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Registro Completo |
Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
10/01/2020 |
Data da última atualização: |
06/02/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
HOTT, M. C.; CARVALHO, L. M. T.; ANTURNES, M. A. H.; RESENDE, J. C. de; ROCHA, W. S. D. da. |
Afiliação: |
MARCOS CICARINI HOTT, CNPGL; Luis M. T. Carvalho; Mauro A. H. Antunes; JOAO CESAR DE RESENDE, CNPGL; WADSON SEBASTIAO DUARTE DA ROCHA, CNPGL. |
Título: |
Analysis of grassland degradation in Zona da Mata, MG, Brazil, based on NDVI time series data with the integration of phenological metrics. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Remote Sensing, v. 11, n. 24, article 2956, 2019. |
DOI: |
https://doi.org/10.3390/rs11242956 |
Idioma: |
Inglês |
Conteúdo: |
There is currently a lot of interest in determining the state of Brazilian grasslands. Governmental actions and programs have recently been implemented for grassland recovery in Brazilian states, with the aim of improving production systems and socioeconomic indicators. The aim of this study is to evaluate the vegetative growth, temporal vigor, and long-term scenarios for the grasslands in Zona da Mata, Minas Gerais State, Brazil, by integrating phenological metrics. We used metrics derived from the normalized difference vegetation index (NDVI) time series from moderate resolution imaging spectroradiometer (MODIS) data, which were analyzed in a geographic information system (GIS), using multicriteria analysis, the analytical hierarchy process, and a simplified expert system (ESS). These temporal metrics, i.e., the growth index (GI) for 16-day periods during the growing season; the slope; and the maximum, minimum, and mean for the time series, were integrated to investigate the grassland vegetation conditions and degradation level. The temporal vegetative vigor was successfully described using the rescaled range (R/S statistic) and the Hurst exponent, which, together with the metrics estimated for the full time series, imagery, and field observations, indicated areas undergoing degradation or areas that were inadequately managed (approximately 61.5%). Time series analysis revealed that most grasslands showed low or moderate vegetative vigor over time with long-term persistence due to farming practices associated with burning and overgrazing. A small part of the grasslands showed high and sustainable plant densities (approximately 8.5%). A map legend for grassland management guidelines was developed using the proposed method with remote sensing data, which were applied using GIS software and a field campaign. MenosThere is currently a lot of interest in determining the state of Brazilian grasslands. Governmental actions and programs have recently been implemented for grassland recovery in Brazilian states, with the aim of improving production systems and socioeconomic indicators. The aim of this study is to evaluate the vegetative growth, temporal vigor, and long-term scenarios for the grasslands in Zona da Mata, Minas Gerais State, Brazil, by integrating phenological metrics. We used metrics derived from the normalized difference vegetation index (NDVI) time series from moderate resolution imaging spectroradiometer (MODIS) data, which were analyzed in a geographic information system (GIS), using multicriteria analysis, the analytical hierarchy process, and a simplified expert system (ESS). These temporal metrics, i.e., the growth index (GI) for 16-day periods during the growing season; the slope; and the maximum, minimum, and mean for the time series, were integrated to investigate the grassland vegetation conditions and degradation level. The temporal vegetative vigor was successfully described using the rescaled range (R/S statistic) and the Hurst exponent, which, together with the metrics estimated for the full time series, imagery, and field observations, indicated areas undergoing degradation or areas that were inadequately managed (approximately 61.5%). Time series analysis revealed that most grasslands showed low or moderate vegetative vigor over time with long-term persistenc... Mostrar Tudo |
Palavras-Chave: |
NDVI; Phenological metrics; Time series. |
Thesaurus Nal: |
Degradation; Grasslands; Remote sensing. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/208582/1/Analysis-of-Grassland-Degradation-in-Zona-da-Mata-.pdf
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Marc: |
LEADER 02638naa a2200253 a 4500 001 2118582 005 2024-02-06 008 2019 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.3390/rs11242956$2DOI 100 1 $aHOTT, M. C. 245 $aAnalysis of grassland degradation in Zona da Mata, MG, Brazil, based on NDVI time series data with the integration of phenological metrics.$h[electronic resource] 260 $c2019 520 $aThere is currently a lot of interest in determining the state of Brazilian grasslands. Governmental actions and programs have recently been implemented for grassland recovery in Brazilian states, with the aim of improving production systems and socioeconomic indicators. The aim of this study is to evaluate the vegetative growth, temporal vigor, and long-term scenarios for the grasslands in Zona da Mata, Minas Gerais State, Brazil, by integrating phenological metrics. We used metrics derived from the normalized difference vegetation index (NDVI) time series from moderate resolution imaging spectroradiometer (MODIS) data, which were analyzed in a geographic information system (GIS), using multicriteria analysis, the analytical hierarchy process, and a simplified expert system (ESS). These temporal metrics, i.e., the growth index (GI) for 16-day periods during the growing season; the slope; and the maximum, minimum, and mean for the time series, were integrated to investigate the grassland vegetation conditions and degradation level. The temporal vegetative vigor was successfully described using the rescaled range (R/S statistic) and the Hurst exponent, which, together with the metrics estimated for the full time series, imagery, and field observations, indicated areas undergoing degradation or areas that were inadequately managed (approximately 61.5%). Time series analysis revealed that most grasslands showed low or moderate vegetative vigor over time with long-term persistence due to farming practices associated with burning and overgrazing. A small part of the grasslands showed high and sustainable plant densities (approximately 8.5%). A map legend for grassland management guidelines was developed using the proposed method with remote sensing data, which were applied using GIS software and a field campaign. 650 $aDegradation 650 $aGrasslands 650 $aRemote sensing 653 $aNDVI 653 $aPhenological metrics 653 $aTime series 700 1 $aCARVALHO, L. M. T. 700 1 $aANTURNES, M. A. H. 700 1 $aRESENDE, J. C. de 700 1 $aROCHA, W. S. D. da 773 $tRemote Sensing$gv. 11, n. 24, article 2956, 2019.
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Embrapa Gado de Leite (CNPGL) |
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Biblioteca(s): |
Embrapa Unidades Centrais. |
Data corrente: |
24/11/2016 |
Data da última atualização: |
22/08/2022 |
Autoria: |
ALVES, E. R. de A. |
Afiliação: |
ELISEU ROBERTO DE ANDRADE ALVES, DE/PR. |
Título: |
Tecnologia cristalizada e produtividade total dos fatores. |
Ano de publicação: |
2004 |
Fonte/Imprenta: |
Revista de Economia e Agronegócio, Viçosa, MG, v.2, n.4, p. 547-60, 2004. |
Idioma: |
Português |
Notas: |
Na publicação: Eliseu Alves. |
Conteúdo: |
Caso não haja novo insumo e novo conhecimento de como usar os insumos conhecidos; então o crescimento da produção somente poderá ocorrer em consequência de deslocamento ao longo da fronteira de produção. Desse modo, toda variação da produção será atribuída à variação nas quantidades de insumos usados, ou o conhecimento das quantidades dos insumos fornecerá, imediatamente, o conhecimento das quantidades de produtos. |
Palavras-Chave: |
Produtividade total; Tecnologia não cristalizada. |
Thesagro: |
Agricultura; Produtividade. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/150527/1/Tecnologia-cristalizada-e-produtividade.pdf
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Marc: |
LEADER 01007naa a2200181 a 4500 001 2057006 005 2022-08-22 008 2004 bl uuuu u00u1 u #d 100 1 $aALVES, E. R. de A. 245 $aTecnologia cristalizada e produtividade total dos fatores.$h[electronic resource] 260 $c2004 500 $aNa publicação: Eliseu Alves. 520 $aCaso não haja novo insumo e novo conhecimento de como usar os insumos conhecidos; então o crescimento da produção somente poderá ocorrer em consequência de deslocamento ao longo da fronteira de produção. Desse modo, toda variação da produção será atribuída à variação nas quantidades de insumos usados, ou o conhecimento das quantidades dos insumos fornecerá, imediatamente, o conhecimento das quantidades de produtos. 650 $aAgricultura 650 $aProdutividade 653 $aProdutividade total 653 $aTecnologia não cristalizada 773 $tRevista de Economia e Agronegócio, Viçosa, MG$gv.2, n.4, p. 547-60, 2004.
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