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Title: Outlook: Sorghum as a feed grain for Australian chicken-meat production
Contributor(s): Selle, Peter H (author); Moss, Amy F  (author)orcid ; Truong, Ha H (author); Khoddami, Ali (author); Cadogan, David J (author); Godwin, Ian D (author); Liu, Sonia Y (author)
Publication Date: 2018-03
Early Online Version: 2017-09-05
Open Access: Yes
DOI: 10.1016/j.aninu.2017.08.007
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Field of Research (FoR) 2008: 070204 Animal Nutrition
070202 Animal Growth and Development
Field of Research (FoR) 2020: 300303 Animal nutrition
300301 Animal growth and development
Socio-Economic Objective (SEO) 2008: 830309 Poultry
Socio-Economic Objective (SEO) 2020: 100411 Poultry
Abstract: This review is an outlook for sorghum as a feed grain for broiler chickens based on a survey of relevant stake-holders and recent research outcomes. Australian grain sorghum production will probably continue to generate a harvest in the order of 2.5 × 106 t of which some 7.9 × 105 t will be used as a feed grain for poultry and pigs. Feed grains are included primarily to provide energy from starch, but energy utilisation by broiler chickens offered sorghum-based diets is relatively inferior, because of incomplete starch digestion. Kafirin, the dominant protein fraction, ‘non-tannin’ phenolic compounds and phytate are 3 ‘starch extrinsic’ factors in sorghum that compromise starch digestibility and energy utilisation in broiler chickens offered sorghum-based diets. Kafirin concentrations in 6 sorghum varieties were negatively correlated with metabolizable energy to gross energy (ME:GE) ratios (r = −0.891; P < 0.02) or the efficiency of energy utilisation in broiler chickens. Importantly, kafirin proportions of sorghum protein may be increasing with time in Australia. If so, this represents a fundamental challenge to sorghum breeders which presumably could be met by the development of sorghum varieties with different characteristics, especially in relation to the γ- and β-kafirin fractions. White sorghum varieties contain lower polyphenol concentrations which should be advantageous as concentrations of total phenolic compounds were negatively correlated to ME:GE ratios (r = −0.838; P < 0.04) in 6 sorghum varieties. It would be desirable if more white varieties were to become available. It is suggested that responses to exogenous phytase in birds offered sorghum-based diets would be more robust if sorghum were to contain lower concentrations of kafirin and phenolic compounds. Paradoxically, while better sorghum varieties almost certainly could be developed, it may not necessarily follow that they will command a price premium from poultry and pig producers.
Publication Type: Journal Article
Source of Publication: Animal Nutrition, 4(1), p. 17-30
Publisher: Zhongguo Xumu Shouyi Xuehui [Chinese Association of Animal Science and Veterinary Medicine]
Place of Publication: China
ISSN: 2405-6545
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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