Detalhes bibliográficos
| Ano de defesa: |
2024 |
| Autor(a) principal: |
Danilo de Souza Sanches |
| Orientador(a): |
Charles Kiefer |
| Banca de defesa: |
Não Informado pela instituição |
| Tipo de documento: |
Tese
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Fundação Universidade Federal de Mato Grosso do Sul
|
| Programa de Pós-Graduação: |
Não Informado pela instituição
|
| Departamento: |
Não Informado pela instituição
|
| País: |
Brasil
|
| Palavras-chave em Português: |
|
| Link de acesso: |
https://repositorio.ufms.br/handle/123456789/9565
|
Resumo: |
The aim of this thesis was to evaluate the economic and productive influence of phytase in poultry and pig feed. In Chapter 1, a study was carried out to evaluate the effects of phytase in broiler chickens on zootechnical performance and nutritional costs, through a systematic review, meta-analysis and technical economic analysis. A database was created by selecting scientific articles published between 2018 and 2023 that dealt with broilers supplemented with phytase. The selection of articles followed the PRISMA flowchart, so 1,892 publications were identified, from which 17 publications were selected based on the eligibility criteria, totaling 15,983 broilers evaluated. The reduction in digestible P in diets without phytase is detrimental to animal performance. The inclusion of phytase in diets with reduced digestible P maintains performance, lowers nutritional costs and reduces the cost of feed per ton of broilers produced by US$ 9.523. A reduction of 0.15% of digestible P in the nutritional matrix of the diet and phytase supplementation are suggested. In Chapter 2, a study was carried out to evaluate the influence of phytase in the diet of growing and finishing pigs on zootechnical performance, carcass characteristics and nutritional costs, by means of a systematic review, meta-analysis and technical-economic analysis. The PRISMA flowchart was used to select scientific articles published between 2016 and 2023. A total of 3,295 publications were found, but after applying the eligibility criteria, only 13 publications were used, giving a total of 2,754 pigs studied. Pigs fed diets with reduced digestible P without phytase show a worsening in performance and generate less revenue for non-bonused pigs. Phytase in diets with reduced digestible P for growing and finishing pigs improves the animals' GPD and PF, without negatively affecting the carcass characteristic at a lower production cost, as it increases the revenue of non-subsidized pigs by US$ 3.69. A reduction of 0.12% of digestible P in the nutritional matrix of the diet is suggested. Keywords: poultry, carcass characteristic, nutritional cost, performance, exogenous enzyme, pig farming |
