FAMES E ATIVIDADES MICROBIANAS ENVOLVIDAS NA SUPRESSÃO DA PODRIDÃO RADICULAR DA MANDIOCA POR MATÉRIA ORGÂNICA

Autores

  • Jéssica Morais da Silva Academic unit of Garanhuns, Universidade Federal Rural de Pernambuco, Garanhuns, PE
  • Erika Valente de Medeiros Academic unit of Garanhuns, Universidade Federal Rural de Pernambuco, Garanhuns, PE
  • Gustavo Pereira Duda Academic unit of Garanhuns, Universidade Federal Rural de Pernambuco, Garanhuns, PE
  • Gustavo Pereira Duda Academic unit of Garanhuns, Universidade Federal Rural de Pernambuco, Garanhuns, PE
  • Jamilly Alves de Barros Department of soil. Universidade Federal Rural de Pernambuco, Recife, PE
  • Uemeson José dos Santos Department of nuclear energy, Universidade Federal de Pernambuco, Recife, PE

DOI:

https://doi.org/10.1590/1983-21252017v30n319rc

Palavras-chave:

Manihot esculenta. Fusarium solani. Resíduo de café. Enzimas extracelulares do solo. Estrutura da comunidade microbiana.

Resumo

A incorporação da matéria orgânica é usada no manejo de doenças causadas por patógenos habitantes do solo, mas existe uma lacuna no uso de resíduos de café na supressão de doenças. O objetivo deste estudo foi avaliar o efeito de fontes de matéria orgânica contra a podridão radicular da mandioca, causada por Fusarium solani CFF 109. A fertilização com resíduo de café (CR), esterco bovino (CM), húmus de minhoca (EE) e esterco caprino (GM) resultou na supressão da podridão radicular da mandioca. Os tratamentos CR e CM apresentaram alta redução na severidade da doença em mandioca. Houveram mudanças na estrutura da comunidade microbiana do solo pela incorporação de matéria orgânica, principalmente na população de fungos totais e bactérias Gram-negativa. O carbono orgânico total e magnésio são negativamente associados com a severidade da doença. O quociente microbiano, fosfatases alcalina e ácida foram positivamente e o biomarcador a-15:0 foi negativamente associado com a severidade da doença. Este estudo indica que resíduos agroindustriais podem ser reciclados para fornecer matéria orgânica e nutrientes com efeito para o manejo de doenças de plantas por suprimir patógenos habitantes do solo. Esta é a primeira evidência que o resíduo da indústria de café pode ser usado no manejo da podridão radicular da mandioca, causado por F. solani.

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Publicado

21-03-2017

Edição

Seção

Agronomia