Indian Journal of Animal Research

  • Chief EditorK.M.L. Pathak

  • Print ISSN 0367-6722

  • Online ISSN 0976-0555

  • NAAS Rating 6.50

  • SJR 0.263

  • Impact Factor 0.5 (2023)

Frequency :
Monthly (January, February, March, April, May, June, July, August, September, October, November and December)
Indexing Services :
Science Citation Index Expanded, BIOSIS Preview, ISI Citation Index, Biological Abstracts, Scopus, AGRICOLA, Google Scholar, CrossRef, CAB Abstracting Journals, Chemical Abstracts, Indian Science Abstracts, EBSCO Indexing Services, Index Copernicus
Indian Journal of Animal Research, volume 52 issue 4 (april 2018) : 559-563

Effect of different levels of dietary crude protein on the growth performance and carcass characteristics of commercial broilers at different phases of growth

T. Srilatha, V. Ravinder Reddy, V. Chinni Preetam, S.V. Rama Rao, Y. Ramana Reddy
1Department of Poultry Science, College of Veterinary Science, P.V. Narasimha RaoTelangana Veterinary University,  Rajendranagar, Hyderabad-500 030, Telangana, India
Cite article:- Srilatha T., Reddy Ravinder V., Preetam Chinni V., Rao Rama S.V., Reddy Ramana Y. (2017). Effect of different levels of dietary crude protein on the growth performance and carcass characteristics of commercial broilers at different phases of growth. Indian Journal of Animal Research. 52(4): 559-563. doi: 10.18805/ijar.B-3255.
An experiment was conducted to find out the effect of different levels of crude protein in broiler diets during different phases. i.e., pre starter (0-11d), starter (12-21d) and finisher (22-42d). 360 day-old broilers (Vencobb) were procured from a commercial hatchery and fed either high or low dietary CP diets during pre-starter (23 and 21%) , starter (21 and 19%) and high, moderate or low CP diets during finisher ( 18.5, 17.5 and 16.5%) phases, for a total of 12 possible treatment combinations at d 42. The results showed that the broilers fed low levels of CP ( 21 and 19 %) had significantly(P<0.05) higher body weight gain (BWG) and feed intake (FI), and better feed efficiency over the diets with high levels of CP during pre-starter and starter phases (23 and 21%, respectively). The higher (18.5%) level of protein in the finisher phase showed higher BWG and best FCR compared to the lower levels (17.5 and 16.5%). Carcass characters were not influenced by the variation in dietary CP level tested except the abdominal fat weight which was significantly higher in broiler fed low CP diet compared to those fed higher levels of CP during all three phases. The results indicated that the broilers fed low CP diets supplemented with critical amino acids (21 and 19%) had beneficial effect on the growth performance during pre-starter and starter phase. The broilers showed an ability to respond to increase in dietary CP levels during finisher phase.
  1. AOAC, (1997). Official Methods of Analysis. 16th edn. Association of Official Analytical Chemists.Washington, DC,USA
  2. Abbasi, M..A,Mahdavi, A.H., Samie, A.H.,Jahanian, R. (2014). Effects of Different Levels of Dietary Crude Protein and Threonine on Performance, Humoral Immune Responses and Intestinal Morphology of Broiler Chicks. Braz. J. Poult. Sci. 16: 35-44.
  3. Aletor, V. A., Hamid, I. I., Niess, E. and Pfeffer, E. (2000). Low protein amino acids supplemented diets in broiler chickens : effects on performance, carcass characteristics whole body composition and efficiencies of nutrient utilization. J. Sci. of Food and Agri. 80: 547-554.
  4. Aletor, V. A., Roth, F. X., Brigitte, R., Paulicks Dora and RothMaier, A. (2001). Growth, body fat deposition, nitrogen excretion and efficiencies of nutrients utilization in broiler chicks fed low protein diets supplemented with amino acids, conjugated linoleic acid or an –glucosidase inhibitor. Arch Geflügelk. 66:21-30.
  5. Baker, D. H. (1996). Advances in amino acid nutrition and metabolism of swine and poultry. In: Nutrient Management of Food Animals to Enhance and Protect the Environment. [Kornegay, E.T.(ed.)], Lewis Publishers, New York.pp. 41-53.
  6. Bartov, I., Bornstein, S and Lipstein, B. (1974). Effect of calorie to protein ratio on the degree of fatness in broilers fed on practical diets. British Poult. Sci.15: 107-117.
  7. Bregendahl, K., Sell, J. L and Zimmerman, D. R. ((2002)). Effect of low-protein diets on growth performance and body composition of broiler chicks. Poult. Sci. 81 : 1156 – 1167.
  8. Ciftci, I and Ceylan, N. (2004). Effects of dietary threonine and crude protein on growth performance, carcass and meat composition of broiler chickens. British Poult. Sci. 45: 280-289.
  9. Corzo, A., Fritts, C. A., Kidd, M. T. and Kerr, B. J. (2005a). Response of broiler chicks to essential and non-essential amino acid supplementation of low crude protein diets. Anim. Feed Sci.and Tech.118: 319-327.
  10. Corzo, A., Kidd, M. T., Dozier, W. A., Walsh. and Peak, S. D. (2005b). Impact of dietary amino acid density on broilers grown for small bird market. J. of Poul. Sci. 42:329-336.
  11. Corzo, A., Sschilling, M. W., Loar, R. E., Meija, L. and Kidd, M. (2010). Responses of Cobb X Cobb 500 broilers to dietary amino acid density regimens. J. Appl. Poul. Res. 19:227-236
  12. Duncan, D. B. (1955). Multiple ‘F’ test. Biometrics 11 : 142.
  13. Fancher, B. I. and Jensen, L. S. (1989a). Influence on performance of three to six week old broilers of varying dietary contents with supplementation of essential amino acid requirements. Poult. Sci.68:113-123.
  14. Farkhoy.M, Mehrdad Modirsanei, Omid Ghavidel,Majid Sadegh, and Sadegh Jafarnejad (2012)..Evaluation of Protein Concentration and Limiting Amino Acids Including Lysine and Met + Cys in Prestarter Diet on Performance of Broilers. Vet. Med. Int.2012- 1-7
  15. Han, Y., Suzuki, H., Parsons, C. M. and Baker, D. H. (1992) . Amino acid fortification of a low protein corn and soybean meal diet for chicks. Poult. Sci. 71:1168-1178.
  16. Jensen, L. S. and Colnago, G. L. (1991). Amino acids and protein for broilers and laying hens. Maryland Nutrition Conference for feed manufactures, 29-36, Maryland, USA.
  17. Jiang, Q., Waldroup, P. W. and Fritts, C. A. (2005). Improving the utilization of diets low in crude protein for broiler chickens. 1. Evaluation of special amino acid supplementation to diets low in crude protein. Int. J. of Poult. Sci. 4:115122.
  18. Kidd, M .T., Kerr, B. J., Firman, J. D. and Boling, S. D. (1996). Growth and carcass characteristics of broilers fed low-protein, threonine-supplemented diets. J. Appl. Poult. Res. 5: 180-190.
  19. Llames, C. R. and Fontaine, J. (1994) Determination of amino acids in feeds: collaborative study. Journal of AOAC Int. 77 (159) : 1362–1402.
  20. Maksoud, A., Yan, F., Cerrate. S., Coto, C., Wang, Z. and Waldroup, P. W. (2011). Effect of Dietary Crude Protein, Lysine Level and Amino Acid Balance on Performance of Broilers 0 to 18 Days of Age. Int. J.of Poult. Sci. 9 (1): 21-27, 2011.
  21. Moran, E. T., Bushong, R. D. and Bilgili, S. F. (1992). Reducing dietary crude protein for broilers while satisfying amino acid requirements by least cost formulation: live performance, litter composition, and yield of fast food carcass cuts of six weeks. Poult. Sci. 71:1687-1694.
  22. Namroud, N. F., Shivazad, M. and Zaghari, M. (2008) Effects of fortifying low crude protein diet with crystalline amino acids on performance, blood ammonia level and excreta characteristics of broiler chicks. Poul.Sci.87: 2250-2258.
  23. Noy, Y. and Sklan, D. ((2002)). Nutrient use in chicks during the first week posthatch. Poul. Sci. 81: 391-399.
  24. Pesti, G. M. and Miller, B. R. (1992). Animal feed formulation: economic and computer applications. Van Nostrand Reinhold, New York, NY.
  25. Si, J., Fritts, C. A., Burnham, D. J. and Waldroup, P. W. (2004) . Extent to which crude protein may be reduced in corn soybean meal broiler diets through amino acid supplementation. Int. J. of Poul. Sci. 3 (1):4650.
  26. Sklan,D. and Plavnik, I. ((2002)). Interactions between dietary crude protein and essential amino acid intake on performance in broilers. Br. Journal of Poul. Sci. 43(3): 442-449.
  27. Sohail, S. S., Bryant, M . M. and Roland, D. A. (2003) . The effect of glycine supplementation on performance of broilers fed sub-    marginal protein with adequate synthetic methionine and lysine. Int. Journal of Poul. Sci.2 (6):394397.
  28. Summers, J. D. and Leeson, S. (1979). Composition of poultry meat as affected by nutritional factors. Poult.Sci. 58: 536-542.
  29. Uzu, G. (1982). Limit of reduction of the protein level in broiler feeds. Poult. Sci. 61 (Abstr.): 1557-1558.
  30. Waldroup, P. W., Mitchell, R. J., Payne ,J. R. and Hazen, K. R. (1976). Performance of chicks fed diets formulated to minimize excess levels of essential amino acids. Poult. Sci. 55: 243-253
  31. Waldroup, P. W., Jiang, Q. and Fritts, C. A. (2005a.) Effects of supplementing broiler diets low in crude protein with essential and nonessential amino acids. Int. J.of Poult.Sci.4(6): 425-431.
  32. Waldroup, P.W., Jiang, Q. and Fritts, C. A. (2005b). Effects of glycine and threonine supplementation on performance of broiler chicks fed diets low in crude protein. Int. J. of Poult. Sci.4(5): 250-257.
  33. Yamazaki, M., Murakami, H., Nakashima, K., Abe, H. and Takemasa, M. (2006). Effects of excess amino acids in low protein diet on abdominal fat deposition and nitrogen excretion of the broiler chicks. J. of Poult. Sci. 43:150-155

Editorial Board

View all (0)