Residual activity of sulfentrazone and its impacts on microbial activity and biomass of Brazilian Savanna soils

Authors

  • Virgínia Damin Universidade Federal de Goiás, Escola de Agronomia, Goiânia, GO, Brasil.
  • Bruno da Silva Carrijo Universidade Federal de Goiás, Escola de Agronomia, Goiânia, GO, Brasil. https://orcid.org/0000-0002-3340-041X
  • Nathalia Almeida Costa Universidade Federal de Goiás, Escola de Agronomia, Goiânia, GO, Brasil.

Abstract

Soil attributes may affect the residual activity and impacts of herbicides on non-target organisms. This study aimed to evaluate the residual activity of the sulfentrazone herbicide and its impacts on microbiological parameters of Brazilian Savanna soils, as well as to identify soil attributes that can be used to predict the residual activity of the herbicide in these soils. The experimental design was completely randomized, in a 6 x 5 factorial scheme, with 4 replications, being 5 soil types (Rhodic Acrustox; Typic Quartzpsamment; Rhodic Haplustox; Typic Humaquepts; Fluventic Dystrustepts) and 6 periods (0, 15, 30, 45, 60 and 90 days after herbicide application - DAA). The residual activity of the sulfentrazone herbicide is dependent of the soil type, and the time that the herbicide can control at least 80 % of Urochloa decumbens plants ranges from 0 (Typic Humaquepts) to 38 days (Rhodic Haplustox). The bases saturation is the only soil attribute correlated with the herbicide efficacy over time, in the Brazilian Savanna soils, showing a moderate correlation up to 90 DAA. The pH, organic matter and clay content are not correlated with the herbicide efficacy over time in these soils. Sulfentrazone reduces the microorganisms activity from 45 to 90 DAA in all the studied soils. However, it does not affect the microbial biomass carbon.

KEYWORDS: Urochloa decumbens Stapf., pre-emergent herbicides, soil microorganisms.

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Published

2021-11-22

How to Cite

DAMIN, V.; CARRIJO, B. da S.; COSTA, N. A. Residual activity of sulfentrazone and its impacts on microbial activity and biomass of Brazilian Savanna soils. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 51, p. e68340, 2021. Disponível em: https://revistas.ufg.br/pat/article/view/68340. Acesso em: 2 jan. 2025.

Issue

Vol. 51 (2021)

Section

Special Supplement: Cerrado [Brazilian Savanna]

License

Authors will not be paid for published articles and must waive their copyright in favor of the PAT journal. On the other hand, they are solely responsible for the content of those articles, even if the Editor holds the right to adjust them to the norms of the journal. Authors are allowed to publish their articles simultaneously in their institutional repositories, as soon as the original publication at the PAT journal is mentioned.