Foliar application of Azospirillum brasilense and nitrogen

Claudinei Kappes, Rayane Gabriel da Silva, Vinícius Eduardo Nunes Ferreira

Resumo

The aim of this study was to evaluate the agronomic performance of maize off-season under foliar application of Azospirillum brasilense and N rates. The research was conducted at the Experimental Station of the MT Foundation (17º 09' S, 54º 45' W and altitude of 490 m) in Itiquira, Mato Grosso State, Brazil, in the off-season of 2013, on a clayey Rhodic Haplustox. The experimental design was in randomized blocks with treatments in a 2 x 5 factorial arrangement (with and without the application of A. brasilense x application of N rates: 0, 30, 60, 90 and 120 kg ha-1, as urea). The applications of inoculant and N were done in the V5 stage. The sowing of hybrid Dow 2B587 Hx was held on 02/22/2013. Final plant population, prolificacy, stem diameter, plant height, thousand grain weight and grain yield were measured. The data were analyzed using the F test and regression equations were adjusted for N rates. The application of A. brasilense did not influence positively the maize performance. The increase in N rates resulted in a linear increase in the stem diameter and grain yield.

Palavras-chave

adubação nitrogenada, fixação biológica, produtividade de grãos, Zea mays.

Texto completo:

PDF