Título:	Effects of sorgoleone on soil microbial communities and soybean nodulation.
Autor:	MEDEIROS, L. B. de SILVA, M. E. B. R. COSTA, G. D. da PEREIRA, C. D. MATOS, F. S. SANTOS, T. E. B. dos
Afiliación:	LAIANE BARBOSA DE MEDEIROS, UNIVERSIDADE DE BRASÍLIA; MARIA EDUARDA BORGES RODRIGUES SILVA, UNIVERSIDADE ESTADUAL DE GOIÁS; GABRIEL DUARTE DA COSTA, UNIVERSIDADE ESTADUAL DE GOIÁS; CICERO DONIZETE PEREIRA, CPAC; FÁBIO SANTOS MATOS, UNIVERSIDADE ESTADUAL DE GOIÁS; TALLES EDUARDO BORGES DOS SANTOS, UNIVERSIDADE ESTADUAL DE GOIÁS.
Año:	2025
Referencia:	Journal of Sustainable Development, v. 18, n. 5, p. 143-151, 2025.
Descripción:	ABSTRACT - Bioinputs offer a promising alternative to synthetic herbicides, reducing environmental impacts, but their effects on soil microbial communities are not well understood. This study assessed the effects of aqueous sorghum extract on soil microbial communities and nodulation in soybean cultivated on sorghum and maize crop residues. The experiment was conducted in a completely randomized split-plot design with five replications, with sorghum or maize crop residues in the plots, and weed control with or without aqueous sorghum extract application in the subplots. Microbial biomass carbon (MBC), basal soil respiration (BSR), microbial quotient (qMIC), metabolic quotient (qCO2), mycorrhizal colonization, and number of viable nodules were measured. Aqueous sorghum extract application reduced MBC (77.92 mg C kg⁻¹ soil) and BSR (40.58 mg C-CO2 kg⁻¹ soil day⁻¹) under sorghum residue treatments, increased qCO2 (indicating higher microbial stress), and reduced qMIC, suggesting lower carbon use efficiency. Soybean mycorrhizal colonization was unaffected, but nodulation was significantly reduced under sorghum residue treatments (37 viable nodules per plant), suggesting an inhibitory effect on soybeanrhizobium symbiosis. These findings indicate that phenolic compounds and quinones in sorghum alter soil microbial activity and impair biological nitrogen fixation, particularly when combined with sorghum crop residues.
Thesagro:	Alelopatia Fixação de Nitrogênio Herbicida Nodulação Soja
NAL Thesaurus:	Allelopathy Herbicides Nitrogen fixation Nodulation Sorgoleones Soybeans
ISSN:	1913-9071
DOI:	https://doi.org/10.5539/jsd.v18n5p143
Notas:	Online Published: September 21, 2025.
Tipo de Material:	Artigo de periódico
Acceso:	openAccess
Aparece en las colecciones:	Artigo em periódico indexado (CPAC)