Effect of ileum segment and protein sources on net disappearance of crude protein and amino acids in laying hens

British Poultry Science
M RezvaniM Rodehutscord

Abstract

1. This study investigated the net disappearance of crude protein (CP) and amino acids (AA) from soybean meal and rapeseed meal in different sub-sections of the ileum of hens. A basal diet was used and in another 4 diets, maize starch contained in the basal diet was replaced with soybean meal or rapeseed meal at 140 and 280 g/kg so that changes in dietary AA concentrations resulted from the oilseed meals only. 2. A total of 250 Lohmann Brown pullets were used for this experiment at 20 weeks old and given one of the 5 diets for 7 d. The section between Meckel's diverticulum and 2 cm anterior to the ileo-caecal-colonic junction was taken after slaughtering the hens and cut into three sub-sections of equal length. Digesta were taken separately from each sub-section and then frozen. Net disappearance of AA and CP for the diets and the two protein sources was calculated based on standard equations and using a multiple linear regression approach. 3. Net disappearances of CP and all AA were significantly lower in the proximal sub-section than in the central and terminal sub-sections. Also, the net disappearance of CP and all AA from rapeseed meal was significantly lower in the proximal sub-section than in the central or terminal sub-s...Continue Reading

References

Apr 30, 2004·British Poultry Science·M RodehutscordA Dieckmann
Dec 30, 2004·British Poultry Science·S PalanderI Ala-Fossi
Dec 3, 2005·Archives of Animal Nutrition·Holger KluthMarkus Rodehutscord

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Citations

Jul 23, 2014·Asian-Australasian Journal of Animal Sciences·C Kong, O Adeola
Sep 2, 2021·Animal Nutrition·Jessica de Souza VilelaIsabelle Ruhnke

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