- Volume 31 Issue 1
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Effects of four dim vs high intensity red color light regimens on growth performance and welfare of broilers
- Senaratna, D. (Department of Animal Science, Faculty of Agriculture, University of Ruhuna) ;
- Samarakone, T.S. (Department of Animal Science, Faculty of Agriculture, University of Peradeniya) ;
- Gunawardena, W.W.D.A. (Department of Animal Science, Faculty of Agriculture, University of Ruhuna)
- Received : 2016.02.18
- Accepted : 2016.05.16
- Published : 2018.01.01
Objective: Broilers show clear preference towards red color light (RL). However setting of an optimum light intensity is difficult since dim intensities that favor growth reduce welfare. This experiment was conducted to test the most effective RL intensity regimen (Dim [5 lux; DI] vs high [320 lux; HI]) in combination applied at different growth stages that favors for both performance and welfare. Methods: Complete randomize design was adopted with 6 replicates. Treatments were; T1 = early DI (8-21 d)+latter HI (22-35 d); T2 = early DI (8-28 d)+latter HI (29-35 d), T3 = early HI (8-21 d)+latter DI (22-35 d), T4 = early HI (8-28 d)+latter DI (29-35 d) and T5 = control (white light; WT) (8-35 d) at medium intensity (20 lux). Body weight (BW), weight gain (WG), water/feed intake and ratio, feed conversion ratios (FCR) were assessed. Common behaviours (15) were recorded by scan sampling method. Lameness, foot pad dermatitis, breast blisters, hock burning damage were assessed as welfare parameters. Fear reactions were tested using Tonic Immobility Test. Ocular and carcass evaluations were done. Meat and tibiae were analyzed for fat and bone ash respectively. Results: On 35 d, the highest BW (
Supported by : University Grants Commission
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