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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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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 |
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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: |
LEADER 02594naa a2200289 a 4500
001 1974172
005 2013-12-20
008 2013 bl uuuu u00u1 u #d
024 7 $a10.14355/ijrsa.2013.0304.04$2DOI
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
700 1 $aMOURA, M. S. B. de
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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Registro original: |
Embrapa Semiárido (CPATSA) |
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Origem |
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Classificação |
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Registro |
Volume |
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Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
21/12/2011 |
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Data da última atualização: |
31/10/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
BALBINOT JUNIOR, A. A.; VEIGA, M. da; MORAES, A. de; PELISSARI, A.; MAFRA, A. L.; PICCOLLA, C. D. |
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Afiliação: |
ALVADI ANTONIO BALBINOT JUNIOR, CNPSO; MILTON DA VEIGA, EPAGRI; ANIBAL DE MORAES, UFPR; ADELINO PELISSARI, UFPR; ÁLVARO LUIZ MAFRA, UDESC; CRISTIANO DELA PICCOLLA, UDESC. |
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Título: |
Winter pasture and cover crops and their effects on soil and summer grain crops. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 46, n. 10, p. 1357-1363, out. 2011. |
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Idioma: |
Inglês |
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Conteúdo: |
O objetivo deste trabalho foi avaliar o efeito de usos da terra no inverno na quantidade de palha remanescente, nas características físicas do solo e na produção de grãos das culturas estivais de milho, feijão e soja, cultivadas em sucessão. O experimento foi conduzido na região Planalto Norte de Santa Catarina, de maio de 2006 a abril de 2010. Foram avaliados cinco usos da terra no inverno: consórcio de aveia?preta + azevém + ervilhaca, sem pastejo e sem adubação nitrogenada (consórcio cobertura); o mesmo consórcio, com pastejo e 100 kg ha?1 de nitrogênio (N) por ano em cobertura (pastagem com N); o mesmo consórcio, com pastejo e sem adubação nitrogenada (pastagem sem N); nabo forrageiro, sem pastejo e sem adubação nitrogenada (nabo forrageiro); e vegetação natural, sem pastejo e sem adubação nitrogenada (pousio). O consórcio cobertura proporciona maior quantidade de biomassa para o sistema e, consequentemente, maior acúmulo de carbono orgânico total e particulado na camada superficial do solo. No entanto, as formas de uso da terra no inverno não alteram significativamente as características do solo relacionadas à compactação, nem a produtividade de grãos das culturas de milho, feijão e soja, cultivadas em sucessão. Winter pasture and cover crops and their effects on soil and summer grain crops. The objective of this work was to evaluate the effect of winter land use on the amount of residual straw, the physical soil properties and grain yields of maize, common bean and soybean summer crops cultivated in succession. The experiment was carried out in the North Plateau of Santa Catarina state, Brazil, from May 2006 to April 2010. Five strategies of land use in winter were evaluated: intercropping with black oat + ryegrass + vetch, without grazing and nitrogen (N) fertilization (intercropping cover); the same intercropping, with grazing and 100 kg ha?1 of N per year topdressing (pasture with N); the same intercropping, with grazing and without nitrogen fertilization (pasture without N); oilseed radish, without grazing and nitrogen fertilization (oilseed radish); and natural vegetation, without grazing and nitrogen fertilization (fallow). Intercropping cover produces a greater amount of biomass in the system and, consequently, a greater accumulation of total and particulate organic carbon on the surface soil layer. However, land use in winter does not significantly affect soil physical properties related to soil compaction, nor the grain yield of maize, soybean and common bean cultivated in succession. MenosO objetivo deste trabalho foi avaliar o efeito de usos da terra no inverno na quantidade de palha remanescente, nas características físicas do solo e na produção de grãos das culturas estivais de milho, feijão e soja, cultivadas em sucessão. O experimento foi conduzido na região Planalto Norte de Santa Catarina, de maio de 2006 a abril de 2010. Foram avaliados cinco usos da terra no inverno: consórcio de aveia?preta + azevém + ervilhaca, sem pastejo e sem adubação nitrogenada (consórcio cobertura); o mesmo consórcio, com pastejo e 100 kg ha?1 de nitrogênio (N) por ano em cobertura (pastagem com N); o mesmo consórcio, com pastejo e sem adubação nitrogenada (pastagem sem N); nabo forrageiro, sem pastejo e sem adubação nitrogenada (nabo forrageiro); e vegetação natural, sem pastejo e sem adubação nitrogenada (pousio). O consórcio cobertura proporciona maior quantidade de biomassa para o sistema e, consequentemente, maior acúmulo de carbono orgânico total e particulado na camada superficial do solo. No entanto, as formas de uso da terra no inverno não alteram significativamente as características do solo relacionadas à compactação, nem a produtividade de grãos das culturas de milho, feijão e soja, cultivadas em sucessão. Winter pasture and cover crops and their effects on soil and summer grain crops. The objective of this work was to evaluate the effect of winter land use on the amount of residual straw, the physical soil properties and grain yields of maize, common bean and soy... Mostrar Tudo |
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Thesagro: |
Agrossilvicultura; Planta de cobertura. |
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Thesaurus NAL: |
Agroforestry; Cover crops. |
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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/item/51101/1/winter.pdf
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Marc: |
LEADER 03257naa a2200229 a 4500
001 1910617
005 2017-10-31
008 2011 bl uuuu u00u1 u #d
100 1 $aBALBINOT JUNIOR, A. A.
245 $aWinter pasture and cover crops and their effects on soil and summer grain crops.
260 $c2011
520 $aO objetivo deste trabalho foi avaliar o efeito de usos da terra no inverno na quantidade de palha remanescente, nas características físicas do solo e na produção de grãos das culturas estivais de milho, feijão e soja, cultivadas em sucessão. O experimento foi conduzido na região Planalto Norte de Santa Catarina, de maio de 2006 a abril de 2010. Foram avaliados cinco usos da terra no inverno: consórcio de aveia?preta + azevém + ervilhaca, sem pastejo e sem adubação nitrogenada (consórcio cobertura); o mesmo consórcio, com pastejo e 100 kg ha?1 de nitrogênio (N) por ano em cobertura (pastagem com N); o mesmo consórcio, com pastejo e sem adubação nitrogenada (pastagem sem N); nabo forrageiro, sem pastejo e sem adubação nitrogenada (nabo forrageiro); e vegetação natural, sem pastejo e sem adubação nitrogenada (pousio). O consórcio cobertura proporciona maior quantidade de biomassa para o sistema e, consequentemente, maior acúmulo de carbono orgânico total e particulado na camada superficial do solo. No entanto, as formas de uso da terra no inverno não alteram significativamente as características do solo relacionadas à compactação, nem a produtividade de grãos das culturas de milho, feijão e soja, cultivadas em sucessão. Winter pasture and cover crops and their effects on soil and summer grain crops. The objective of this work was to evaluate the effect of winter land use on the amount of residual straw, the physical soil properties and grain yields of maize, common bean and soybean summer crops cultivated in succession. The experiment was carried out in the North Plateau of Santa Catarina state, Brazil, from May 2006 to April 2010. Five strategies of land use in winter were evaluated: intercropping with black oat + ryegrass + vetch, without grazing and nitrogen (N) fertilization (intercropping cover); the same intercropping, with grazing and 100 kg ha?1 of N per year topdressing (pasture with N); the same intercropping, with grazing and without nitrogen fertilization (pasture without N); oilseed radish, without grazing and nitrogen fertilization (oilseed radish); and natural vegetation, without grazing and nitrogen fertilization (fallow). Intercropping cover produces a greater amount of biomass in the system and, consequently, a greater accumulation of total and particulate organic carbon on the surface soil layer. However, land use in winter does not significantly affect soil physical properties related to soil compaction, nor the grain yield of maize, soybean and common bean cultivated in succession.
650 $aAgroforestry
650 $aCover crops
650 $aAgrossilvicultura
650 $aPlanta de cobertura
700 1 $aVEIGA, M. da
700 1 $aMORAES, A. de
700 1 $aPELISSARI, A.
700 1 $aMAFRA, A. L.
700 1 $aPICCOLLA, C. D.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 46, n. 10, p. 1357-1363, out. 2011.
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