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An estimate of the leucine requirement for young pigs

Published online by Cambridge University Press:  18 August 2016

N. R. Augspurger  and
D. H. Baker
N. R. Augspurger
Affiliation:
Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana, IL 61801, USA
D. H. Baker*
Affiliation:
Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana, IL 61801, USA
*
‡Corresponding author. E-mail:dhbaker@uiuc.edu
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Abstract

Three pig trials were done to estimate an objective requirement of young (10 to 20 kg) pigs for leucine (Leu). Within each trial, four or five replicates of five pigs were given ad libitum access to their experimental diet for a period of 21 (trial 1) or 19 days (trials 2 and 3). A Leu-deficient diet (177 g crude protein per kg) based on maize, peanut meal, lactose, sucrose, dried whey, maize starch, soya-bean meal (SBM), and gelatin was used in these trials. Trial 1 showed that the Leu-deficient diet supplemented with Leu produced responses in weight gain and gain/food ratio that were similar (P > 0·10) to that obtained from a maize-SBM-whey positive-control diet containing 213 g crude protein (CP) per kg. Trials 2 and 3 utilized graded levels of crystalline L-Leu to determine the minimal Leu requirement in young pigs. Both trials showed linear increases (P < 0·05) in weight gain and gain/food as a result of Leu supplementation. Closer examination of the data revealed no significant change in gain/food or PUN responses above 11·2 g/kg total Leu in trial 2, or in weight gain or PUN values above 11·5 g/kg total Leu in trial 3. These data indicate that the Leu requirement of young pigs is probably not greater than 11·5 g/kg (10·5 g/kg true digestible), which equates to approximately 0·72 g true digestible Leu per MJ metabolizable energy. The ideal ratio of Leu to Lys appears to be close to 1: 1 for pigs in the weight range of 10 to 20 kg.

Keywords

leucinepigs
Type
Non-ruminant nutrition, behaviour and production
Information
Animal Science , Volume 79 , Issue 1 , August 2004 , pp. 149 - 153
Copyright
Copyright © British Society of Animal Science 2004

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References

Agricultural Research Council. 1981. The nutrient requirements of pigs. Commonwealth Agricultural Bureaux, Farnham Royal, Slough.Google Scholar
Association of Official Analytical Chemists. 1995. Official methods of analysis, 16th edition. AOAC, Washington, DC.Google Scholar
Baker, D. H. and Mavromichalis, I. 2000. The role of branched-chain amino acids in swine and poultry nutrition. Biokyowa technical review no. 12, pp. 1–20.Google Scholar
Chung, T. K. and Baker, D. H. 1991. A chemically-defined diet for maximal growth rate in pigs. Journal of Nutrition 121: 979–984.CrossRefGoogle Scholar
Chung, T. K. and Baker, D. H. 1992a. Ideal amino acid pattern for 10-kilogram pigs. Journal of Animal Science 70: 3102–3111.Google Scholar
Chung, T. K. and Baker, D. H. 1992b. Apparent and true digestibility of a crystalline amino acid mixture and of casein: comparison of values obtained with ileal-cannulated pigs and cecectomized cockerels. Journal of Animal Science 70: 3781–3790.Google Scholar
D’Mello, J. P. F. 1994. Amino acid imbalances, antagonisms and toxicities. In Amino acids in farm animal nutrition (ed. D’Mello, J. P. F.). CAB International., Wallingford.Google Scholar
Edmonds, M. S. and Baker, D. H. 1987. Amino acid excesses for young pigs: effects of excess methionine, tryptophan, threonine, or leucine. Journal of Animal Science 64: 1664–1671.CrossRefGoogle ScholarPubMed
Figueroa, J. L., Lewis, A. J., Miller, P. S., Fischer, R. L. and Diedrichsen, R. M. 2003. Growth, carcass traits, and plasma amino acid concentrations of gilts fed low-protein diets supplemented with amino acids including histidine, isoleucine, and valine. Journal of Animal Science 81: 1529–1537.Google Scholar
Han, Y. and Parsons, C. M. 1990. Determination of available amino acid and energy in alfalfa meal, feather meal and poultry by-products by various methods. Poultry Science 69: 1544–1552.Google Scholar
Mavromichalis, I., Kerr, B. J., Parr, T. M., Albin, D. M., Gabert, V. M. and Baker, D. H. 2001. Valine requirement of nursery pigs. Journal of Animal Science 79: 1223–1229.Google Scholar
Mavromichalis, I., Webel, D. M., Emmert, J. L., Moser, R. L. and Baker, D. H. 1998. Limiting order of amino acids in a low-protein corn-soybean meal-whey-based diet for nursery pigs. Journal of Animal Science 76: 2833–2837.CrossRefGoogle Scholar
National Research Council. 1994. Nutrient requirements of poultry, ninth edition. National Academy Press, Washington, DC.Google Scholar
National Research Council. 1998. Nutrient requirements of swine, 10th edition. National Academy Press, Washington, DC.Google Scholar
Parr, T. M., Kerr, B. J. and Baker, D. H. 2003. Isoleucine requirement of growing (25 to 45 kg) pigs. Journal of Animal Science 81: 745–752.Google Scholar
Parr, T. M., Kerr, B. J. and Baker, D. H. 2004. Isoleucine requirement of late-finishing (87 to 100 kg) pigs. Journal of Animal Science 82: 1331–1338.Google Scholar
Robbins, K. R., Norton, H. W. and Baker, D. H. 1979. Estimation of nutrient requirements from growth data. Journal of Nutrition 109: 1710–1714.Google Scholar
Smith, T. K. and Austic, R. A. 1978. The branched-chain amino acid antagonism in chicks. Journal of Nutrition 108: 1180–1191.Google Scholar
Steel, R. G. D., Torrie, J. H. and Dickey, D. A. 1997. Principles and procedures of statistics. A biometrical approach, third edition. McGraw-Hill Publishing Co., New York.Google Scholar