Armazenamento de arroz: influência na segurança dos grãos

Autores

DOI:

https://doi.org/10.26461/19.08

Palavras-chave:

Oryza sativa, microrganismos, micotoxinas, insetos

Resumo

A produção de arroz (Oryza sativa) ocupa o quinto lugar nas exportações agrícolas do Uruguai. Condições inadequadas de temperatura e umidade favorecen a ação de insetos e fungos impactando na saúde do grão. O objetivo do trabalho foi avaliar o estado sanitário de casca de arroz em condições de armazenamento em silos comerciais para duas safras. O estudo foi realizado com a variedade de grão longo “El Paso 144” por 8,5 e 7 meses em 2017 e 2018, respectivamente. Os agentes de biodeterioração foram detectados e identifcados e a capacidade de germinação, a contagem microbiana e o conteúdo de toxinas no arroz extraído das áreas superior e inferior do silo foram determinados em diferentes tempos de armazenamento.
A população microbiana diminuiu nos dois anos e nas posições dentro do silo. Dois gêneros micotoxigênicos foram identifcados principalmente: Fusarium sp. e Aspergillus sp. Em relação às micotoxinas, Zearalenona e Ocratoxina-A não foram detectadas, enquanto o Deoxinivalenol foi detectado no máximo em 120 ppb (safra
2017). Não foram prescritas aflatoxinas B1, B2, G1 e G2. Os insetos Sitophilus sp. e Rhizopertha sp. foram detectados com uma incidência máxima de 0,1%. Portanto, as condições de armazenamento não afetaram a segurança do grão.

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Publicado

2019-11-28

Como Citar

Sánchez Figueredo, A., Gómez-Guerrero, B. F., & Billiris, M. A. (2019). Armazenamento de arroz: influência na segurança dos grãos. INNOTEC, (19 ene-jun), 109–124. https://doi.org/10.26461/19.08

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