Effect of diets with different energy concentrations on growth performance, carcass characteristics and meat chemical composition of broiler chickens in dry tropics

Infante-Rodríguez, Fidel; Salinas-Chavira, J.; Montaño-Gómez, M. F.; Manríquez-Nuñez, Olga M.; González-Vizcarra, Víctor M.; Guevara-Florentino, O. F.; León, José Alberto Ramírez de

doi:10.1186/s40064-016-3608-0

Cited by 38 publications

(31 citation statements)

References 15 publications

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“…(2017). A similar result was found by Infante-Rodríguez et al (2016) when evaluating rations with increasing levels of metabolisable energy in the 1 to 21-day phase (2960, 3000, 3040, and 3080 Kcal kg -1 of feed) who verified a better FC for broilers fed the diets containing the highest energy levels.…”

Section: Resultssupporting

confidence: 83%

“…Considering the integral period evaluated (37 days), similar to the present experiment, Infante-Rodríguez et al (2016) verified an improvement in the FC of birds fed with higher energy rations. In agreement, Nogueira et al (2013) observed an increase in weight gain and an improvement in feed conversion by birds in response to increased feed energy levels.…”

Section: Concomitantsupporting

confidence: 88%

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Use of emulsifier and lipase in feeds for broiler chickens

Oliveira

Balbino

Silva

et al. 2019

SCA

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The objective of this study was to evaluate the effect of exogenous emulsifier and lipase in diets on performance, digestibility, and organ biometry of broiler chickens. A completely randomised design with seven treatments and seven replications was adopted. The treatments were as follows: T1 (positive control; PC): 3000, 3100, 3200, and 3250 Kcal of metabolisable energy (ME) kg-1 of diet for phases 1 to 10, 11 to 21, 22 to 31, and 32 to 37 days, respectively; T2: PC with reduction in ME of 30 Kcal kg-1 of diet; T3: PC with reduction in ME of 60 Kcal kg-1 of feed; T4 (negative control; NC): PC with reduction in ME of 90 Kcal kg-1 of feed; T5: NC with inclusion of exogenous lipase (10 000 U kg-1); T6: NC with inclusion of emulsifier (250 g t-1); and T7: NC with inclusion of lipase (10 000 U kg-1) and emulsifier (250 g t-1) in the period from 1 to 37 days of rearing. Performance characteristics (weight gain (WG), feed intake (FI), and feed conversion (FC)), carcass yield, cut yield, the relative weight of abdominal fat and organs (small intestine, liver, and pancreas), and relative intestinal length, in addition to dry matter digestibility (CDADM), ethereal extract (CDAEE), crude metabolisable energy (CMACE), and apparent metabolisable energy (AME) of the diets, were evaluated. In the initial phase, the CDAEE was higher for the PC group than for the emulsifier + lipase group. The AME determined in the final phase for the group supplemented with an emulsifier was higher by approximately 50 Kcal (EM) than the NC group. The WG of the lipase group was similar to that of the PC group. However, the groups with emulsifier and emulsifier + lipase showed a lower WG than the PC group. The additives used did not recover the FC to the same level observed in the PC group. The reduction in ME of 90 Kcal kg-1 generated a lower WG and worse FC. The use of both an emulsifier and lipase together produced results like to the PC group. The biometrics of the organs and the carcass yield and cuts were not influenced by diets. Thus, it can be concluded that the inclusion of lipase and an emulsifier improves the performance of broilers given diets with reduced energy, although it does not improve the lipid utilisation of the diets.

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Section: Resultssupporting

confidence: 83%

Section: Concomitantsupporting

confidence: 88%

Use of emulsifier and lipase in feeds for broiler chickens

Oliveira

Balbino

Silva

et al. 2019

SCA

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“…However, the percentage of breast meat yield was not affected by diet in the present experiment. Similar results have been reported previously by van Nguyen and Bunchasak (2005) and Infante-Rodr ıguez et al (2016). On the other hand, the percentage of breast meat yield was decreased in the heat stressed birds.…”

Section: Discussionsupporting

confidence: 92%

Effects of protease supplementation of low protein and/or energy diets on growth performance and blood parameters in broiler chickens under heat stress condition

Law

Zulkifli

Farjam

et al. 2019

Italian Journal of Animal Science

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The effects of feeding low dietary crude protein (CP) and/or metabolisable energy (ME) with or without supplemental protease on growth performance, carcase characteristics and physiological responses in broiler chickens were investigated under cyclic heat stress condition. A total of 350 day-old male broiler chicks were fed with one of the following seven experimental diets: (1) recommended-CP and recommended-ME (RPE, served as control); (2) recommended-CP and low-ME (RPLE); (3) recommended-CP and low-ME with protease (RPLEP); (4) low-CP and recommended-ME (LPRE); (5) low-CP and recommended-ME with protease (LPREP); (6) low-CP and low-ME (LPE) and (7) low-CP and low-ME with protease (LPEP). From 22 to 42 d of age, half of the chickens from each dietary group were exposed to 34 ± 1 C for 7 h daily (heat stress), whereas the other half were raised at constant 23 ± 2 C (normal temperature). Supplementation of protease to RPLE, LPRE and LPE diets had no significant effects on feed intake (FI), weight gain (WG) or feed conversion ratio (FCR). Diet had no effect on serum glucose, total protein, certain acute phase proteins (APPs), corticosterone or breast yield. Regardless of protease supplementation, heat stressed birds had significantly lower FI, WG and breast yield, and higher FCR, APPs and corticosterone compared to birds raised in normal temperature. In conclusion, dietary supplementation of protease to low CP and/or ME diets showed negligible effects on growth performance, carcase characteristic and physiological responses in broiler chickens under heat stress condition. The inclusion of microbial protease in broiler diets could be considered by poultry industry as an effective nutritional tool for reducing ME or CP, in order to decrease abdominal fat deposition, improve feed efficiency and increase the profit margin. HIGHLIGHTS Protease supplementation has no specific help for broilers under heat stress. Feeding low CP and/or ME diet is not stressful for broiler chickens.

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“…Resultados similares fueron obtenidos por Sugeta et al (13); Morais et al (16) y Urdaneta-Rincón y Leeson, (43), razón por la cual la estrategia de supresión alimenticia aplicada en el presente estudio no ejerció ningún efecto negativo sobre la ganancia de peso, lo que sugiere una compensación favorable del crecimiento. En cuanto al CA, este fue ligeramente superior en los animales alimentados ad libitum, registrándose un valor promedio total de 4181.01 ± 306.46 g entre tratamientos, muy similar al calculado por Henn et al (37); Mendes et al (44), e InfanteRodríguez et al (45). Sahraei (12) afirma que la tasa de crecimiento está relacionada con el CA, por lo que la restricción alimenticia podría inhibir considerablemente la GTP; sin embargo, el análisis estadístico arrojó que el CA registrado en el T 3 y T 4 , fue significativamente menor (p < 0.05) con respecto al grupo control, en tal sentido, los criterios prácticos de análisis productivo empleados actualmente por los avicultores, sugieren que el valor calculado de CA en el T 4, probablemente ejerce un impacto económico significativo, considerando que la alimentación constituye el costo variable más alto (46).…”

Section: Análisis Estadísticounclassified

Evaluación del comportamiento productivo de pollos Cobb 500 sometidos a restricción alimenticia como estrategia sostenible de control nutricional

2020

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Se empleó un diseño completamente al azar, distribuyendo 200 pollitos Cobb 500, con aspecto saludable, de un día de edad y peso promedio de 37.34 ± 0.44 g; en cinco grupos con cuatro réplicas de diez polluelos cada una. Durante los 42 días del experimento, las aves recibieron manejo zootécnico tradicional que incluyó dieta comercial isoproteíca (20 % proteína cruda) e isocalórica (3100 kilocaloría (kcal)/kilogramo (kg)). El día 15, la parvada recibió un programa de restricción alimenticia (PRA) según los tratamientos (T) = T0 = consumo ad libitum de alimento concentrado (AC) durante 24 horas (h), T1 = eliminación del AC durante 12 h (20:00-8:00), T2 = supresión de AC por 14 h (18:00-8:00), T3 = 16 h sin acceso a AC (16:00-8:00) y T4 = privación de AC durante 18 h (14:00 y 8:00). Después del día 30, las aves retomaron el libre consumo de AC. Se consideró la ganancia total de peso (GTP), la ganancia diaria de peso (GDP), el consumo de alimento (CA), el factor de conversión alimenticia (FCA), el rendimiento en canal (RC) y la mortalidad (M) como variables respuesta. El análisis estadístico reveló que el PRA no tuvo efecto significativo (p > 0.05) sobre los indicadores productivos evaluados en T0, T1, T2 y T3; sin embargo, el CA fue significativamente menor (p < 0.05) en T3 y T4 comparado con los demás tratamientos. Además, solamente el T4 mostró un FCA menor (p < 0.05) en comparación con los demás tratamientos. Se concluye que un PRA de 18 h durante los días 15 al 30 de edad, favorece los criterios de sostenibilidad al no impactar negativamente en la productividad de las aves

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Effect of diets with different energy concentrations on growth performance, carcass characteristics and meat chemical composition of broiler chickens in dry tropics

Cited by 38 publications

References 15 publications

Use of emulsifier and lipase in feeds for broiler chickens

Use of emulsifier and lipase in feeds for broiler chickens

Effects of protease supplementation of low protein and/or energy diets on growth performance and blood parameters in broiler chickens under heat stress condition

Evaluación del comportamiento productivo de pollos Cobb 500 sometidos a restricción alimenticia como estrategia sostenible de control nutricional

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