Data/hora: 27/05/2024 16:59:17

Biblioteca(s): | Embrapa Agrobiologia.
Data corrente: | 15/06/2022
Data da última atualização: | 15/06/2022
Autoria: | OBANDO, M.; ANTONELLI, C.; CASANAVE, S.; MAGUIRE, V.; TORRES, D.; PÉREZ, G.; BAILLERES, M.; FLORENCIA, D.; CREUS, C.; VIDELA, C.; PUENTE, M.; ZILLI, J. E.; ALVES, B. J. R.; RUIZ, O.; EULOGIO, B.; CASSÁN, F.
Afiliação: | MELISSA OBANDO, Universidad Nacional de Río Cuarto, Córdoba, Argentina; ANTONELLI CRISTIAN, INTA, AR; SHEILA CASANAVE, INTA, AR; VANINA MAGUIRE, INTA, AR; DANIELA TORRES, Universidad Nacional de Río Cuarto, AR; GABRIELA PÉREZ, INTA, AR; MATÍAS BAILLERES, INTA, AR; FLORENCIA DONADÍO, Universidad Nacional de Río Cuarto, Córdoba, Argentina; CECILIA CREUS, INTA, AR; CECILIA VIDELA, INTA, AR; MARIANA PUENTE, INTA, AR; JERRI EDSON ZILLI, CNPAB; BRUNO JOSE RODRIGUES ALVES, CNPAB; OSCAR RUIZ, UNSAM-CONICET, Buenos Aires, Argentina; EULOGIO BEDMAR, Estación Experimental del Zaidín-CSIC, Granada, Spain; FABRICIO CASSÁN, Universidad Nacional de Río Cuarto, Córdoba, Argentina.
Título: | Evaluation of nitrous oxide emission by soybean inoculated with Bradyrhizobium strains commonly used as inoculants in South America.
Ano de publicação: | 2022
Fonte/Imprenta: | Plant and Soil, v. 472, p. 311?328. 2022.
ISSN: | 0032-079X
DOI: | https://doi.org/10.1007/s11104-021-05242-y
Idioma: | Inglês
Conteúdo: | Aims: The purpose of this work was to analyze the agronomic and environmental performance of soybean plants inoculated with the Bradyrhizobium strains widely used as soybean biofertilizers in South America and to determine if these strains possess any functional or taxonomic trait associated with the N2O emission. Methods: Bradyrhizobium japonicum E109 and CPAC 15, B. diazoefficiens USDA 110 and CPAC 7, and B. elkanii SEMIA 5019 and SEMIA 587 were used to inoculate soybean seeds. The field experiment was carried out in a soil without history of soybean cultivation in the Argentinian Humid Pampa. The natural 15N abundance method was applied to estimate N2-fixation, and N2O production was evaluated using gas chromatography. Among other physiological parameters, shoot dry weight, shoot N content, and crop yield were estimated after harvest. Results: B. japonicum inoculation produced the greatest increases in soybean growth and crop yield but also led to higher N2O emissions compared to all other inoculated treatments. Plants inoculated with B. diazoefficiens released the lowest amount of N2O, and their growth and yield were the least affected. Inoculation with B. elkanii resulted in intermediate N2O emission fluxes and crop yield compared with B. japonicum and B. diazoefficiens. Conclusions: We found that soybean inoculation with strains of B. japonicum and B. elkanii that lack the nosZ gene led to the highest N2O emissions under field conditions, but also to the highest crop yield, while inoculation with strains that carry out complete denitrification, nosZ-containing B. diazoefficiens, showed lower N2O emission and lower crop yield.
Palavras-Chave: | Bioproducts; Rhizobia; Soybean crop.
Thesaurus Nal: | Denitrification; Greenhouse gas emissions.
Categoria do assunto: | S Ciências Biológicas
Registro original: | Embrapa Agrobiologia (CNPAB)
Exemplares: | CNPAB - (41931-1) - UPC - AP - DD -  -  -  - DIS