Detalhes bibliográficos
| Ano de defesa: |
2021 |
| Autor(a) principal: |
Paulo, Lorrayne Moraes de
 |
| Orientador(a): |
Stringhini, José Henrique
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| Banca de defesa: |
Stringhini, José Henrique,
Minafra, Cibele Silva,
Leite, Carla Daniela Suguimoto |
| Tipo de documento: |
Dissertação
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| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal de Goiás
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| Programa de Pós-Graduação: |
Programa de Pós-graduação em Zootecnia (EVZ)
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| Departamento: |
Escola de Veterinária e Zootecnia - EVZ (RG)
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| País: |
Brasil
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| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://repositorio.bc.ufg.br/tede/handle/tede/12003
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Resumo: |
This study aimed to evaluate the apparent metabolizability coefficients of dry matter (MCDM), nitrogen (MCN), apparent metabolizable energy (AME) and the apparent metabolizable energy corrected for nitrogen balance (AMEn) of soybean meals (SM) supplemented with exogenous enzymes. Three metabolism assays were carried out from 14 to 21 days, using the total excreta collection method, with Cobb 500®male broiler chicks. In the first trial, the design used was completely randomized (DIC), with five treatments, five replications containing eight birds per experimental unit, totaling 160 birds. The experimental diets consisted of: Reference diet (DR); DR + 40% of the respective tested soybean meal (A, B, C, D). In the second trial, the design used was completely randomized (DIC), in a 4x2 factorial scheme with eight treatments, five replications containing eight birds per experimental unit, totaling 320 birds. Treatments consisted of: Reference diet (RD); RD + 40% of each bran (A, B, C); with or without protease supplementation. In the third trial, the design used was completely randomized (DIC), with nine treatments, five replications containing eight birds per experimental unit, totaling 360 birds. The treatments consisted of using 40% of a commercial soybean meal in combination with protease, xylanase and amylase, alone or in combination. When evaluating the quality of the different commercial soybean meal used in the region of Goiania, significant differences were observed in the analysis of processing quality assessment, where soybean meal A showed better protein dispersibility (PD) compared to other soybean meal. The results of ureatic activity show that the lowest levels of ureatic activity (UA) were observed in soybean meal B and D. In test 1, a significant effect of the different FS on AMEn was observed, where soybean meal A and B had higher levels. of AMEn. In trial 2, the use of exogenous protease helped to increase the levels of AME, AMEn, MCDM and MCN. In trial 3 a significant effect on AMEn was observed, where the combinations of protease + amylase, xylanase + amylase, protease + xylanase + amylase showed an increase in AMEn. Correlations between AME and AMEn of broiler chickens and bromatological and quality analyzes of soybean meal processing were performed. There were positive correlations between mineral matter (MM) and AME, AMEn, PD and AMEn. Negative correlations were observed between MS and EMA and AMEn. It is concluded that commercialized soybean bran may present differences in the UA or PD contents, and that there may also be differences regarding AMEn depending on the origin. The use of enzymes such as protease can improve both the AME and AMEn contents and the MCDM and MCN. As well as the use of combinations of different enzymes such as protease, xylanase and amylase can improve AMEn levels. It can be observed through correlations that factors such as DM, MM and DP can influence the EMA and AMEn values. |
