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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
16/01/2008 |
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Data da última atualização: |
15/10/2019 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
GORIA, M. M.; GHINI, R.; MARINO, V. |
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Afiliação: |
Marina Meloni Gória, ESALQ-USP; RAQUEL GHINI, CNPMA; Valéria Marino, IAC. |
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Título: |
Impacto do aumento da concentração de CO2 atmosférico sobre a microbiota do solo rizosférico de arroz. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
In: CONGRESSO INTERINSTITUCIONAL DE INICIAÇÃO CIENTÍFICA, 2007, Campinas. Anais... Campinas: ITAL, 2007. 6 p. |
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Idioma: |
Português |
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Conteúdo: |
A intensificação da atividade antrópica está causando significativo aumento da concentração de dióxido de carbono (CO2) na atmosfera, resultando em alterações no clima do planeta que devem ser acentuadas nas próximas décadas. Além das mudanças climáticas previstas, impactos também ocorrerão no ambiente biótico. O trabalho teve por objetivo avaliar os efeitos do aumento do CO2 atmosférico na microbiota do solo rizosférico de arroz (cultivar Agulha Precoce), em ensaio conduzido em estufas de topo aberto. Os tratamentos com injeção automatizada do gás apresentaram concentração média de 613 ppm de CO2. Como testemunha, foram utilizadas parcelas sem estufa e sem injeção do gás. Não houve efeito dos tratamentos no carbono da biomassa microbiana, na hidrólise de diacetato de fluoresceína, no desprendimento de CO2 e na condutividade elétrica do solo rizosférico e no número de bactérias diazotróficas endofíticas isoladas das raízes utilizando-se meio de cultura JNFb semi-específico para Herbaspirillum. Os tratamentos com estufa apresentaram aumento do pH do solo, sendo que o maior aumento foi obtido no tratamento com injeção de CO2. |
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Thesagro: |
Bactéria; Dióxido de Carbono; Impacto Ambiental; Microbiologia do Solo; Microrganismo; Mudança Climática; Solo. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/100393/1/2007AA-018.pdf
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Marc: |
LEADER 01882nam a2200217 a 4500
001 1015647
005 2019-10-15
008 2007 bl uuuu u00u1 u #d
100 1 $aGORIA, M. M.
245 $aImpacto do aumento da concentração de CO2 atmosférico sobre a microbiota do solo rizosférico de arroz.
260 $aIn: CONGRESSO INTERINSTITUCIONAL DE INICIAÇÃO CIENTÍFICA, 2007, Campinas. Anais... Campinas: ITAL, 2007. 6 p.$c2007
520 $aA intensificação da atividade antrópica está causando significativo aumento da concentração de dióxido de carbono (CO2) na atmosfera, resultando em alterações no clima do planeta que devem ser acentuadas nas próximas décadas. Além das mudanças climáticas previstas, impactos também ocorrerão no ambiente biótico. O trabalho teve por objetivo avaliar os efeitos do aumento do CO2 atmosférico na microbiota do solo rizosférico de arroz (cultivar Agulha Precoce), em ensaio conduzido em estufas de topo aberto. Os tratamentos com injeção automatizada do gás apresentaram concentração média de 613 ppm de CO2. Como testemunha, foram utilizadas parcelas sem estufa e sem injeção do gás. Não houve efeito dos tratamentos no carbono da biomassa microbiana, na hidrólise de diacetato de fluoresceína, no desprendimento de CO2 e na condutividade elétrica do solo rizosférico e no número de bactérias diazotróficas endofíticas isoladas das raízes utilizando-se meio de cultura JNFb semi-específico para Herbaspirillum. Os tratamentos com estufa apresentaram aumento do pH do solo, sendo que o maior aumento foi obtido no tratamento com injeção de CO2.
650 $aBactéria
650 $aDióxido de Carbono
650 $aImpacto Ambiental
650 $aMicrobiologia do Solo
650 $aMicrorganismo
650 $aMudança Climática
650 $aSolo
700 1 $aGHINI, R.
700 1 $aMARINO, V.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
04/08/1999 |
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Data da última atualização: |
12/12/2019 |
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Autoria: |
CERDEIRA, A. L.; GOMES, M. A. F.; QUEIROZ, R. C.; BONATO, P. S.; FERRACINI, V. L.; LANCHOTE, V. L. |
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Afiliação: |
ANTONIO LUIZ CERDEIRA, CNPMA; MARCO ANTONIO FERREIRA GOMES, CNPMA; VERA LUCIA FERRACINI, CNPMA. |
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Título: |
Herbicide and nitrate residues in surface and groundwater from sugarcane area in Brazil. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
Bolletino Chimico Farmaceutico, v.138, n.2, p.131, 1999. |
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Idioma: |
Inglês |
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Conteúdo: |
Various studies have demonstrated the presence at high levels of pesticides and nitrate in soil, surface, and groundwater. Prior studies have identified a watershed area in Brazil with a high risk of soil, surface, and groundwater contamination by pesticides at the region of Riberao Preto, SP. Surface and groundwater were collected at the area during the period of October 1995 to November 1998. By means of gas chromatography-mass spectrometry (GC-MS) technique the herbicides tebuthiuron, diuron, simazine, atrazine, and ametryne, and nitrate were analyzed according to the protocols established in literature. The recovery obtained in the extraction procedure was higher than 95% for all herbicides except simazine for which the recovery was 85,6%. Due to the enrichment in the extraction procedure and the sensitive detection at two wavelengths it was possible to obtain a quantification limit of 0.02 ug/L for the herbicides studied. The method was linear over the range of 0.02 to 2.0 ug/L. Soil data showed a higher level of the herbicide tebuthiuron, at the levels of 59.6 ppb; than the other applied during all the months. The results have shown the hercicide tebuthiuron as the one with higher concentrations in groundwater and in January of 1996 the concentration found was 0.08 ug/L, close to the maximum allowed, 0.1 ug/L, but this fact was not consistent during the other months. No residue of the other herbicides was detected. In case of nitrates, with maximum level allowed of 10 mg/L, it was found the maximum of 0.9 mg/l, but in a shallow well inside the area. Commercial wells at the edge of the watershed showed low levels of nitrate, below the risk level, but with potential for dangerous contamination. MenosVarious studies have demonstrated the presence at high levels of pesticides and nitrate in soil, surface, and groundwater. Prior studies have identified a watershed area in Brazil with a high risk of soil, surface, and groundwater contamination by pesticides at the region of Riberao Preto, SP. Surface and groundwater were collected at the area during the period of October 1995 to November 1998. By means of gas chromatography-mass spectrometry (GC-MS) technique the herbicides tebuthiuron, diuron, simazine, atrazine, and ametryne, and nitrate were analyzed according to the protocols established in literature. The recovery obtained in the extraction procedure was higher than 95% for all herbicides except simazine for which the recovery was 85,6%. Due to the enrichment in the extraction procedure and the sensitive detection at two wavelengths it was possible to obtain a quantification limit of 0.02 ug/L for the herbicides studied. The method was linear over the range of 0.02 to 2.0 ug/L. Soil data showed a higher level of the herbicide tebuthiuron, at the levels of 59.6 ppb; than the other applied during all the months. The results have shown the hercicide tebuthiuron as the one with higher concentrations in groundwater and in January of 1996 the concentration found was 0.08 ug/L, close to the maximum allowed, 0.1 ug/L, but this fact was not consistent during the other months. No residue of the other herbicides was detected. In case of nitrates, with maximum level allowed of 10 ... Mostrar Tudo |
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Palavras-Chave: |
Herbicidas; Herbicide; Nitrate; Nitrato de resíduos. |
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Thesaurus NAL: |
sugarcane. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/199623/1/Cerdeira-Herbicide.pdf
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Marc: |
LEADER 02418naa a2200241 a 4500
001 1013142
005 2019-12-12
008 1999 bl uuuu u00u1 u #d
100 1 $aCERDEIRA, A. L.
245 $aHerbicide and nitrate residues in surface and groundwater from sugarcane area in Brazil.$h[electronic resource]
260 $c1999
520 $aVarious studies have demonstrated the presence at high levels of pesticides and nitrate in soil, surface, and groundwater. Prior studies have identified a watershed area in Brazil with a high risk of soil, surface, and groundwater contamination by pesticides at the region of Riberao Preto, SP. Surface and groundwater were collected at the area during the period of October 1995 to November 1998. By means of gas chromatography-mass spectrometry (GC-MS) technique the herbicides tebuthiuron, diuron, simazine, atrazine, and ametryne, and nitrate were analyzed according to the protocols established in literature. The recovery obtained in the extraction procedure was higher than 95% for all herbicides except simazine for which the recovery was 85,6%. Due to the enrichment in the extraction procedure and the sensitive detection at two wavelengths it was possible to obtain a quantification limit of 0.02 ug/L for the herbicides studied. The method was linear over the range of 0.02 to 2.0 ug/L. Soil data showed a higher level of the herbicide tebuthiuron, at the levels of 59.6 ppb; than the other applied during all the months. The results have shown the hercicide tebuthiuron as the one with higher concentrations in groundwater and in January of 1996 the concentration found was 0.08 ug/L, close to the maximum allowed, 0.1 ug/L, but this fact was not consistent during the other months. No residue of the other herbicides was detected. In case of nitrates, with maximum level allowed of 10 mg/L, it was found the maximum of 0.9 mg/l, but in a shallow well inside the area. Commercial wells at the edge of the watershed showed low levels of nitrate, below the risk level, but with potential for dangerous contamination.
650 $asugarcane
653 $aHerbicidas
653 $aHerbicide
653 $aNitrate
653 $aNitrato de resíduos
700 1 $aGOMES, M. A. F.
700 1 $aQUEIROZ, R. C.
700 1 $aBONATO, P. S.
700 1 $aFERRACINI, V. L.
700 1 $aLANCHOTE, V. L.
773 $tBolletino Chimico Farmaceutico$gv.138, n.2, p.131, 1999.
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Embrapa Meio Ambiente (CNPMA) |
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