Dissertação
Fontes de nitrogênio associadas a Azospirillum brasilense: impacto sobre crescimento e produtividade de trigo e milho
Fecha
2020-03-13Autor
Brondani, Marcelo Stefanello
Institución
Resumen
Nitrogen fertilization in wheat and corn crops has the greatest impact on production
costs in the fertilization item, due to their importance and need for these cultures. In
this way, poultry litter and nitrogen-fixing bacteria can be alternative management
strategies to supply nitrogen demand, however, the use of these strategies in isolation
or associated with mineral fertilization is still little studied. Therefore, the objective of
this work was to evaluate the impact of the bacterium A. brasilense associated with the
brood of birds and mineral fertilization in some vegetal parameters and in the final
productivity of grains of wheat and corn. The experimental design used was
randomized blocks, with 8 treatments and 8 repetitions, they being like this constituted:
T1 - Control, T2 - A. brasilense, T3 - 100% N-mineral, T4 - 100% N -mineral + A.
brasilense, T5 - 50% N-mineral + 50% N-organic, T6 - 50% N-mineral + 50% N-organic
+ A. brasilense, T7 - 100% N-organic, T8 - 100 % N-organic + A. brasilense. For plant
parameters and final productivity of corn and wheat grains, the data obtained
demonstrate that the use of the bacterium A. brasilense was not efficient. Regarding
nitrogen sources, when used urea or poultry litter+urea higher productivity is observed
when compared to other treatments. Contrary to what was observed when using only
poultry litter, the association of this residue with urea can be an alternative to the
addition of nitrogen in these cultures.