Effect of dietary threonine level on productivity and carcass characteristics of indigenous Venda chickens

DOI: 10.18805/ijar.v0iOF.9150    | Article Id: B-711 | Page : 634-639
Citation :- Effect of dietary threonine level on productivity and carcass characteristics of indigenous Venda chickens.Indian Journal Of Animal Research.2019.(53):634-639
Jones Wilfred Ng’ambi, Ndivhuho Ramuthaga and David Brown* db4010396@gmail.com
Address : Department of Agricultural Economics and Animal Production, University of Limpopo, P/Bag X1106, Sovenga 0727, South Africa
Submitted Date : 10-02-2017
Accepted Date : 17-07-2017

Abstract

Two experiments were conducted to determine the effect of dietary threonine level on productivity and carcass characteristics of indigenous Venda chickens. In each experiment the diets were isocaloric and isonitrogenous but with different dietary threonine levels. A complete randomized design was used in both experiments, the grower (1-49 days old unsexed Venda chickens) and finisher (50-91 days old female chickens) phases. The grower diets contained 4 (CT4), 5 (CT5), 6 (CT6), 7 (CT7) and 8 (CT8) g of threonine/kg DM, while similar diets were used for the finisher phase but designated (FT4), (FT5), (FT6), (FT7) and (FT8), respectively. A quadratic equation was used to determine threonine levels for optimal productivity. Dietary threonine level had significant effect (P<0.05) on feed intake, growth rate, FCR, live weight, ME intake and N-retention of unsexed and female Venda chickens.  Feed intake, growth rate, feed conversion ratio, live weight, metabolisable energy and N-retention of unsexed and female Venda chickens were optimized at different dietary threonine levels. Dietary threonine level had no effect (P>0.05) on pH of crop, proventriculus, gizzard, small intestine, large intestine and caecum contents of female Venda chickens. Dietary threonine requirements for optimal productivity decreased as Venda chickens grew older. Dietary threonine levels for optimal productivity will depend on the particular variable in question. These findings have a lot of implications on ration formulation for slow-growing Venda chickens. 

Keywords

Breast meat Growth Meat threonine content Slow-growing Venda chickens Threonine level.

References

  1. American Meat Science Association, (1995). Research Guidelines for Cookery, Sensory Evaluation and Instrumental Measurements of Fresh Meat. American Meat Science Association, Chicago, IL., USA, ISBN-13: 978-0887000188, Page 47.
  2. AOAC., (2008). Association of Official Analytical Chemists, Official Methods of Analysis, 17th edition, AOAC, Washington, D.C.
  3. Çiftci, I. and Ceylan, N. (2004). Effects of dietary and crude protein on growth performance, carcase and meat composition of broiler chickens. Bri. Poult. Sci. 45: 280–289.
  4. Dozier, W.A., Moran, E.T. and Kidd, M.T. (2001). Comparisons of male and female broiler responses to dietary threonine from 42-56 days of age. J. Appl. Poult. Res. 10: 53-59.
  5. Han, Y. and Baker, D.H. (1991). Lysine requirements of fast- and slow-growing broiler chicks. Poult. Sci. 73: 1738-1745.
  6. Kidd, M.T., Corzo, A., Hoehler, D., Kerr, B.J., Barber, S.J. and Branton, S.L. (2004). Threonine needs of broiler chickens with different growth rates. Poult. Sci. 83: 1368-1375.
  7. Kidd, M.T. and Kerr, B.J. (1997). Threonine responses in commercial broilers at 30 to 42 days. J. Appl. Poult. Res. 6: 362–367.
  8. Kidd, M.T., Kerr, B.J. and Anthony, N.B. (1997). Dietary interactions between lysine and threonine in broilers. Poult. Sci 7: 608-614.
  9. Kidd, M. T. and Kerr, B. J. (1996). L-Threonine for poultry: A review. J. App. Poult. Res. 5: 358–367.
  10. Kobayashi, M., Li, L., Iwamoto, N., Nakajima-Takagi, Y., Kaneko, H., Nakayama, Y., et al (2009). The antioxidant defence system keap1-Nrf2 comprises a multiple sensing mechanism for responding to a wide range of chemical compounds. Mol. Cel. Biol. 29(2): 493-502.
  11. Lawrie, R.A. (2006). Meat Science. 7th edition. Woodhead Publishing Limited, Cambridge, England.
  12. McDonald, P., Edwards, R.A., Greenhalgh, J. F.D., Morgan, C. A., et al .(2011). Animal Nutrition. 7th edition, United Kingdom, Prentice Hall publishers, pp 656.
  13. Moran, E.T and Bilgili, S.F. (1990). Processing losses carcass quality and meat yield of poultry chickens as influenced by dietary lysine. Poult. Sci. 69: 702-709.
  14. NRC. (1994). Nutrient Requirements of Poultry. 9th Revised Edition. National Academic Press, Washington, DC. Ojano-Dirain, C.P. and Waldroup, P.W. (2002). Evaluation of lysine, methionine and threonine needs of broilers three to six week of age under moderate temperature stress. J. Poult. Sci. 1: 16-21.
  15. Rezaeipour, V., Fonani, H. and Irani, M. (2012). Effects of dietary L-threonine and Saccharomyces cerevisiae on performance, intestinal morphology and immune response of broiler chickens. S. Afr. J. Anim. Sci. 42: 267-272.
  16. SAS. (2008). Statistical Analysis System. SAS user Guide: Release 9.2. SAS institute Inc, Cary NC, USA.
  17. Webel, D.M., Fernandez, S.R., Parsons, C.M. and Baker, D.H. (1996). Digestible threonine requirements of broiler chickens during the period three to six and 6 to 8 weeks post-hatching. Poult. Sci. 75: 1253-1257. 

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