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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
18/10/1993 |
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Data da última atualização: |
18/10/1993 |
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Autoria: |
SCHOLL, R.; LANGENBACH, T.; CAO, G.; DORFLER, U.; SCHNRIDER, P.; SCHEUNERT, I. |
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Afiliação: |
GSF-Institut fur Bodenokologie, Iogolstadter Landstr. 1 D - 8042 Neuherberg, Germany; Instituto de Microbiologia, UFRJ, Rio de Janeiro, Brasil. |
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Título: |
Fate of [quatorzeC]terbutylazine in soil-plant systems. |
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Ano de publicação: |
1992 |
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Fonte/Imprenta: |
Science of the Total Environment, v.123/124, p.377-389, 1992. |
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Idioma: |
Inglês |
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Conteúdo: |
Lysimeter and laboratory tests were carried out with the 14C-labeled herbicide terbutylazine and a sandy agricultural soil in an application rate of 890 g/ha. The laboratory test in a small plant-soil-ecosystem showed that uptake of residues by maise plants ocurred nearly completely by the root pathway. In the lysimeter study small volatilization chambers were placed on the soil of three lysimeters to get information about volatilization and biodegradation to 14CO2 under outdoor conditions; maize was grown. Volatilization rate were highest at the day of application and then decreased; after 32 days, between 0.30% and 0.36% of the initially applied amount was lost by volatilization during this time period was between 3.07% and 5.26%. Maize plants took up 0.41% of the applied radioactivity; this quatorzeC was due to polar metabolites and to unextractable residues and to unchanged terbutylazine and probably of its metabolites were determined again after tilling the soil Volatilization rates were in the same range as in the first year 30 days after application. quatorzeCO2-formation was lower and no lag phase could be observed. |
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Palavras-Chave: |
soil-plant system; Terbutylazine. |
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Thesaurus Nal: |
biomineralization; lysimeters; volatilization. |
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Categoria do assunto: |
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Marc: |
LEADER 01779naa a2200241 a 4500
001 1646323
005 1993-10-18
008 1992 bl --- 0-- u #d
100 1 $aSCHOLL, R.
245 $aFate of [quatorzeC]terbutylazine in soil-plant systems.
260 $c1992
520 $aLysimeter and laboratory tests were carried out with the 14C-labeled herbicide terbutylazine and a sandy agricultural soil in an application rate of 890 g/ha. The laboratory test in a small plant-soil-ecosystem showed that uptake of residues by maise plants ocurred nearly completely by the root pathway. In the lysimeter study small volatilization chambers were placed on the soil of three lysimeters to get information about volatilization and biodegradation to 14CO2 under outdoor conditions; maize was grown. Volatilization rate were highest at the day of application and then decreased; after 32 days, between 0.30% and 0.36% of the initially applied amount was lost by volatilization during this time period was between 3.07% and 5.26%. Maize plants took up 0.41% of the applied radioactivity; this quatorzeC was due to polar metabolites and to unextractable residues and to unchanged terbutylazine and probably of its metabolites were determined again after tilling the soil Volatilization rates were in the same range as in the first year 30 days after application. quatorzeCO2-formation was lower and no lag phase could be observed.
650 $abiomineralization
650 $alysimeters
650 $avolatilization
653 $asoil-plant system
653 $aTerbutylazine
700 1 $aLANGENBACH, T.
700 1 $aCAO, G.
700 1 $aDORFLER, U.
700 1 $aSCHNRIDER, P.
700 1 $aSCHEUNERT, I.
773 $tScience of the Total Environment$gv.123/124, p.377-389, 1992.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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