The use of various strains of Rhizobium tropici for inoculation of snap bean cultivars with a determinate growth pattern

Abstract

The snap bean (Phaseolus vulgaris L.) is an economically important vegetable in Brazil. Bean plants can establish symbiotic associations with bacteria that fix atmospheric nitrogen. These associations show specificity of host plants to certain bacteria. Nitrogen fertilization constitutes a crop production cost, and the use of Rhizobium inoculation to supply nitrogen to crops may decrease the production costs. The aim of this study was to evaluate the effects of inoculation of three different snap bean cultivars with three Rhizobium tropici strains on agronomical performance of the plant. A completely randomized experimental design was used, with a 3 × 5 factorial scheme and four replicates per treatment. The factors tested were three snap bean cultivars (UEL 1, Alessa, and UEL 2), and five types of inoculation (uninoculated control, inoculation with SEMIA 4077, SEMIA 4080, SEMIA 4088, or with a mix of the three strains). The experiment was conducted in a greenhouse. Plant height, stem diameter, pod length, the number of pods per plant, and average weight and yield of commercial-grade pods, were determined. An analysis of variance was conducted using the F test, followed by Tukey's test (p < 0.05). Inoculation had a positive effect on all the parameters quantified. The beneficial effect was more pronounced in plants inoculated with the mix of Rhizobium strains. Key words: Inoculant. Nitrogen. Phaseolus vulgaris L. ResumoO feijão-vagem (Phaseolus vulgaris L.) é uma hortaliça destaque no mercado nacional. O feijoeiro tem a habilidade de associar-se simbioticamente com bactérias responsáveis pela fixação biológica do nitrogênio, sendo observada neste processo a especificidade entre genótipo e bactéria. A adubação nitrogenada constitui parte dos custos de produção, os quais podem ser reduzidos pelo uso da inoculação para fornecimento de N à cultura. O objetivo desse trabalho foi avaliar o desempenho agronômico de três genótipos de feijão-vagem inoculados com três estirpes de Rhizobium tropici. O delineamento experimental foi inteiramente casualizado com quatro repetições, conduzido em casa de vegetação, resultando em fatorial 3x5: três genótipos (UEL 1, Alessa e UEL 2) e cinco condições de inoculação (testemunha sem inoculação, SEMIA 4077, SEMIA 4080, SEMIA 4088 e a mistura dos três isolados). Foram avaliados altura da planta, diâmetro do colmo, comprimento de vagens, número de vagens por

Response of snap bean cultivars of determined growing to inoculation with Rhizobium tropici

“…In relation to plant height, these results corroborate in part with the work of Vaz et al (2017), in which it verified differences between the heights of tested bean cultivars and affirm that genotypes with greater vigor are desirable, promoting a better initial performance in the field. Although no inoculation effect was observed at plant height, Furlan et al (2016) observed that inoculation treatments promoted increments in height and diameter of snap beans, as well as improving other agronomic characteristics. Vieira et al (2010) found a similar result for the dry mass of aerial part (DMAP), with a difference between the accumulations of biomass among six Macassar bean cultivars, not observing a significant effect of DMAP increase as a function of inoculation.…”

“…Although the bean pod is considered to be of low efficiency in the BNF, Furlan et al (2016) obtained promising results when studying the effects of inoculation on the crop, being a viable alternative and less onerous to improve the yield of the pods of the bean pod. Therefore, it is indispensable to disseminate this very low-cost biotechnology, considering that biological nitrogen fixation is an ecological, economically advantageous and sustainable process (Chagas Junior, 2010).…”

Sources and rates of nitrogen on the nutrition and productive performance of determinate growth habit snap bean

“…Similarly, Brito et al (2011) concluded that N supply for common bean and cowpea followed the order: biological fixation, soil and, last, urea fertilizer, while Furlan et al (2016) reported beneficial effect of the use of various strains of Rhizobium tropici in determinate growth habit snap bean cultivars, allowing to partially replace the N fertilization. Table 1.…”

Glifosato, trinexapaque-etílico e cloreto de mepiquate no desempenho produtivo de feijão-vagem de crescimento determinado

“…E-mail: guilhermerenatogomes@hotmail.com; gustavo-freiria@hotmail.com; andreprechlak@gmail.com 2 Profª Drª, Departamento de Agronomia, UEL, Londrina, PR, Brasil. E-mail: sadayo@uel.br * Author for correspondence ARTICLES / ARTIGOS AGRONOMY / AGRONOMIA Introduction Bush snap beans (Phaseolus vulgaris L.) are distinct from dry beans; their pods are harvested while immature and consumed with little or no processing (FURLAN et al, 2016). It is an important part of olericulture for family farming in Brazil (ABCSEM, 2011), which generates about 170 million reais for producers, due to the commercialization of approximately 50 thousand tons of pods from cultivars of determinate and indeterminate growth (CONAB, 2015).…”