Intermittent Light and Light Intensity Effects on Broilers in Light-Proof Pens ,

Dorminey, R. W.; Nakaue, H. S.

doi:10.3382/ps.0561868

Cited by 17 publications

(9 citation statements)

References 21 publications

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“…1 to 100 lx was consistent with the findings of Barott and Pringle (1951), Skoglund and Palmer (1962), Weaver and Siegel (1968), and Dorminey and Nakaue (1977). Cherry and Barwick (1962) observed different effects of light intensity on body weight depending on sex of the birds and their rearing conditions.…”

Section: Discussionsupporting

confidence: 92%

“…Cherry and Barwick (1962) observed different effects of light intensity on body weight depending on sex of the birds and their rearing conditions. It would appear from the present study and those of others (Cherry and Barwick, 1962;Weaver and Siegel, 1968;Dorminey and Nakaue, 1977) that feed conversion is unaffected by light intensities ranging from .5 to 30 lx, but may, however, be slightly improved under lower intensities when comparisons are made between intensities ranging from .1 to 100 lx.…”

Section: Discussioncontrasting

confidence: 51%

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Light Intensity Effects on Performance, Activity, Leg Disorders, and Sudden Death Syndrome of Roaster Chickens

1986

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The effects of light intensity on performance, activity, leg disorders and sudden death syndrome (SDS) of male chickens were examined in two experiments. In each experiment 5,600 1-day-old chicks were divided evenly between 8 light-proof floor pens and reared to 9 weeks of age on one of four light intensity treatments: .5, 10, 20, and 30 1x in Experiment 1 and .1, 1, 10, and 100 1x in Experiment 2. Light intensities less than 10 1x were phased in gradually by 3 weeks of age. Light intensity had no effect on 3, 6, or 9-week body weight, incidence of leg disorders, total mortality, or mortality due to SDS in either experiment (P greater than .05). Effects of light intensity on feed conversion and carcass quality were inconsistent across the two experiments. In both experiments chicken activity, as measured by the proportion of birds standing up of those present in a 2.25-m2 floor grid in each pen, decreased with age (P less than .01) and was influenced by a light intensity by age interaction (P less than .05). It was concluded that bright lighting (greater than or equal to 10 1x) was not effective in reducing the incidence of leg disorders or in altering the SDS mortality rate.

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Section: Discussionsupporting

confidence: 92%

Section: Discussioncontrasting

confidence: 51%

Light Intensity Effects on Performance, Activity, Leg Disorders, and Sudden Death Syndrome of Roaster Chickens

1986

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“…Broiler chickens have usually been kept on a continuous or nearly continuous lighting (CL) schedule so as to maximize feed intake and growth rate. However it has been reported that performance of broiler chickens is improved by intermittent lighting (IL) schedules compared with such CL (Savory, 1976;Dorminey and Nakaue, 1977;Cave, 1981;Deaton et al, 1981). The broiler chickens reared under IL schedules showed a temporary growth delay after change at an early age from CL to IL and manifested catch-up growth during the subsequent period (Renden et al, 1991;Buyse et al, 1996;Ohtani and Tanaka, 1997a,b).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Intermittent Lighting Schedule on Broiler Performance

Rahimi¹,

Rezaei²,

Hafezian³

et al. 2005

International J. of Poultry Science

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Abstract:In an experiment with complete randomized design, the effect of intermittent lighting (1 h L: 3 h D) was studied on performance of 400 broiler chicks from 10 to 42 d of age. During of the experiment feed intake, body weight, feed conversion ratio were measured weekly. Mortality was measured throughout the experiment. At 42 d of age 10 chicks from each treatment were slaughtered for abdominal fat weight. There wasn't significant difference for body weight at 42 d between treatments. Use of intermittent lighting schedule improved feed conversion ratio significantly (P<0.05). Due to decrease fat deposition, intermittent lighting program reduced abdominal fat percentage (P<0.05). There wasn't significant difference between treatments for mortality. In conclusion, since physical activity is very low during darkness, and energy expenditure for activity is reduced, therefore use of intermittent lighting program enhanced production efficiency, reduced room temperature and cost of electricity.

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“…Each broiler was provided with .08 m 2 floor space. The brooding and growing procedures were outlined by Dorminey and Nakaue (1977). Mash feed and water were provided ad libitum throughout the test.…”

Section: Methodsmentioning

confidence: 99%

Effect of Mount St. Helens’ Volcanic Ash on Broiler Performance and Health and on House Environment ,

Nakaue¹,

Pierson²,

Helfer

1982

Poultry Science

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An experiment involving approximately 1300 broilers was carried out in an uninsulated, windowless, negative pressure, mechanically ventilated house to study the effects of Mount St. Helens' volcanic ash (VA) on broiler performance, health, and house environment. Four treatments were no VA exposure or control; one direct application of VA (10 kg/m 2 ) on wood shaving litter at 20 days of age, and either VA blown in the pens for 1 hr (VA1; calculated at 38.2 g/min for 2 hr) or 3 hr (VA3; calculated at 22.6 g/min for 6 hr) in the morning and afternoon, daily, from day 20 of production. Volcanic ash from the June 12, 1980 eruption was used. The birds were exposed to VA for 28 days.No significant differences among the treatments were observed on mean body weights by sexes, feed conversion, ammonia levels in the pens, percent mortality, and carcass quality. As would be expected, total dust levels were higher from 0830 to 1630 hr (8.5 hr) when VA was blown into the pens than during the period with no VA blown into the pens (1630 to 0830 hr; 15.5 hr). There was some recycling of dust during the period with no ash infusion. Respiratory dust levels (particles ranging in size from .5 to 10 um diameter) were significantly higher in direct application and VA3 treated pens than either the control or VA1 treated pens. Mean litter moisture levels were significantly lower in VA3 than in VA1 treated pens, but both ash treatments had significantly lower litter moisture levels than in the control pens. In the lung tissues, varying degrees of lymphoid hyperplasia, smooth muscle hyperplasia, and macrophage infiltration were found. In birds exposed for 28 days either to VA1 or VA3 treatments, crystalline structures were found in alveolar macrophages. Moderate lymphoid hyperplasia was found in the lung tissue from birds exposed to either direct application of VA on the litter or no exposure to VA. Microscopic examination of the turbinates for all treatments revealed no significant changes. There was a random distribution of mild tracheitis in all birds examined from all treatments. Broiler performance, carcass quality, and health were not affected, even though lung tissues were damaged by prolonged exposure of broilers to the dusty environment created in this study. (

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Intermittent Light and Light Intensity Effects on Broilers in Light-Proof Pens ,

Cited by 17 publications

References 21 publications

Light Intensity Effects on Performance, Activity, Leg Disorders, and Sudden Death Syndrome of Roaster Chickens

Light Intensity Effects on Performance, Activity, Leg Disorders, and Sudden Death Syndrome of Roaster Chickens

The Effect of Intermittent Lighting Schedule on Broiler Performance

Effect of Mount St. Helens’ Volcanic Ash on Broiler Performance and Health and on House Environment ,

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