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Registro Completo |
Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
19/09/2007 |
Data da última atualização: |
11/01/2024 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
AGUIAR, P. A. A.; SCHAFFERT, R. E. |
Afiliação: |
PAULO ANSELMO ANDRADE AGUIAR, CPATSA; REBERT R. SCHAFFERT, EMBRAPA. |
Título: |
Ensaio nacional de sorgo granífero. |
Ano de publicação: |
1977 |
Fonte/Imprenta: |
In: EMPRESA BRASILEIRA DE PESQUISA AGROPECUÁRIA. Centro de Pesquisa Agropecuária do Trópico Semi-Árido. Resumo de atividades de pesquisa. Petrolina, 1977. |
Volume: |
v. 1 |
Páginas: |
p. 24-25. |
Idioma: |
Português |
Conteúdo: |
O sorgo ê uma cultura relativamente nova no Brasil, necessitando por isso informações no sentiGo de se conseguir um zoneamento edafo-c1imático-genético. Os híbridos e variedades comercia1izadas são alguns materiais genéticos que podem ser utilizados para se obter tal zoneamento. Além disso, há necessidade de se determinar o potencial dos híbridos de sorgo comercialmente disponíveis~ visando a orientação dos agricultores e mesmo das companhias produtoras~ sobre os melhores híbridos para cada região. |
Palavras-Chave: |
Manejo de cultura; Sorghum. |
Thesagro: |
Sorgo; Sorgo Granífero. |
Thesaurus Nal: |
Grain sorghum. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/140510/1/Digitalizar0053.pdf
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Marc: |
LEADER 01146nam a2200205 a 4500 001 1158615 005 2024-01-11 008 1977 bl uuuu u00u1 u #d 100 1 $aAGUIAR, P. A. A. 245 $aEnsaio nacional de sorgo granífero. 260 $aIn: EMPRESA BRASILEIRA DE PESQUISA AGROPECUÁRIA. Centro de Pesquisa Agropecuária do Trópico Semi-Árido. Resumo de atividades de pesquisa. Petrolina$c1977 300 $ap. 24-25. v. 1 490 $vv. 1 520 $aO sorgo ê uma cultura relativamente nova no Brasil, necessitando por isso informações no sentiGo de se conseguir um zoneamento edafo-c1imático-genético. Os híbridos e variedades comercia1izadas são alguns materiais genéticos que podem ser utilizados para se obter tal zoneamento. Além disso, há necessidade de se determinar o potencial dos híbridos de sorgo comercialmente disponíveis~ visando a orientação dos agricultores e mesmo das companhias produtoras~ sobre os melhores híbridos para cada região. 650 $aGrain sorghum 650 $aSorgo 650 $aSorgo Granífero 653 $aManejo de cultura 653 $aSorghum 700 1 $aSCHAFFERT, R. E.
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Embrapa Semiárido (CPATSA) |
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Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
17/09/2021 |
Data da última atualização: |
09/01/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
Autoria: |
LUZ, L. R.; GIONGO, V.; SANTOS, A. M. dos; LOPES, R. J. de C.; LIMA JÚNIOR, C. de. |
Afiliação: |
LEUDIANE RODRIGUES LUZ; VANDERLISE GIONGO, CPATSA; ANTONIO MARCOS DOS SANTOS; RODRIGO JOSÉ DE CARVALHO LOPES; CLAUDEMIRO DE LIMA JÚNIOR. |
Título: |
Biomass and vegetation index by remote sensing in different caatinga forest areas. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
Ciência Rural, Santa Maria, v. 52, n. 2, e20201104, 2022. |
DOI: |
10.1590/0103-8478cr20201104 |
Idioma: |
Inglês |
Conteúdo: |
Continued unsustainable exploitation of natural resources promotes environmental degradation and threatens the preservation of dry forests around the world. This situation exposes the fragility and the necessity to study landscape transformations. In addition, it is necessary to consider the biomass quantity and to establish strategies to monitor natural and anthropic disturbances. Thus, this research analyzed the relationship between vegetation index and the estimated biomass using allometric equations in different Brazilian caatinga forest areas from satellite images. This procedure is performed by estimating the biomass from 9 dry tropical forest fragments using allometric equations. Area delimitations were obtained from the Embrapa collection of dendrometric data collected in the period between 2011 and 2012. Spectral variables were obtained from the orthorectified images of the RapidEye satellite. The aboveground biomass ranged from 6.88 to 123.82 Mg.ha-1. SAVI values were L = 1 and L = 0.5, while NDVI and EVI ranged from 0.1835 to 0.4294, 0.2197 to 0.5019, 0.3622 to 0.7584, and 0.0987 to 0.3169, respectively. Relationships among the estimated biomass and the vegetation indexes were moderate, with correlation coefficients (Rs) varying between 0.64 and 0.58. The best adjusted equation was the SAVI equation, for which the coefficient of determination was R2 = 0.50, R2 aj = 0.49, RMSE = 17.18 Mg.ha-1 and mean absolute error of prediction (MAE) = 14.07 Mg.ha-1, confirming the importance of the Savi index in estimating the caatinga aboveground biomass. MenosContinued unsustainable exploitation of natural resources promotes environmental degradation and threatens the preservation of dry forests around the world. This situation exposes the fragility and the necessity to study landscape transformations. In addition, it is necessary to consider the biomass quantity and to establish strategies to monitor natural and anthropic disturbances. Thus, this research analyzed the relationship between vegetation index and the estimated biomass using allometric equations in different Brazilian caatinga forest areas from satellite images. This procedure is performed by estimating the biomass from 9 dry tropical forest fragments using allometric equations. Area delimitations were obtained from the Embrapa collection of dendrometric data collected in the period between 2011 and 2012. Spectral variables were obtained from the orthorectified images of the RapidEye satellite. The aboveground biomass ranged from 6.88 to 123.82 Mg.ha-1. SAVI values were L = 1 and L = 0.5, while NDVI and EVI ranged from 0.1835 to 0.4294, 0.2197 to 0.5019, 0.3622 to 0.7584, and 0.0987 to 0.3169, respectively. Relationships among the estimated biomass and the vegetation indexes were moderate, with correlation coefficients (Rs) varying between 0.64 and 0.58. The best adjusted equation was the SAVI equation, for which the coefficient of determination was R2 = 0.50, R2 aj = 0.49, RMSE = 17.18 Mg.ha-1 and mean absolute error of prediction (MAE) = 14.07 Mg.ha-1, confirming t... Mostrar Tudo |
Palavras-Chave: |
Energia renovável; Florestas secas; Modelagem; Snsoriamento remoto. |
Thesagro: |
Biomassa; Caatinga; Floresta; Vegetação; Vegetação Nativa. |
Thesaurus NAL: |
Biomass; Dry forests; Microbial biomass; Remote sensing; Renewable energy sources; Structural equation modeling. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/226135/1/Biomass-and-vegetation-index-by-remote-sensing-2022.pdf
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Marc: |
LEADER 02613naa a2200361 a 4500 001 2134527 005 2023-01-09 008 2022 bl uuuu u00u1 u #d 024 7 $a10.1590/0103-8478cr20201104$2DOI 100 1 $aLUZ, L. R. 245 $aBiomass and vegetation index by remote sensing in different caatinga forest areas.$h[electronic resource] 260 $c2022 520 $aContinued unsustainable exploitation of natural resources promotes environmental degradation and threatens the preservation of dry forests around the world. This situation exposes the fragility and the necessity to study landscape transformations. In addition, it is necessary to consider the biomass quantity and to establish strategies to monitor natural and anthropic disturbances. Thus, this research analyzed the relationship between vegetation index and the estimated biomass using allometric equations in different Brazilian caatinga forest areas from satellite images. This procedure is performed by estimating the biomass from 9 dry tropical forest fragments using allometric equations. Area delimitations were obtained from the Embrapa collection of dendrometric data collected in the period between 2011 and 2012. Spectral variables were obtained from the orthorectified images of the RapidEye satellite. The aboveground biomass ranged from 6.88 to 123.82 Mg.ha-1. SAVI values were L = 1 and L = 0.5, while NDVI and EVI ranged from 0.1835 to 0.4294, 0.2197 to 0.5019, 0.3622 to 0.7584, and 0.0987 to 0.3169, respectively. Relationships among the estimated biomass and the vegetation indexes were moderate, with correlation coefficients (Rs) varying between 0.64 and 0.58. The best adjusted equation was the SAVI equation, for which the coefficient of determination was R2 = 0.50, R2 aj = 0.49, RMSE = 17.18 Mg.ha-1 and mean absolute error of prediction (MAE) = 14.07 Mg.ha-1, confirming the importance of the Savi index in estimating the caatinga aboveground biomass. 650 $aBiomass 650 $aDry forests 650 $aMicrobial biomass 650 $aRemote sensing 650 $aRenewable energy sources 650 $aStructural equation modeling 650 $aBiomassa 650 $aCaatinga 650 $aFloresta 650 $aVegetação 650 $aVegetação Nativa 653 $aEnergia renovável 653 $aFlorestas secas 653 $aModelagem 653 $aSnsoriamento remoto 700 1 $aGIONGO, V. 700 1 $aSANTOS, A. M. dos 700 1 $aLOPES, R. J. de C. 700 1 $aLIMA JÚNIOR, C. de 773 $tCiência Rural, Santa Maria$gv. 52, n. 2, e20201104, 2022.
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