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Alpha-tocopherol and b-carotene in legume–grass mixtures as influenced by wilting, ensiling and type of silage additive

Lindqvist, H.; Nadeau, E. and Jensen, S.K. (2011) Alpha-tocopherol and b-carotene in legume–grass mixtures as influenced by wilting, ensiling and type of silage additive. Grass and Forage Science, 67 (1), pp. 119-128.

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Summary

Effects of wilting, ensiling and type of additive on atocopherol and b-carotene contents in legume–grass mixtures were examined. Swards of birdsfoot trefoil + timothy (Bft + Ti), red clover + timothy (Rc + Ti) and red clover + meadow fescue (Rc + Mf) were harvested as a first regrowth in August 2005. Forage was wilted to a dry-matter (DM) content of 273 g kg)1 and ensiled without additive or with an inoculant or acid. Wilting decreased a-tocopherol concentration by 30% in the Bft + Ti mixture (P = 0x015). Untreated Bft + Ti silage had higher a-tocopherol content than red clover silages (56x9 vs. 34x2 mg kg)1 DM; P = 0x015). The a-tocopherol concentration of Bft + Ti silages increased during ensiling from 41x1 mg kg)1 DM in wilted herbage to 56x9, 65x2 and 56x8 mg kg)1 DM in untreated, inoculated and acid-treated silage respectively (P = 0x015). The inoculant increased a-tocopherol content in the red clover silages (50x1 vs. 34x21 mg kg)1 DM; P = 0x015) compared with untreated red clover silages. Red clover mixtures had lower b-carotene content than Bft + Ti (32Æ3 vs. 46x2 mg kg)1 DM; P = 0x016), averaged over treatments. In conclusion, wilting had small effects but the use of bacterial inoculant as an additive and a Bft + Ti mixture increased a-tocopherol concentration in the silage.


EPrint Type:Journal paper
Keywords:a-tocopherol, b-carotene, legume, grass, ensiling, additive
Subjects: Crop husbandry > Production systems > Pasture and forage crops
Research affiliation: Denmark > DARCOF III (2005-2010) > ECOVIT - Improved health in organic milk production
DOI:10.1111/j.1365-2494.2011.00827.x
Deposited By: Kirkegaard, Lene/LKI
ID Code:19452
Deposited On:06 Oct 2011 07:54
Last Modified:28 May 2013 12:45
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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