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Apparent metabolisable energy and ileal crude protein digestibility of various treated palm kernel cake based diets for heat-stressed broiler chickens


Citation

Mohd Ali Hanafiah, Muhamad Hakim and Idrus, Zulkifli and Farjam, Abdoreza Soleimani and Awad, E. A. (2017) Apparent metabolisable energy and ileal crude protein digestibility of various treated palm kernel cake based diets for heat-stressed broiler chickens. European Poultry Science, 81. ISSN 1612-9199

Abstract

A digestibility trial was conducted to determine the apparent metabolisable energy (AME) and apparent ileal digestibility (AID) of crude protein in broilers fed various treated palm kernel cake (PKC) based diets under unheated and heated conditions. A total of 240 day-old female broiler chicks (Cobb 500) were randomly distributed to 60 battery cages in environmentally controlled rooms and fed standard broiler diets from day 1 to 28. From day 29 to 35, chickens were assigned to one of the following 6 diets: (1) 25% untreated PKC, (2) 25% shell-less PKC (SPKC), (3) 25% enzyme treated PKC (EPKC), (4) 25% extruded PKC (XPKC), (5) 25% extruded shell-less PKC (XSPKC) or (6) 0% PKC (control). From day 29–35, equal numbers of birds from each diet were exposed to either 24 ± 1°C (unheated) or 34 ± 1°C for 6 h daily (heated). No significant diet × temperature interactions were observed for AME or AID of CP. Regardless of temperature, XPKC, XSPKC, SPKC and EPKC significantly increased the AME values by 16, 29, 31 and 35%, respectively compared to untreated PKC. In comparison to untreated PKC, the AID of CP was also significantly increased in EPKC (33%), SPKC (29%) and XSPKC (26%) but not in XPKC. Irrespective of diet, heat-stressed birds had significantly lower AME and AID of CP compared to the unheated group. These results showed that enzyme supplementation and shell removal treatments improved both AME and AID of CP of the PKC. However, extrusion improved AME but not AID of CP.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Agriculture
Halal Products Research Institute
Institute of Tropical Agriculture and Food Security
DOI Number: https://doi.org/10.1399/eps.2017.198
Publisher: Verlag Eugen Ulmer, Stuttgart
Keywords: Broiler; Nutrition; Heat stress; Palm kernel cake; Extrusion; Enzyme supplementation; Nutrient digestibility
Depositing User: Nida Hidayati Ghazali
Date Deposited: 25 Mar 2019 01:31
Last Modified: 25 Mar 2019 01:31
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1399/eps.2017.198
URI: http://psasir.upm.edu.my/id/eprint/60902
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