Enhancing soybean yield through co-inoculation of Bradyrhizobium spp. and ammonium-excreting Azospirillum brasilense HM053

IF 3.9 2区农林科学 Q1 AGRONOMY

Plant and Soil Pub Date : 2025-02-28 DOI:10.1007/s11104-025-07330-9

S. C. Araujo, R. M. Etto, E. M. Souza, F. O. Pedrosa, F. Furmam-Cherobim, A. R. Bini, D. R. P. Gonçalves, E. Guerlinguer, P. C. Conceição, A. L. Braccini, D. C. V. Marteli, E. L. Souchie, I. M. B. Torneli, C. W. Galvão

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引用次数: 0

Abstract

Background and aims

The inoculation of Bradyrhizobium spp. in soybean is a widespread technology in Brazil and one of the most successful cases of plant-bacteria interaction once all the nitrogen required by the plant is provided through biological nitrogen fixation. Co-inoculation of Bradyrhizobium spp. with Azospirillum brasilense AbV5/AbV6 was recommended in Brazil in 2013, but its adoption by farmers has been limited due to variable yield gains. In the present work, we hypothesized that additional traits of A. brasilense, such as resistance to oxidative stress and ammonium excretion, further enhance its growth-promoting effects in soybean when co-inoculated.

Methods

Therefore, an oxidative resistant strain (IH1), two constitutive nitrogen fixing strains (HM053 and HM210) and the commercial strains (AbV5/AbV6) of A. brasilense were co-inoculated with Bradyrhizobium spp. in soybean. The experiments were carried out in four distinct soil and edaphoclimatic regions of Brazil to evaluate soybean nodulation, growth, and yield.

Results

The novel strains of A. brasilense enhanced soybean nodulation and grain yield. The co-inoculation with the HM053 strain resulted in the highest increase in soybean grain yield, ranging from 4.3% to 25.4%, or 151.7 to 878.1 kg/ha, compared to single inoculation.

Conclusion

This promising technology generates environmental and economic gains, since it promotes plant growth, increases yield and contributes for a sustainable agriculture.

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来源期刊

Plant and Soil 农林科学-农艺学

CiteScore

8.20

自引率

8.20%

发文量

543

审稿时长

2.5 months

期刊介绍： Plant and Soil publishes original papers and review articles exploring the interface of plant biology and soil sciences, and that enhance our mechanistic understanding of plant-soil interactions. We focus on the interface of plant biology and soil sciences, and seek those manuscripts with a strong mechanistic component which develop and test hypotheses aimed at understanding underlying mechanisms of plant-soil interactions. Manuscripts can include both fundamental and applied aspects of mineral nutrition, plant water relations, symbiotic and pathogenic plant-microbe interactions, root anatomy and morphology, soil biology, ecology, agrochemistry and agrophysics, as long as they are hypothesis-driven and enhance our mechanistic understanding. Articles including a major molecular or modelling component also fall within the scope of the journal. All contributions appear in the English language, with consistent spelling, using either American or British English.