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Registro Completo |
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Biblioteca(s): |
Embrapa Territorial. |
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Data corrente: |
03/10/2008 |
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Data da última atualização: |
22/08/2014 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
RONQUIM, C. C.; PRADO, C. H. B. de; AVELLAR, L. M. de. |
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Afiliação: |
Carlos Cesar Ronquim (Embrapa Monitoramento por Satelite) Carlos Henrique Britto de Assis Prado ( UFSCar); Lígia Maria de Avellar (IB-USP). |
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Título: |
Estabelecimento de vochysia tucanorum (C.K. spreng.) mart. (vochysiaceae) em área sombreada e aberta. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: CONGRESSO NACIONAL DE BOTÂNICA, 59., 2008. Anais: atualidades, desafios e perspectivas da Botânica no Brasil. Natal, RN: Imagem Gráfica, 2008. |
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Páginas: |
1p. |
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Descrição Física: |
1 CD-ROM |
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Idioma: |
Português |
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Conteúdo: |
Respostas de longo prazo tais como o desenvolvimento inicial, a taxa de sobrevivência, a concentração de nutrientes foliares e o conteúdo de clorofila foram determinados para avaliar a performance de indivíduos jovens de Vochysia tucanorum (C.K.Spreng.) Mart. crescendo sob sombra ou em área aberta. As trocas gasosas foliares e a fluorescência da clorofila foram determinadas durante os cursos diários nas estações seca e chuvosa para se obter respostas imediatas do balanço hídrico e de carbono. Sob sombra ocorreu um efeito negativo e significativo na taxa de sobrevivência e crescimento... |
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Palavras-Chave: |
Comprimento radicular; Flurescência da clorofila; Irradiância; Taxa fotossintética líquida. |
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Thesagro: |
Biomassa; Sobrevivência. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/107148/1/2169.pdf
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Marc: |
LEADER 01394nam a2200217 a 4500
001 1017714
005 2014-08-22
008 2008 bl uuuu u00u1 u #d
100 1 $aRONQUIM, C. C.
245 $aEstabelecimento de vochysia tucanorum (C.K. spreng.) mart. (vochysiaceae) em área sombreada e aberta.$h[electronic resource]
260 $aIn: CONGRESSO NACIONAL DE BOTÂNICA, 59., 2008. Anais: atualidades, desafios e perspectivas da Botânica no Brasil. Natal, RN: Imagem Gráfica$c2008
300 $a1p.$c1 CD-ROM
520 $aRespostas de longo prazo tais como o desenvolvimento inicial, a taxa de sobrevivência, a concentração de nutrientes foliares e o conteúdo de clorofila foram determinados para avaliar a performance de indivíduos jovens de Vochysia tucanorum (C.K.Spreng.) Mart. crescendo sob sombra ou em área aberta. As trocas gasosas foliares e a fluorescência da clorofila foram determinadas durante os cursos diários nas estações seca e chuvosa para se obter respostas imediatas do balanço hídrico e de carbono. Sob sombra ocorreu um efeito negativo e significativo na taxa de sobrevivência e crescimento...
650 $aBiomassa
650 $aSobrevivência
653 $aComprimento radicular
653 $aFlurescência da clorofila
653 $aIrradiância
653 $aTaxa fotossintética líquida
700 1 $aPRADO, C. H. B. de
700 1 $aAVELLAR, L. M. de
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Registro original: |
Embrapa Territorial (CNPM) |
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Biblioteca |
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Origem |
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Classificação |
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Registro |
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URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente; Embrapa Solos. |
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Data corrente: |
18/05/2004 |
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Data da última atualização: |
20/09/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
PARAIBA, L. C.; CERDEIRA, A. L.; SILVA, E. F. da; MARTINS, J. S.; COUTINHO, H. L. da C. |
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Afiliação: |
LOURIVAL COSTA PARAIBA, CNPMA; ANTONIO LUIZ CERDEIRA, CNPMA; ENIO FRAGA DA SILVA, CNPS; Embrapa Solos; HEITOR LUIZ DA COSTA COUTINHO, CNPS. |
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Título: |
Evaluation of soil temperature effect on herbicide leaching potential into groundwater in the brazilian cerrado. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Chemosphere, Oxford, v. 53, p. 1087-1095, 2003. |
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Idioma: |
Inglês |
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Conteúdo: |
The effect of annual variations in the daily average soil temperatures, at different depths, on the calculation of pesticide leaching potential indices is presented. This index can be applied to assess the risk of groundwater contamination by a pesticide. It considers the effects of water table depth, daily recharge net rate, pesticide sorption coefficient, and degradation rate of the pesticide in the soil. The leaching potential index is frequently used as a screening indicator in pesticide groundwater contamination studies, and the temperature effect involved in its calculation is usually not considered. It is well known that soil temperature affects pesticide degradation rates, air-water partition coefficient, and water-soil partition coefficient. These three parameters are components of the attenuation and retardation factors, as well as the leaching potential index, and contribute to determine pesticide behavior in the environment. The Arrhenius, van't Hoff, and Clausius-Clapeyron equations were used in this work to estimate the soil temperature effect on pesticide degradation rate, air-water partition coefficient, and water--soil partition coefficient, respectively. The relationship between leaching potential index and soil temperature at different depths is presented and aids in the understanding of how potential pesticide groundwater contamination varies on different climatic conditions. Numerical results will be presented for 31 herbicides known to be used in corn and soybean crops grown on the municipality of São Gabriel do Oeste, Mato Grosso do Sul State, Brazil. MenosThe effect of annual variations in the daily average soil temperatures, at different depths, on the calculation of pesticide leaching potential indices is presented. This index can be applied to assess the risk of groundwater contamination by a pesticide. It considers the effects of water table depth, daily recharge net rate, pesticide sorption coefficient, and degradation rate of the pesticide in the soil. The leaching potential index is frequently used as a screening indicator in pesticide groundwater contamination studies, and the temperature effect involved in its calculation is usually not considered. It is well known that soil temperature affects pesticide degradation rates, air-water partition coefficient, and water-soil partition coefficient. These three parameters are components of the attenuation and retardation factors, as well as the leaching potential index, and contribute to determine pesticide behavior in the environment. The Arrhenius, van't Hoff, and Clausius-Clapeyron equations were used in this work to estimate the soil temperature effect on pesticide degradation rate, air-water partition coefficient, and water--soil partition coefficient, respectively. The relationship between leaching potential index and soil temperature at different depths is presented and aids in the understanding of how potential pesticide groundwater contamination varies on different climatic conditions. Numerical results will be presented for 31 herbicides known to be used in corn a... Mostrar Tudo |
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Palavras-Chave: |
Água subterrânea; Índice. |
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Thesagro: |
Agrotóxico; Cerrado; Contaminação; Herbicida; Impacto ambiental; Lixiviação; Pesticida; Solo; Temperatura; Temperatura do Solo. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/163813/1/Paraiba-Evaluation-6433.pdf
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Marc: |
LEADER 02483naa a2200313 a 4500
001 1015085
005 2017-09-20
008 2003 bl uuuu u00u1 u #d
100 1 $aPARAIBA, L. C.
245 $aEvaluation of soil temperature effect on herbicide leaching potential into groundwater in the brazilian cerrado.$h[electronic resource]
260 $c2003
520 $aThe effect of annual variations in the daily average soil temperatures, at different depths, on the calculation of pesticide leaching potential indices is presented. This index can be applied to assess the risk of groundwater contamination by a pesticide. It considers the effects of water table depth, daily recharge net rate, pesticide sorption coefficient, and degradation rate of the pesticide in the soil. The leaching potential index is frequently used as a screening indicator in pesticide groundwater contamination studies, and the temperature effect involved in its calculation is usually not considered. It is well known that soil temperature affects pesticide degradation rates, air-water partition coefficient, and water-soil partition coefficient. These three parameters are components of the attenuation and retardation factors, as well as the leaching potential index, and contribute to determine pesticide behavior in the environment. The Arrhenius, van't Hoff, and Clausius-Clapeyron equations were used in this work to estimate the soil temperature effect on pesticide degradation rate, air-water partition coefficient, and water--soil partition coefficient, respectively. The relationship between leaching potential index and soil temperature at different depths is presented and aids in the understanding of how potential pesticide groundwater contamination varies on different climatic conditions. Numerical results will be presented for 31 herbicides known to be used in corn and soybean crops grown on the municipality of São Gabriel do Oeste, Mato Grosso do Sul State, Brazil.
650 $aAgrotóxico
650 $aCerrado
650 $aContaminação
650 $aHerbicida
650 $aImpacto ambiental
650 $aLixiviação
650 $aPesticida
650 $aSolo
650 $aTemperatura
650 $aTemperatura do Solo
653 $aÁgua subterrânea
653 $aÍndice
700 1 $aCERDEIRA, A. L.
700 1 $aSILVA, E. F. da
700 1 $aMARTINS, J. S.
700 1 $aCOUTINHO, H. L. da C.
773 $tChemosphere, Oxford$gv. 53, p. 1087-1095, 2003.
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Embrapa Meio Ambiente (CNPMA) |
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