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Registro Completo |
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
16/08/2001 |
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Data da última atualização: |
27/09/2004 |
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Autoria: |
SILVA, P. R. F. da; RIZZARDI, M. A. R. |
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Título: |
Resposta de Cultivares e Girassol a Densidade de Plantas em Duas Epocas de Semeadura. II. Caracterisitcas Associadas a Colheita. |
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Ano de publicação: |
1993 |
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Fonte/Imprenta: |
Pesquisa Agropecuaria Brasileira, Brasilia, v.28, n.6, p.689-700,jun.1993 |
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Idioma: |
Português |
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Conteúdo: |
Este experimento foi conduzido em Eldorado do Sul, Rio Grande do Sul, com o objetivo de avaliar os efeitos da densidade de plantas, em duas epocas de semeadura de tres cultivares de girassol, sobre a porcentagem de acamamento e/ou quebra de plantas e outras caracteristicas agronomicas associadas a colheita mecanizada. Visou tambem verificar a eficiencia da epoca de semeadura a densidade de plantas como praticas de manejo para antecipar a colheita do girassol. Para tanto, foram utilizadas as cultivares Contisol 711, Dekalb 180 e GR-10, semeadas em 28 de julho e 18 de setembro de 1989, na densidade de 30, 50, 70 e 90 mil plantas/ha. O aumento na densidade de plantas reduziu o diametro de caule e de capitulo. Por outro lado, a estatura de plantas aumentou com a elevação na densidade de plantas. Independentemente da densidade de plantas, a cultivar de porte alto (GR-10) apresentou maior acamamento do que as demais. A elevacao na densidade de plantas antecipou o florescimento, diminuiu a duracao do subperiodo maturacao fisiologica-colheita, bem como acelerou a perda de umidade tanto dos graos quanto do receptaculo, independentemente da cultivar e da epoca de semeadura. Este aspecto, associado a semeadura precoce (final de julho), propiciou a antecipacao na colheita. |
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Palavras-Chave: |
Acamamento; caracteristicas aronomicas; estadios de desenvolvimento; umidade de graos e receptaculo. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/20525/1/pab05_jun_93.pdf
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Marc: |
LEADER 01909naa a2200181 a 4500
001 1105431
005 2004-09-27
008 1993 bl uuuu u00u1 u #d
100 1 $aSILVA, P. R. F. da
245 $aResposta de Cultivares e Girassol a Densidade de Plantas em Duas Epocas de Semeadura. II. Caracterisitcas Associadas a Colheita.
260 $c1993
520 $aEste experimento foi conduzido em Eldorado do Sul, Rio Grande do Sul, com o objetivo de avaliar os efeitos da densidade de plantas, em duas epocas de semeadura de tres cultivares de girassol, sobre a porcentagem de acamamento e/ou quebra de plantas e outras caracteristicas agronomicas associadas a colheita mecanizada. Visou tambem verificar a eficiencia da epoca de semeadura a densidade de plantas como praticas de manejo para antecipar a colheita do girassol. Para tanto, foram utilizadas as cultivares Contisol 711, Dekalb 180 e GR-10, semeadas em 28 de julho e 18 de setembro de 1989, na densidade de 30, 50, 70 e 90 mil plantas/ha. O aumento na densidade de plantas reduziu o diametro de caule e de capitulo. Por outro lado, a estatura de plantas aumentou com a elevação na densidade de plantas. Independentemente da densidade de plantas, a cultivar de porte alto (GR-10) apresentou maior acamamento do que as demais. A elevacao na densidade de plantas antecipou o florescimento, diminuiu a duracao do subperiodo maturacao fisiologica-colheita, bem como acelerou a perda de umidade tanto dos graos quanto do receptaculo, independentemente da cultivar e da epoca de semeadura. Este aspecto, associado a semeadura precoce (final de julho), propiciou a antecipacao na colheita.
653 $aAcamamento
653 $acaracteristicas aronomicas
653 $aestadios de desenvolvimento
653 $aumidade de graos e receptaculo
700 1 $aRIZZARDI, M. A. R.
773 $tPesquisa Agropecuaria Brasileira, Brasilia$gv.28, n.6, p.689-700,jun.1993
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Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
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Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
26/11/2019 |
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Data da última atualização: |
26/11/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 4 |
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Autoria: |
JONSSON, C. M.; MOURA, M. A. M. de; FERRACINI, V. L.; PARAIBA, L. C.; ASSALIN, M. R.; QUEIROZ, S. C. do N. de. |
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Afiliação: |
CLAUDIO MARTIN JONSSON, CNPMA; MONICA ACAUI MARCONDES DE MOURA, IB Campinas; VERA LUCIA FERRACINI, CNPMA; LOURIVAL COSTA PARAIBA, CNPMA; MARCIA REGINA ASSALIN, CNPMA; SONIA CLAUDIA DO N DE QUEIROZ, CNPMA. |
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Título: |
Bioconcentrations of herbicides used in sugarcane crops in tilapia (Oreochromis niloticus) and the risk for human consumption. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Heliyon, v. 5, n. 8, 2019. Article e02237. |
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ISSN: |
2405-8440 |
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DOI: |
https://doi.org/10.1016/j.heliyon.2019.e02237 |
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Idioma: |
Inglês |
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Conteúdo: |
The practice of intensive herbicide use in the sugarcane industry has a high risk of compromising the quality of the water and the organisms that live there due to losses through runoff, leaching and other processes. In this work, the dynamics of four herbicides present in three different mixtures were evaluated through their incor- poration and elimination in the muscle tissue of tilapia (Oreochromis niloticus). The highest mean values of bio- concentration factors were 1.730 for ametryn, 0.891 for tebuthiuron, 0.322 for hexazinone and 4.783 for diuron. Diuron presented the highest risk regarding the consumption of tilapia fillets by the population. However, considering that the fish would reach maximum levels of diuron when exposed to extremely high concentrations, an individual weighing 70 kg would need to ingest approximately 1.5 kg of this food product to surpass the acceptable daily intake of 0.007 mg kg 1 body weight. It was concluded that the risk of injury to the population consuming tilapia fillets from fish exposed to herbicides in water arising from sugarcane activities is very low. According to the risk estimation performed in this work, which is substantiated by the assumptions of the World Health Organization and the International Life Sciences Institute, there is a low risk of injury to the population consuming tilapia fillets from fish exposed to water containing herbicides in concentrations arising from sugarcane activities. However, as the risk was estimated from laboratory conditions, caution should be taken where herbicide applications are carried out with high frequency near water bodies, as the consumption of fish from these areas is quite common. MenosThe practice of intensive herbicide use in the sugarcane industry has a high risk of compromising the quality of the water and the organisms that live there due to losses through runoff, leaching and other processes. In this work, the dynamics of four herbicides present in three different mixtures were evaluated through their incor- poration and elimination in the muscle tissue of tilapia (Oreochromis niloticus). The highest mean values of bio- concentration factors were 1.730 for ametryn, 0.891 for tebuthiuron, 0.322 for hexazinone and 4.783 for diuron. Diuron presented the highest risk regarding the consumption of tilapia fillets by the population. However, considering that the fish would reach maximum levels of diuron when exposed to extremely high concentrations, an individual weighing 70 kg would need to ingest approximately 1.5 kg of this food product to surpass the acceptable daily intake of 0.007 mg kg 1 body weight. It was concluded that the risk of injury to the population consuming tilapia fillets from fish exposed to herbicides in water arising from sugarcane activities is very low. According to the risk estimation performed in this work, which is substantiated by the assumptions of the World Health Organization and the International Life Sciences Institute, there is a low risk of injury to the population consuming tilapia fillets from fish exposed to water containing herbicides in concentrations arising from sugarcane activities. However, as the risk was estimat... Mostrar Tudo |
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Thesagro: |
Herbicida; Poluição da Água; Tilápia; Toxicologia de Alimento. |
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Thesaurus NAL: |
Acceptable daily intake; Chemical hazards; Chemical risk assessment; Ecotoxicology; Food safety; Herbicide residues; Oreochromis; Water pollution. |
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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/205533/1/Jonsson-Bioconcentrations-Herbicides-2019.pdf
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Marc: |
LEADER 02771naa a2200349 a 4500
001 2115211
005 2019-11-26
008 2019 bl uuuu u00u1 u #d
022 $a2405-8440
024 7 $ahttps://doi.org/10.1016/j.heliyon.2019.e02237$2DOI
100 1 $aJONSSON, C. M.
245 $aBioconcentrations of herbicides used in sugarcane crops in tilapia (Oreochromis niloticus) and the risk for human consumption.$h[electronic resource]
260 $c2019
520 $aThe practice of intensive herbicide use in the sugarcane industry has a high risk of compromising the quality of the water and the organisms that live there due to losses through runoff, leaching and other processes. In this work, the dynamics of four herbicides present in three different mixtures were evaluated through their incor- poration and elimination in the muscle tissue of tilapia (Oreochromis niloticus). The highest mean values of bio- concentration factors were 1.730 for ametryn, 0.891 for tebuthiuron, 0.322 for hexazinone and 4.783 for diuron. Diuron presented the highest risk regarding the consumption of tilapia fillets by the population. However, considering that the fish would reach maximum levels of diuron when exposed to extremely high concentrations, an individual weighing 70 kg would need to ingest approximately 1.5 kg of this food product to surpass the acceptable daily intake of 0.007 mg kg 1 body weight. It was concluded that the risk of injury to the population consuming tilapia fillets from fish exposed to herbicides in water arising from sugarcane activities is very low. According to the risk estimation performed in this work, which is substantiated by the assumptions of the World Health Organization and the International Life Sciences Institute, there is a low risk of injury to the population consuming tilapia fillets from fish exposed to water containing herbicides in concentrations arising from sugarcane activities. However, as the risk was estimated from laboratory conditions, caution should be taken where herbicide applications are carried out with high frequency near water bodies, as the consumption of fish from these areas is quite common.
650 $aAcceptable daily intake
650 $aChemical hazards
650 $aChemical risk assessment
650 $aEcotoxicology
650 $aFood safety
650 $aHerbicide residues
650 $aOreochromis
650 $aWater pollution
650 $aHerbicida
650 $aPoluição da Água
650 $aTilápia
650 $aToxicologia de Alimento
700 1 $aMOURA, M. A. M. de
700 1 $aFERRACINI, V. L.
700 1 $aPARAIBA, L. C.
700 1 $aASSALIN, M. R.
700 1 $aQUEIROZ, S. C. do N. de
773 $tHeliyon$gv. 5, n. 8, 2019. Article e02237.
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Embrapa Meio Ambiente (CNPMA) |
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