Uso de bioestimulantes, inoculantes, nitrogênio e suas combinações na nutrição do feijoeiro-comum (Phaseolus vulgaris l.)

Abstract

The common bean (Phaseolus vulgaris L.) plays an important role in the Brazilian economy and in the world's food supply due to its protein and nutritional richness. Like other agricultural crops, it faces challenges related to management and productivity. The increasing use of bioinputs and biofertilizers provides better nutritional balance to plants, in addition to reducing dependence on synthetic fertilizers. The experiment was conducted in a greenhouse at the Federal Technological University of Paraná UTFPRDV, Dois Vizinhos campus, using a Completely Randomized Experimental Design (CRD), with twelve treatments and six replicates (totaling 72 experimental units) divided into two collection moments. The treatments were biostimulants, inoculants (Rhizobium tropici SEMIA 4088 and Azospirillum brasilense with Pseudomonas fluorescens). The cultivar used was IPR Água. Two samples were taken at 35 and 60 days after planting, with evaluations of dry mass of the aerial part and root, fresh mass of the aerial part and root, length of the aerial part and root, root volume, number of total nodules and chlorophyll content. The mean comparison tests were performed with the RBIO software. In the first evaluation, significance was verified for the variables MSR and VR, which contained Biostimulant, Inoculant (Rhizobium tropici), N-mineral and their combinations. The second collection observed significant differences between the variables CPA and MSPA and VR. However, this length did not interfere significantly in nodulation and photosynthesis. Co-inoculation did not demonstrate significant difference from the control. Biostimulant + Inoculant (Rhizobium tropici SEMIA 4088) presented numerically greater number of nodules, than Rhizobium tropici bacteria isolated in the second evaluation.