Avaliação de diferentes fontes de nitrogênio na cultura do (Zea mays L.)

• Autor(a) principal: MACHADO, Raphael Willian Bego
• Data de Publicação: 2021
• Outros Autores: CALVI, Vinicius de Oliveira
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Digital Unicesumar
• Texto Completo: http://rdu.unicesumar.edu.br/handle/123456789/7413
• topic: Adubação foliar; Azospirillum brasilense; Bacillus subtilis; Inoculação; CNPQ::CIENCIAS AGRARIAS::AGRONOMIA

Reducing the use of mineral fertilizers and environmental pollution during agricultural production is a growing need, as is the improvement of techniques for growing corn, a grass of great social and environmental importance. To this end, studies that lead to increased productivity with reduced production costs and impacts on the environment are essential. In this way, the objective was to evaluate different sources of nitrogen for the cultivation of corn in the region of Doutor Camargo-PR, thus reducing the dependence of production on chemical fertilizers and assisting in the regional agricultural sustainability. The following treatments were evaluated: T1 - Witness; T2 –50 kg.ha¹ of N in coverage; T3 – Azospirillum brasilense via leaf; T4 - Application of Bacillus subtilis via leaf; T5 - Azospirillum brasilense and Bacillus subtilis via leaf. The evaluated parameters were: plant height; grain yield; thousand grain mass and economic valuation. The data obtained were submitted to the F test, when significant to the means, they were compared by the Scott-Knott Test, at 5% probability, using the Sisvar software. The application of Bacillus subtilis via leaf provided significantly increased plant height and greater economic return for the producer in relation to the other treatments analyzed, while the application of this bacterium associated with Azospirillum brasilense did not provide benefits in relation to the control. Thus, it is concluded that the use of Bacillus subtilis is a profitable alternative to the rural producer and provides a more sustainable production system, reducing the need for chemical fertilization to make nitrogen available.