Effect of the populational densities of Panicum maximum (cultivar Tanzânia) in phytoremediation of polluted soil with picloram herbicide

Sergio de Oliveira Procópio, Marcos Lima do Carmo, Fábio Ribeiro Pires, Alberto Cargnelutti Filho, Guilherme Braga Pereira Braz, Welington Fernando Peres Silva, Alberto Leão de Lemos Barroso, Gilson Pereira Silva, Eduardo Lima do Carmo, Antonio Joaquim Braga Pereira Braz, Leandro Pereira Pacheco

Abstract


This research was carried out from September of 2006 to February of 2007, under greenhouse conditions, in Rio Verde –GO/ Brazil to study the influence of Panicum maximum populational density on the phytoremediation of soil contaminated with picloram. The treatments were the combination of four Panicum maximum (cultivar Tanzânia) populational densities (0, 5, 10 e 15 plants per pot, corresponding to a 0, 122, 244 and 366 plants m-2, respectively) and three rates of picloram (0, 80 and 160 g ha-1 applied directly on the pots, simulating levels of soil contamination). After cultivating the phytoremediator specie on substrate during 100 days, soybean Glycine max L was sown at the same pot, used as a phytotoxicity bioindicator specie. Height of plants and green and dry mass of the above ground part of soybean were evaluated. The population density of the phytoremediate species Tanzania influenced the level of phytotoxicity of the herbicide picloram soybean crop sowed in succession. The population density of , 122 plants m-2 was the most efficient in the decontamination of the soil.


Keywords


Carryover; Soil decontamination; Glycine max.



DOI: http://dx.doi.org/10.5433/1679-0359.2009v30n2p295

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
E-mail: semina.agrarias@uel.br
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional