Palavras-chave
fumonisinas
grãos de milho
nutrientes
microbiota fúngica
Como Citar
Resumo
O presente experimento teve como objetivo correlacionar os resultados obtidos da microbiota fúngica e produção de micotoxinas com os níveis de nitrogênio, zinco e boro utilizados no plantio do milho. Foram realizados tratamentos com quatro concentrações de nitrogênio (0, 50, 100 e 150 kg/ha) de forma interativa com duas concentrações de zinco (0,5 e 1,0 kg/ha), duas concentrações de boro (0,25 e 0,5 kg/ ha) e duas concentrações de zinco mais boro (0,5 e 1,0; 0,25 e 0,5 kg/ha respectivamente), perfazendo um total de 25 tratamentos. A média de contaminação das amostras de milho pelos gêneros Aspergillus, Penicillium e Fusarium foi de 42,7; 38,9 e 41,5% respectivamente, principalmente na faixa de 0,53 a 0,63 de atividade de água. A análise de fumonisinas revelou uma contaminação em 100% das amostras, em níveis que variaram de 1,7 a 27,9 mg/kg para FB 1 e de 0,3 a 11,2 mg/kg para FB 2 . Foi detectada aflatoxina B 1 em 7 amostras de milho (16,0 a 1858,3 μ g/kg) e B 2 em 3 amostras (14,6 a 110,3 μ g/kg). A Análise de Variância demonstrou que o nitrogênio foi positivamente significativo (p<0,05) sobre a porcentagem de contaminação pelo gênero Fusarium , enquanto que para o gênero Aspergillus foi negativamente significativo (p<0,10).
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Este trabalho está licenciado sob uma licença Creative Commons Attribution 4.0 International License.
Copyright (c) 2006 Regina H. Hassegawa, Patrícia Zorzete, Tatiana A. Reis, Antonio Luiz Fancelli, Homero Fonseca, Adriana P. de Almeida, Benedito Corrêa