Abstract

The application of glyphosate to coffee crops can cause injuries to plants. Fertiactyl^® foliar fertilizer reduces injuries when mixed with glyphosate; however, it is important to establish which mechanisms are responsible for this protective action. This study aimed to evaluate the absorption and translocation of glyphosate applied separately and in mixture with Fertiactyl^® in coffee seedlings. Absorption and translocation were performed with ¹⁴C-glyphosate applied separately and in mixture with Fertiactyl^® at 0, 6, 12, 24, 48, 96, and 144 hours after application (HAA). Most of the ¹⁴C-glyphosate applied to coffee seedlings was not absorbed. The ¹⁴C-glyphosate applied separately had a higher absorption by coffee seedlings (6.5%) than in a mixture with Fertiactyl^® (2.7%) at 144 HAA. The maximum translocation of the ¹⁴C-glyphosate applied separately was 0.69% at 81.2 HAA and in mixture with Fertiactyl^® was 0.41% at 41.2 HAA. The treated leaves retained a higher percentage of ¹⁴C-glyphosate when applied separately (5.6% at 144 HAA) than in a mixture with Fertiactyl^® (2.2% at 144 HAA). Low translocation (<1%) for the rest of the plant shoots was observed both for the ¹⁴C-glyphosate applied separately and in combination with Fertiactyl^®. Therefore, Fertiactyl^® decreased the absorption and translocation of ¹⁴C-glyphosate in coffee seedlings.

 抽象的

将草甘膦施用于咖啡作物可能会对植物造成伤害。 Fertiactyl ^®叶面肥与草甘膦混合可减少伤害；然而，重要的是确定哪些机制负责这种保护行动。本研究旨在评估单独施用以及与 Fertiactyl ^®混合施用的草甘膦在咖啡幼苗中的吸收和转运情况。在施用后0、6、12、24、48、96和144小时（HAA），分别施用¹⁴ C-草甘膦以及与Fertiactyl ^®混合时进行吸收和移位。施用于咖啡幼苗的¹⁴ C-草甘膦大部分未被吸收。单独施用的¹⁴ C-草甘膦在 144 HAA 下的咖啡幼苗吸收率 (6.5%) 高于与 Fertiactyl ^®的混合物 (2.7%)。单独施用的¹⁴ C-草甘膦在 81.2 HAA 时的最大易位为 0.69%，与 Fertiactyl ^®混合时在 41.2 HAA 时的最大易位为 0.41%。单独施用时，经处理的叶子保留了更高百分比的¹⁴ C-草甘膦（144 HAA 时为 5.6%），而与 Fertiactyl ^®混合施用时（144 HAA 时为 2.2%）。低易位（<1 id=118> 14 C-草甘膦单独施用或与 Fertiactyl ^®组合施用。因此，Fertiactyl ^®降低了咖啡幼苗中¹⁴ C-草甘膦的吸收和易位。