| _version_ | 1866901247947177984 |
|---|---|
| author | Douibi, Marwa Carpio,, María José Rodríguez-Cruz, M. Sonia Sánchez-Martín, María J. Marín-Benito, Jesús M. |
| author_facet | Douibi, Marwa Carpio,, María José Rodríguez-Cruz, M. Sonia Sánchez-Martín, María J. Marín-Benito, Jesús M. |
| contents | <p>The effects of mulch on the dissipation of S-metolachlor-SMOC, foramsulfuron-FORAM,<br>and thiencarbazone-methyl-TCM and the formation of their main degradation metabolites were<br>studied here. The herbicides were jointly applied in preemergence of maize on two separate occasions<br>to two agricultural soils under conventional tillage (CT) and non-tillage (NT) over two wheat-maize<br>cycles. Herbicide concentrations were determined in topsoil samples at different times after both<br>applications, and they were fitted to kinetic models. The half-life (DT50) values for SMOC were<br>higher under CT management than under NT (mean values: 25.6 and 7.38 days, respectively) in<br>both soils over the two years. The faster herbicide dissipation with mulch could be because it is<br>partially intercepted and strongly adsorbed/retained through different potential pathways, especially<br>biodegradation, which was supported by the detection of SMOC-ESA and SMOC-OA metabolites.<br>The mean DT50 values for FORAM (6.15 and 6.07 days, respectively) were very close for both soils<br>under NT and CT management over the two-year experiment. The mulch had a lesser impact than<br>for SMOC due to the former’s higher water solubility and lower adsorption, with dissipation being<br>controlled mainly by biodegradation and likely also by leaching. TCM recorded intermediate DT50<br>values (mean value 20.8 days) in both soils+CT in the two-year experiment compared to SMOC<br>and FORAM. The mulch effect on TCM dissipation was observed only after the second application<br>because the DT50 values were higher in soils+NT after the first application (mean value: 26.9 days)<br>than after the second one (mean value: 5.9 days). The amount of soil surface covered by the mulch<br>controlled the herbicide dissipation, and soil and herbicide properties determine their adsorption<br>behaviour by both mulch and soils.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_3390_agronomy14102284 |
| institution | Zenodo |
| language | eng |
| publishDate | 2024 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Control of the Field Herbicide Dissipation by Cover Crop Mulch in Conservation Agriculture Douibi, Marwa Carpio,, María José Rodríguez-Cruz, M. Sonia Sánchez-Martín, María J. Marín-Benito, Jesús M. <p>The effects of mulch on the dissipation of S-metolachlor-SMOC, foramsulfuron-FORAM,<br>and thiencarbazone-methyl-TCM and the formation of their main degradation metabolites were<br>studied here. The herbicides were jointly applied in preemergence of maize on two separate occasions<br>to two agricultural soils under conventional tillage (CT) and non-tillage (NT) over two wheat-maize<br>cycles. Herbicide concentrations were determined in topsoil samples at different times after both<br>applications, and they were fitted to kinetic models. The half-life (DT50) values for SMOC were<br>higher under CT management than under NT (mean values: 25.6 and 7.38 days, respectively) in<br>both soils over the two years. The faster herbicide dissipation with mulch could be because it is<br>partially intercepted and strongly adsorbed/retained through different potential pathways, especially<br>biodegradation, which was supported by the detection of SMOC-ESA and SMOC-OA metabolites.<br>The mean DT50 values for FORAM (6.15 and 6.07 days, respectively) were very close for both soils<br>under NT and CT management over the two-year experiment. The mulch had a lesser impact than<br>for SMOC due to the former’s higher water solubility and lower adsorption, with dissipation being<br>controlled mainly by biodegradation and likely also by leaching. TCM recorded intermediate DT50<br>values (mean value 20.8 days) in both soils+CT in the two-year experiment compared to SMOC<br>and FORAM. The mulch effect on TCM dissipation was observed only after the second application<br>because the DT50 values were higher in soils+NT after the first application (mean value: 26.9 days)<br>than after the second one (mean value: 5.9 days). The amount of soil surface covered by the mulch<br>controlled the herbicide dissipation, and soil and herbicide properties determine their adsorption<br>behaviour by both mulch and soils.</p> |
| title | Control of the Field Herbicide Dissipation by Cover Crop Mulch in Conservation Agriculture |
| url | https://doi.org/10.3390/agronomy14102284 |