| Texto completo | |
| Autor(es): |
Machado, Bianca de Almeida
;
Feresin Gomes, Marcos Henrique
;
de Almeida, Eduardo
;
Otto, Rafael
;
Kamogawa, Marcos Yassuo
;
Pereira de Carvalho, Hudson Wallace
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | SN APPLIED SCIENCES; v. 2, n. 11, p. 12-pg., 2020-10-17. |
| Resumo | |
The spraying of tank mixtures with manganese (Mn) and glyphosate is a practical alternative to alleviate nutritional deficiency while controlling weeds. Thereby, this study investigates the chemical interactions between glyphosate and commercial sources of Mn, such as MnSO4, Mn-phosphite, Mn-EDTA, Mn-glycine, and MnCO3. Nearly 30% of the Mn supplied as MnSO4 and Mn-glycine precipitated with glyphosate, yielding a Mn:glyphosate solid complex with molar ratio of nearly 2:1, both presenting similar chemical environment. XANES analysis of the supernatants indicate no formation of Mn-glyphosate soluble complexes. The use of Mn-EDTA as well as the maintenance of the mixture pH below 2.5 prevented precipitation, while pH above 7 caused the formation of MnO(OH). In conclusion, the Mn source and the pH of the mixtures matter. The absence of Mn-glyphosate soluble complexes suggests that dissolved Mn and glyphosate are still able to accomplish their functions, however, the precipitation significantly decreases their active availability. (AU) | |
| Processo FAPESP: | 15/05942-0 - Investigação do metabolismo de nanomateriais absorvidos por plantas empregando-se espectroscopias vibracional e de Raios X |
| Beneficiário: | Hudson Wallace Pereira de Carvalho |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |
| Processo FAPESP: | 18/13401-7 - Espectroscopia de raio-X revelando os efeitos do glifosato sobre a absorção foliar de manganês em soja |
| Beneficiário: | Bianca de Almeida Machado |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |