Phytoremediation of soils contaminated with the herbicide sulfentrazone by green manure species
Abstract
In face of the new technologies, phytoremediation is presented as an option for the decontamination of areas that have suffered with intense herbicide applications. This study aimed to evaluate the potential of remediation to sulfentrazone by green manure species, such as sunn hemp (Crotalaria juncea), jack bean (Canavalia ensiformis), pigeon pea (Cajanus cajan) and dwarf pigeon pea (Cajanus cajan dwarf). Dwarf mucuna (Stizolobium deeringianum) was used as the bioindicator plant of soil residues, which succeeded the remedial species. The experiment was carried out in a greenhouse using pots with 10 dm3, collected from the depth of 0-0.2 m. The treatments were composed by the combination of four green manure species and four doses of sulfentrazone (0, 200, 400 and 800 g ha–1), plus one treatment without crop (control). The height of plants, phytotoxicity to sulfentrazone, and fresh and dry matter of shoots were evaluated. C. juncea was the most efficient species on the decontamination of sulfentrazone in soil up to 400 g ha–1. These results do not exclude the continuation of studies with C. cajan, C. cajan (dwarf) and C. ensiformis, which showed satisfactory results using S. deeringianum as the bioindicator plant.
Downloads
Authors retain copyright and grant the Journal the right to the first publication. Authors are encouraged to and may self-archive a created version of their article in their institutional repository, or as a book chapter, as long as acknowledgement is given to the original source of publication. As the Journal provides open access to its publications, articles may not be used for commercial purposes. The contents published are the sole and exclusive responsibility of their authors; however, the publishers can make textual adjustments, adaptation to publishing standards and adjustments of spelling and grammar, to maintain the standard patterns of the language and the journal. Failure to comply with this commitment will submit the offenders to sanctions and penalties under the Brazilian legislation (Law of Copyright Protection; nº 9,610; 19 February 1998).