Crescimento radicular e nodulação do feijoeiro sob inoculação e uso de cobalto e molibdênio

Abstract

The common bean (Phaseolus vulgaris L) is one of the most cultivated species in the world, with Brazil being one of the largest producers and consumers of this legume. The crop is demanding in many nutrients, nitrogen being the most limiting factor of productivity in agricultural areas. This demand can be met through the inoculant associated with the use of cobalt and molybdenum in the seeds. Thus, the objective of this work was to evaluate the inoculation of Rhizobium tropici and the use of cobalt and molybdenum in common bean. The experiment was carried out in the experimental area of UFFS – Campus Cerro Largo – RS, in a completely randomized design with five replications. The treatments were without the use of seed inoculation and without the use of cobalt and molybdenum in the seeds, with the use of inoculation in the seeds and without the use of cobalt and molybdenum in the seeds, without the use of inoculation in the seeds and with the use of cobalt and molybdenum in the seeds, with the use of inoculation in the seeds and with the use of cobalt and molybdenum in the seeds, in rhizoboxes and conducted until the phenological stage V3. The results were submitted to analysis of variance (ANOVA), and the averages were compared using the Tukey test at 5% significance, using the SISVAR statistical program. There were no interactions between plant height, stem diameter and shoot and root dry mass with the use of inoculant and cobalt and molybdenum. The number of nodules, which presented only the inoculation showed the best results in the nodulation of the common bean plant. The use of cobalt and molybdenum plus inoculant showed higher root surface area, root diameter and root volume.