Genotype and breeder flock age impact on broiler performance in suboptimal conditions

Lukić, Miloš; Petričević, Veselin; Škrbić, Zdenka; Delić, Nikola; Толимир, Н.; Dosković, Vladimir; Rakonjac, Simeon

doi:10.2298/bah2004447l

Cited by 9 publications

(4 citation statements)

References 9 publications

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“…The EPEF and PER were computed based on the description that was pointed out by Lukić et al [ 15 ] and Kamran et al [ 16 ], respectively,…”

Section: Methodsmentioning

confidence: 99%

Impact of different levels of probiotic on productive performance, nutrient retention of broiler chickens fed low protein diets

Imari,

Alnajm,

Zamil

2023

J Adv Vet Anim Res

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Objective: This research assesses whether probiotics could enhance growth performance and improve nutrient digestibility in birds fed with low-protein diets. Materials and Methods: A total of 250 1-day-old ROSS chicks were used in a completely randomized design consisting of 5 treatments with 5 replicates and 10 birds for each replicate. The experimental diets were as follows: basal diet containing 100% crude protein (CP) according to Nutrition Research Council recommendation (control diet); basal diet containing CP 10% less than the control diet low protein (LP); LP with addition of probiotic by 50 mg/kg diet (LP + P1); LP with addition of probiotics by 100 mg/kg diet (LP + P2); LP with an addition of probiotics by 150 mg/kg diet (LP + P3). Results: Broilers fed with the control, LP + P2, and LP + P3 diets had greater body weight and weight gain than broilers fed with the LP during starter, finisher, and total periods (p < 0.01). The feed conversion ratio was the best (p < 0.01) in the control and LP + P3 treatments compared with the LP and LP + P1 treatments throughout the experiment. The European production efficiency factor was the lowest in the LP treatment compared with other treatments from 1 to 42 days. Protein efficiency ratio and protein retention were both higher in birds fed with the LP + P2 and LP + P3 diets compared to birds given the control and LP diets (p < 0.01). Conclusion: Adding probiotics to the diet remarkably improved the productive performance and nutrient digestibility of broiler-fed low-protein diets.

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“…The EPEF and PER were computed based on the description that was pointed out by Lukić et al [ 15 ] and Kamran et al [ 16 ], respectively,…”

Section: Methodsmentioning

confidence: 99%

Impact of different levels of probiotic on productive performance, nutrient retention of broiler chickens fed low protein diets

Imari,

Alnajm,

Zamil

2023

J Adv Vet Anim Res

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“…It is important to note that the EBI score is always lower than the EPEF score because the average daily weight gain is used to calculate the average EBI [49]. Higher EPEF or EBI index values indicate a more favourable production profit [36,52,53]. In some countries, the EBI operates as an added gauge for determining the growth performance of broilers, calculated for flocks at varying slaughter ages.…”

Section: Production Performance Of Broiler Chickensmentioning

confidence: 99%

Effects of the Addition of Crude Fibre Concentrate on Performance, Welfare and Selected Caecal Bacteria of Broilers

Urban,

Jaworski,

Lange

et al. 2023

Animals

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The study evaluated the effects of crude fibre concentrate supplementation on final body weight, mortality, feed conversion ratio, European Production Efficiency Factor, European Broiler Index, welfare parameters, colony-forming units of selected caecal bacteria (Enterobacteriaceae and lactic acid bacteria) and pH of broiler faeces and litter. The study comprised 990 Ross 308 male chicks divided into three groups, a control and two experimental groups, which were given crude fibre concentrate as a feed supplement. On the thirty-fifth day of rearing, the birds’ welfare scores were evaluated, and 2 g of cecum was collected post-mortem from six chickens in each group. Subsequently, a series of ten-fold dilutions of the material was prepared, followed by cultures and measurement of pH in the faeces and litter. The inclusion of crude fibre concentrate resulted in a beneficial impact on the ultimate body mass (p ≤ 0.001), welfare standard (p ≤ 0.001), and quantity of colony-forming units of lactic acid bacteria (p ≤ 0.05) within the cecum. Furthermore, it had a positive influence on lowering the pH levels of both faeces and litter (p ≤ 0.05).

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“…EBI values are always lower than EPEF, because in the ADG calculation, the chicks' weight to one day is excluded (Van, 2003). Higher EPEF or EBI values indicate better fattening economics (Marcu et al, 2013;Lukić et al, 2020).…”

Section: Original Scientific Papermentioning

confidence: 99%

Influence of Phytobiotics in Feed on the Cost-Effectiveness of Broiler Production During Fattening

Janjić¹,

Savić²,

Marković³

et al. 2022

Meat Technology

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The aim of this study was to determine the effect of using phytobiotics in broiler feed on the economic efficiency parameters of fattening. The study was conducted on 240 broilers originating from a commercial incubator station, and the dietary trial was based on the group-control principle and lasted for 42 days (control group C -without the addition of phytogenic additives; experimental OI group -with the addition of phytogenic additive containing thymol and cinnamaldehyde, 100 g/t of food; experimental OII group -with the addition of phytogenic additive containing cumin, mint, cloves and anise, 150 g/t of food and; experimental OIII group -with the addition of phytogenic additive containing thymol, 750 g/t of food). The production results (body weight, average daily gain, feed conversion ratio) and economic efficiency parameters of broiler fattening were calculated for three intervals (1-10, 1-20 and 1-42 days). All production results in each interval were significantly better (p<0.01) in experimental broilers than in the control broilers. The best values of European factor of production efficiency and European broiler index were recorded in experimental groups that received feed with added phytobiotics (values were significantly higher, p<0.01, than in the control broilers). Also, the results obtained were compared with standard values for COBB 500 hybrids. The values obtained in this research were significantly lower (p<0.05) than standard values for Cobb 500. Analysing the data obtained from our study, the positive effects of including phytogenic additives in broiler feed mixtures were measured.

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Genotype and breeder flock age impact on broiler performance in suboptimal conditions

Cited by 9 publications

References 9 publications

Impact of different levels of probiotic on productive performance, nutrient retention of broiler chickens fed low protein diets

Impact of different levels of probiotic on productive performance, nutrient retention of broiler chickens fed low protein diets

Effects of the Addition of Crude Fibre Concentrate on Performance, Welfare and Selected Caecal Bacteria of Broilers

Influence of Phytobiotics in Feed on the Cost-Effectiveness of Broiler Production During Fattening

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