Diversidade e eficiência de rizóbios simbiontes de leguminosa arbórea na Amazônia oriental

• Ano de defesa: 2021
• Autor(a) principal: SOUZA, Juliana Lima Brito
• Orientador(a): AGUIAR, Alana das Chagas Ferreira
• Banca de defesa: AGUIAR, Alana das Chagas Ferreira , CORRÊA, Thaís Roseli , BARRETO, Bruno de Souza , COSTA, Patrícia Freitas
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Maranhão
• Programa de Pós-Graduação: PROGRAMA DE PÓS-GRADUAÇÃO EM BIODIVERSIDADE CONSERVAÇÃO/CCBS
• Departamento: DEPARTAMENTO DE BIOLOGIA/CCBS
• País: Brasil
• Palavras-chave em Português: Gliricidia sepium; fixação biológica de nitrogênio; eficiência simbiótica; índice de desenvolvimento vegetal; recuperação de terras degradadas;
• Palavras-chave em Inglês: Gliricidia sepium; biological nitrogen fixation; symbiotic efficiency; plant development index; reclamation of degraded lands.
• Área do conhecimento CNPq: Ciências Biológicas
• Link de acesso: https://tedebc.ufma.br/jspui/handle/tede/4098

Among the challenges to mitigate the low efficiency of waste use in tropical is the understanding of the processes involved in the efficiency of the symbiosis between trees and legumes. In this context, the present work aims to evaluate the phenotypic diversity of rhizobia in symbiosis with Gliricidia sepium, isolated from Amazonian soil, as well as their efficiency in comparison with commercial inoculant and chemical nitrogen fertilization. For the setup of the experiment in a greenhouse and isolation of native rhizobia were used containing soils from a pasture area and an area with secondary pots in position for ten years, using sepium as a trap. Plant development was evaluated using three sources from the native community: control (native bacteria present in the soil); inoculant; and chemical nitrogen fertilizer. As measured variables they serve to construct a plant development index (VDI). The results point to a compatibility of the native rhizobia community with an exotic legume in both responses, with a proposal of equality of results or superior to the alternative treatments of nitrogen and inoculation with recommended strains. Nodular natives were found in the symbiotic use area similar to natural treatments 1, isolated and identified as using the organic source or potentially rich in the use of the organic source for the recovery of degraded areas.