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Poultry Science
Rozenboim, I., Hebrew University of Jerusalem, Department of Animal Science, Rehovot 76100, Israel
Biran, I., Hebrew University of Jerusalem, Department of Animal Science, Rehovot 76100, Israel
Chaiseha, Y., School of Biology, Suranaree University of Technology, Thailand
Yahav, S., Institute of Animal Science, ARO the Volcani Center, Animal Science, Bet Dagan 50250, Israel
Rosenstrauch, A., Achva Academic College, Shikmim 79800, Israel
Sklan, D., Hebrew University of Jerusalem, Department of Animal Science, Rehovot 76100, Israel
Halevy, O., Hebrew University of Jerusalem, Department of Animal Science, Rehovot 76100, Israel
Previous reports have suggested that green light enhances broiler growth at an early age, whereas blue light enhances growth at older ages. The aim of this study was to examine the effect of a switch in monochromatic light at 2 ages on growth and development of broilers. Male chicks (Anak, n = 640) were used. After hatch, chicks were weighed, wing-banded, and blocked into treatment groups. Chicks were grown in 1-m2 pens in 8 isolated light-proof rooms (20 birds/pen). The light treatments were (1) Control white (mini-incandescent lamps), 2) blue light-emitting diode (LED) lamps, 3) green LED lamps, 4) blue LED switching to green at 10 d of age, 5) blue LED switching to green at 20 d of age, 6) green LED switching to blue at 10 d of age, and 7) green LED switching to blue at 20 d of age. There were 8 pens for treatment 1, and 4 pens for each of the other treatments. The light schedule was 23L:1D, and intensity was 0.1 watts/m2. BW and feed consumption were recorded. Green light birds were significantly heavier at 4 d of age. Switching light at 10 d of age from green to blue caused a further increase in BW. This improved growth was maintained until the end of the experiment. Light switching from blue to green at 20 d of age also improved growth as compared with white light. Average feed efficiency and mortality rate did not differ between groups. No association was observed among light treatment, performance, and plasma triiodothyronine concentration. We suggest that green light stimulated growth of birds at early age, and shifting birds to a different light environment at 10 or 20 d of age might further stimulate growth.
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The effect of a green and blue monochromatic light combination on broiler growth and development
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Rozenboim, I., Hebrew University of Jerusalem, Department of Animal Science, Rehovot 76100, Israel
Biran, I., Hebrew University of Jerusalem, Department of Animal Science, Rehovot 76100, Israel
Chaiseha, Y., School of Biology, Suranaree University of Technology, Thailand
Yahav, S., Institute of Animal Science, ARO the Volcani Center, Animal Science, Bet Dagan 50250, Israel
Rosenstrauch, A., Achva Academic College, Shikmim 79800, Israel
Sklan, D., Hebrew University of Jerusalem, Department of Animal Science, Rehovot 76100, Israel
Halevy, O., Hebrew University of Jerusalem, Department of Animal Science, Rehovot 76100, Israel
The effect of a green and blue monochromatic light combination on broiler growth and development
Previous reports have suggested that green light enhances broiler growth at an early age, whereas blue light enhances growth at older ages. The aim of this study was to examine the effect of a switch in monochromatic light at 2 ages on growth and development of broilers. Male chicks (Anak, n = 640) were used. After hatch, chicks were weighed, wing-banded, and blocked into treatment groups. Chicks were grown in 1-m2 pens in 8 isolated light-proof rooms (20 birds/pen). The light treatments were (1) Control white (mini-incandescent lamps), 2) blue light-emitting diode (LED) lamps, 3) green LED lamps, 4) blue LED switching to green at 10 d of age, 5) blue LED switching to green at 20 d of age, 6) green LED switching to blue at 10 d of age, and 7) green LED switching to blue at 20 d of age. There were 8 pens for treatment 1, and 4 pens for each of the other treatments. The light schedule was 23L:1D, and intensity was 0.1 watts/m2. BW and feed consumption were recorded. Green light birds were significantly heavier at 4 d of age. Switching light at 10 d of age from green to blue caused a further increase in BW. This improved growth was maintained until the end of the experiment. Light switching from blue to green at 20 d of age also improved growth as compared with white light. Average feed efficiency and mortality rate did not differ between groups. No association was observed among light treatment, performance, and plasma triiodothyronine concentration. We suggest that green light stimulated growth of birds at early age, and shifting birds to a different light environment at 10 or 20 d of age might further stimulate growth.
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