Navegando por Autor "Paludetto, Alexandre"

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    Inoculação com Rhizobium tropici e coinoculação com Azospirillum brasilienses na eficiência nutricional e produtiva do feijão (Phaseolus vulgaris)
    (Universidade Estadual do Norte do Paraná, 2022) Paludetto, Alexandre; Kolln, Oriel Tiago; https://orcid.org/0000-0002-8507-9808; http://lattes.cnpq.br/8041626078120100; Kolln, Oriel Tiago; https://orcid.org/0000-0002-8507-9808; http://lattes.cnpq.br/8041626078120100; Bellettini, Silvestre; https://orcid.org/0000-0001-6769-544X; http://lattes.cnpq.br/0540747739983343; Umburanas, Renan Caldas; https://orcid.org/0000-0002-4112-3598; http://lattes.cnpq.br/6449755247106523
    The bean crop (Phaseolus vulgaris) is important in the national agricultural and socioeconomic scenario, represents an important source of protein for human consumption and makes up the plate of millions of Brazilians. Thus, improving the productivity of this crop must always be a strategy for regional development and food security. The objective of this work was to evaluate the productive potential and the nutritional efficiency of the common bean and black bean crop in the pioneer north region of Paraná, quantifying the inoculation response associated with coinoculation and topdressing nitrogen fertilization. The experiment was carried out in an area installed at the Luiz Natal Bonin Experimental Station - IAPAR in the city of Cambará/PR. Five treatments and two subtypes of bean were used with 4 replications: T1: No N and no inoculation; T2: without inoculant with N fertilizer in topdressing; T3: Rhizobium tropici inoculant via seed; T4: Rhizobium tropici inoculant via seed + co-inoculation with Azospirillum brasilense via seed; T5: Inoculant with Azospirillum brasilense via seed. Sowing fertilization in all treatments was 50 kg ha⁻¹ of P2O5 and 50 kg ha⁻¹ of K2O. In T2, 30 kg ha⁻¹ of N in the form of ammonium sulfate was used. Evaluations were carried out along the cycle, to evaluate the nodulation, and the morphology of the plants. At the end of the cycle, the production components, shoot dry mass, N accumulation, productivity and N use efficiency were also evaluated. There was a significant interaction between bean subtypes and treatments only for the diameter of the collar of the plants. Inoculation, co-inoculation or N in coverage did not improve the biometric parameters of the culture, the accumulation of plant dry mass and the weight of a thousand seeds. The non-inoculated treatments showed the native presence of Rhizobia, which contributed to the control performance. The average harvest index obtained in the experiment was 0.42%. The T4 had a productivity 33% higher than the control, but the isolated inoculations produced the same as the control and the N application in topdressing. The nitrogen use efficiency (NUE), and the N absorption efficiency (NAE) weren't influenced by the treatments and bean subtypes, consequently, the gains of yield the T4 treatment, which was two microorganisms application, are associated with the effect of growth promotion. The total extraction of nutrients considering shoot, root and grains, we obtained the following average extraction order between treatments N > K > Ca > Mg > P > S with values respectively of 149.1; 106.8; 67.7; 16.0; 13.2 and 11.9 kg ha⁻¹. Inoculation + co-inoculation increased productivity, and further studies should be carried out to test the environmental interaction with these microorganisms.