Efeito de diferentes níveis de proteína e energia no desempenho de fêmeas Plymouth rock barrada na fase de postura

Rosa, Alexandre Pires; Zanella, Irineo; Vieira, Neventon Santi

doi:10.1590/s0103-84781996000200021

Cited by 5 publications

(8 citation statements)

References 14 publications

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“…The obtained lower egg production when highenergy diets were fed is consistent with the finding of Rosa et al (1996), who observed higher egg production when layers were fed 2800 kcal ME/kg compared with those fed 3100 kcal ME/kg. This may have been due to the lower feed intake of the hen fed the diet with 3100 kcal ME/kg and 15% CP, and the resulting lower energy intake reduced egg production.…”

Section: Crude Protein and Metabolizable Energy Levels For Layers Reasupporting

confidence: 90%

Crude protein and metabolizable energy levels for layers reared in hot climates

Almeida

Dias

Bueno

et al. 2012

Rev. Bras. Cienc. Avic.

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Thermal homeostasis, nutrition, environmental temperature, cloacal temperature. ABSTRACTThe objective of the present study was to evaluate the effects of different dietary crude protein (CP) and metabolizable energy (ME) levels on the performance, internal and external egg quality, and cloacal temperature of commercial layers reared in hot climate. In this trial, 100 commercial Hy-Line W-36 layers between 20 and 32 weeks of age were distributed according to a completely randomized experimental design with a 2 x 2 factorial arrangement, consisting of two CP levels (15 e 18%) and two ME contents (2700 and 3100 kcal/kg) with five replicates per treatment and 10 birds per replicate. Performance (feed intake, egg production, egg mass, and feed conversion ratio), internal (Haugh units and albumen and yolk percentage) and external (eggshell % and thickness) egg quality parameters were evaluated. Cloacal temperature was measured in two birds per replicate at 8:00 h and 13:00 h. The diet containing 2700 kcal ME/kg promoted the best performance, whereas the worse performance observed in birds fed the diet with 3100 ME/ kg was partially recovered when the diet contained 18% CP. Haugh units worsened as dietary CP level increased. The other external and internal egg quality parameters were not affected by dietary CP or ME levels. The cloacal temperature of birds fed 15% CP was lower in the morning and higher in the afternoon relative to those fed 18% CP, which temperature did not change during the day. It was concluded that dietary CP and ME levels influenced the performance and the body temperature of commercial layers.

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Section: Crude Protein and Metabolizable Energy Levels For Layers Reasupporting

confidence: 90%

Crude protein and metabolizable energy levels for layers reared in hot climates

Almeida

Dias

Bueno

et al. 2012

Rev. Bras. Cienc. Avic.

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“…The results obtained in the present experiment with dietary oil addition are consistent with those of Shafey et al (1992), who fed three different layer strains with diets with the same amount of calories, containing different cereals and with or without the addition of 2% of soybean oil, and did not find any significant effect (P>0.05) on body weight gain.…”

Section: Resultssupporting

confidence: 91%

“…The higher final body weight resulting from the increase in dietary ME was also obtained by Attia et al (1995), Rosa et al (1997) and Xavier & Peixoto (1997), who fed layers with diets with increasing ME levels and concluded that increasing the dietary energy density increases body weight. On the other hand, Araújo & Peixoto (2005), as well as Jalal et al (2006), did not find any significant differences in the body weight of young layers (20 to 35 weeks of age) fed increasing metabolizable energy levels.…”

Section: Resultsmentioning

confidence: 63%

Metabolizable energy and oil intake in brown commercial layers

et al. 2012

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-With the objective to establish the best metabolizable energy (ME) intake for layers, and the best dietary vegetable oil addition level to optimize egg production, an experiment was carried out with 432 30-week-old Hisex Brown layers. Birds were distributed into nine treatments with six replicates of eight birds each according to a 3 × 3 factorial arrangement, consisting of three daily metabolizable energy intake (280, 300 or 320 kcal/bird/day) and three oil levels (0.00; 0.75 and 1.50 g/bird/day). Daily feed intake was limited to 115, 110 and 105 g/bird in order to obtain the desired energy and oil intake in each treatment. The following parameters were evaluated: initial weight, final weight, body weight change, egg production, egg mass, feed conversion ratio per dozen eggs and per egg mass and energy conversion. There was no influence of the treatments on egg production (%) or egg mass (g/bird/day). Final weight and body weight change were significantly affected by increasing energy intake. Feed conversion ratio per egg mass, feed conversion ratio per dozen eggs and energy conversion significantly worsened as a function of the increase in daily energy intake. An energy intake of 280 kcal/bird/day with no addition of dietary oil does not affect layer performance.

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“…Assim, torna-se necessário conhecer o desempenho de diferentes linhagens de poedeira semipesadas submetidas a diferentes níveis desses nutrientes, bem como a determinação dos níveis ideais para proporcionar um bom desempenho e o mínimo custo de produção (ROSA et al, 1997).…”

Section: Introductionunclassified

Níveis de proteína bruta e energia metabolizável na produção e qualidade dos ovos de poedeiras da linhagem Lohmann Brown

et al. 2004

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o objetivo de avaliar o desempenho de 324 poedeiras Lohmann Brown submetidas a diferentes níveis protéicos e energéti-cos entre a 43 a e 55 a semana de idade. As aves foram distribuídas em delineamento experimental inteiramente casualizado num esquema fatorial 3x3, sendo 3 níveis protéicos (15,50, 16,50 e 17,50%) e 3 níveis energéticos (2700, 2800 e 2900 Kcal EM/kg), com 6 repetições e 6 aves por unidade experimental. As variáveis avaliadas foram produção de ovos, massa de ovos, conversão alimentar por massa de ovos, peso do ovo, peso do albúmen, peso da gema e peso da casca e suas respectivas porcentagens. Os níveis de proteína bruta e energia metabolizável não influenciaram significativamente (P>0,05) nenhum dos parâmetros estudados. Os níveis de proteína bruta e energia metabolizável apresentaram efeito linear (P<0,05) apenas para as variáveis, peso e porcentagem do albúmem e da casca, porém não houve interação. Conclui-se, portanto, que os melhores níveis de proteína e energia metabolizável para a produção de poedeiras Lohmann Brown, entre o período de 43 a 55 semanas de idade, foram 17,50% de PB e 2900 Kcal de EM/kg para melhor peso e porcentagem de albúmen e de 15,50% de PB e 2700 Kcal de EM/kg para melhor peso e porcentagem de casca.. Termos para indexação:Albúmem, Energia, Gema, Poedeira, Proteína. ABSTRACTThe experiment was conducted in the Section of Aviculture, of the Department of Animal Science at the Federal University of Paraiba to study the acting of 324 laying hens Lohmann Brown, submitted to different proteins and energy levels among of the 43 a and 55 a week of age. The laying hens were distributed in randomly experimental design in a factorial model 3x3, being 3 crude protein levels (15.50, 16.50 and 17.50%) and 3 energy levels (2700, 2800 and 2900 Kcal ME/kg), with 6 replicates and 6 laying hens for experiment unit. The parameters evaluated were production of eggs, mass of eggs, feed conversion for mass of eggs, weight of the egg, weight of albumen, weight of the yolk and weight of the shell, and their respective percentages. The crude protein and metabolizable energy levels had any significantlive influency (P>0.05) on the studied parameters. Crude protein and metabolizable energy levels shown linear effect (P<.05) only on weight and percentage of the albumen and shell, however there was not interaction on it. In conclusion the best crude protein and metabolizable energy levels for the laying hens Lohmann Brown in the period from 43 to 55 weeks were 17,50% of CP and 2900 Kcal of ME/kg for better weight and albumen percentage and of 15,50% of PB and 2700 Kcal of EM/kg for better weight and shell percentage. INTRODUÇÃOEntre os custos de produção da avicultura, observase que a alimentação participa com aproximadamente 70% e que os níveis de proteína e energia das dietas são as parcelas mais representativas desses custos. Assim, torna-se necessário conhecer o desempenho de diferentes linhagens de poedeira semipesadas submetidas a diferentes níveis desses nutrientes, bem como a determinação dos...

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Efeito de diferentes níveis de proteína e energia no desempenho de fêmeas Plymouth rock barrada na fase de postura

Cited by 5 publications

References 14 publications

Crude protein and metabolizable energy levels for layers reared in hot climates

Crude protein and metabolizable energy levels for layers reared in hot climates

Metabolizable energy and oil intake in brown commercial layers

Níveis de proteína bruta e energia metabolizável na produção e qualidade dos ovos de poedeiras da linhagem Lohmann Brown

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