| Texto completo | |
| Autor(es): |
Pereira, Natalia Salmazo
;
Munhoz-Garcia, Gustavo Vinicios
;
Takeshita, Vanessa
;
Pimpinato, Rodrigo Floriano
;
Tornisielo, Valdemar Luiz
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ARCHIVES OF AGRONOMY AND SOIL SCIENCE; v. N/A, p. 16-pg., 2022-08-03. |
| Resumo | |
Non-ionic herbicides, such as propisochlor, are more easily retained in organic soil fractions. The presence of straw in tropical cropping systems can affect herbicide transposition to the underlying seed banks and their environmental behavior. The aim of this study was to evaluate propisochlor soil retention in the presence of soybean and sugarcane straw (0, 5 and 10 t ha(-1)) through radiometric techniques. Most of the applied C-14-propisochlor was retained in the soil profile (18.2-39.4%) following an extreme rainfall simulation in the presence of straw. Decreased herbicide leaching was observed in the presence of sugarcane and soybean straw (0.7-0.5%), compared with soil without straw (1.8%). Hysteresis values ranged from 0.8 to 1.0, indicating that propisochlor sorption was reversible allowing for soil seed bank effects, as well as environmental dissipation. These findings indicate that propisochlor can overcome straw barriers, although representing low groundwater contamination risks. Because of this, reduced environmental impacts following the application of this herbicide are noted for tropical cropping systems containing straw mulch. (AU) | |
| Processo FAPESP: | 20/12644-3 - Comportamento de herbicidas pré-emergentes em palhadas de diferentes plantas de cobertura |
| Beneficiário: | Gustavo Vinícios Munhoz Garcia |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |
| Processo FAPESP: | 19/04758-1 - Nanopartículas como sistema carreador de herbicidas aplicados em pré-emergência em solos oriundos de sistema de plantio direto e convencional |
| Beneficiário: | Vanessa Takeshita |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |