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Influence of Different Methionine Sources on Performance and Slaughter Characteristics of Broilers

SIMPLE SUMMARY: The increasing public demand for efficient, sustainably produced poultry meat with simultaneous optimization of animal welfare is calling for amendments in meat production. A starting point to meet this demand consists of complete diets for broilers with reduced crude protein content...

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Autores principales: Ullrich, Cristina, Langeheine, Marion, Brehm, Ralph, Taube, Venja, Rosillo Galera, Mercedes, Rohn, Karl, Popp, Johanna, Visscher, Christian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
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Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6912822/
https://www.ncbi.nlm.nih.gov/pubmed/31752397
http://dx.doi.org/10.3390/ani9110984
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author Ullrich, Cristina
Langeheine, Marion
Brehm, Ralph
Taube, Venja
Rosillo Galera, Mercedes
Rohn, Karl
Popp, Johanna
Visscher, Christian
author_facet Ullrich, Cristina
Langeheine, Marion
Brehm, Ralph
Taube, Venja
Rosillo Galera, Mercedes
Rohn, Karl
Popp, Johanna
Visscher, Christian
author_sort Ullrich, Cristina
collection PubMed
description SIMPLE SUMMARY: The increasing public demand for efficient, sustainably produced poultry meat with simultaneous optimization of animal welfare is calling for amendments in meat production. A starting point to meet this demand consists of complete diets for broilers with reduced crude protein content, supplemented with higher amounts of crystalline amino acids. This ensures sufficient nutritional supply and decreased nitrogen excretion for environmental relief. To optimize the performance and health, despite the drastically reduced protein content (~17.5% finisher diet), the present study compared different methionine sources (methionine hydroxy analog, DL-methionine, and L-methionine) in slightly higher dosages than found in practice, in comparison to a diet meeting the methionine requirements using methionine hydroxy analog. Methionine is the first limiting amino acid and has a significant influence on the health and growth of the animals. The results of the feeding trial showed no differences concerning general health, ileal histology, and performance data of broilers before slaughter. However, the composition of the breast meat differed significantly (highest protein content and lowest fat content in the L-methionine group), and thus provides the impetus for further research. ABSTRACT: Sustainably produced poultry meat with consideration of animal health poses a challenge for broiler production. Low protein diets with high amounts of synthetic amino acids (AAs) like methionine (Met) are the consequence. In a five-week feeding trial, 360 broilers (Ross 308) assigned to four feeding groups were offered protein-reduced complete diets (starter: 20% crude protein (CP); grower: 18.5% CP; finisher: 17.5% CP), supplemented with essential AAs. The “MHA” group received DL-2-hydroxy-4-(methylthio) butanoic acid (DL-HMTBA; trade name: MHA(®)), groups “L” and “DL” the respective Met source in equivalent concentrations each exceeding the nutritional recommendations. “R-MHA” (“R” for “reduced”) received the minimum required level (using MHA as Met source). Performance exceeded performance goals without differences between the groups. The average feed conversion ratio (FCR) amounted to 1.35. The carcass/body weight ratio of R-MHA was significantly lower (0.782) compared to DL (0.808) and L (0.809). Breast meat of R-MHA contained significantly more fat (144 g/kg dry matter (DM)) compared to L (104 g/kg DM) and significantly lower CP content (R-MHA: 838 g/kg DM; L: 875 g/kg DM). The results indicated possible improvement in slaughter yield by protein-reduced diets supplemented with L-Met, thus recommending further research focusing on the Met influence.
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spelling pubmed-69128222020-01-02 Influence of Different Methionine Sources on Performance and Slaughter Characteristics of Broilers Ullrich, Cristina Langeheine, Marion Brehm, Ralph Taube, Venja Rosillo Galera, Mercedes Rohn, Karl Popp, Johanna Visscher, Christian Animals (Basel) Article SIMPLE SUMMARY: The increasing public demand for efficient, sustainably produced poultry meat with simultaneous optimization of animal welfare is calling for amendments in meat production. A starting point to meet this demand consists of complete diets for broilers with reduced crude protein content, supplemented with higher amounts of crystalline amino acids. This ensures sufficient nutritional supply and decreased nitrogen excretion for environmental relief. To optimize the performance and health, despite the drastically reduced protein content (~17.5% finisher diet), the present study compared different methionine sources (methionine hydroxy analog, DL-methionine, and L-methionine) in slightly higher dosages than found in practice, in comparison to a diet meeting the methionine requirements using methionine hydroxy analog. Methionine is the first limiting amino acid and has a significant influence on the health and growth of the animals. The results of the feeding trial showed no differences concerning general health, ileal histology, and performance data of broilers before slaughter. However, the composition of the breast meat differed significantly (highest protein content and lowest fat content in the L-methionine group), and thus provides the impetus for further research. ABSTRACT: Sustainably produced poultry meat with consideration of animal health poses a challenge for broiler production. Low protein diets with high amounts of synthetic amino acids (AAs) like methionine (Met) are the consequence. In a five-week feeding trial, 360 broilers (Ross 308) assigned to four feeding groups were offered protein-reduced complete diets (starter: 20% crude protein (CP); grower: 18.5% CP; finisher: 17.5% CP), supplemented with essential AAs. The “MHA” group received DL-2-hydroxy-4-(methylthio) butanoic acid (DL-HMTBA; trade name: MHA(®)), groups “L” and “DL” the respective Met source in equivalent concentrations each exceeding the nutritional recommendations. “R-MHA” (“R” for “reduced”) received the minimum required level (using MHA as Met source). Performance exceeded performance goals without differences between the groups. The average feed conversion ratio (FCR) amounted to 1.35. The carcass/body weight ratio of R-MHA was significantly lower (0.782) compared to DL (0.808) and L (0.809). Breast meat of R-MHA contained significantly more fat (144 g/kg dry matter (DM)) compared to L (104 g/kg DM) and significantly lower CP content (R-MHA: 838 g/kg DM; L: 875 g/kg DM). The results indicated possible improvement in slaughter yield by protein-reduced diets supplemented with L-Met, thus recommending further research focusing on the Met influence. MDPI 2019-11-19 /pmc/articles/PMC6912822/ /pubmed/31752397 http://dx.doi.org/10.3390/ani9110984 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ullrich, Cristina
Langeheine, Marion
Brehm, Ralph
Taube, Venja
Rosillo Galera, Mercedes
Rohn, Karl
Popp, Johanna
Visscher, Christian
Influence of Different Methionine Sources on Performance and Slaughter Characteristics of Broilers
title Influence of Different Methionine Sources on Performance and Slaughter Characteristics of Broilers
title_full Influence of Different Methionine Sources on Performance and Slaughter Characteristics of Broilers
title_fullStr Influence of Different Methionine Sources on Performance and Slaughter Characteristics of Broilers
title_full_unstemmed Influence of Different Methionine Sources on Performance and Slaughter Characteristics of Broilers
title_short Influence of Different Methionine Sources on Performance and Slaughter Characteristics of Broilers
title_sort influence of different methionine sources on performance and slaughter characteristics of broilers
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6912822/
https://www.ncbi.nlm.nih.gov/pubmed/31752397
http://dx.doi.org/10.3390/ani9110984
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