Title:	Decomposition of organic matter in the presence of the herbicide clomazone.
Authors:	FERREIRA C. J. A. JONSSON, C. M. MAIA, A. de H. N.
Affiliation:	EMBRAPA-CNPMA; CLAUDIO MARTIN JONSSON, CNPMA; ALINE DE HOLANDA NUNES MAIA, CNPMA.
Date Issued:	1995
Citation:	In: INTERNATIONAL SYMPOSIUM ON MICROBIAL ECOLOGY, 7., 1995, Santos. Abstracts. Sao Paulo: Sociedade Brasileira de Microbiologia, 1995.
Pages:	p.175
Description:	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
Keywords:	Herbicide Agrochemical Post emergence Rice crop Decomposition Rio grande do Sul
Type of Material:	Resumo em anais e proceedings
Access:	openAccess
Appears in Collections:	Resumo em anais de congresso (CNPMA)