Morphoagronomic and productive traits of RR soybean due to inoculation via Azospirillum brasilense groove

Abstract

In the last decades, the Brazilian soy productive chain has passed through a transformation process in which the yield, efficiency, profitability, economic and environmental sustainability are very important issues. In this context, the introduction of microorganisms has provided an increase in grains yield. The objective of this study was to evaluate the inoculation of Azospirillum brasilense associated with Bradyrhizobium japonicum in agronomic traits and the soybean productivity. The experiment was conducted in randomized blocks in 4 × 2 factorial, with four cultivars (Anta 82 RR ® , BRS Favorita RR ® , BRS 780 RR ® , BRS 820 RR ® ) and two treatments with A. brasilense (inoculated and non-inoculated) with three replications in two growing seasons. The following traits were evaluated: plant height, shoot dry biomass, chlorophyll content, leaf nitrogen content at flowering; and at harvest, the plant height, the insertion of the first pod, number of pods per plant, number of grains per pod, thousand-grain weight , grain yield, and grain harvest index were evaluated. There was a significant effect of growing seasons and cultivars in an isolated way and their interaction in most traits. The conditions in which the study was conducted, with or without inoculation of A. brasilense associated with B. japonicum do not affect the agronomic traits and grain yield in RR ® soybean cultivars.

Co-inoculation with Azospirillum brasilense in soybean cultivars subjected to water déficit

“…This demonstrates that, under this condition, the presence of Azospirillum brasilense did not interfere with this trait. These results corroborate the studies by Braccini et al (2016) and Zuffo et al (2016), who worked with the application of Azospirillum brasilense and Bradyrhizobium japonicum in soybean and found no difference in the mean yield between inoculated and co-inoculated treatments.…”

Multivariate Approach in the Initial Development of Soybean as a Function of Co-inoculation and Micronutrients

“…The multivariate analysis techniques are important tools for this type of study and have been widely used for the genetic analysis of the relationship between traits and existing genetic material (Iqbal et al, 2008). It is also noteworthy the need for research regarding the co-inoculation practice that has been recently confirmed as agronomical efficient in Brazil but the results in the literature still vary greatly (Gitti et al, 2012;Hungria et al, 2013;Zuffo et al, 2015;Zuffo et al, 2016).…”