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Growth performance and nitrogen metabolism in weaned pigs fed diets containing different sources of starch
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  
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

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.
Keywords:Performance  Nitrogen metabolism  Starch  Weaned pigs
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