SUGARCANE HERBICIDE LEACHING RISK EVALUATION IN GUARANY AQUIFER

Publicado
2008-09-20
Palavras-chave: CMLS94, groundwater, biofuel.

    Autores

  • Lourival Costa Paraíba
  • Karen Kataguiri
  • Antonio Luiz Cerdeira
  • Sônia Cláudia Nascimento de Queiroz
  • Vera Lúcia Ferracini

Resumo

The region of Ribeirão Preto, São Paulo State, Brazil, is located over recharge area of the Guarany
aquifer, the most important source of groundwater in the South Central region of the country. This region is also the
most important sugarcane producing area of the country which produces a large amount of the ethanol. This study was
conducted to determine the potential risk of herbicide groundwater contamination. The leaching risk potential of
herbicides to groundwater was conducted using the weather simulator “Weather Generator” (WGEN) coupled with the
model “Chemical Movement Trough Layered Soils” (CMLS94). The following herbicides were evaluated in clayey and
sandy soils (Typic Haplorthox and Typic Quartzipsamment soils) found in the region: ametryn (N-ethyl-N'-(1-
methylethyl)-6-(methylthio)-1,3,5-triazine-2,4-diamine), atrazine (6-chloro-N-ethyl-N'-(1-methylethyl)-1,3,5-triazine-
2,4-diamine), clomazone (2-[(2-chlorophenyl)methyl]-4,4-dimethyl-3-isoxazolidinone), diuron (3,4-dichlorophenyl)-
N,N-dimethylurea), halosulfuron (3-chloro-5-[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl], hexazinone (3-
cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4 (1H,3H)-dione), imazapic ((±)-2-[4,5-dihydro-4-methyl-4-
(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-methyl-3-pyridinecarboxylic acid), imazapyr ((±)-2-[4,5-dihydro-4-methyl-
4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-pyridinecarboxylic acid), MCPA (4-chloro-2-methylphenoxy)acetic
acid), metribuzin (4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one), MSMA (Amonosodium salt
of MAA), paraquat (1,1'-dimethyl-4,4'-bipyridinium ion), pendimethalin (N-(1-ethylpropyl)-3,4-dimethyl-2,6-
dinitrobenzenamine), picloram (4-amino-3,5,6-trichloro-2-pyridinecarboxylic acid), simazine (6-chloro-N,N'-diethyl-
1,3,5-triazine-2,4-diamine), sulfentrazone [N-[2,4-dichloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-
1,2,4-triazol-1-yl]phenyl]methanesulfonamide], and tebuthiuron [N-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N'-
dimethylurea]. Results obtained by our simulation study have shown that the herbicides picloram, tebuthiuron, and
metribuzin have the highest leaching potential, in either sandy or clayey soils, with picloram reaching the root zone of
sugarcane at 0.6m in less than 150 days.

Como Citar
Paraíba, L. C., Kataguiri, K., Cerdeira, A. L., Queiroz, S. C. N. de, & Ferracini, V. L. (2008). SUGARCANE HERBICIDE LEACHING RISK EVALUATION IN GUARANY AQUIFER. Águas Subterrâneas. Recuperado de https://aguassubterraneas.abas.org/asubterraneas/article/view/23838