-commercial feed. Consumption of worms and insects and particularly ingestion of soil are important causes of high dioxin levels in eggs. Management interventions, like a reduction of the time the hens spend outside, may decrease the dioxin levels in organic eggs but at the same time may interfere with the image of the organic production systems
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