Simulated natural lighting and constant 14-hour photoperiods for broiler breeders during the rearing period, and interactions of lighting with body weight
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چکیده
منابع مشابه
Simulated natural lighting and constant 14-hour photoperiods
Spring-hatched broiler breeders housed in non-lightproof facilities are frequently maintained on long daylengths to prevent precocity, but controlled-feeding and delayed dissipation of photorefractoriness retard sexual maturation. Trials were conducted to determine the appropriate growth for birds maintained on 14-h photoperiods, and to compare responses with naturally increasing and decreasing...
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Rearing and laying performance following various step-down lighting regimens in the rearing period.
It is frequently recommended that commercial laying pullets are reared on step-down lighting regimens, rather than on constant short photoperiods, to help achieve BW targets during rear and optimal performance in lay. To evaluate the effectiveness of this strategy, Shaver White pullets were maintained on 8-h day lengths or given a step-down lighting regimen from 23 to 8 h over periods of betwee...
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متن کاملLighting during grow-out and Salmonella in broiler flocks
BACKGROUND Lighting is used during conventional broiler grow-out to modify bird behaviour to reach the goals of production and improve bird welfare. The protocols for lighting intensity vary. In a field study, we evaluated if the lighting practices impact the burden of Salmonella in broiler flocks. METHODS Conventional grow-out flocks reared in the states of Alabama, Mississippi and Texas, US...
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ژورنال
عنوان ژورنال: South African Journal of Animal Science
سال: 2007
ISSN: 2221-4062,0375-1589
DOI: 10.4314/sajas.v35i1.4043