Acknowledgements Book of abstracts - Publicaties - Vlaanderen.be
Acknowledgements Book of abstracts - Publicaties - Vlaanderen.be
Acknowledgements Book of abstracts - Publicaties - Vlaanderen.be
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Petra Philipps presents Poster 68 during the poster sessions in the Aula.<br />
Session theme 6: Free topics<br />
140<br />
Poster 68<br />
EFFECTS OF 25-HYDROXY-CHOLECALCIFEROL AND A PENIOPHORA<br />
LYCII PHYTASE ON THE TIBIA QUALITY IN BROILER CHICKENS<br />
P. Philipps 1 , R. Aureli 1 , F. Fru 1 , M. Wiemann 2 , G. We<strong>be</strong>r 2<br />
1<br />
DSM Nutritional Products France, Research Centre for Animal Nutrition, Health, Saint Louis Cedex,<br />
France<br />
2<br />
DSM Nutritional Products Ltd, P.O. Box 2676, CH-4303 Kaiseraugst, Switzerland<br />
Modern broilers are selected for rapid growth which is linked with increased muscle growth while<br />
the skeleton remains more or less unchanged. Therefore skeletal disorders do occur more <strong>of</strong>ten in<br />
modern broiler production and impact animal welfare as mobility <strong>of</strong> the birds is reduced. The<br />
supplementation <strong>of</strong> broiler diets with feed additives such as phytase or 25-hydroxy-cholecalciferol<br />
could influence bone metabolism resulting in <strong>be</strong>tter bone quality. Improved bone resistance is<br />
important for improving animal welfare at farm level with the aim to avoid leg problems and<br />
mortality.<br />
Therefore effects <strong>of</strong> 25-hydroxy-cholecalciferol and a phytase on growth performance, utilization <strong>of</strong><br />
Calcium /Phosphorus and bone mineralization in broiler chickens fed basal diets low in phosphorus<br />
content (4.1 g/kg feed) were studied in a short term trial from day 8 to 22.<br />
576 male ROSS chickens were fed pellet diets based on maize and soy<strong>be</strong>an meal. Three different<br />
basal diets were prepared with 200, 500 and 2000 IU <strong>of</strong> vitamin D3/kg (ROVIMIX D3-500),<br />
respectively. Beside the control treatments, the animals received the basal diets supplemented with<br />
69 µg 25-hydroxy-cholecalciferol (Hy•D®), 750 U Peniophora lycii phytase (RONOZYME®<br />
P5000) per kg feed or a combination <strong>of</strong> both products, respectively. Each treatment was replicated<br />
with 6 groups.<br />
At levels <strong>of</strong> 200 IU and 2000 IU vitamin D3 per kg feed, the inclusion <strong>of</strong> both 25-hydroxycholecalciferol<br />
and the combination <strong>of</strong> 25-hydroxy-cholecalciferol and phytase significantly<br />
(p
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