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Registro Completo |
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Biblioteca(s): |
Embrapa Acre. |
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Data corrente: |
06/11/2023 |
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Data da última atualização: |
06/11/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ARAÚJO, J. M.; ANDRADE NETO, R. de C.; ALMEIDA, U. O. de; SEBIM, J. P. M.; ABREU, M. G. P. de; COSTA, D. A. da. |
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Afiliação: |
JAMES MACIEL DE ARAÚJO, UNIVERSIDADE FEDERAL DO ACRE; ROMEU DE CARVALHO ANDRADE NETO, CPAF-AC; UELITON OLIVEIRA DE ALMEIDA, INSTITUTO FEDERAL DO ACRE; JOÃO PAULO MARIM SEBIM, UNIVERSIDADE DE SÃO PAULO; MARCOS GIOVANE PEDROZA DE ABREU, UNIVERSIDADE ESTADUAL PAULISTA JÚLIO DE MESQUITA FILHO; DAVID AQUINO DA COSTA, INSTITUTO FEDERAL DO ACRE. |
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Título: |
Production of açaí seedlings under different shade levels and controlled release fertilizer. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Revista de Agricultura Neotropical, v. 10, n. 3, e7325, July/Sept. 2023. |
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ISSN: |
2358-6303 |
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DOI: |
https://doi.org/10.32404/rean.v10i3.7325 |
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Idioma: |
Inglês |
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Conteúdo: |
This study aimed to evaluate the production and quality of açaí seedlings regarding the presence and absence of controlled-release fertilization under different shading levels. The study was conducted at the experimental field of Embrapa - Acre, using a completely randomized design in a 4 x 4 factorial arrangement. The factors included four evaluation periods (60, 120, 180, and 240 days after transplanting) and four shading environments (20%, 30%, 50%, and 75%), along with the presence or absence of controlled-release fertilization. The following variables were analyzed: plant height, stem diameter, number of leaves, dry mass of leaves, stem, root, and total dry mass, as well as the seedling quality index and foliar levels of macro and micronutrients. The growth and development of açaí seedlings are influenced by the evaluation periods, shade environments, and the use of fertilization. Fertilization with controlled-release fertilizer and environments with30% and 50% shading improved the quality of açaí palm seedlings. |
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Palavras-Chave: |
Acre; Amazonia Occidental; Amazônia Ocidental; Assai palm; Embrapa Acre; Fertilizantes de acción retardada; Granjas de demostración; Producción de plántulas; Rio Branco (AC); Sombra; Western Amazon. |
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Thesagro: |
Açaí; Adubação; Campo Experimental; Euterpe Oleracea; Muda; Produção; Sombreamento. |
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Thesaurus Nal: |
Demonstration farms; Seedling production; Shade; Slow-release fertilizers. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1157791/1/27552.pdf
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Marc: |
LEADER 02412naa a2200469 a 4500
001 2157791
005 2023-11-06
008 2023 bl uuuu u00u1 u #d
022 $a2358-6303
024 7 $ahttps://doi.org/10.32404/rean.v10i3.7325$2DOI
100 1 $aARAÚJO, J. M.
245 $aProduction of açaí seedlings under different shade levels and controlled release fertilizer.$h[electronic resource]
260 $c2023
520 $aThis study aimed to evaluate the production and quality of açaí seedlings regarding the presence and absence of controlled-release fertilization under different shading levels. The study was conducted at the experimental field of Embrapa - Acre, using a completely randomized design in a 4 x 4 factorial arrangement. The factors included four evaluation periods (60, 120, 180, and 240 days after transplanting) and four shading environments (20%, 30%, 50%, and 75%), along with the presence or absence of controlled-release fertilization. The following variables were analyzed: plant height, stem diameter, number of leaves, dry mass of leaves, stem, root, and total dry mass, as well as the seedling quality index and foliar levels of macro and micronutrients. The growth and development of açaí seedlings are influenced by the evaluation periods, shade environments, and the use of fertilization. Fertilization with controlled-release fertilizer and environments with30% and 50% shading improved the quality of açaí palm seedlings.
650 $aDemonstration farms
650 $aSeedling production
650 $aShade
650 $aSlow-release fertilizers
650 $aAçaí
650 $aAdubação
650 $aCampo Experimental
650 $aEuterpe Oleracea
650 $aMuda
650 $aProdução
650 $aSombreamento
653 $aAcre
653 $aAmazonia Occidental
653 $aAmazônia Ocidental
653 $aAssai palm
653 $aEmbrapa Acre
653 $aFertilizantes de acción retardada
653 $aGranjas de demostración
653 $aProducción de plántulas
653 $aRio Branco (AC)
653 $aSombra
653 $aWestern Amazon
700 1 $aANDRADE NETO, R. de C.
700 1 $aALMEIDA, U. O. de
700 1 $aSEBIM, J. P. M.
700 1 $aABREU, M. G. P. de
700 1 $aCOSTA, D. A. da
773 $tRevista de Agricultura Neotropical$gv. 10, n. 3, e7325, July/Sept. 2023.
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Registro original: |
Embrapa Acre (CPAF-AC) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
20/02/2017 |
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Data da última atualização: |
20/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
WU, J.; GUAN, K.; HAYEK, M.; RESTREPO-COUPE, N.; WIEDEMANN, K. T.; XU, X.; WEHR, R.; CHRISTOFFERSEN, B. O.; MIAO, G.; SILVA, R. da; ARAUJO, A. C. de; OLIVEIRA JUNIOR, R. C. de; CAMARGO, P. B.; MONSON, R. K.; HUETE, A. R.; SALESKA, S. R. |
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Afiliação: |
JIN WU, University of Arizona; KAIYU GUAN, University of Illinois at Urbana Champaign; MATTHEW HAYEK, Harvard University; NATALIA RESTREPO-COUPE, University of Arizona / University of Technology Sydney; KENIA T. WIEDEMANN, University of Arizona / Harvard University; XIANGTAO XU, Princeton University; RICHARD WEHR, University of Arizona; BRADLEY O. CHRISTOFFERSEN, University of Arizona / Los Alamos National Laboratory; GUOFANG MIAO, University of Illinois at Urbana Champaign / North Carolina State University at Raleigh; RODRIGO DA SILVA, UFOPA; ALESSANDRO CARIOCA DE ARAUJO, CPATU; RAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU; PLINIO B. CAMARGO, CENA/USP; RUSSELL K. MONSON, University of Arizona; ALFREDO R. HUETE, University of Technology Sydney; SCOTT R. SALESKA, University of Arizona. |
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Título: |
Partitioning controls on Amazon forest photosynthesis between environmental and biotic factors at hourly to interannual timescales. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Global Change Biology, v. 23, n. 3, p. 1240-1257, Mar. 2017. |
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DOI: |
10.1111/gcb.13509 |
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Idioma: |
Inglês |
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Conteúdo: |
Gross ecosystem productivity (GEP) in tropical forests varies both with the environment and with biotic changes in photosynthetic infrastructure, but our understanding of the relative effects of these factors across timescales is limited. Here, we used a statistical model to partition the variability of seven years of eddy covariance-derived GEP in a central Amazon evergreen forest into two main causes: variation in environmental drivers (solar radiation, diffuse light fraction, and vapor pressure deficit) that interact with model parameters that govern photosynthesis and biotic variation in canopy photosynthetic light-use efficiency associated with changes in the parameters themselves. Our fitted model was able to explain most of the variability in GEP at hourly (R2 = 0.77) to interannual (R2 = 0.80) timescales. At hourly timescales, we found that 75% of observed GEP variability could be attributed to environmental variability. When aggregating GEP to the longer timescales (daily, monthly, and yearly), however, environmental variation explained progressively less GEP variability: At monthly timescales, it explained only 3%, much less than biotic variation in canopy photosynthetic light-use efficiency, which accounted for 63%. These results challenge modeling approaches that assume GEP is primarily controlled by the environment at both short and long timescales. Our approach distinguishing biotic from environmental variability can help to resolve debates about environmental limitations to tropical forest photosynthesis. For example, we found that biotically regulated canopy photosynthetic light-use efficiency (associated with leaf phenology) increased with sunlight during dry seasons (consistent with light but not water limitation of canopy development) but that realized GEP was nonetheless lower relative to its potential efficiency during dry than wet seasons (consistent with water limitation of photosynthesis in given assemblages of leaves). This work highlights the importance of accounting for differential regulation of GEP at different timescales and of identifying the underlying feedbacks and adaptive mechanisms. MenosGross ecosystem productivity (GEP) in tropical forests varies both with the environment and with biotic changes in photosynthetic infrastructure, but our understanding of the relative effects of these factors across timescales is limited. Here, we used a statistical model to partition the variability of seven years of eddy covariance-derived GEP in a central Amazon evergreen forest into two main causes: variation in environmental drivers (solar radiation, diffuse light fraction, and vapor pressure deficit) that interact with model parameters that govern photosynthesis and biotic variation in canopy photosynthetic light-use efficiency associated with changes in the parameters themselves. Our fitted model was able to explain most of the variability in GEP at hourly (R2 = 0.77) to interannual (R2 = 0.80) timescales. At hourly timescales, we found that 75% of observed GEP variability could be attributed to environmental variability. When aggregating GEP to the longer timescales (daily, monthly, and yearly), however, environmental variation explained progressively less GEP variability: At monthly timescales, it explained only 3%, much less than biotic variation in canopy photosynthetic light-use efficiency, which accounted for 63%. These results challenge modeling approaches that assume GEP is primarily controlled by the environment at both short and long timescales. Our approach distinguishing biotic from environmental variability can help to resolve debates about environmental ... Mostrar Tudo |
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Thesagro: |
Fenologia; Fisiologia; Floresta Tropical; Fotossíntese. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 03197naa a2200361 a 4500
001 2064783
005 2022-05-20
008 2017 bl uuuu u00u1 u #d
024 7 $a10.1111/gcb.13509$2DOI
100 1 $aWU, J.
245 $aPartitioning controls on Amazon forest photosynthesis between environmental and biotic factors at hourly to interannual timescales.$h[electronic resource]
260 $c2017
520 $aGross ecosystem productivity (GEP) in tropical forests varies both with the environment and with biotic changes in photosynthetic infrastructure, but our understanding of the relative effects of these factors across timescales is limited. Here, we used a statistical model to partition the variability of seven years of eddy covariance-derived GEP in a central Amazon evergreen forest into two main causes: variation in environmental drivers (solar radiation, diffuse light fraction, and vapor pressure deficit) that interact with model parameters that govern photosynthesis and biotic variation in canopy photosynthetic light-use efficiency associated with changes in the parameters themselves. Our fitted model was able to explain most of the variability in GEP at hourly (R2 = 0.77) to interannual (R2 = 0.80) timescales. At hourly timescales, we found that 75% of observed GEP variability could be attributed to environmental variability. When aggregating GEP to the longer timescales (daily, monthly, and yearly), however, environmental variation explained progressively less GEP variability: At monthly timescales, it explained only 3%, much less than biotic variation in canopy photosynthetic light-use efficiency, which accounted for 63%. These results challenge modeling approaches that assume GEP is primarily controlled by the environment at both short and long timescales. Our approach distinguishing biotic from environmental variability can help to resolve debates about environmental limitations to tropical forest photosynthesis. For example, we found that biotically regulated canopy photosynthetic light-use efficiency (associated with leaf phenology) increased with sunlight during dry seasons (consistent with light but not water limitation of canopy development) but that realized GEP was nonetheless lower relative to its potential efficiency during dry than wet seasons (consistent with water limitation of photosynthesis in given assemblages of leaves). This work highlights the importance of accounting for differential regulation of GEP at different timescales and of identifying the underlying feedbacks and adaptive mechanisms.
650 $aFenologia
650 $aFisiologia
650 $aFloresta Tropical
650 $aFotossíntese
700 1 $aGUAN, K.
700 1 $aHAYEK, M.
700 1 $aRESTREPO-COUPE, N.
700 1 $aWIEDEMANN, K. T.
700 1 $aXU, X.
700 1 $aWEHR, R.
700 1 $aCHRISTOFFERSEN, B. O.
700 1 $aMIAO, G.
700 1 $aSILVA, R. da
700 1 $aARAUJO, A. C. de
700 1 $aOLIVEIRA JUNIOR, R. C. de
700 1 $aCAMARGO, P. B.
700 1 $aMONSON, R. K.
700 1 $aHUETE, A. R.
700 1 $aSALESKA, S. R.
773 $tGlobal Change Biology$gv. 23, n. 3, p. 1240-1257, Mar. 2017.
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