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Minimum light intensity threshold to prevent negative effects on broiler production and welfare
A Deep1, C Raginski, K Schwean-Lardner
1a Department of Animal and Poultry Science , University of Saskatchewan , Saskatoon , Canada.
British Poultry Science
|November 16, 2013
Summary
Minimum light intensity for broiler production should be 5 lux. Higher light intensity improved broiler growth, feed intake, and breast meat yield, while reducing mortality and foot pad lesions.
Area of Science:
- Animal Science
- Poultry Science
- Animal Welfare
Background:
- Establishing optimal lighting conditions is crucial for broiler production and welfare.
- Research is needed to define minimum light intensity standards for intensively housed broilers.
Purpose of the Study:
- To investigate the effects of varying light intensities (0.1 to 10 lux) on broiler performance and welfare.
- To compare the responses of two broiler genotypes (Ross × Ross 308 and 708) to different light intensities.
Main Methods:
- Three experiments were conducted over 35 days using 18,720 broilers across different light intensities.
- A randomized complete block design was employed, with light intensity as the main treatment.
- Broiler performance, carcass characteristics, and welfare indicators were measured.
Main Results:
- Increasing light intensity from 0.5 to 10 lux linearly improved body weight gain and feed intake.
- A light intensity of 5 lux maximized the mortality-corrected gain-to-feed ratio.
- Higher light intensities increased carcass and breast meat yield but decreased drum bone and wing yield.
Conclusions:
- Light intensity significantly impacts broiler performance, with 5 lux identified as a beneficial minimum.
- Increased light intensity positively affected broiler welfare by reducing foot pad lesions and ocular dimensions.
- While performance and yield improved with light intensity, mortality and gait scores were not significantly affected.
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