Animal bonechar increases sorption and decreases leaching potential of aminocyclopyrachlor and mesotrione in a tropical soil

Autor(es)

Mendes, Kassio Ferreira ^[1] ; Hall, Kathleen E. ^[2] ; Takeshita, Vanessa ^[1] ; Rossi, Monica Lanzoni ^[1] ; Tornisielo, Valdemar Luiz ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Ctr Nucl Energy Agr, Ave Centenario 303, BR-13400970 Sao Paulo - Brazil

^[2] Univ Minnesota, Dept Soil Water & Climate, Minneapolis, MN 55455 - USA

• Tipo de documento: Artigo Científico
• Fonte: Geoderma; v. 316, p. 11-18, APR 15 2018.
• Citações Web of Science: 6

Resumo

While previous studies have shown the influence of various biochars on the fate and transport of herbicides in soil, little information exists on the effects of bonechar. The aim of this research was to evaluate the effect of cow bonechar amendments on the sorption-desorption and leaching of aminocyclopyrachlor and mesotrione in a tropical soil. Soil was amended with bonechar at rates of 0 (control), 1, 5, 10, and 100% (pure bonechar) (w w(-1)), corresponding to 0, 12, 60, 120, and 1200 t ha(-1), respectively. Additionally, two bonechar particle size groups were compared (0.3-0.6 and 0.15-0.3 mm). Aminocyclopyrachlor (pyrimidine-2-C-14-aminocyclopyrachlor) and mesotrione (cyclohexane-2-C-14-mesotrione) sorption-desorption was evaluated using the batch equilibrium method and column leaching studies. Higher bonechar application rates increased the sorption of both herbicides. Aminocyclopyrachlor and mesotrione were leachable in the control soil, but the addition of bonechar reduced the depth at which both herbicides were detected. Bonechar additions to soil, regardless of the particle size, was able to statistically increase sorption, decrease desorption, and reduce the leaching potential of both herbicides in the soil. (AU)

• Processo FAPESP: 16/17683-1 - Efeito do biochar e hidrochar na capacidade de reduzir a biodisponibilidade de herbicidas e metabólitos em solos
• Beneficiário: Kassio Ferreira Mendes
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado