scholarly journals PRODUCTIVE AND PHYSIOLOGICAL RESPONSE OF BROILER CHICKENS EXPOSED TO DIFFERENT COLORED LIGHT-EMITTING DIODE AND REARED UNDER DIFFERENT STOCKING DENSITIES

2019 ◽  
Vol 38 (4) ◽  
pp. 1243-1264 ◽  
Author(s):  
abdelazeem abdelazeem
Keyword(s):  
Physiological Response ◽  
Broiler Chickens ◽  
Light Emitting Diode ◽  
Light Emitting

scholarly journals Behavior of broilers subjected to different light spectra and illuminances

2020 ◽  
Vol 24 (6) ◽  
pp. 415-421
Author(s):  
Aline C. Lucena ◽  
Héliton Pandorfi ◽  
Gledson L. P. Almeida ◽  
Cristiane Guiselini ◽  
José E. M. Araújo ◽  
...  
Keyword(s):  
Broiler Chickens ◽  
Light Emitting Diode ◽  
Chi Square ◽  
Light Emitting ◽  
Light Spectra ◽  
White Band ◽  
Behavioral Variables ◽  
Chi Square Test ◽  
Mixed Batch ◽  
The Ideal

ABSTRACT The ideal illuminance in poultry houses for broiler chickens may lead to improvement in housing efficiency and broiler welfare. In this context, the objective of this research was to evaluate the behavior and welfare of broiler chickens under effect of illuminance by light-emitting diode (LED) in white band (400-760 nm) and blue/green band (470-525 nm). The experiment was conducted from October to December 2017, in the municipality of Carpina, PE, Brazil, and had 384-oneday-old chicks (mixed batch), Cobb 500 strain. The adopted design was completely randomized, in a 4 x 2 factorial scheme, corresponding to four illuminances, 5 lx (I1), 20 lx (I2), 150 lx (I3) and 5-20 lx (5 lx in the 1st, 2nd and 6th weeks and 20 lx in the 3rd, 4th and 5th weeks - I4), and two light spectra using LED bars, RGB type, in white (400-760 nm) color (C1) and blue/green (470-525 nm) dichromatic color (C2), with three repetitions. A continuous lighting program was used, 18 h of light and 6 h of dark per day. Ingestive, posture, comfort and natural behaviors, aggressiveness and discomfort of the broiler were evaluated. Broiler behavioral variables were determined by the frequency of the events and their probability of occurrence by the Chi-square test. Broilers subjected to wavelengths in the blue/green range and illuminance of 20 lx and 5-20 lx showed more significant ingestive and comfort behaviors, which demonstrates better welfare under these housing conditions.

Effect of various monochromatic light-emitting diode colours on the behaviour and welfare of broiler chickens

2020 ◽  
Vol 100 (4) ◽  
pp. 615-623
Author(s):  
Shabiha Sultana ◽  
Md. Rakibul Hassan ◽  
Byung Soo Kim ◽  
Kyeong Seon Ryu
Keyword(s):  
Broiler Chickens ◽  
Light Emitting Diode ◽  
Monochromatic Light ◽  
Growth Period ◽  
Broiler Chicks ◽  
Light Emitting ◽  
Gait Score ◽  
Set Up ◽  
Effect Of Light ◽  
Sitting Behaviour

This study was conducted to evaluate the effect of different monochromatic light-emitting diode colours on the behaviour and welfare of broiler chicks. A total of 750 one-day-old chicks were used and lighting was set up as follows: pure blue (PB, 440–450 nm), bright blue (460–470 nm), sky blue (480–490 nm), greenish blue (500–510 nm), and green (530–540), while fluorescent white (400–700 nm) was used as a control. Birds were placed into 30 independent light proof pens and each light treatment was replicated five times with 25 birds in each pen. Video was recorded and behaviour was evaluated twice per day and observed five consecutive days in a week. Broiler welfare was evaluated using the characteristics of gait score, tibia dyschondroplasia, tonic immobility duration, and heterophil:lymphocyte ratio. In results, sitting, walking, and ground pecking behaviour were influenced by the light colour from 0 to 7 d. Extending the rearing period from 8 to 21 d resulted in increased sitting behaviour and decreased walking and pecking behaviour in chicks in the PB treatment (P < 0.05). When the growth period was extended further (22–42 d), sitting behaviour increased when chicks were exposed to PB light (P < 0.05). The effect of light colour did not significantly influence welfare of broiler chicks. Thus, the present results suggest that PB light colour decreased broiler chickens movement and thus increased duration of sitting behaviour. These results would be helpful to choose light colour for broiler producers.

scholarly journals Light emitting diode (LED) use in artificial lighting for broiler chicken production

2014 ◽  
Vol 34 (3) ◽  
pp. 422-427 ◽  
Author(s):  
Mayara R. de Santana ◽  
Rodrigo G. Garcia ◽  
Irenilza de A. Naas ◽  
Ibiara C. de L. A. Paz ◽  
Fabiana R. Caldara ◽  
...  
Keyword(s):  
Weight Gain ◽  
Feed Intake ◽  
Broiler Chickens ◽  
Energy Savings ◽  
Light Emitting Diode ◽  
Carcass Weight ◽  
Feed Conversion ◽  
Carcass Yield ◽  
Light Emitting ◽  
Artificial Lighting

Light emitting diode (LED) has been used in commercial poultry industry by presenting superior energy savings and providing feasibility on production process. The objective of this research was to evaluate performance and carcass yield of broiler chickens exposed to different LED colors compared with fluorescent lamps. For that, two experiments (E1 and E2) were performed and 2,646 Cobb® chickens were used. In experiment E1, male birds were exposed to 20 lux artificial lighting with red, yellow, blue, and white LED bulbs; and fluorescent bulb. In experiment E2, male and female birds were exposed to 15 lux artificial lighting with red and blue LED bulbs; and fluorescent bulb. Cumulative weight gain (kg), feed intake (kg), feed conversion, hot carcass weight (kg), carcass yield (%), and breast and thigh + drumstick yield (%) were used as response variables. Results showed no difference (p > 0.05) among treatments for performance, carcass yield, and cut yield in experiment E1. In experiment E2 there was only difference between genders (p < 0.05) and males showed higher total weight gain, feed intake, hot carcass weight and thigh + drumstick yield. Different LED color use had same effect as fluorescent lights on broiler performance and carcass yield.

Synchronization of Chaotic Quantum Dot Light Emitting Diodes under Optical Feedback Effect

2020 ◽  
pp. 144-148
Keyword(s):  
Quantum Dot ◽  
Delay Time ◽  
Chaos Synchronization ◽  
Optical Feedback ◽  
Light Emitting Diode ◽  
Feedback Effect ◽  
Complete Synchronization ◽  
Light Emitting ◽  
Coupling Methods ◽  
Coupling Parameters

Chaos synchronization of delayed quantum dot light emitting diode has been studied theortetically which are coupled via the unidirectional and bidirectional. at synchronization of chaotic, The dynamics is identical with delayed optical feedback for those coupling methods. Depending on the coupling parameters and delay time the system exhibits complete synchronization, . Under proper conditions, the receiver quantum dot light emitting diode can be satisfactorily synchronized with the transmitter quantum dot light emitting diode due to the optical feedback effect.

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