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| Registros recuperados : 189 | |
| 25. |  | SOUZA, L. S. B. de; MOURA, M. S. B. de; SEDIYAMA, G. C.; SILVA, T. G. F. da. Balanço de energia e controle biofísico da evapotranspiração na Caatinga em condições de seca intensa. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 50, n. 8, p. 627-636, ago. 2015| Biblioteca(s): Embrapa Semiárido; Embrapa Unidades Centrais. |
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| 27. | | BRANDÃO. E. O.; MOURA, M. S. B. de; SOARES, J. M.; SOUZA, L. S. B.; SILVA, T. G. F. da. Cobertura plástica da videira: evolução do crescimento de ramos e cachos e da área foliar no Submédio São Francisco. In: CONGRESSO BRASILEIRO DE ENGENHARIA AGRICOLA, 38., 2009, Juazeiro, Petrolina. Planejamento da bacia hidrográfica e o desenvolvimento da agricultura: anais. Juazeiro, Petrolina: UNIVASF: Embrapa Semiárido: CEFET: SBEA, 2009. 1 CD-ROM.| Biblioteca(s): Embrapa Semiárido. |
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| 32. | | CARVALHO, H. F. de S.; MOURA, M. S. B. de; SILVA, T. G. F. da; RODRIGUES, C. T. A. Microclima em áreas de Caatinga preservada e cana-de-açúcar irrigada no Semiárido brasileiro. In: CONGRESSO BRASILEIRO DE AGROMETEOROLOGIA, 20; SIMPÓSIO DE MUDANÇAS CLIMÁTICAS E DESERTIFICAÇÃO NO SEMIÁRIDO BRASILEIRO, 5., 2017, Juazeiro, BA. A agrometeorologia na solução de problemas multiescala: anais. Petrolina: Embrapa Semiárido; Juazeiro: UNIVASF; Campinas: Sociedade Brasileira de Agrometeorologia, 2017. 1 CD-ROM.| Biblioteca(s): Embrapa Semiárido. |
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| 34. | | MOURA, M. S. B. de; SILVA, T. G. F. da; SOUZA, L. S. B. de; TAURA, T. A. Onde e quando plantar palma-forrageira. In: VOLTOLINI, T. V.; OLIVEIRA, A. R. de; SALVIANO, A. M.; MOURA, M. S. B. de; ARAÚJO, G. G. L. de (ed.). Sistema de produção de palma-forrageira para o Estado da Paraíba. Petrolina: Embrapa Semiárido, 2022. (Embrapa Semiárido. Sistema de Produção, 14).| Biblioteca(s): Embrapa Semiárido. |
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| 37. | | GALVÍNCIO, J. D.; MOURA, M. S. B. de; SILVA, T. G. F da; SILVA, B. B. da; NAUE, C. R. Relationship between canopy and leaf spectral response in Savanna. Revista Brasileira de Geografia Física, Recife, v. 6, n. 2, p. 341-355, 2013.| Biblioteca(s): Embrapa Semiárido. |
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| 38. | | RODRIGUES, G. D. da S.; SOUZA, L. S. B. de; MOURA, M. S. B. de; SILVA, T. G. F. da. Reflectância das culturas do milho e feijão-caupi em sistemas de plantio exclusivo e consorciado. In: JORNADA DE INICIAÇÃO CIENTÍFICA DA EMBRAPA SEMIÁRIDO, 7.; JORNADA DE INICIAÇÃO CIENTÍFICA DA FACEPE/UNIVASF, 1., 2012, Petrolina. Anais... Petrolina: Embrapa Semiárido, 2012. p. 233-239. 1 CD-ROM. (Embrapa Semiárido. Documentos, 248).| Biblioteca(s): Embrapa Semiárido. |
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| 40. | | SOUZA, L. S. B. de; MOURA, M. S. B. de; SEDIYMA, G. C.; SILVA, T. G. F. da. Requerimento hídrico e coeficiente de cultura do milho e feijão-caupi em sistemas exclusivo e consorciado. Revista Caatinga, Mossoró, v. 28, n. 4, p. 151-160, out./dez., 2015.| Biblioteca(s): Embrapa Semiárido. |
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| Registros recuperados : 189 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
17/12/2013 |
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Data da última atualização: |
20/12/2013 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
C - 0 |
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Autoria: |
GALVÍNCIO, J. D.; MOURA, M. S. B. de; SILVA, T. G. F. da; SILVA, B. B. da; NAUE, C. R. |
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Afiliação: |
JOSICLÊDA DOMICIANO GALVÍNCIO; MAGNA SOELMA BESERRA DE MOURA, CPATSA; THIERES GEORGE FREIRE DA SILVA; BERNARDO BARBOSA DA SILVA; CARINE ROSA NAUE. |
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Título: |
LAI Improved to dry forest in Semiarid of the Brazil. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
International Journal of Remote Sensing Applications, v. 3, n. 4, p. 193-202, dec. 2013. |
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DOI: |
10.14355/ijrsa.2013.0304.04 |
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Idioma: |
Inglês |
|
Conteúdo: |
Savannas are globally important ecosystems of great significance to human economies. Savannas exist in water-limited regions which forces tree canopies open and heterogeneous. The open canopy structure allows grass to co-dominate in the savannas by occupying different niches in space and time. Leaf area index (LAI) and fraction of photosynthetically active radiation absorbed by vegetation (FPAR) characterize vegetation canopy functioning and energy absorption capacity. LAI and FPAR are key parameters in most ecosystem productivity models and global models of climate, hydrology, biogeochemistry and ecology. Given the above, this study aimed to develop an equation of LAI calibrated by savannah in semiarid northeastern Brazil and proposed a model to better estimate the LAI for dry forest, such as the savanna (Caatinga). The model developed in this study may be used to improve the estimates of Leaf Area Index [LAI] in dry forest with NDVI. One model for savanna-specific of leaf area index (LAI) has been developed. The use of S Curve statistical methods to calibrate the leaf area index (LAI) proved to be an efficient method. The model development gives good results in most of the LAI range known for Caatinga stands in Northeast of Brazil. The Root Mean Square Error (RMSE) calculated on an independent LAI dataset was 0.10, which is about 6% of the average measured LAI. This method offers a simple and operational alternative to application of complex and computationally intensive techniques, and could be used to design other species-specific LAIs. This study reinforces the importance of developing models to better estimate the LAI in different ecosystems since there are no similarities of the LAI between dry and humid climate. MenosSavannas are globally important ecosystems of great significance to human economies. Savannas exist in water-limited regions which forces tree canopies open and heterogeneous. The open canopy structure allows grass to co-dominate in the savannas by occupying different niches in space and time. Leaf area index (LAI) and fraction of photosynthetically active radiation absorbed by vegetation (FPAR) characterize vegetation canopy functioning and energy absorption capacity. LAI and FPAR are key parameters in most ecosystem productivity models and global models of climate, hydrology, biogeochemistry and ecology. Given the above, this study aimed to develop an equation of LAI calibrated by savannah in semiarid northeastern Brazil and proposed a model to better estimate the LAI for dry forest, such as the savanna (Caatinga). The model developed in this study may be used to improve the estimates of Leaf Area Index [LAI] in dry forest with NDVI. One model for savanna-specific of leaf area index (LAI) has been developed. The use of S Curve statistical methods to calibrate the leaf area index (LAI) proved to be an efficient method. The model development gives good results in most of the LAI range known for Caatinga stands in Northeast of Brazil. The Root Mean Square Error (RMSE) calculated on an independent LAI dataset was 0.10, which is about 6% of the average measured LAI. This method offers a simple and operational alternative to application of complex and computationally intensive t... Mostrar Tudo |
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Palavras-Chave: |
Ecossistemas secos; Fieldspec; LAI; Modelo de desenvolvimento; Natural resource; Savanas. |
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Thesagro: |
Caatinga; Recurso natural; Sensoriamento remoto. |
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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/94197/1/Magna-3.pdf
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|
Marc: |
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100 1 $aGALVÍNCIO, J. D.
245 $aLAI Improved to dry forest in Semiarid of the Brazil.$h[electronic resource]
260 $c2013
520 $aSavannas are globally important ecosystems of great significance to human economies. Savannas exist in water-limited regions which forces tree canopies open and heterogeneous. The open canopy structure allows grass to co-dominate in the savannas by occupying different niches in space and time. Leaf area index (LAI) and fraction of photosynthetically active radiation absorbed by vegetation (FPAR) characterize vegetation canopy functioning and energy absorption capacity. LAI and FPAR are key parameters in most ecosystem productivity models and global models of climate, hydrology, biogeochemistry and ecology. Given the above, this study aimed to develop an equation of LAI calibrated by savannah in semiarid northeastern Brazil and proposed a model to better estimate the LAI for dry forest, such as the savanna (Caatinga). The model developed in this study may be used to improve the estimates of Leaf Area Index [LAI] in dry forest with NDVI. One model for savanna-specific of leaf area index (LAI) has been developed. The use of S Curve statistical methods to calibrate the leaf area index (LAI) proved to be an efficient method. The model development gives good results in most of the LAI range known for Caatinga stands in Northeast of Brazil. The Root Mean Square Error (RMSE) calculated on an independent LAI dataset was 0.10, which is about 6% of the average measured LAI. This method offers a simple and operational alternative to application of complex and computationally intensive techniques, and could be used to design other species-specific LAIs. This study reinforces the importance of developing models to better estimate the LAI in different ecosystems since there are no similarities of the LAI between dry and humid climate.
650 $aCaatinga
650 $aRecurso natural
650 $aSensoriamento remoto
653 $aEcossistemas secos
653 $aFieldspec
653 $aLAI
653 $aModelo de desenvolvimento
653 $aNatural resource
653 $aSavanas
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700 1 $aSILVA, T. G. F. da
700 1 $aSILVA, B. B. da
700 1 $aNAUE, C. R.
773 $tInternational Journal of Remote Sensing Applications$gv. 3, n. 4, p. 193-202, dec. 2013.
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Embrapa Semiárido (CPATSA) |
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