Phytoremediation of quinclorac and tebuthiuron-polluted soil by green manure plants. Issue 5 (16th April 2021)

• Record Type: Journal Article
• Authors: Mendes, Kassio Ferreira; Maset, Bruno Aguiar; Mielke, Kamila Cabral; Sousa, Rodrigo Nogueira de; Martins, Bianca Assis Barbosa; Tornisielo, Valdemar Luiz
• Is Part Of: International journal of phytoremediation. Volume 23:Issue 5(2021)
• Page Start: 474
• Page End: 481
• Publication Date: 2021-04-16
• Subjects: Autoradiography -- persistent herbicides -- root absorption -- translocation; Phytoremediation -- Periodicals; 628.5
• DOI: 10.1080/15226514.2020.1825329
• Languages: English
• ISSNs: 1522-6514

Abstract

Abstract: Quinclorac and tebuthiuron are residual herbicides that may remain in the soil longer than for the cropping season. The objective of this research was to evaluate the use of green manure plants to remediate soils treated with quinclorac and tebuthiuron. Soils were separately treated with 14 C-quinclorac and 14 C-tebuthiuron at 266.4 and 132 g ha −1, respectively. After 21 days, four green manure plants, namely Crotalaria spectabilis, Canavalia ensiformis, Stizolobium aterrimum, and Lupinus albus, were separately sown in the treated soils. Overall, all four species absorbed more 14 C-tebuthiuron [ C. ensiformes (22.49%), S. aterrimum (16.71%), L. albus (15%), and C. spectabilis (4.48%)] than 14 C-quinclorac [ C. ensiformis (13.44%), L. albus (10.02%), S. aterrimum (6.2%), and C. spectabilis (1.75%)]. Quinclorac translocation in all four plants was greater in young leaves compared to old leaves, cotyledons, or roots, and 14 C-tebuthiuron translocation in all four plant species was greater in old leaves and cotyledons compared to young leaves or roots. Regardless of the differences in translocation between the two herbicides, the four green manure plants are capable to remediate soils that have been treated with quinclorac and tebuthiuron. However, C. ensiformis is more efficient for the remediation of tebuthiuron-treated soil compared to the other plants.