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Registro Completo |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
11/05/2007 |
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Data da última atualização: |
16/01/2023 |
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Autoria: |
RODRÍGUEZ-MORENO, V. M.; PADILLA-RAMÍREZ, J. S.; TISCAREÑO-LÓPEZ, M. |
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Título: |
fAPAR, SR and NDVI to characterize the vegetative and/or phenologic stages of guava (Psidium guajava L.) to forescast its yield. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Acta Horticulturae, Leuven, n. 735, p. 217-221, mar. 2007. |
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Idioma: |
Inglês |
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Notas: |
Edição do Proceedings of the I International Guava Symposium, Lucknow, India, March, 2007. |
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Conteúdo: |
One SPOT satellite image, and field data of 16 guava orchards and 2 blind sites located at Calvillo, Aguascalientes, were used to find if guava's photosynthetic activity rate, could be related with the mean value of spectral indices; the blind sites were a production unit of Agave (Agave tequilana) and the other one an orchard of peach trees (Prunus persica (L)). Two field data collections were performed on March 16 and July 15, 2005. The collected data was: point coordinates, altitude, plantation system and guava 's stage. The spectral indices derived were NDVI (Normalized Difference Vegetation Index), SR (Simple Ratio Vegetation) and fAP AR (fraction of Absorbed Photosynthetically Active Radiation). Consistently fAPAR mean values were more adequate than the other two on describe the phenologic stage of guava where the higher mean value point to "cruise fruit" and the minor to "fruit development"; 0.403 and 0.263, respectively. ForA. tequilana and P. persica (L), the mean values were 0.120 and 0.236, respectively; the lowest mean value for A. tequilana, was strong influenced by the lacking of any vegetative cover between the rows of plantation. These results support that it is feasible to characterize the phenologic stages of guava using the fAP AR index as first option instead of NDVI and SR. The fAP AR image will play a key role to scale the field data to image extension to estimate guava's yield by developing an integration model. |
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Palavras-Chave: |
Caracterização; Cultivo; Dados; GIS; Imagem de satélite; SPOT. |
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Thesagro: |
Goiaba. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02245naa a2200241 a 4500
001 1132692
005 2023-01-16
008 2007 bl uuuu u00u1 u #d
100 1 $aRODRÍGUEZ-MORENO, V. M.
245 $afAPAR, SR and NDVI to characterize the vegetative and/or phenologic stages of guava (Psidium guajava L.) to forescast its yield.
260 $c2007
500 $aEdição do Proceedings of the I International Guava Symposium, Lucknow, India, March, 2007.
520 $aOne SPOT satellite image, and field data of 16 guava orchards and 2 blind sites located at Calvillo, Aguascalientes, were used to find if guava's photosynthetic activity rate, could be related with the mean value of spectral indices; the blind sites were a production unit of Agave (Agave tequilana) and the other one an orchard of peach trees (Prunus persica (L)). Two field data collections were performed on March 16 and July 15, 2005. The collected data was: point coordinates, altitude, plantation system and guava 's stage. The spectral indices derived were NDVI (Normalized Difference Vegetation Index), SR (Simple Ratio Vegetation) and fAP AR (fraction of Absorbed Photosynthetically Active Radiation). Consistently fAPAR mean values were more adequate than the other two on describe the phenologic stage of guava where the higher mean value point to "cruise fruit" and the minor to "fruit development"; 0.403 and 0.263, respectively. ForA. tequilana and P. persica (L), the mean values were 0.120 and 0.236, respectively; the lowest mean value for A. tequilana, was strong influenced by the lacking of any vegetative cover between the rows of plantation. These results support that it is feasible to characterize the phenologic stages of guava using the fAP AR index as first option instead of NDVI and SR. The fAP AR image will play a key role to scale the field data to image extension to estimate guava's yield by developing an integration model.
650 $aGoiaba
653 $aCaracterização
653 $aCultivo
653 $aDados
653 $aGIS
653 $aImagem de satélite
653 $aSPOT
700 1 $aPADILLA-RAMÍREZ, J. S.
700 1 $aTISCAREÑO-LÓPEZ, M.
773 $tActa Horticulturae, Leuven$gn. 735, p. 217-221, mar. 2007.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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