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Título: Decomposition of organic matter in the presence of the herbicide clomazone.
Autor: FERREIRA C. J. A.
JONSSON, C. M.
MAIA, A. de H. N.
Afiliación: EMBRAPA-CNPMA; CLAUDIO MARTIN JONSSON, CNPMA; ALINE DE HOLANDA NUNES MAIA, CNPMA.
Año: 1995
Referencia: In: INTERNATIONAL SYMPOSIUM ON MICROBIAL ECOLOGY, 7., 1995, Santos. Abstracts. Sao Paulo: Sociedade Brasileira de Microbiologia, 1995.
Páginas: p.175
Descripción: Clomazone (2-(2-chlorophenyl) methyl-4.4-dimethyl-3-isoxazolidinone) is a post emergence herbicide widely used in rice fields in Rio Grande do Sul (Brazil) with high activity against Gramineae at the recommended application rate of 700 g/ha. The presence of this chemical in the water may affect microorganisms responsible for the decomposition of organic matter. Thus, a disturbe in the trophic chain sustained by the decompositors could happen. In the present work the decomposition rate of organic matter (Typha latifolia) exposed to several concentrations of a clomazone formulation: 0 (control), 25.0, 62.0, 156.0, 390.0 and 976.0mg/L on the basis of the active ingredient was evaluated. Five litter bags containing about 3.0g of pieces of T. latifolia leaves wereplaced in aquariums with 15 of reconstituted water. In cach aquarium were added 500g of sediment from the same place of the plant collection, as a source of decompositors microorganisms. The results relative tothe control, showed that the decomposition rate in the highest and lowest dose was reduced in 50.05 and 1,28%, respectively, after 80 days.
NAL Thesaurus: clomazone
organic matter
Brazil
Palabras clave: Herbicide
Agrochemical
Post emergence
Rice crop
Decomposition
Rio grande do Sul
Tipo de Material: Resumo em anais e proceedings
Acceso: openAccess
Aparece en las colecciones:Resumo em anais de congresso (CNPMA)

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