Feasibility of transference of inoculation-related technologies: A case study of evaluation of soybean rhizobial strains under the agro-climatic conditions of Brazil and Mozambique

Abstract

HighlightsSoybean N demand can be fulfilled by biological nitrogen fixation (BNF).Bradyrhizobium strains from Brazil and USA were tested in Brazil and Mozambique.Inoculation resulted in grain yield gains of 4–5% in Brazil and 20–29% in Mozambique.Transference of BNF technologies is feasible, speeding up the production system.Exotic soybean Bradyrhizobium strains can highly benefit soybean in Mozambique.

Indigenous rhizobia strains: The silver bullet for enhanced biological nitrogen fixation and soybean (Glycine max (L.) Merr. ) yield under different soil conditions in South Kivu province, Democratic Republic of Congo

“…This study also revealed differences among strains in both nodulation and shoot dry weight improvement which is primarily due to their genetic differences. Other studies conducted in Africa have similarly reported consistent variation in symbiotic effectiveness among indigenous rhizobia strains (Abaidoo et al, 2007;Chibeba et al, 2017Chibeba et al, , 2018 and consequently this study further contributes to the evidence that effective rhizobia do occur in African soils.…”

“…This is as a result of the native rhizobia being less effective (Osunde et al, 2003). The same observation has been made by Chibeba et al (2018) who observed that an appreciable proportion of rhizobia population in Mozambican soils was composed of ineffective rhizobia. The N+ control produced high shoot dry weight; this is mainly as a result of the mineral N being absorbed by the plant at early stages compared to the fixed N and thus improved vegetative formation (Saturno et al, 2017).…”

“…There was yield improvement with inoculated plots compare to the plots where N had been applied and N-control. The indigenous strains NAC46 and NAC17 increased yields by 1.7 and 1.6 fold respectively compared to the N+ control, 2.2 folds compared to the N-control and 1.4 and 1.3 fold compared to the commercial strain USDA110.These yield gains are within the 3.2-14.5% interval of inoculation yield benefit reported in Brazil (Hungria et al, 2006) and in Mozambique (Chibeba et al, 2018). This study has further confirmed the findings of Chibeba et al (2017Chibeba et al ( , 2018 and Hungria et al, (2005Hungria et al, ( , 2006 that BNF is the most efficient way of improving soybean productivity.…”

“…When differences between treatments were detected, Tukey test was used to compare means at p >0.05 level of significance. Relative effectiveness (RE) was determined by dividing the shoot dry weight of treatment over that of the N+ treatment, in the same block (Chibeba et al, 2018).…”

Effects of plant growth-promoting rhizobacteria on co-inoculation with Bradyrhizobium in soybean crop: a meta-analysis of studies from 1987 to 2018

“…It is important to emphasize that the meta-analysis for grain yield considered only data from field studies, in which the variables are difficult to control, such as the presence of native strains competing with the inoculant for nodulation. Furthermore, soybean responses to co-inoculation may vary according to plant genotype, bacterial strain, environmental conditions, as well as the quantity and quality of PGPR cells used as inoculants (Schmidt, Messmer & Wilbois, 2015;Pannecoucque et al, 2018;Chibeba et al, 2018). These variations in responses to co-inoculation were evident in the studies evaluated, which can be observed in the CI for different PGPR strains, in all the traits described.…”