Effect of Rearing Program, Body Conformation and Protein Level of Breeder Feed on Broiler Breeder Hen Reproductive Performance

England, J.; Moyle, J.R.; Yoho, D. E.; Bramwell, R. K.; Ekmay, R. D.; Kriseldi, R.; Coon, C. N.

doi:10.3923/ijps.2014.670.679

Cited by 2 publications

(4 citation statements)

References 24 publications

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“…The higher egg weight was probably due to a maximum 14.1% difference in CP intake, as energy intake was comparable for breeders on the different diets ( Heijmans et al, 2021 ). This is in line with other authors, who observed a 0.8 to 5.8 g higher egg weight at comparable breeder ages, when CP intake was increased with 12.5 to 25% ( Joseph et al, 2000 ; England et al, 2014 ; Lesuisse et al, 2017 ). At start of production, dietary CP is an important source for egg formation ( Ekmay et al, 2014 ) and therefore an increase in CP intake might thus be beneficial for egg weight.…”

Section: Discussionsupporting

confidence: 93%

Impact of growth curve and dietary energy-to-protein ratio of broiler breeders on egg quality and egg composition

Heijmans

Duijster²,

Gerrits

et al. 2022

Poultry Science

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Section: Discussionsupporting

confidence: 93%

Impact of growth curve and dietary energy-to-protein ratio of broiler breeders on egg quality and egg composition

Heijmans

Duijster²,

Gerrits

et al. 2022

Poultry Science

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“…This is in line with observations from other studies ( Joseph et al., 2000 ; Lesuisse et al., 2017 , 2018 ), who reduced crude protein content by 25% in the diet. However, studies that reduced crude protein or energy content by 5% to 20% did not observe an effect on egg production during the first phase of lay ( Joseph et al., 2002 ; Sun and Coon, 2005 ; Van Emous et al., 2013 , 2015 , 2018 ; England et al., 2014 ). Maybe more important, these studies only fed a diet lower in protein during either the rearing ( Van Emous et al., 2013 , 2015 ) or the laying phase ( Joseph et al., 2002 ; Sun and Coon, 2005 ; England et al., 2014 ; Van Emous et al., 2018 ).…”

Section: Discussionmentioning

confidence: 90%

“…Breeders fed a higher dietary energy-to-protein ratio had a later age at sexual maturity. However, others did not observe an effect of dietary energy-to-protein ratio on sexual maturation ( Joseph et al., 2002 ; Van Emous et al., 2013 , 2015 , 2018 ; England et al., 2014 ; Lesuisse et al., 2017 , 2018 ; Salas et al., 2019 ). Contradictory to the current study, all these studies altered dietary energy-to-protein ratio by adjusting protein content of the diet, with exemption of the study of Salas et al.…”

Section: Discussionmentioning

confidence: 92%

“…Dietary protein is an important source of egg protein for egg formation ( Ekmay et al., 2014 ) and consequently a reduced protein intake during lay might influence egg weight. A reduction in protein content in the diet (12.5 % to 25%) resulted in a 0.7 g to 4.7 g lower egg weight ( Spratt and Leeson, 1987 ; Joseph et al., 2000 ; England et al., 2014 ; Lesuisse et al., 2017 , 2018 ). These effects were only observed when fed during the laying phase, as a lower crude protein content during the rearing phase alone did not affect egg weight in the laying phase ( Moraes, 2013 ; Van Emous et al., 2013 , 2015 ).…”

Section: Discussionmentioning

confidence: 99%

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Impact of growth curve and dietary energy-to-protein ratio on productive performance of broiler breeders

Heijmans

Duijster²,

Gerrits

et al. 2021

Poultry Science

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The impact of growth curve ( GC ) and dietary energy-to-protein ratio on productive performance of broiler breeder females was investigated from 0 to 60 wk of age. One-day-old pullets (n = 1,536) were randomly allotted to 24 pens according to a 2 × 4 factorial arrangement, with 2 GC (standard growth curve = SGC or elevated growth curve = EGC , +15%) and 4 diets, differing in energy-to-protein ratio (96%, 100%, 104%, or 108% AME n ). Feed allocation per treatment was adapted weekly based on the desired GC, meaning that breeders fed the different diets within each GC were fed according to a paired-gain strategy. Linear and quadratic contrasts for energy-to-protein ratio for each GC were evaluated. Elevated growth curve breeders had an earlier sexual maturity (∆ = 4.1 d) than SGC breeders. Egg weight was higher for EGC breeders (∆ = 2.3 g) than for SGC breeders over the whole laying phase (22–60 wk). No differences between EGC and SGC breeders were observed on settable egg production. An increase in dietary energy-to-protein, at a similar BW, led to a linear increase in age at sexual maturity (β = 0.14 d/% AME n ). From 22 to 40 wk of age, an increase in dietary energy-to-protein ratio led to a linear decrease in egg weight (β = -0.06 g/% AME n ), regardless of GC. An interaction between GC and dietary energy-to-protein ratio was observed on settable egg production in this phase. An increase in dietary energy-to-protein ratio led to a linear decrease on settable egg production, which was more profound in EGC breeders (β = -0.70 eggs/% AME n ) than in SGC breeders (β = -0.19 eggs/% AME n ). From 41 to 60 wk of age, an interaction between GC and dietary energy-to-protein ratio was observed on egg weight. In the EGC, an increase in dietary energy-to-protein ratio led to a linear decrease in egg weight (β = -0.13 g/% AME n ), whereas in the SGC, a linear increase in egg weight was observed (β = 0.03 g/% AME n ). From 41 to 60 wk of age, no differences between diets were observed on settable egg production. It can be concluded that a higher GC of breeders has beneficial effects on egg weight, while maintaining settable egg production. Feeding breeders a lower dietary energy-to-protein ratio stimulated productive performance of broiler breeder hens, mainly during the first phase of lay. This effect was more profound when breeders were fed according to a higher GC.

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Effect of Rearing Program, Body Conformation and Protein Level of Breeder Feed on Broiler Breeder Hen Reproductive Performance

Cited by 2 publications

References 24 publications

Impact of growth curve and dietary energy-to-protein ratio of broiler breeders on egg quality and egg composition

Impact of growth curve and dietary energy-to-protein ratio of broiler breeders on egg quality and egg composition

Impact of growth curve and dietary energy-to-protein ratio on productive performance of broiler breeders

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