Subscribe Now Subscribe Today
Research Article

Effect of Varying Light Intensity on Blood Physiological Reactions of Broiler Chickens Grown to Heavy Weights

H.A. Olanrewaju, J.L. Purswell, S.D. Collier and S.L. Branton
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

This study investigated effects of varying levels of light intensities (25, 10, 5, 2.5 and 0.2 lx) from 22 to 56 d of age at 50% RH on blood acid-base balance, metabolites and electrolytes of heavy broilers reared under environmentally controlled conditions. Four identical trials were conducted with two replications per trial. In each trial, 600 1-d-old Ross 308 chicks were randomly distributed into 10 environmentally controlled chambers (30 males and 30 females chicks/chamber). Each chamber was randomly assigned one of five light intensities from d 22 to 56 d of age. Birds were provided a four phase-feeding program (starter: 1 to 14 d, grower: 15 to 28 d, finisher: 29 to 42 d and withdrawal: 43 to 56 d). Feed and water were provided ad libitum. Venous blood samples were collected on d 21 (base line), 28, 42 and 56. The lowest light intensity of 0.2 lx significantly (p<0.05) increased pH, Na+, K+, Cl- and reduced pCO2, Hb and Hct. However, all these acid-base changes are still within the normal acid-base homeostasis physiological ranges. In addition, exposure of modern heavy broilers to varying light intensity produced no significant effect on pO2, sO2, Ca2+, mOsm, McHc, Angap, T3, T4 and CS. Acid-base regulation during light intensity exposure did not deteriorate despite a lower pCO2 which consequently increased blood pH that resulted in a compensatory mechanism for mild alkalosis. This study shows the positive impact on profits to commercial poultry facilities that are using low lighting environment to reduce hyperactivity, pecking damage and energy costs without the induction of physiological stress effects on broiler welfare.

Related Articles in ASCI
Similar Articles in this Journal
Search in Google Scholar
View Citation
Report Citation

  How to cite this article:

H.A. Olanrewaju, J.L. Purswell, S.D. Collier and S.L. Branton, 2012. Effect of Varying Light Intensity on Blood Physiological Reactions of Broiler Chickens Grown to Heavy Weights. International Journal of Poultry Science, 11: 81-87.

DOI: 10.3923/ijps.2012.81.87


1:  Borges, S.A., A.V.F. da Silva and A. Maiorka, 2007. Acid-base balance in broilers. World's Poult. Sci. J., 63: 73-81.
CrossRef  |  Direct Link  |  

2:  Brobst, D., 1975. Evaluation of clinical disorders of acid-base balance. J. Am. Vet. Med. Assoc., 166: 359-364.
PubMed  |  

3:  Burnett, R.W. and D.C. Noonan, 1974. Calculations and correction factors used in determination of blood pH and blood gases. Clin. Chem., 20: 1499-1506.

4:  Buyse, J., P.C.M. Simons, F.M.G. Boshouwers and E. Decuypere, 1996. Effect of intermittent lighting, light intensity and source of the performance and welfare of broilers. World's Poult. Sci. J., 52: 121-130.
Direct Link  |  

5:  Classen, H.L. and C. Riddell, 1989. Photoperiodic effects on performance and leg abnormalities in broiler chickens. Poult. Sci., 68: 873-879.
PubMed  |  

6:  Davenport, H., 1950. The ABC of Acid-Base Chemistry: The Elements of Physiological Blood-gas Chemistry for Medical Students and Physicians. University Chicago Press, Chicago.

7:  Dozier, W.A.3rd., C.K. Gehring, A. Corzo and H.A. Olanrewaju, 2011. Apparent metabolizable energy needs of male and female broilers from 36 to 47 days of age. Poult. Sci., 90: 804-814.
CrossRef  |  PubMed  |  Direct Link  |  

8:  Gesell, R., 1925. The chemical regulation of respiration. Physiol. Rev., 5: 551-595.

9:  Gunnerson, K.J., 2005. Clinical review: The meaning of acid-base abnormalities in the intensive care unit part I-epidemiology. Crit. Care, 9: 508-516.
PubMed  |  

10:  Korte, M., A. Sgoifo, W. Ruesink, C. Kwakernaak, S. van Voorst, C.W. Scheele and H.J. Blokhuis, 1999. High carbon dioxide tension (PCO2) and the incidence of cardiac arrhythmias in rapidly growing broiler chickens. Vet. Rec., 145: 40-43.
CrossRef  |  Direct Link  |  

11:  Long, S., 1982. Acid-base balance and urinary acidification in birds. Comp. Biochem. Physiol. Part A: Physiol., 71: 519-526.
CrossRef  |  PubMed  |  Direct Link  |  

12:  Manser, C.E., 1996. Effects of lighting on the welfare of domestic poultry: A review. Anim. Welfare, 5: 341-360.

13:  NRC., 1994. Nutrient Requirements of Poultry. 9th Rev. Edn., National Academy Press, Washington, DC., USA., ISBN-13: 978-0309048927, Pages: 176.

14:  NRC, 1996. Guide for the Care and Use of Laboratory Animals. National Academy Press, Washington, DC., USA., ISBN-10: 0309053773, pp: 1-5.

15:  Olanrewaju, H.A., S. Wongpichet, J.P. Thaxton, W.A. Dozier III and S.L. Branton, 2006. Stress and acid-base balance in chickens. Poult. Sci., 85: 1266-1274.
CrossRef  |  Direct Link  |  

16:  Olanrewaju, H.A., J.P. Thaxton, W.A. Dozier III, J. Purswell, W.B. Roush and S.L. Branton, 2006. A review of lighting programs for broiler production. Int. J. Poult. Sci., 5: 301-308.
CrossRef  |  Direct Link  |  

17:  Olanrewaju, H.A., J.P. Thaxton, W.A. Dozier III, J. Purswell, S.D. Collier and S.L. Branton, 2008. Interactive effects of ammonia and light intensity on hematochemical variables in chickens. Poult. Sci., 87: 1407-1414.

18:  Olanrewaju, H.A., J.L. Purswell, S.D. Collier and S.L. Branton, 2010. Effect of ambient temperature and light intensity on growth performance and carcass characteristics of heavy broiler chickens at 56 days of age. Int. J. Poult. Sci., 9: 720-725.
CrossRef  |  Direct Link  |  

19:  Puvadolpirod, S. and J.P. Thaxton, 2000. Model of physiological stress in chickens 4. Digestion and metabolism. Poult. Sci., 79: 383-390.
CrossRef  |  Direct Link  |  

20:  SAS., 2008. SAS Proprietary Software, Release 9.2. SAS Institute Inc., Cary, NC., USA.

21:  Toyomizu, M., M. Tokuda, M. Mujahid and Y. Akiba, 2005. Progressive alteration to core temperature, respiration and blood acid-base balance in broiler chickens exposed to acute heat stress. J. Poult. Sci., 42: 110-118.
CrossRef  |  Direct Link  |  

22:  Yahav, S., S. Goldfeld, I. Plavnik and S. Hurwitz, 1995. Physiological responses of chickens and turkeys to relative humidity during exposure to high ambient temperature. J. Thermal Biol., 20: 245-253.
CrossRef  |  Direct Link  |  

23:  Yahav, S., I. Plavnik, M. Rusal and S. Hurwitz, 1998. Response of turkeys to relative humidity at high ambient temperature. Br. Poult. Sci., 39: 340-345.
CrossRef  |  PubMed  |  

©  2021 Science Alert. All Rights Reserved