Eficiência da Azospirillum brasilense combinada com doses de nitrogênio no desenvolvimento de plantas de milho

• Autor(a) principal: Repke, Rodrigo Alberto [UNESP]
• Data de Publicação: 2013
• Outros Autores: Cruz, Sihélio Júlio Silva [UNESP], Silva, Carlos Jorge da [UNESP], Figueiredo, Priscila Gonzales [UNESP], Bicudo, Silvio José [UNESP]
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.18512/1980-6477/rbms.v12n3p214-226; http://hdl.handle.net/11449/141168
• topic: Zea mays; Biological nitrogen fixation; Nitrogen fertilization; Zea mays; Fixação biológica de nitrogênio; Adubação nitrogenada

This study aimed to evaluate the effect of the use of diazotrophic bacterium Azospirillum brasilense inoculated to seeds in combination with nitrogen on the development of corn plants. The experiment was carried out in field using a randomized block design in a double factorial arrangement with four reapplications.. The factor 1: with and without the bacterium application in the seed; and factor 2: six nitrogen doses: 0, 80, 105, 130, 155 and 180 kg ha-1. The trangenic maize hybrid 2B587 Hx was used. The morphological evaluations of plant and ear were done at 20, 40, 60, 80 and 100 days after emergence (DAE). Grain yield was measured at 115 DAE. The application of diazotrophic bacterium Azospirillum brasilense solution via the seeds, with or without synthetic nitrogen did not interfere with plant development and yield of maize. The adoption of this practice does not replace the use of nitrogen fertilizers nor allows dose reduction. The addition of nitrogen fertilizers promotes greater plant growth and increased productivity.