Growth performance and nitrogen metabolism in weaned pigs fed diets containing different sources of starch |
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Authors: | TJ Li RL Huang GY Wu YC Lin ZY Jiang XF Kong WY Chu YM Zhang P Kang ZP Hou MZ Fan YP Liao YL Yin |
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Institution: | aLaboratory of Animal Nutrition and Health and Key Laboratory of subtropical Agro-ecology, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha, 410125 China bDepartment of Animal Science, Texas A&M University, College Station, TX, 77843 USA cInstitute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640 China dTanke Industry Co., Guangzhou, 510627 China eCentre for Nutrition Modelling, Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario, Canada, N1G 2W1 |
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Abstract: | This study was conducted to determine the performance and N metabolism in weaned pigs fed diets containing different sources of starch. Pigs were weaned at 28 days of age, and assigned randomly into 4 soybean meal-based diets containing different sources of starch: corn, brown rice, sticky rice, and Hi-Maize 1043 (resistant starch). There were 12 pigs per treatment group in the growth-performance trial. Additionally, a 4 × 4 Latin design was used for a nitrogen (N) balance study, with 5 days for each experimental period (n = 4). Average daily gains were 0.38, 0.34, 0.31, and 0.28 kg/day (P < 0.01), respectively, for pigs fed the corn, brown rice, sticky-rice, and Hi-Maize 1043 diets. Feed:gain ratios were 1.65, 1.78, 1.95, and 1.86 (P < 0.01), for the above 4 diets, respectively. Fecal N and urinary N excretion as well as the apparent fecal digestibility of crude protein in pigs fed the corn, brown rice, and sticky-rice diets were higher (P < 0.01) compared with pigs fed the Hi-Maize 1043 diet. Collectively, our results indicate that dietary sources of starch affected both growth performance and N utilization in weaned pigs. |
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Keywords: | Performance Nitrogen metabolism Starch Weaned pigs |
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