This study aimed to evaluate the influence of particle size and time of storage on the
quality chemical, stability and the incidence of aerobic microorganisms on silage aerial
part of cassava. We made experimental mini-silos containing the shoot of cassava
(stems and leaves) that received different sizes of particles (0, 1.5, 2.5 and 3.5 cm) and
time of storage, 3, 15, 30 and 45 days. In the first stage of work, looked up the chemical
composition of this material, then getting the levels of dry matter (DM), crude protein
(CP), mineral material (MM), neutral detergent fiber (NDF), acid detergent fiber,
(FDA), ether extract (EE), lignin, pH and buffer power (PT). At the end of the analysis
concluded that the treatment that received no grinding, particle size of 0.0 cm, showed
the highest levels bromatologics for silage of the aerial part of cassava and the best time
was the storage of 30 days. In the second phase was observed aerobic stability of silage
of the aerial part of manioc, where for 10 days, twice a day (8:00 and 15:00 h), was
collected at room temperature and the temperature of silage with the aid of a digital
thermometer. The degradation occurred only when the temperature of the silage reached
2 ° C above the ambient temperature, the latter ranged from 23.5 to 28 ° C. From this
observation evidenced out that the largest decline occurred in the sixth day, thus say that
the silage can be considered stable. The last phase of this work consisted of isolation,
characterization and quantification of microorganisms incidents on silage of the aerial
part of cassava. At that stage it was observed that treatment with 15 days of storage
obtained a higher occurrence of microorganisms, which are bacteria totals. / Este trabalho teve como objetivo avaliar a influência do tamanho de partículas e tempo
de armazenamento sobre a qualidade bromatológica e a incidência de microrganismos
na silagem da parte aérea de mandioca. Foram confeccionados mini-silos experimentais
contendo a parte aérea de mandioca (hastes e folhas) que receberam tamanhos de
partículas diferentes (sem corte; 1,5; 2,5 e 3,5 cm) as quais foram armazenadas por
tempo de armazenamento de 3, 15, 30 e 45 dias. Inicialmente, analisou-se a composição
bromatológica desse material, obtendo então os níveis de matéria seca (MS), proteína
bruta (PB), material mineral (MM), fibra de detergente neutro (FDN), fibra de
detergente ácido (FDA), extrato etéreo (EE), lignina, pH e poder tampão (PT). O
tratamento que não recebeu trituração (0,0 cm), apresentou os melhores níveis
bromatológicos para a silagem da parte aérea da mandioca e o melhor tempo de
armazenamento foi o de 30 dias. A última fase deste trabalho constou do isolamento,
caracterização e quantificação de microrganismos incidentes na silagem da parte aérea
da mandioca. Nessa etapa observou-se que os tratamentos com 15 dias de
armazenamento obtiveram a maior ocorrência de microrganismos, sendo eles prováveis
bactérias totais.
| Identifer | oai:union.ndltd.org:IBICT/oai:www.repositorio.ufal.br:riufal/206 |
| Date | 05 March 2008 |
| Creators | Carvalho, Cenira Monteiro de |
| Contributors | Amorim, Edna Peixoto da Rocha, AMORIM, E. P. R., Miranda, Edma Carvalho de, MIRANDA, E. C., Santiago, Antonio Dias, SANTIAGO, A. D., Oliveira, Mauro Wagner de, OLIVEIRA, Mauro Wagner de |
| Publisher | Universidade Federal de Alagoas, BR, Agronomia; Produção vegetal; Proteção de plantas, Programa de Pós-Graduação em Agronomia, UFAL |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFAL, instname:Universidade Federal de Alagoas, instacron:UFAL |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | bitstream:http://www.repositorio.ufal.br:8080/bitstream/riufal/206/1/Dissertacao_CeniraMonteirodeCarvalho_2008.pdf, bitstream:http://www.repositorio.ufal.br:8080/bitstream/riufal/206/2/Dissertacao_CeniraMonteirodeCarvalho_2008.pdf.txt |
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