Lisina e metionina+cistina digestíveis sobre o desempenho e qualidade de ovos de poedeiras comerciais: Revisão

Domingues, Carla Heloísa de Faria; Sgavioli, Sarah; Praes, M. F. F. M.; Santos, Elaine Talita; Castiblanco, Diana Maryuri Correa; Petrolli, Tiago Goulart; Duarte, Karina Ferreira; Junqueira, Otto Mack

doi:10.22256/pubvet.v10n6.487-493

Cited by 3 publications

(3 citation statements)

References 15 publications

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“…These results were higher than reported for ISA Brown SCLH (62.0-68.6%) between 83 and 100 weeks old (Morales et al, 2018b) and Hissex White SCLH (66.5-82.2%) between 84 and 99 weeks old (Oliveira Filho, 2019). In addition to influencing productive performance, Lys is also related to body protein synthesis, especially in bone tissue and muscle (Domingues et al, 2016).…”

Section: Production Parametersmentioning

confidence: 99%

“…Feed conversion ratio was also lower than recorded by Sariozkan et al (2016) (2.2-2.4 kg feed/kg egg) in Hy-Line Brown SCLH between 81 and 92 weeks old. The amino acid levels in the feed, especially Met+Cys, are essential during the second production cycle since they influence egg size (Domingues et al, 2016).…”

Section: Production Parametersmentioning

confidence: 99%

“…These figures were similar to the reported by the Hy-Line Brown hens management guide (Hy-Line, 2018), between 1920 and 2020 g/hen, and higher than pointed out by Sariozkan et al (2016) (1814.7±19.7 g/hen) for Hy-Line Brown SCLH between 81 and 92 weeks old. Methionine + Cysteine are essential for the gluconeogenesis process in the liver and muscle, affecting hen body recovery (Domingues et al, 2016). The increase in Met+Cys intake resulted in a significant body weight improvement (Kakhki et al, 2016).…”

Section: Production Parametersmentioning

confidence: 99%

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Multivariate modeling strategies to predict nutritional requirements of essential amino acids in semiheavy second-cycle hens

Morales-Suárez¹,

Ospina-Rojas²,

Méndez-Arteaga³

et al. 2021

Revista Brasileira De Zootecnia

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Non-ruminantsFull-length research article Multivariate modeling strategies to predict nutritional requirements of essential amino acids in semiheavy second-cycle hens ABSTRACT -An experiment with 23 diets was performed to evaluate the effect of digestible lysine (Lys), digestible methionine + cysteine (Met+Cys), and digestible threonine (Thr) on egg production of H&N Brown second-cycle laying hens (SCLH) for 20 weeks (92-111 weeks of age) in cages under environmental conditions. Body weight (BW), feed intake (FI), feed conversion ratio (FCR), egg weight (EW), number of hen-housed eggs, and livability were also evaluated during the experiment. Diets were formulated from a central composite design that combined five levels of Lys, Met+Cys, and Thr ranging from 727 to 1159, 662 to 1055, and 552 to 882 mg/kg, respectively. Egg production (EP) data were evaluated through three different modeling strategies: egg production models, multivariate polynomial models, and artificial neural networks (ANN). A cascade-forward neural network with logsigmoid transfer function was selected as the best model according to goodness-offit statistics in both identification and validation data. One of the best scenarios for EP of H&N Brown SCLH under specific outdoor conditions was established at Lys, Met+Cys, and Thr levels of 1138, 1031, and 717 mg/hen• day, respectively. The ANN model may be an appropriate tool to study and predict EP of H&N Brown SCLH based on the combination of three different levels of essential digestible amino acids. The strategies included in this work may contribute to improving poultry performance based on modeling techniques to study other production parameters in terms of different nutritional requirements and productive conditions.

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Section: Production Parametersmentioning

confidence: 99%

Section: Production Parametersmentioning

confidence: 99%

Section: Production Parametersmentioning

confidence: 99%

See 1 more Smart Citation

Multivariate modeling strategies to predict nutritional requirements of essential amino acids in semiheavy second-cycle hens

Morales-Suárez¹,

Ospina-Rojas²,

Méndez-Arteaga³

et al. 2021

Revista Brasileira De Zootecnia

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Effects of oregano (Lippia origanoides) essential oil supplementation on the performance, egg quality, and intestinal morphometry of Isa Brown laying hens

2021

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Background and Aim: The use of antibiotics as growth promoters in the feed of poultry, has contributed to an increase in the antimicrobial resistance of foodborne pathogens worldwide. Hence, the development of new effective alternatives to antibiotics that do not hinder productivity is imperative. For this, the aim of the present study was to determine whether oregano essential oil (OEO) extracted from Lippia origanoides is a suitable alternative to growth-promoting antibiotics (GPAs) for improving the performance, egg quality, and intestinal morphometry of ISA Brown laying hens. Materials and Methods: A total of ninety-six 70-week-old ISA Brown laying hens were randomly assigned to four treatment groups with four replicates per treatment and six hens per replicate. The treatments consisted of four different diets that were formulated according to the nutritional requirements of the genetic line and the production phase with and without the addition of GPA and OEO: NC, which did not contain OEO or GPA; GPA, which included 50 ppm zinc bacitracin as a GPA; 80OEO, which included 80 ppm OEO and no GPA; and 150OEO, which included 150 ppm OEO and no GPA. Results: All of the OEO and GPA treatment groups had a better feed conversion ratio than the NC group. However, the addition of 150 ppm OEO to the diet improved the percentage egg production and egg mass, as well as the external and internal quality of the egg compared with the other treatments. In addition, both the 80OEO and 150OEO treatments improved the yolk color, shell thickness, and shell color, as well as parameters related to the intestinal morphometry compared with the NC group. Conclusion: The findings of this study indicate that 150 ppm OEO can be used as a substitute for GPA to improve the performance, egg quality, and parameters related to the intestinal morphometry of ISA Brown laying hens.

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Artificial Neural Networks for Modeling and Optimizing Egg Cost in Second-Cycle Laying Hens Based on Dietary Intakes of Essential Amino Acids

Morales-Suárez,

Daza,

Váquiro

2023

AgriEngineering

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Egg production is a significant source of animal protein for human consumption. Feed costs significantly impact the profitability of egg production, representing more than 70% of the variable costs. This study evaluated the effect of dietary intakes of three essential amino acids (EAAs) on the egg cost for H&N Brown second-cycle laying hens. The hens were fed for 20 weeks with 23 diets that varied in their lysine, methionine + cystine, and threonine contents. These amino acids were derived from both dietary and synthetic sources. Zootechnical results were used to calculate the feed cost per kilogram of egg (FCK), considering the cost of raw materials and the diet composition. Multivariate polynomial models and artificial neural networks (ANNs) were validated to predict FCK as a function of the EAAs and time. The EAA intakes that minimize FCK over time were optimized using the best model, a cascade-forward ANN with a softmax transfer function. The optimal scenario for FCK (0.873 USD/kg egg) at 20 weeks was achieved at 943.7 mg lysine/hen-day, 858.3 mg methionine + cystine/hen-day, and 876.8 mg threonine/hen-day. ANNs could be a valuable tool for predicting the egg cost of laying hens based on the nutritional requirements. This could help improve economic efficiency and reduce the feed costs in poultry companies.

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Lisina e metionina+cistina digestíveis sobre o desempenho e qualidade de ovos de poedeiras comerciais: Revisão

Cited by 3 publications

References 15 publications

Multivariate modeling strategies to predict nutritional requirements of essential amino acids in semiheavy second-cycle hens

Multivariate modeling strategies to predict nutritional requirements of essential amino acids in semiheavy second-cycle hens

Effects of oregano (Lippia origanoides) essential oil supplementation on the performance, egg quality, and intestinal morphometry of Isa Brown laying hens

Artificial Neural Networks for Modeling and Optimizing Egg Cost in Second-Cycle Laying Hens Based on Dietary Intakes of Essential Amino Acids

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