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RESEARCH ARTICLE

Maintenance of broiler performance on commercial diets diluted with copra meal and supplemented with feed enzymes

Sandy Hoffman Mael A B , Siaka Seriba Diarra https://orcid.org/0000-0002-6579-8709 B C and Ashika Devi B
+ Author Affiliations
- Author Affiliations

A Vanuatu Agriculture College and Livestock-Based Integrated Farm, Luganville, Santo, Vanuatu.

B School of Agriculture and Food Technology, The University of the South Pacific, Alafua, Samoa.

C Corresponding author. Email: siakadi2012@gmail.com, diarra_s@usp.ac.fj

Animal Production Science 60(12) 1514-1520 https://doi.org/10.1071/AN19237
Submitted: 1 May 2019  Accepted: 27 January 2020   Published: 16 April 2020

Abstract

Context: Dilution of commercial feed with moderate levels of copra meal (CM), a byproduct of coconut oil extraction, was shown to maintain broiler performance in older breeds, but reports on its use in modern fast-growing broilers are limited.

Aims: We evaluated feed dilution with CM and enzyme supplementation in broiler chickens. We hypothesised that (i) diluting commercial feed with CM will maintain performance of modern fast-growing broilers, and (ii) enzyme supplementation will improve utilisation of the diluted diets.

Methods: Experiment 1 studied the performance of growing broilers (10–21 days of age) fed commercial grower diet alone (control), or diluted with one of two levels of CM (50 and 100 g/kg) and with or without enzyme supplementation. Cobb 500 broiler chicks (10 days old), 200 in total, were assigned to five dietary treatments with four replicates, in a completely randomised design. Experiment 2 investigated higher levels of dilution (100 and 200 g CM/kg) and enzyme supplementation of commercial finisher diet in 200 finishing broilers (22–42 days of age) assigned to five treatments with four replicates each.

Key results: In Experiment 1, feed intake was reduced (P < 0.05) on the 100 g CM/kg diet without enzyme compared with 50 g CM/kg without enzyme and both of the enzyme-supplemented diets but was not different (P > 0.05) from the control. Bodyweight gain and feed conversion ratio were not affected (P > 0.05) by dietary treatment. In Experiment 2, feed intake was reduced on 200 g CM/kg with enzyme but did not differ (P > 0.05) among the control and other CM-based diets. Bodyweight gain (P < 0.05) was reduced on the 200 g CM/kg diet without enzyme compared with the 100 g CM/kg diet without enzyme. Feed : gain was not affected (P > 0.05) by diet. The relative weight of carcass and cuts, gut segments and annex organs was not affected (P > 0.05) by diet.

Conclusions: Diluting commercial grower and finisher diets with 50 and 100 g CM/kg has no adverse effects on performance of modern broilers. At higher levels of dilution (100 and 200 g/kg), enzyme supplementation may be required.

Implications: These findings will reduce the cost of broiler production and add value to CM in coconut-producing regions. We recommend more research into higher rates of dilution, sources of CM, and enzyme sources and levels that might improve performance and reduce cost of production.

Additional keywords: complex structures, exogenous enzymes, feed composition.


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