Yield and Composition of Edible Meat From Male Broilers as Influenced by Dietary Protein Level and Amino Acid Supplementation

Summers, J. D.; Leeson, S.; Spratt, D.

doi:10.4141/cjas88-024

Cited by 40 publications

(20 citation statements)

References 3 publications

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“…Summers et al (1988) reported no decrease in breast meat yield at 21 days of age in birds fed low-protein diets. On the other hand, birds fed low-protein diets in the initial phase had lower breast yield at 42, 49 and 56 days of age (Salmon et al, 1983).…”

Section: Resultsmentioning

confidence: 99%

Protein levels and environmental temperature effects on carcass characteristics, performance, and nitrogen excretion of broiler chickens from 7 to 21 days of age

Filho

Rosa

Vieira

et al. 2005

Rev. Bras. Cienc. Avic.

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This trial was conducted to evaluate the utilization of low-protein diets formulated based on the ideal protein concept for broiler chickens from 7 to 21 days of age reared at different environmental temperatures. Nine hundred male Cobb-500 ® chickens were used. At day seven chicks were distributed according to a completely randomized design in a 3 x 3 factorial with four replications of 25 birds each. It was used three crude protein levels in the diet (21.5; 20.0 and 18.5%) and three environmental temperatures (low, thermoneutral and high). The performance, carcass characteristics (yield and chemical composition), and nitrogen ingestion and excretion were assessed. There was no significant interaction among the factors for the evaluated variables. Environmental temperatures affected differently chicken performance. High environmental temperature resulted in lower weight gain and higher wing fat percentage, whereas cold temperature resulted in higher feed conversion. On the other hand, low-protein diets decreased weight gain, breast yield, nitrogen excretion and influenced breast and wings chemical composition. Birds reared at high environmental temperature showed lower nitrogen intake and excretion. The results showed that the decrease in protein levels from 7 to 21 days of age contributed to lower nitrogen excretion in broiler chickens, but impaired performance and carcass characteristics independent of rearing temperature.

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Section: Resultsmentioning

confidence: 99%

Protein levels and environmental temperature effects on carcass characteristics, performance, and nitrogen excretion of broiler chickens from 7 to 21 days of age

Filho

Rosa

Vieira

et al. 2005

Rev. Bras. Cienc. Avic.

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“…Chicken products taken from the breast are considered white meat. Breast meat makes up approximately 30% of the edible carcass meat and 50% of edible protein (Summers et al, 1988). Cutting up and further processing chickens add value to the product and increase convenience to consumers.…”

Section: Introductionmentioning

confidence: 99%

“…Also, antioxidants have been used to maximise growth and yield and to maintain or improve breast meat functional properties (Gladine et al, 2007;Jang et al, 2008). However, breast meat yield was little affected by diet composition (Summers et al, 1988).…”

Section: Introductionmentioning

confidence: 99%

The Performance and Characteristics of Carcass and Breast Meat of Broiler Chickens Fed Diets Containing Flaxseed Meal

Shafey

Mahmoud

Hussein

et al. 2014

Italian Journal of Animal Science

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The effects of flaxseed meal (FSM) feeding on the performance (weight gain, feed intake and feed conversion ratio), carcass characteristics and pectoral muscles fillets [major (PMJ) and minor (PMN)] quality [shear force, pH and cooking water loss percentage (CWLP)] and colour [redness (a*), lightness (L*) and yellowness (b*)] were evaluated in a factorial design experiment with five graded levels of FSM (0, 20, 40, 60 and 80 g) and sex of broiler chickens from 21 to 39 days (d) of age. The addition of FSM to the diet did not affect the performance and carcass characteristics, but significantly (P<0.05) increased CWLP and reduced pH of the PMJ (80>20=0, and 80<60=40=20=0 g FSM/kg) and PMN (80>40=20=0 g and 80<60=20=0 g FSM/kg), and (P<0.01) increased a* value of the PMJ (80=60>40 g FSM/kg). The male birds had significantly (P<0.01) higher performance, L* value of the PMN and lower a* value of the PMN than females. The breast weight of males fed 20 g FSM/kg was significantly (P<0.05) higher than that of females. However, higher dietary levels of FSM/kg increased breast weight of females when compared with those of males. It was concluded that the addition of up to 80 g FSM/kg to the diet during 21 to 39 d did not affect the performance and carcass characteristics of broiler chickens, and that of 80 g FSM/kg increased CWLP and reduced pH of PMs. Sex of birds influenced the performance and characteristics of PMs.

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“…Adverse effects in performance and carcass yield are perfectly possible in this period due to lysine limitation, since its contents in meat are exceptionally high. Besides, breast meat represents around 30% of total broiler meat and 50% of total edible protein (Summers et al, 1988).…”

Section: Introductionmentioning

confidence: 99%

Energy and lysine for broilers from 44 to 55 days of age

Araújo

Junqueira

Araújo

et al. 2005

Rev. Bras. Cienc. Avic.

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An experiment was conducted to evaluate the performance and carcass yield of broilers at 55 days of age fed diets with different levels of metabolizable energy and lysine. Evaluated data of performance were weight gain, feed intake, energy intake, lysine intake, caloric conversion and feed conversion. Carcass assessment was performed based on data from carcass yield, breast weight, whole wings, whole legs, back, head + neck, feet and abdominal fat. A 3 x 3 factorial arrangement was used, with 3 levels of metabolizable energy (3,200; 3,400 and 3,600 kcal ME/kg) and 3 lysine levels (0.95%; 1.05% and 1.15%). There was no interaction between the two factors. Nevertheless, increasing levels of metabolizable energy improved weight gain (745 g; 841 g and 910 g, respectively) and feed intake was higher in broilers receiving the diets with 3,200 and 3,600 kcal ME/kg. Overall performance was not affected by lysine levels. Feed conversion values were 2.69, 2.42 and 2.14 for birds fed diets with 3,200; 3,400 and 3,600 kcal ME/kg, respectively. Carcass yield and breast weight increased with higher levels of energy and lysine in the diets.

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Yield and Composition of Edible Meat From Male Broilers as Influenced by Dietary Protein Level and Amino Acid Supplementation

Cited by 40 publications

References 3 publications

Protein levels and environmental temperature effects on carcass characteristics, performance, and nitrogen excretion of broiler chickens from 7 to 21 days of age

Protein levels and environmental temperature effects on carcass characteristics, performance, and nitrogen excretion of broiler chickens from 7 to 21 days of age

The Performance and Characteristics of Carcass and Breast Meat of Broiler Chickens Fed Diets Containing Flaxseed Meal

Energy and lysine for broilers from 44 to 55 days of age

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