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Reducing Vitamin B2 supplements for laying hens is possible in organic systems (Relacs Practice Abstract)


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{Tool} Reducing Vitamin B2 supplements for laying hens is possible in organic systems (Relacs Practice Abstract). Creator(s): Leiber, Florian; Holinger, Mirjam and Ayrle, Hannah. Issuing Organisation(s): FiBL - Research Institute of Organic Agriculture. Relacs Practice Abstract, no. 02. (2020)

[img] Microsoft Word - English (Reducing Vitamin B2 supplements for laying hens is possible in organic systems)
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Online at: https://orgprints.org/38027/


- Laying performance (always close to 100%), body weight development and health and welfare indicators did not differ between the three feeding treatments.
- Egg quality parameters (weight, stability of the eggshell and colour of the yolk) were also not affected by the reduc-tion of vitamin B2 supplements.
- However, the vitamin B2 concentrations in the egg yolks and livers of the 1.5mg/kg-treatment group declined by week 7 compared to the other two treatments.
- Subsequently, the values remained stable until the end of the experiment in week 18.
- We therefore conclude that despite the declining vitamin B2 concentrations in the yolks and livers of the hens sup-plemented with only 1.5 mg/kg feed, this level was sufficient with regard to animal health, welfare and performance.
- The results for the 3 mg/kg-treatment were always equal those of the 4.5mg/kg supplement treatment.
- Therefore, we consider it safe to reduce the amount of vitamin B2 supplements in layers’ feed to 3 mg/kg in organic feeding conditions.

EPrint Type:Practice tool
What problem does the tool address?:Vitamin B2 (Riboflavin) from GMO-free sources is needed in organic poultry feeding. Recently, a serious delivery gap for this vitamin oc-curred, which shows the necessity to develop new ways of produc-ing GMO-free Vitamin B2.
What solution does the tool offer?:Part of the solution would be to decrease the recommended levels of B2 supplements added to animal feed to reduce feed production costs and dependency on external sources.
Type of Practice Tool:Practice abstracts
Keywords:feeding, vitamins, poultry, layer chickens, feed safety, riboflavin
Agrovoc keywords:
Englishfeed safetyhttp://aims.fao.org/aos/agrovoc/c_1410352829602
Englishlayer chickenshttp://aims.fao.org/aos/agrovoc/c_12109
Subjects: Animal husbandry > Feeding and growth
Animal husbandry > Production systems > Poultry
Research affiliation: European Union > Horizon 2020 > RELACS
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Animal Health
H2020 or FP7 Grant Agreement Number:773431
Related Links:https://orgprints.org/38027/, https://organic-farmknowledge.org/tool/38027
Project ID:oknet
Deposited By: Forschungsinstitut für biologischen Landbau, FiBL
ID Code:38027
Deposited On:18 May 2020 10:17
Last Modified:26 May 2020 08:45
Document Language:English

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