The performance of bean pod lineage inoculated with Gluconacetobacter diazotrophicus PAL5

Abstract

The bean pod culture requires fertilizer application to improve its yield; therefore, the aim of the present study is to evaluate the performance of bean pod lineage inoculated with Gluconacetobacter diazotrophicus PAL5. Between 2016 and 2017, six snap bean lineages provided by Darcy Ribeiro North Fluminense State University were evaluated in greenhouse based on a completely randomized block design, in 6 × 2 × 2 × 2 factorial arrangement, with four repetitions. Analysis of variance and lineage selection were performed. based on results recorded for variables ‘flowering’ ‘pod production date’ ‘pod length’ ‘pod width’ ‘pod total’ ‘pod yield’ ‘grain yield’ and ‘100-grain weight, the best performances were achieved when the GT biplot method was applied. The analysis of variance showed different performances depending on the lineage, bacterium and fertilizer, as well as on lineages x bacterium, lineages x fertilizer, and bacterium x fertilizer interactions. Biplot graphs depicted efficient lineage selection, since it showed 75.92% of the total variation observed in the first two main components. The best performance recorded for all biplot groups concerned the inoculation with G. diazotrophicus PAL5, without fertilizer application. Lineage UENF 7-6-1 was the ideal performances depending on the lineage when it was inoculated with this bacterium, although G. diazotrophicus PAL5 lost its efficiency after NPK (fertilizer) application.