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Type of rice fed to pigs after weaning influences apparent digestibility of starch at the ileum but not the rectum

Pluske, J.R., Montagne, L., Cavaney, F.S., Mullan, B.P., Pethick, D.W. and Hampson, D.J. (2005) Type of rice fed to pigs after weaning influences apparent digestibility of starch at the ileum but not the rectum. In: Manipulating Pig Production X. Proceedings of the Tenth Biennial Conference of the Australasian Pig Science Association (APSA), 27 - 30 November, Christchurch, New Zealand p. 18.

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Forty-eight male pigs aged 19-24 days and weighing 6.7±0.24 kg were used in a completely randomized block design with four experimental treatments and 12 pigs per treatment. Three rice-based diets with different types of cooked rice incorporated were fed: (i) medium grain (cv. Amaroo, AM); (ii) long grain (cv. Doongara, DOON) and (iii) waxy (WAXY). A fourth diet composed of a weaner diet based on wheat, barley and lupins was also given. The pigs were fed the experimental diets ad libitum for 14 days, at which time they were euthanized for digesta sample collection. Rice types AM and WAXY, having the lowest amylose to amylopectin ratio, showed superior (P=0.004) digestibility of starch at the terminal ileum than the long grain rice DOON and the commercial diet. Differences in the apparent starch digestibility between rice types were not observed in the rectum, although pigs fed diet WBL showed a lower digestibility (P<0.01). Starch digestibility in the ileum between rice types depended on the amylose to amylopectin ratio and the amount of RS but microbial fermentation in the hindgut caused total disappearance of rice starch. Digestibility of starch in pigs fed WBL was incomplete in the rectum, reflecting differences in ingredient composition and physical and chemical properties between diets.

Publication Type: Conference Paper
Murdoch Affiliation: School of Veterinary and Biomedical Sciences
Publisher: Australasian Pig Science Association
Copyright: © 2005 Australasian Pig Science Association (Inc)
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