Effect of Azospirillum brasilense on yield components of maize

Autores

  • Vinícius Duarte Segismundo
  • Kevyn Belonssi de Oliveira
  • Jussara Barros Silva
  • Lucélia de Fátima Santos
  • Gustavo Vitti Moro Universidade Estadual Paulista Faculdade de Ciências Agrárias e Veterinárias Câmpus de Jaboticabal

DOI:

https://doi.org/10.15361/1984-5529.2020v48n4p351-356

Resumo

Among the countless operations involved in the maize production system, nitrogen fertilization is essential for the crop yield and development. However, due to the costs and negative environmental impacts caused by chemical fertilization, the use of the bacterium Azospirillum brasilense is an alternative to reduce costs and increase yield. Thus, this study evaluates the effect of inoculation of Azospirillum brasilense on the yield components of synthetic varieties of maize. The experiments were carried out at UNESP – Jaboticabal Campus, state of São Paulo, Brazil. The randomized block design was used with two replicates, testing forty-six maize genotypes: forty-four synthetic genotypes and two checks. Experiments were performed without nitrogen topdressing and with Azospirillum brasilense inoculation and, with nitrogen topdressing and without Azospirillum brasilense inoculation. Grain yield, average weight of grains, prolificacy, ear length, ear diameter, number of rows and number of grains per row were evaluated. The analysis of combined variance of experiments was performed considering the effects of genotypes, experiments, and the Genotype x Experiment interaction. Using the means from the analysis of variance, the Scott-Knott test was applied at 5% probability for the cases in which the F test was significant. It was found that bacterial inoculation increased yield, average weight of grains, ear diameter, and number of rows, while nitrogen fertilization increased prolificacy, ear length, and number of grains per row.

Biografia do Autor

Gustavo Vitti Moro, Universidade Estadual Paulista Faculdade de Ciências Agrárias e Veterinárias Câmpus de Jaboticabal

Possui graduação em Engenharia Agronômica pela Universidade de São Paulo (2005) e doutorado em Agronomia (Genética e Melhoramento de Plantas) pela Universidade de São Paulo (2011). Atualmente é Professor Assistente Doutor da Universidade Estadual Paulista Júlio de Mesquita Filho. Tem experiência na área de Agronomia, com ênfase em Melhoramento Vegetal, atuando principalmente nos seguintes temas: milho, qtls, seleção assistida, seleção genômica, seleção recorrente recíproca, mapeamento

Publicado

22/12/2020

Edição

Seção

Melhoramento Genético Vegetal - Plant Breeding