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An analysis of the hypothesis that amino acid requirements for chicks should be stated as a proportion of dietary protein

Published online by Cambridge University Press:  18 September 2007

T.R. Morris ,
R.M. Gous  and
C. Fisher
T.R. Morris*
Affiliation:
Department of Agriculture, University of Reading, Earley Gate, Reading RG6 6AT, UK
R.M. Gous
Affiliation:
Department of Animal and Poultry Science, University of Natal, Pietermaritzburg, South Africa
C. Fisher
Affiliation:
Leyden Old House, Kirknewton, Midlothian EH27 8DO, UK
*
*Correspondence to Professor T.R. Morris.
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Abstract

This is a review of previously published data from experiments designed to measure the chicks' requirement for an essential amino acid in diets containing surplus protein (generally in the range 220–300 g crude protein (CP)/kg diet). The evidence shows that, within this range, the requirement for a first limiting amino acid increases nearly in direct proportion to the CP content of the diet. To explain this, the following possibilities are considered: (1) that energy supply was limiting the response to a critical amino acid, (2) that the experiments were conducted in environments which limited heat disposal by the chicks, (3) that results from the trials have been misinterpreted because growth rate rather than protein deposition was used as a response measure, (4) that the availability of amino acids in the diets was lower than had been assumed, (5) that nutrients other than the amino acid under study were limiting performance, and (6) that there was an imbalance of amino acids in the diet. It is concluded that only the last explanation fits the facts. The imbalances reported have led to a decline in the efficiency of the utilisation of the first limiting amino acid in some instances. The depressed growth observed with a high-protein diet limiting in one essential amino acid could not be attributed to lowered feed intake in most cases. The imbalance is, in these respects, different from classical imbalances which result from loading the diet with a mixture of essential amino acids. From the evidence reviewed, some doubt is cast on the validity of the dilution method for estimating amino acid requirements; nevertheless it its concluded that the dilution method remains the most trustworthy procedure for making estimates to be used in practical diet formulation. It is recommended that, in future, programmes for diet formulation should be modified to prevent surplus protein being permitted in the solution, unless a proportional adjustment is made to the minima prescribed for amino acids likely to be present in limiting proportions.

Keywords

Proteinamino acid balancechick growthamino acid requirement
Type
Research Article
Information
World's Poultry Science Journal , Volume 55 , Issue 1 , March 1999 , pp. 7 - 22
Copyright
Copyright © Cambridge University Press 1999

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References

Abebe, S. and Morris, T.R. (1990a) A note on the effects of protein concentration on response to dietary lysine by chicks. British Poultry Science 31: 267–272CrossRefGoogle ScholarPubMed
Abebe, S. and Morris, T.R. (1990b) Effects of protein concentration on responses to dietary tryptophan by chicks. British Poultry Science 31: 255–260CrossRefGoogle ScholarPubMed
Almquist, H.J. (1952) Amino acid requirements of chickens and turkeys – a review. Poultry Science 31: 969–981CrossRefGoogle Scholar
Barbour, G., Latshaw, J.D. and Bishop, B. (1993) Lysine requirement of broiler chicks as affected by protein source and method of statistical evaluation. British Poultry Science 34: 747–756CrossRefGoogle ScholarPubMed
Boomgaardt, J.O. and Baker, D.H. (1971) Tryptophan requirement of growing chickens as affected by dietary protein level. Journal of Animal Science 33: 595–599CrossRefGoogle ScholarPubMed
Boomgaardt, J.O. and Baker, D.H. (1973) The lysine requirement of growing chicks fed sesame meal-gelatin diets at three protein levels. Poultry Science 52: 586–591CrossRefGoogle Scholar
Boorman, K.N. (1992) Protein quality and amino acid utilisation in poultry. In: Recent Advances in Animal Nutrition – 1992 (Garnsworthy, P.C., Haresign, W. and Cole, D.J.A., Eds), Butterworth-Heinemann, Oxford, pp. 51–70CrossRefGoogle Scholar
Boorman, K.N. and Burgess, A.D. (1986) Responses to amino acids. In: Nutrient Requirements of Poultry and Nutritional Research (Fisher, C. and Boorman, K.N., Eds), Butterworths, London, pp. 99–123Google Scholar
Boorman, K.N. and Ellis, G.M. (1996) Maximum nutritional response to poor-quality protein and amino acid utilisation. British Poultry Science 37: 145–156CrossRefGoogle ScholarPubMed
Burnham, D.Emmans, G.C. and Gous, R.M. (1992) Isoleucine requirements of the chicken: the effect of excess leucine and valine on the response to isoleucine. British Poultry Science 33: 71–87CrossRefGoogle ScholarPubMed
D'mello, J.F.P. (1975) Amino acid requirements of the young turkey: leucine, isoleucine and valine. British Poultry Science 16: 607–615CrossRefGoogle Scholar
D'mello, J.F.P. (1988) Dietary interactions influencing amino acid utilisation by poultry. World's Poultry Science Journal 44: 92–102CrossRefGoogle Scholar
D'mello, J.F.P. (1990) Lysine utilisation by broiler chicks. In: Proceedings of VIII European Poultry ConferenceBarcelona, Spain pp. 302–305Google Scholar
D'mello, J.F.P. and Lewis, D. (1970) Amino acid interactions in chick nutrition. 3. Interdependence in amino acid requirements. British Poultry Science 11: 367–385CrossRefGoogle ScholarPubMed
Donaldson, W.E., Combs, G.F. and Romoser, G.L. (1956) Studies on energy levels in poultry rations. 1. The effect of calorie:protein ratio of the ration on growth, nutrient utilization and body composition of chicks. Poultry Science 35: 1100–1105CrossRefGoogle Scholar
Edwards, A.C. and Campbell, R.G. (1991) Energy-protein interactions in pigs. In: Recent Advances in Animal Nutrition – 1991 (Haresign, W. and Cole, D.J.A., Eds), Butterworth-Heinemann, Oxford, pp. 3–19CrossRefGoogle Scholar
Emmans, G.C. (1991) Diet selection by animals: theory and experimental design. Proceedings of the Nutrition Society 50: 59–64CrossRefGoogle Scholar
Fisher, C., Griminger, P., Leveille, G.A. and Shapiro, R. (1960) Quantitative aspects of lysine deficiency and amino acid imbalance. Journal of Nutrition 71: 213–220CrossRefGoogle ScholarPubMed
Fisher, C. and Morris, T.R. (1970) The determination of the methionine requirement of laying pullets by a diet dilution technique. British Poultry Science 11: 67–82CrossRefGoogle Scholar
Gous, R.M. and Morris, T.R. (1985) Evaluation of a diet dilution technique for measuring the response of broiler chickens to increasing concentrations of lysine. British Poultry Science 26: 147–161CrossRefGoogle ScholarPubMed
Grau, C.R. (1948) Effect of protein level on the lysine requirement of the chick. Journal of Nutrition 36: 99–108CrossRefGoogle ScholarPubMed
Harper, A-E.Benevenga, N.J. and Wohlheuter, R.M. (1970) Effects of ingestion of disproportionate amounts of amino acids. Physiological Reviews 50: 428–558CrossRefGoogle ScholarPubMed
HÄrtel, H. (1970) Erganzungsbedarf con Broilerrationen an Methionin bei Verwendung von Sojaschrot als alleininger Proteinquelle. Archiv für Geflugelkunde 34: 173–181Google Scholar
Hurwitz, S., Sklan, D., Talpaz, H. and Palvnik, I. (1998) The effect of dietary protein level on the lysine and arginine requirements of growing chicks. Poultry Science 77: 689–696CrossRefGoogle Scholar
Huyghebaert, G. and Pack, M. (1996) Effects of dietary protein content, addition of nonessential amino acids and dietary methionine to cysteine balance on responses to dietary sulphur-containing amino acids in broilers. British Poultry Science 37: 623–639CrossRefGoogle ScholarPubMed
Kyriazakis, I. and Emmans, G.C. (1992) The effects of varying protein and energy intakes on the growth and body composition of pigs. 2. The effects of varying both energy and protein intake. British Journal of Nutrition 68: 615–625CrossRefGoogle ScholarPubMed
Macleod, M.G. (1997) Effects of amino acid balance and energy:protein ratio on energy and nitrogen metabolism in male broiler chickens. British Poultry Science 38: 405–411CrossRefGoogle ScholarPubMed
Mendonca, C.X. and Jensen, L.S. (1989) Influence of protein concentration on the sulphur– containing amino acid requirement of broiler chickens. British Poultry Science 30: 889–898CrossRefGoogle Scholar
Morris, T.R. and Abebe, S. (1990) Effects of arginine and protein on chicks' responses to dietary lysine. British Poultry Science 31: 261–266CrossRefGoogle ScholarPubMed
Morris, T.R. and Njuru, D. (1990) Protein requirement of fast– and slow-growing chicks. British Poultry Science 31: 803–809CrossRefGoogle ScholarPubMed
Morris, T.R., Alazzawi, K., Gous, R.M. and Simpson, G.L. (1987) Effects of protein concentration on responses to dietary lysine by chicks. British Poultry Science 28: 185–195CrossRefGoogle ScholarPubMed
Morris, T.R., Gous, R.M. and Abebe, S. (1992) Effects of dietary protein concentration on the response of growing chicks to methionine. British Poultry Science 33: 795–803CrossRefGoogle ScholarPubMed
Moundras, C., Remesey, C. and Demigne, C. (1993) Dietary protein paradox: decrease of amino acid availability induced by high protein diets. American Journal of Physiology 264: G1057–G1065Google ScholarPubMed
Negassi, A. and Morris, T.R. (1973) Evaluation of noog meal in chick diets. World's Poultry Science Journal 29: 29Google Scholar
Nelson, T.S., Young, R.J., Bradfield, R.B., Anderson, J.B., Norris, LC., Hill, F.W. and Scott, M.L. (1960) Studies on the sulfur amino acid requirements of the chick. Poultry Science 39: 308–314CrossRefGoogle Scholar
Robbins, K.R. (1987) Threonine requirement of the broiler chick as affected by protein level and source. Poultry Science 66: 1531–1534CrossRefGoogle ScholarPubMed
Rosenberg, H.R. and Baldini, J.T. (1957) Effect of dietary protein level on the methionine energy relationship in broiler diets. Poultry Science 36: 247–252CrossRefGoogle Scholar
Seaton, K.W., Thomas, O.P., Gous, R.M. and Bossard, E.H. (1978) The effect of diet on liver glycogen and body composition in the chick. Poultry Science 57: 692–698CrossRefGoogle ScholarPubMed
Wethli, E., Morris, T.R. and Shreshta, T.P. (1975) The effect of feeding high levels of low quality proteins to growing chickens. British Journal of Nutrition 34: 363–373Google ScholarPubMed