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Effect of light intensity on growth performance and bone development of tibia in broilers
Yujun Wu1, Xiumin Zhou1, Mengmeng Wang1
1State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.
Journal of Animal Physiology and Animal Nutrition
|January 21, 2022
Summary
Lower light intensity (2-5 Lux) in broiler chickens significantly improves body weight and feed conversion ratio. This management strategy enhances broiler growth and bone development, particularly during the starter phase.
Area of Science:
- Animal Science
- Poultry Husbandry
- Avian Physiology
Background:
- Light management is crucial for broiler health and growth.
- The specific impact of varying light intensities on broiler growth and tibia development requires further clarification.
Purpose of the Study:
- To investigate the effects of different light intensities on broiler growth performance.
- To assess the association between light intensity and tibia development in broilers.
Main Methods:
- 462 Ross male broilers were allocated into seven groups exposed to light intensities ranging from 0.5 to 19 Lux for 42 days.
- Growth performance, tibia characteristics (length, width, weight, strength, mineral density, ash, phosphorus), plasma mineral levels, and growth plate chondrocytes were analyzed.
Main Results:
- Lower light intensities (2, 5 Lux) resulted in higher body weight and improved feed conversion ratio.
- Reduced light intensity increased tibia ash and phosphorus content during the starter phase and elevated plasma calcium, phosphorus, and alkaline phosphatase.
- Lower light intensity decreased hypertrophic chondrocytes in the starter phase growth plate, without affecting other zones or finishing phase development.
Conclusions:
- Lower light intensity positively influences broiler growth performance and bone development, especially during the initial growth stage.
- Implementing lower light intensity during the starter phase is a potential management strategy for the broiler industry.
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