Alfa-tocopherol and beta-carotene in roughages and milk in organic dairy herds
Type de document
journalArticle
Langue source
Anglais
Titre français
Titre anglais
Alfa-tocopherol and beta-carotene in roughages and milk in organic dairy herds
Auteur(s)
- MOGENSEN Lisbeth
- KRISTENSEN Troels
- SØEGAARD Karen
- JENSEN Søren K.
- SEHESTED Jakob
Editeur(s)
Autre(s)
Id
S57TNGPR
Version
2599
Date ajout
21 décembre 2020 16:18
Date modification
21 décembre 2020 16:18
Résumé anglais
The aim of the present on-farm study was to analyse vitamin content in roughage at harvest and during storage and to analyze milk vitamin content when feeding the roughage to dairy cows. Roughages produced at five organic dairy farms were monitored at harvest and several times during winter as stored silage. As an average of several sampling times, roughage α-tocopherol and β-carotene contents (mg per kg DM) during the period when the roughage was fed were, respectively, 30 and 21 in grass–clover silage, 13 and 8 in maize wholecrop silage and 28 and 9 in cereal wholecrop silage. Daily intake of α-tocopherol was 876mg per cow–431mg from roughages, 89mg from concentrates and 356mg from a vitamin supplement. Milk yield was 25.9kg energy-corrected milk (ECM) per cow per day with α-tocopherol and β-carotene contents (μg/ml) of 0.82 and 0.17. The study additionally showed the following tendency, but due to few observations no final conclusions could be drawn:•For grass–clover silage there were generally no losses of vitamins during the ensiling process and during storage, but there were huge variations between farms.•For wholecrop silage there was a loss of vitamins during the ensiling process, whereas there were no further losses during the feeding period.•The output of vitamins in milk was within farm positively correlated to supply of vitamins from roughage.
Note
None
CRAW tags
- AB - Spécifique
- FREDO alimentation animale
- FREDO fourrage et prairie
- FREDO qualité des produits
- GEO Danemark
- bovin laitier
- composition nutritionnelle
- lait
- élevage
WEB tags
- dairy cows
- organic milk production
- roughage
- vitamin
- α-tocopherol
- β-carotene
Titre de la publication
Livestock Science
Volume
145
Pages
44-54
Date caractères
May 1, 2012
Date publication
1 mai 2012
Doi
10.1016/j.livsci.2011.12.021
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Issn
1871-1413
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