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Optimization of the Light Environmen...

Aldridge, Douglas J.

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Optimization of the Light Environment for Broiler Chickens.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Optimization of the Light Environment for Broiler Chickens./
作者:	Aldridge, Douglas J.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	111 p.
附註:	Source: Dissertations Abstracts International, Volume: 80-12, Section: B.
Contained By:	Dissertations Abstracts International80-12B.
標題:	Agriculture. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13880453
ISBN:	9781392224106

Optimization of the Light Environment for Broiler Chickens.
Aldridge, Douglas J.

Optimization of the Light Environment for Broiler Chickens. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 111 p.

Source: Dissertations Abstracts International, Volume: 80-12, Section: B.

Thesis (Ph.D.)--University of Arkansas, 2019.

This item must not be sold to any third party vendors.

The use of artificial light sources has been necessitated by the use of fully enclosed rearing facilities for improved environmental control. Light Emitting Diodes (LED) have been developed as a light source that reduce the utilities required to provide equal light to that of incandescent sources. The following reports were carried out to investigate the effects of two light color temperatures, light intensity and light intensity gradients on broiler chicken production and behavior. The first investigation consisting of two consecutive trials investigated the effect of two light color temperatures (2700 K and 5000 K) in addition to the preference for each. It was found that broilers provided a choice between 2700 K and 5000 K had greater (p<0.05) BW than those reared using only 2700 K while those under 5000 K were intermediate. Further, broilers displayed a preference for 2700 K during the first and last hour of the light period and no preference during the other monitored hours. In the second report light intensity was investigated using 5, 10 or 20 lux (lx) in addition to access to all three intensities. It was found that birds reared using 5 lx and those given access to all three intensities had lower (p<0.05) feed:gain compared to those reared under 20 lx with 10 being intermediate. Further no difference (p>0.05) was found between BW or BW CV for each of the treatments. In the final report the use of feed line lighting was compared to conventional overhead lighting. The effect of the gradient (90 lx to 30 lx) resulted in similar production to that of a conventional uniform lighting environment of 20 lx. The use of preference and choice in light environments has been suggested to improve the production and wellbeing of broiler chickens in all three of the reports using light color temperature, light intensity, and light intensity gradients.

ISBN: 9781392224106Subjects--Topical Terms:

518588
Agriculture.

Optimization of the Light Environment for Broiler Chickens.
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520 $a The use of artificial light sources has been necessitated by the use of fully enclosed rearing facilities for improved environmental control. Light Emitting Diodes (LED) have been developed as a light source that reduce the utilities required to provide equal light to that of incandescent sources. The following reports were carried out to investigate the effects of two light color temperatures, light intensity and light intensity gradients on broiler chicken production and behavior. The first investigation consisting of two consecutive trials investigated the effect of two light color temperatures (2700 K and 5000 K) in addition to the preference for each. It was found that broilers provided a choice between 2700 K and 5000 K had greater (p<0.05) BW than those reared using only 2700 K while those under 5000 K were intermediate. Further, broilers displayed a preference for 2700 K during the first and last hour of the light period and no preference during the other monitored hours. In the second report light intensity was investigated using 5, 10 or 20 lux (lx) in addition to access to all three intensities. It was found that birds reared using 5 lx and those given access to all three intensities had lower (p<0.05) feed:gain compared to those reared under 20 lx with 10 being intermediate. Further no difference (p>0.05) was found between BW or BW CV for each of the treatments. In the final report the use of feed line lighting was compared to conventional overhead lighting. The effect of the gradient (90 lx to 30 lx) resulted in similar production to that of a conventional uniform lighting environment of 20 lx. The use of preference and choice in light environments has been suggested to improve the production and wellbeing of broiler chickens in all three of the reports using light color temperature, light intensity, and light intensity gradients.
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