Department of Agronomy, Federal University of Viçosa, 36570-900, Viçosa, MG, Brazil.
Department of Agronomy, Federal University of Viçosa, 36570-900, Viçosa, MG, Brazil.
Chemosphere. 2024 Jan;348:140725. doi: 10.1016/j.chemosphere.2023.140725. Epub 2023 Nov 15.
The objective of the study was to assess the phytoremediation potential in two remineralized soils contaminated with sulfentrazone. Two soil types were evaluated: Oxisol (clayey) and Inceptisol (sandy loam), in pots, with and without the incorporation of the rock powder, at rates of 0, 4, and 8 t ha. Following this, sulfentrazone was applied at rates of 200, 400, 600, and 800 g a. i. ha, in addition to the control treatment without herbicide application, followed by the sowing of Canavalia ensiformis (jack bean). Injury level (IL) was assessed at 42 days after emergence (DAE), and biometric evaluations of the phytoremediating species were conducted at 70 and 120 DAE in the Oxisol and Inceptisol, respectively, for the following variables: height (HT), diameter (DM), trifoliate leaf number (TN), leaf area (LA), above-ground dry biomass (DB), and root dry biomass (RDB). At the end of the phytoremediation experiment, the soils were analyzed using High-Performance Liquid Chromatography (HPLC) and with Sorghum bicolor (sorghum) as a bioindicator to verify the residue of sulfentrazone. IL and DB assessments of the bioindicator species were conducted at 21 DAE. In both soils, higher herbicide rates (600 and 800 g a. i. ha) resulted in greater IL and reduced HT, LA, DB, and RDB of the phytoremediating species. C. ensiformis reduced the sulfentrazone residues in the soils. Although it did not directly influence phytoremediation, the rock powder improved soil fertility. In conclusion, C. ensiformis has the potential for effective phytoremediation of soils contaminated with sulfentrazone, providing safety for cultivating sensitive crops and benefiting the environment.
本研究的目的是评估两种经再矿化处理的受磺草酮污染土壤的植物修复潜力。评估了两种土壤类型：Oxisol（粘壤土）和 Inceptisol（砂壤土），在盆中进行，分别在添加和不添加岩石粉的情况下，以 0、4 和 8 t ha 的比例添加，随后以 200、400、600 和 800 g a.i.ha 的比例添加磺草酮ha，除了不施除草剂的对照处理外，随后播种 Canavalia ensiformis（刀豆）。出苗后 42 天（DAE）评估损伤水平（IL），并在 Oxisol 和 Inceptisol 中分别在 70 和 120 DAE 时对植物修复物种进行生物计量评估，用于以下变量：高度（HT）、直径（DM）、三叶数（TN）、叶面积（LA）、地上干生物量（DB）和根干生物量（RDB）。在植物修复实验结束时，使用高效液相色谱法（HPLC）对土壤进行分析，并使用 Sorghum bicolor（高粱）作为生物指示剂验证磺草酮的残留量。在 21 DAE 时对生物指示剂物种进行 IL 和 DB 评估。在两种土壤中，较高的除草剂剂量（600 和 800 g a.i.ha）导致更高的 IL 和降低了植物修复物种的 HT、LA、DB 和 RDB。C. ensiformis 降低了土壤中的磺草酮残留量。虽然它没有直接影响植物修复，但岩石粉改善了土壤肥力。总之，C. ensiformis 具有有效修复受磺草酮污染土壤的潜力，为种植敏感作物提供了安全性，并有益于环境。
