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Title: Evaluation of ground grain versus pre- and post-pellet whole grain additions to poultry diets via a response surface design
Contributor(s): Moss, Amy F  (author)orcid ; Chrystal, Peter V (author); Truong, Ha H (author); Selle, Peter H (author); Liu, Sonia Yun (author)
Publication Date: 2017-09-12
Early Online Version: 2017-08-25
Open Access: Yes
DOI: 10.1080/00071668.2017.1370698
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Abstract: 1. The objective of this study was to compare the effects of pre- and post-pellet whole grain wheat additions to diets on growth performance, gizzard and pancreas development, nutrient utilisation and starch and protein (N) digestibility coefficients in broiler chickens via an equilateral triangle response surface design. 2. The three apical treatments of the equilateral triangle comprised (1A) a standard diet containing 600 g/kg ground wheat, (2B) the same diet containing 600 g/kg pre-pellet whole wheat and (3C) the same diet containing 300 g/kg ground wheat and 300 g/kg post-pellet whole wheat. Seven blends of the three apical diets were located within the triangle to complete the design and a total of 360 male Ross 308 chicks were offered the ten experimental diets from 7 to 28 d post-hatch. Model prediction and response surface plots were generated with R 3.0.3 software. 3. The most efficient FCR of 1.466 was observed in birds offered an almost equal mixture of the pre- and post-pellet whole grain apical dietary treatments, which corresponded to 172 g/kg ground grain, 256 g/kg pre-pellet whole grain, 172 g/kg post-pellet whole grain in a diet containing 600 g/kg wheat. 4. The most efficient energy utilisation (ME:GE ratio of 0.766) was observed in birds offered a blend of the ground grain and pre-pellet whole grain apical dietary treatments which corresponded to a mixture of 384 g/kg pre-pellet whole grain and 216 g/kg ground grain. 5. Pre-pellet whole grain feeding generated the most pronounced responses in increased relative gizzard contents, reduced gizzard pH and increased relative pancreas weights. Consideration is given to the likely differences between pre- and post-pellet whole grain feeding.
Publication Type: Journal Article
Source of Publication: British Poultry Science, 58(6), p. 718-728
Publisher: Taylor & Francis
Place of Publication: United Kingdom
ISSN: 0007-1668
Field of Research (FOR): 070204 Animal Nutrition
070202 Animal Growth and Development
Socio-Economic Outcome Codes: 830309 Poultry
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article
School of Environmental and Rural Science

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