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Requirement recommendations for riboflavin in organic broilers

Leiber, F.; Quander-Stoll, N.; Ayrle, H.; Amsler, Z.; Maurer, V.; Leopold, J.; Damme, K. and Lambertz, C. (2021) Requirement recommendations for riboflavin in organic broilers. In: Book of Abstracts of the 72nd Annual Meeting of the European Federation of Animal Sciences. Davos, Switzerland. 30 August - 3 September 2021, Wageningen Academic Publishers, The Netherlands, no. 27, p. 493.

[thumbnail of Leiber-etal-2021-EAAPBookofAbstracts-Vol27-p493.pdf] PDF - English


GMO-free riboflavin is required for organic broiler diets. Currently it is produced by only one German manufacturer at high price. The recommended dosages are based on outdated studies, and current studies are rare. Due to high costs of GMO-free produced riboflavin, an accurate assessment of the requirement in poultry is of economic relevance. Furthermore, specific requirement recommendations for organic poultry do not exist. In the organic sector, slowgrowing genotypes are used and diet composition partly differs from conventional systems. Both may influence riboflavin requirements. Four trials with riboflavin supplementations between 3.3 and 9.6 mg/kg feed DM in one- to three-phase feeding were conducted to identify the essential minimum amount of riboflavin supplements. The riboflavin source used was a GMO-free yeast strain (Ashbya gossypii). Across all experiments, the lowest dosages (2.5; 3.3; 3.5 mg/kg) resulted in lower performances and partly deficiency symptoms. Supplementation of 4.5 mg/kg feed DM was found to be a safe lower threshold. It was shown that an adequate supply is particularly important in the first phase of life, as certain early performance deficits cannot be compensated subsequently. A three-phase dosage gradation of 6.37; 5.28; 4.22 mg/kg for starter, grower and finisher diets, respectively, proved to be particularly suitable for generating best performance (feed conversion and efficiency). In conclusion, a general minimal supplementation of 4.5 mg/kg feed DM (as compared to 8-10 mg/kg starter feed and 6-8 mg/kg finisher feed currently used in the EU) is recommended for slow-growing broiler chicken in organic agriculture. Phase grading can improve efficient riboflavin use. Furthermore, the use of riboflavin-rich feed components such as yeast, whey and milk powder, alfalfa meal and grass meal or silages is recommended for on-farm feed mixtures.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Keywords:broiler chickens, riboflavin, animal health, animal feeding, poultry, Abacus, FiBL2505406
Agrovoc keywords:
broiler chickens
animal health
animal feeding
Subjects: Animal husbandry > Feeding and growth
Animal husbandry > Health and welfare
Animal husbandry > Production systems > Poultry
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Animal > Animal nutrition
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Animal > Poultry
Deposited By: Forschungsinstitut für biologischen Landbau, FiBL
ID Code:43299
Deposited On:13 Jan 2022 11:16
Last Modified:24 Aug 2022 09:02
Document Language:English
Refereed:Peer-reviewed and accepted

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