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Registro Completo |
Biblioteca(s): |
Embrapa Hortaliças; Embrapa Mandioca e Fruticultura. |
Data corrente: |
20/04/1998 |
Data da última atualização: |
09/11/2010 |
Autoria: |
SILVA, A. de S.; MAGALHAES, A. A. de; SANTOS, E. D.; MORGADO, L. B. |
Título: |
Irrigacao por potes de barro: descricao do metodo e testes preliminares. |
Ano de publicação: |
1982 |
Fonte/Imprenta: |
Petrolina: EMBRAPA-CPATSA, 1982. |
Páginas: |
4Op. |
Série: |
(EMBRAPA-CPATSA. Boletim de Pesquisa, 10). |
Idioma: |
Português |
Conteúdo: |
Nas regiões semi-áridas do mundo, áreas consideráveis de terra não são integradas ao processo produtivo devido as limitações dos recursos edáficos e, principalmente, dos recursos hídricos, permanecendo sem exploração ou exploradas precariamente sem nenhuma base conservacionista de solo e água. O nordeste semi- árido brasileiro apresenta algumas características que lhe são peculiares, como: solos rasos e pedregosos com baixa capacidade de retenção de água, baixo teor de matéria orgânica, evaporação situando-se em torno de 2.000 mm/ano, alta potencialidade para erosão hídrica e temperatura elevadas, com médias anuais, variando de 23 a 28 C. Estas características edafo-climáticas, associadas a instabilidade climática, representada, principalmente, pela escassez e intermitência das chuvas, tem sido responsáveis pela incerteza das safras, Silva, Porto e Gomes (1981). |
Palavras-Chave: |
Pote de barro. |
Thesagro: |
Irrigação; Método. |
Thesaurus Nal: |
irrigation. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01499nam a2200217 a 4500 001 1760371 005 2010-11-09 008 1982 bl uuuu u0uu1 u #d 100 1 $aSILVA, A. de S. 245 $aIrrigacao por potes de barro$bdescricao do metodo e testes preliminares. 260 $aPetrolina: EMBRAPA-CPATSA$c1982 300 $a4Op. 490 $a(EMBRAPA-CPATSA. Boletim de Pesquisa, 10). 520 $aNas regiões semi-áridas do mundo, áreas consideráveis de terra não são integradas ao processo produtivo devido as limitações dos recursos edáficos e, principalmente, dos recursos hídricos, permanecendo sem exploração ou exploradas precariamente sem nenhuma base conservacionista de solo e água. O nordeste semi- árido brasileiro apresenta algumas características que lhe são peculiares, como: solos rasos e pedregosos com baixa capacidade de retenção de água, baixo teor de matéria orgânica, evaporação situando-se em torno de 2.000 mm/ano, alta potencialidade para erosão hídrica e temperatura elevadas, com médias anuais, variando de 23 a 28 C. Estas características edafo-climáticas, associadas a instabilidade climática, representada, principalmente, pela escassez e intermitência das chuvas, tem sido responsáveis pela incerteza das safras, Silva, Porto e Gomes (1981). 650 $airrigation 650 $aIrrigação 650 $aMétodo 653 $aPote de barro 700 1 $aMAGALHAES, A. A. de 700 1 $aSANTOS, E. D. 700 1 $aMORGADO, L. B.
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Embrapa Hortaliças (CNPH) |
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Registro Completo
Biblioteca(s): |
Embrapa Pecuária Sudeste. |
Data corrente: |
13/05/2022 |
Data da última atualização: |
10/03/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
Autoria: |
AMARAL, G. C.; PEZZOPANE, J. E. M.; NÓIA JÚNIOR, R. DE S.; FONSECA, M. D. S.; FERNÁNDEZ MARTÍNEZ, M.; GOMES, V. DE O.; TOLEDO, J. V.; PEZZOPANE, J. R. M.; TAPIAS MARTÍN, R. |
Afiliação: |
GENILDA CANUTO AMARAL, Federal University of Espírito Santo; JOSÉ EDUARDO MACEDO PEZZOPANE, Federal University of Espírito Santo; ROGÉRIO DE SOUZA NÓIA JÚNIOR, Technical University of Munich; MARIANA DUARTE SILVA FONSECA, Federal University of Espírito Santo; MANUEL FERNÁNDEZ MARTÍNEZ, University of Huelva; VANESSA DE OLIVEIRA GOMES, Federal University of Espírito Santo; JOÃO VITOR TOLEDO, Federal University of Espírito Santo; JOSE RICARDO MACEDO PEZZOPANE, CPPSE; RAÚL TAPIAS MARTÍN, University of Huelva. |
Título: |
Climate change and the growth of Amazonian species seedlings: an ecophysiological approach to Euterpe oleracea. |
Ano de publicação: |
2023 |
Fonte/Imprenta: |
New Forests, v. 54, p. 269-287, 2023. |
DOI: |
https://doi.org/10.1007/s11056-022-09921-1 |
Idioma: |
Inglês |
Conteúdo: |
Climate change threatens many native species from the Amazon Forest. Among the endangered species is the Açaí (Euterpe oleracea), which is a species with great national and international interest, due to the nutritional benefits and medicinal properties of its fruits. However, there is still no information on the ecophysiological responses of Açaí to climate change. Thus, the objective of this work was to evaluate the effect of increased temperature and CO2 concentration change on the ecophysiology of Açaí seedlings. To do so, Açaí seedlings were subjected, for 90 days, to three different climatic scenarios: current Amazon; RCP4.5 (current average temperature in the Amazon?+?2.5 °C and 538 ppm of carbon dioxide concentration i.e. CO2); and RCP8.5 (+?4.5 °C and 936 ppm of CO2 concentration). In addition, two irrigation levels were applied within each climatic scenario: seedlings maintained at 90% (not stressed) and 40% (stressed) of the water holding capacity of the substrate. Gas exchange, water status, fluorescence parameters, enzymatic antioxidants activity and dry matter production were evaluated. High CO2 concentration enhanced Açaí gas exchange (increasing CO2 assimilation), regardless of substrate water availability and temperature. However, high temperature and high vapor-pressure deficit reduced quantum yield and increased the minimum fluorescence and enzymatic antioxidants activity. With that, Açaí seedlings did not convert the additional assimilated carbon (due to higher CO2 concentration) into biomass, showing decreased total dry mass accumulation for RCP4.5 and RCP8.5 climate scenarios. Our results indicated that the positive impacts of increased CO2 concentration to gas exchange may not offset the negative impacts of increased air temperature and VPD to Açaí growth. MenosClimate change threatens many native species from the Amazon Forest. Among the endangered species is the Açaí (Euterpe oleracea), which is a species with great national and international interest, due to the nutritional benefits and medicinal properties of its fruits. However, there is still no information on the ecophysiological responses of Açaí to climate change. Thus, the objective of this work was to evaluate the effect of increased temperature and CO2 concentration change on the ecophysiology of Açaí seedlings. To do so, Açaí seedlings were subjected, for 90 days, to three different climatic scenarios: current Amazon; RCP4.5 (current average temperature in the Amazon?+?2.5 °C and 538 ppm of carbon dioxide concentration i.e. CO2); and RCP8.5 (+?4.5 °C and 936 ppm of CO2 concentration). In addition, two irrigation levels were applied within each climatic scenario: seedlings maintained at 90% (not stressed) and 40% (stressed) of the water holding capacity of the substrate. Gas exchange, water status, fluorescence parameters, enzymatic antioxidants activity and dry matter production were evaluated. High CO2 concentration enhanced Açaí gas exchange (increasing CO2 assimilation), regardless of substrate water availability and temperature. However, high temperature and high vapor-pressure deficit reduced quantum yield and increased the minimum fluorescence and enzymatic antioxidants activity. With that, Açaí seedlings did not convert the additional assimilated carbon (due to ... Mostrar Tudo |
Palavras-Chave: |
Amazon; High CO2. |
Thesagro: |
Açaí. |
Thesaurus NAL: |
Gas exchange; Temperature; Water stress. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
Marc: |
LEADER 02725naa a2200301 a 4500 001 2142929 005 2023-03-10 008 2023 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1007/s11056-022-09921-1$2DOI 100 1 $aAMARAL, G. C. 245 $aClimate change and the growth of Amazonian species seedlings$ban ecophysiological approach to Euterpe oleracea.$h[electronic resource] 260 $c2023 520 $aClimate change threatens many native species from the Amazon Forest. Among the endangered species is the Açaí (Euterpe oleracea), which is a species with great national and international interest, due to the nutritional benefits and medicinal properties of its fruits. However, there is still no information on the ecophysiological responses of Açaí to climate change. Thus, the objective of this work was to evaluate the effect of increased temperature and CO2 concentration change on the ecophysiology of Açaí seedlings. To do so, Açaí seedlings were subjected, for 90 days, to three different climatic scenarios: current Amazon; RCP4.5 (current average temperature in the Amazon?+?2.5 °C and 538 ppm of carbon dioxide concentration i.e. CO2); and RCP8.5 (+?4.5 °C and 936 ppm of CO2 concentration). In addition, two irrigation levels were applied within each climatic scenario: seedlings maintained at 90% (not stressed) and 40% (stressed) of the water holding capacity of the substrate. Gas exchange, water status, fluorescence parameters, enzymatic antioxidants activity and dry matter production were evaluated. High CO2 concentration enhanced Açaí gas exchange (increasing CO2 assimilation), regardless of substrate water availability and temperature. However, high temperature and high vapor-pressure deficit reduced quantum yield and increased the minimum fluorescence and enzymatic antioxidants activity. With that, Açaí seedlings did not convert the additional assimilated carbon (due to higher CO2 concentration) into biomass, showing decreased total dry mass accumulation for RCP4.5 and RCP8.5 climate scenarios. Our results indicated that the positive impacts of increased CO2 concentration to gas exchange may not offset the negative impacts of increased air temperature and VPD to Açaí growth. 650 $aGas exchange 650 $aTemperature 650 $aWater stress 650 $aAçaí 653 $aAmazon 653 $aHigh CO2 700 1 $aPEZZOPANE, J. E. M. 700 1 $aNÓIA JÚNIOR, R. DE S. 700 1 $aFONSECA, M. D. S. 700 1 $aFERNÁNDEZ MARTÍNEZ, M. 700 1 $aGOMES, V. DE O. 700 1 $aTOLEDO, J. V. 700 1 $aPEZZOPANE, J. R. M. 700 1 $aTAPIAS MARTÍN, R. 773 $tNew Forests$gv. 54, p. 269-287, 2023.
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