title: Feeding a diet containing resistant potato starch influences gastrointestinal tract traits and growth performance of weaned pigs.
abstract: The aim was to evaluate the effects of feeding resistant potato starch (RPS) as a natural source of resistant starch to weaned pigs for 28 d immediately after weaning. Sixty piglets (Yorkshire-Landrace × Duroc) weaned at 21 ± 2 d (1:1 male:female) with an initial BW of 7.2 ± 0.78 kg were assigned in a completely randomized design to 1 of 5 dietary treatments to give 6 observations per treatment and 2 pigs per pen. Dietary treatments consisted of a negative control corn-soybean meal-wheat-wheat middlings-based diet (NC; no antimicrobial agents added) or the NC supplemented with RPS either as powder or in capsules and each included at 0.5 or 1.0% as a top-dressing on each day. Diets were formulated to meet 1998 NRC specifications. Pigs were offered the experimental diets on an ad libitum basis for 28 d and water was available at all times. The ADG, ADFI, and G:F were determined weekly. Fecal score was determined daily for 14 d after weaning. At the conclusion of study, 1 pig from each pen was randomly selected and euthanized (n = 6 per treatment) to determine visceral organ weight, digesta pH, VFA, and ammonia N (NH3-N) concentrations. Resistant potato starch supplementation improved (P < 0.001) fecal score, and pigs offered 1.0% RPS had more solid feces (P < 0.05) than those offered 0.5% RPS during the first 14 d after weaning, independent of the form of RPS. Resistant potato starch supplementation decreased (P < 0.05) ileal and cecal digesta pH regardless of the levels of RPS or mode of delivery. The total VFA concentrations in cecal digesta were greater (P < 0.05) but the molar proportion of branched-chain fatty acids were lower (P < 0.05) for pigs fed the RPS-containing diets compared with those fed the NC, irrespective of the RPS levels or the form of RPS. However, there were no differences (P > 0.10) in visceral organ weights, growth performance, and digestibilities of DM, CP, Ca, and P among treatments. The results of this experiment indicate that supplementing a weaner pig diet with at least 0.5% RPS independent of mode of delivery has the potential to enhance outcomes characteristic of a functional gut in weaned pigs without adverse effects on growth.
authors: Department of Animal Science, University of Manitoba, Winnipeg, MB, Canada R3T 2N2 Department of Animal Science and Biotechnology, Chungnam National University, Daejeon 305-764, South Korea.
authors: J M
authors: JM
authors: Heo
authors: Department of Animal Science, University of Manitoba, Winnipeg, MB, Canada R3T 2N2.
authors: A K
authors: AK
authors: Agyekum
authors: Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan 410125, China.
authors: Y L
authors: YL
authors: Yin
authors: Department of Exercise and Nutrition Sciences, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY 14214.
authors: T C
authors: TC
authors: Rideout
authors: Department of Animal Science, University of Manitoba, Winnipeg, MB, Canada R3T 2N2 Martin.Nyachoti@umanitoba.ca.
authors: C M
authors: CM
authors: Nyachoti
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000824:Animal Nutritional Physiological Phenomena / Q000187:drug effects / Q000502:physiology; D000818:Animals; D002432:Cecum / Q000187:drug effects / Q000502:physiology; D019587:Dietary Supplements; D005243:Feces; D005260:Female; D041981:Gastrointestinal Tract / Q000187:drug effects* / Q000502:physiology; D007082:Ileum / Q000187:drug effects / Q000502:physiology; D008297:Male; D009929:Organ Size / Q000187:drug effects / Q000502:physiology; D011897:Random Allocation; D011198:Solanum tuberosum / Q000737:chemistry; D013213:Starch / Q000008:administration & dosage / Q000032:analysis / Q000494:pharmacology*; D013552:Swine / Q000254:growth & development* / Q000502:physiology; D015430:Weight Gain / Q000187:drug effects / Q000502:physiology
chemical_list: D013213:Starch
keywords: growth performance; pigs; postweaning diarrhea; resistant potato starch