Poedeiras alimentadas com diferentes níveis de energia e oleo de soja na ração

Costa, Fernando Guilherme Perazzo; Quirino, B.J.S.; Givisiez, Patrícia Emília Naves; Silva, J.H.V.; Junior, Heleno Almeida; Costa, Jeronimo S.; Oliveira, Cléber Franklin Santos de; Goulart, C.C.

doi:10.4321/s0004-05922009000300009

Cited by 2 publications

(10 citation statements)

References 6 publications

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“…ME levels did not influence egg weight, as previously reported by Costa et al (2009). Relative to feed conversion ratio, the highest CP and ME levels generated the best results.…”

Section: Crude Protein and Metabolizable Energy Levels For Layers Reasupporting

confidence: 69%

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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“…ME levels did not influence egg weight, as previously reported by Costa et al (2009). Relative to feed conversion ratio, the highest CP and ME levels generated the best results.…”

Section: Crude Protein and Metabolizable Energy Levels For Layers Reasupporting

confidence: 69%

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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“…There was no influence of the treatments on egg production (Table 5). Similar results were also obtained by , Wu et al (2007), Jalal et al (2007) and Costa et al (2009), who fed layers with different ME levels and concluded that the dietary energy level did not cause any significant effect (P>0.05) on egg production. However, Araújo & Peixoto (2005) observed instead a reduction in egg production (P<0.05) as the dietary energy level increased, whereas Valkonen et al (2008) obtained an increase in egg production with increasing dietary energy levels; however, the latter worked with energy levels lower than those used in the present study and those recommended in the literature (2345 to 2629 kcal ME/kg feed).…”

Section: Resultssupporting

confidence: 78%

“…There was no influence of energy and oil levels on egg mass, as previously observed by Jalal et al (2007), Valkonen et al (2008) and Costa et al (2009), who fed layers with diets containing different energy levels and also did not find any effect on egg mass. However, Wu et al (2007) observed an increase in egg mass as the dietary ME level increased.…”

Section: Resultssupporting

confidence: 68%

“…Although some studies have demonstrated that egg production is not affected by the dietary energy content (Harms et al, 2000), Valkonen et al (2008) obtained higher egg production in layers fed energy-rich diets, and Faria & Silva (2004) observed that when energy intake is deficient, egg production is compromised.…”

Section: Introductionmentioning

confidence: 99%

“…According to Pinto et al (2002), although fats increase feed palatability and reduce metabolic heat increment, feeds containing oil usually have higher metabolizable energy (ME) levels. Costa et al (2009) evaluated different soybean oil levels (1, 2 and 3%) and metabolizable energy levels (2600, 2750 and 2900 kcal/kg) in layer diets, and observed that the lowest energy level (2600 ME/kg) promoted the best utilization of energy, and consequently, of the other dietary nutrients. Those authors verified that the inclusion of up to 3% soybean oil was not sufficient to improve energy conversions, and therefore, no significant improvement in the utilization was obtained, as shown by the lack of effect on egg production or in the weight of the egg and its components (eggshell, yolk, and albumen).…”

Section: Introductionmentioning

confidence: 99%

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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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Poedeiras alimentadas com diferentes níveis de energia e oleo de soja na ração

Cited by 2 publications

References 6 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

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