Adubação nitrogenada na cultura do milho : aspectos importantes e associação com substâncias biológicas

Abstract

Corn is a crop widely used around the world due to its numerous uses, both for food and as a raw material for energy production. A chemical element that tends to be a limiting factor for the development of this crop is nitrogen, as it is of fundamental importance in protein metabolism and chlorophyll production. Corn does not perform atmospheric nitrogen fixation like the soybean crop, so it is necessary to carry out fertilization with chemical formulas that meet the crop's demand for this nutrient. Some studies have been carried out in order to observe the efficiency of nitrogen-fixing bacteria in symbiosis with the corn crop. Azospirillum brasiliense is one of the bacteria with the greatest potential for this association. In view of this, the objective of the present work was to carry out a review with demonstration of the results of studies carried out about the association of nitrogen doses with A. brasiliense, in order to obtain increases in the corn crop. Grande parte dos trabalhos encontrados apontam para sutis incrementos na produtividade da cultura quando associadas doses de nitrogênio parceladas com a bactéria assimiladora de nitrogênio, sendo essa uma possível alternativa para melhoria na qualidade biológica do solo.