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Analysis of Arabidopsis thaliana Growth Behavior in Different Light Qualities
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Live performance and yields of broilers provided various lighting schedules.

J A Renden1, S F Bilgili, R J Lien

  • 1Department of Poultry Science, Alabama Agricultural Experiment Station.

Poultry Science
|October 1, 1991
PubMed
Summary

Broiler performance and carcass yield were measured under different light schedules. Brief intermittent lighting (BI) reduced leg abnormalities and improved tibial dyschondroplasia recovery in broilers.

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Area of Science:

  • Poultry Science
  • Animal Nutrition and Physiology
  • Avian Health

Background:

  • Leg disorders are a significant concern in broiler production, impacting animal welfare and economic returns.
  • Photoperiods and light intensity are known environmental factors that can influence broiler growth and health.
  • Understanding the relationship between lighting programs and leg health is crucial for optimizing broiler management.

Purpose of the Study:

  • To evaluate the impact of different lighting schedules on broiler performance, carcass yield, and the incidence of leg disorders.
  • To investigate the effects of specific photoschedules on body weight, leg abnormality frequency, and tibial dyschondroplasia (TD) in broilers.

Main Methods:

  • Day-old male broilers were housed in light-controlled chambers under four distinct photoschedules: extended (E), intermittent (I), brief-intermittent (BI), and brief-extended (BE).
  • Light intensity was maintained consistently across all treatments (5.4 +/- 0.26 lx).
  • Broiler performance (body weight), carcass yield (breast, tenders), and leg health (abnormalities, TD) were assessed at various ages (13, 21, 42, and 56 days).

Main Results:

  • Broilers under BI and BE treatments exhibited lower body weight compared to the extended (E) treatment at 13, 21, and 42 days of age.
  • The incidence of leg abnormalities increased with age, but birds on the BI schedule showed significantly fewer leg abnormalities than those on the E schedule.
  • The BI schedule demonstrated improved recovery from tibial dyschondroplasia (TD) at 56 days compared to other lighting treatments. Carcass yield analysis revealed variations in breast and tender yields among treatments.

Conclusions:

  • Specific lighting programs, particularly the brief intermittent (BI) schedule, can effectively reduce the incidence of leg disorders and improve tibial dyschondroplasia recovery in broilers.
  • Photoperiod management presents a viable strategy for mitigating leg health issues in broiler chickens, potentially enhancing animal welfare and production efficiency.
  • Further research into optimal lighting strategies can contribute to more sustainable and profitable broiler farming practices.