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An assessment of the impacts of litter treatments on the litter quality and broiler performance: A systematic review and meta-analysis

OBJECTIVE: The choice of the most suitable litter treatment should be based on scientific evidence. This systematic review assessed the effectiveness of litter treatments on ammonia concentration, pH, moisture and pathogenic microbiota of the litter and their effects on body weight, feed intake, fee...

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Autores principales: de Toledo, Taiani dos Santos, Roll, Aline Arassiana Piccini, Rutz, Fernando, Dallmann, Henrique Müller, Dai Prá, Marcos Antonio, Leite, Fábio Pereira Leivas, Roll, Victor Fernando Büttow
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7202646/
https://www.ncbi.nlm.nih.gov/pubmed/32374780
http://dx.doi.org/10.1371/journal.pone.0232853
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author de Toledo, Taiani dos Santos
Roll, Aline Arassiana Piccini
Rutz, Fernando
Dallmann, Henrique Müller
Dai Prá, Marcos Antonio
Leite, Fábio Pereira Leivas
Roll, Victor Fernando Büttow
author_facet de Toledo, Taiani dos Santos
Roll, Aline Arassiana Piccini
Rutz, Fernando
Dallmann, Henrique Müller
Dai Prá, Marcos Antonio
Leite, Fábio Pereira Leivas
Roll, Victor Fernando Büttow
author_sort de Toledo, Taiani dos Santos
collection PubMed
description OBJECTIVE: The choice of the most suitable litter treatment should be based on scientific evidence. This systematic review assessed the effectiveness of litter treatments on ammonia concentration, pH, moisture and pathogenic microbiota of the litter and their effects on body weight, feed intake, feed conversion and mortality of broilers. METHODS: The systematic literature search was conducted using PubMed (Medline), Google Scholar, ScienceDirect and Scielo databases to retrieve articles published from January 1998 to august 2019. Means, standard deviations and sample sizes were extracted from each study. The response variables were analyzed using the mean difference (MD) or standardized mean difference (SMD), (litter treatment minus control group). All variables were analyzed using random effects meta-analyses. RESULTS: Subgroup meta-analysis revealed that acidifiers reduce pH (P<0.001), moisture (P = 0.002) ammonia (P = 0.011) and pathogenic microbiota (P <0.001) of the litter and improves the weight gain (P = 0.019) and decreases the mortality rate of broilers (P<0.001) when compared with controls. Gypsum had a positive effect on ammonia reduction (P = 0.012) and improved feed conversion (P = 0.023). Alkalizing agents raise the pH (P = 0.035), worsen feed conversion (P<0.001), increase the mortality rate (P <0.001), decrease the moisture content (P<0.001) and reduce the pathogenic microbiota of the litter (P<0.001) once compared to controls. Superphosphate and adsorbents reduce, respectively, pH (P<0.001) and moisture (P = 0.007) of the litter compared to control groups. CONCLUSION: None of the litter treatments influenced the feed intake of broilers. Meta-analyses of the selected studies showed positive and significant effects of the litter treatments on broiler performance and litter quality when compared with controls. Alkalizing was associated with worse feed conversion and high mortality of broilers.
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spelling pubmed-72026462020-05-12 An assessment of the impacts of litter treatments on the litter quality and broiler performance: A systematic review and meta-analysis de Toledo, Taiani dos Santos Roll, Aline Arassiana Piccini Rutz, Fernando Dallmann, Henrique Müller Dai Prá, Marcos Antonio Leite, Fábio Pereira Leivas Roll, Victor Fernando Büttow PLoS One Research Article OBJECTIVE: The choice of the most suitable litter treatment should be based on scientific evidence. This systematic review assessed the effectiveness of litter treatments on ammonia concentration, pH, moisture and pathogenic microbiota of the litter and their effects on body weight, feed intake, feed conversion and mortality of broilers. METHODS: The systematic literature search was conducted using PubMed (Medline), Google Scholar, ScienceDirect and Scielo databases to retrieve articles published from January 1998 to august 2019. Means, standard deviations and sample sizes were extracted from each study. The response variables were analyzed using the mean difference (MD) or standardized mean difference (SMD), (litter treatment minus control group). All variables were analyzed using random effects meta-analyses. RESULTS: Subgroup meta-analysis revealed that acidifiers reduce pH (P<0.001), moisture (P = 0.002) ammonia (P = 0.011) and pathogenic microbiota (P <0.001) of the litter and improves the weight gain (P = 0.019) and decreases the mortality rate of broilers (P<0.001) when compared with controls. Gypsum had a positive effect on ammonia reduction (P = 0.012) and improved feed conversion (P = 0.023). Alkalizing agents raise the pH (P = 0.035), worsen feed conversion (P<0.001), increase the mortality rate (P <0.001), decrease the moisture content (P<0.001) and reduce the pathogenic microbiota of the litter (P<0.001) once compared to controls. Superphosphate and adsorbents reduce, respectively, pH (P<0.001) and moisture (P = 0.007) of the litter compared to control groups. CONCLUSION: None of the litter treatments influenced the feed intake of broilers. Meta-analyses of the selected studies showed positive and significant effects of the litter treatments on broiler performance and litter quality when compared with controls. Alkalizing was associated with worse feed conversion and high mortality of broilers. Public Library of Science 2020-05-06 /pmc/articles/PMC7202646/ /pubmed/32374780 http://dx.doi.org/10.1371/journal.pone.0232853 Text en © 2020 de Toledo et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
de Toledo, Taiani dos Santos
Roll, Aline Arassiana Piccini
Rutz, Fernando
Dallmann, Henrique Müller
Dai Prá, Marcos Antonio
Leite, Fábio Pereira Leivas
Roll, Victor Fernando Büttow
An assessment of the impacts of litter treatments on the litter quality and broiler performance: A systematic review and meta-analysis
title An assessment of the impacts of litter treatments on the litter quality and broiler performance: A systematic review and meta-analysis
title_full An assessment of the impacts of litter treatments on the litter quality and broiler performance: A systematic review and meta-analysis
title_fullStr An assessment of the impacts of litter treatments on the litter quality and broiler performance: A systematic review and meta-analysis
title_full_unstemmed An assessment of the impacts of litter treatments on the litter quality and broiler performance: A systematic review and meta-analysis
title_short An assessment of the impacts of litter treatments on the litter quality and broiler performance: A systematic review and meta-analysis
title_sort assessment of the impacts of litter treatments on the litter quality and broiler performance: a systematic review and meta-analysis
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7202646/
https://www.ncbi.nlm.nih.gov/pubmed/32374780
http://dx.doi.org/10.1371/journal.pone.0232853
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