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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
07/12/2020 |
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Data da última atualização: |
13/04/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MACEDO, P. S. M.; OLIVEIRA, P. T. S.; ANTUNES, M. A. H.; DURIGON, V. L.; FIDALGO, E. C. C.; CARVALHO, D. F. de. |
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Afiliação: |
PIETRO SANCHEZ MENEZES MACEDO, UFRRJ; PAULO TARSO SANCHES OLIVEIRA, UFMS; MAURO ANTONIO HOMEM ANTUNES, UFRRJ; VALDEMIR LUCIO DURIGON, UFRRJ; ELAINE CRISTINA CARDOSO FIDALGO, CNPS; DANIEL FONSECA DE CARVALHO, UFRRJ. |
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Título: |
New approach for obtaining the C-factor of RUSLE considering the seasonal effect of rainfalls on vegetation cover. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
International Soil and Water Conservation Research, v. 9, n. 2, p. 207-216, Jun. 2021. |
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DOI: |
https://doi.org/10.1016/j.iswcr.2020.12.001 |
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Idioma: |
Inglês |
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Conteúdo: |
We present a new approach for calculating the C-factor of RUSLE considering the effect of low-reflectance vegetation cover areas on the reduction of the effects on erosion caused by rainfall seasonality. For this, we propose the coefficients Cr2 (rescaled 2) and C-PC (Precipitation Correction), which represent the C-factor, and an adaptation in NDVI calculation, according to the seasonality of precipitation (NDVI-PC). The Cr2 factor is used when there is no seasonal effect of rainfall on vegetation, while the C-PC factor is calculated for localities under the influence of seasonality, from NDVI-PC. The proposed approaches were tested using different satellites images in the Palmares-Ribeirão do Saco watershed, Rio de Janeiro, Brazil. The values of Cr2 and C-PC factors were compared to the Cr factor (rescaled) and to mean values from the literature for different land covers. Our results indicated that the Cr2 factor represents an improvement in accuracy in relation to Cr by considering specific values of the studied area to normalize the data without generalizations. Furthermore, the C-PC factor is able to simulate the effect of seasonality, providing more realistics values of soil loss by the RUSLE as a function of the proportion of area affected by the rainfall seasonality obtained from NDVI-PC. We conclude that both Cr2 and C-PC factors generate values similar of the C-factor observed in the literature, and therefore are able to provide better soil loss estimation than that using the Cr factor. MenosWe present a new approach for calculating the C-factor of RUSLE considering the effect of low-reflectance vegetation cover areas on the reduction of the effects on erosion caused by rainfall seasonality. For this, we propose the coefficients Cr2 (rescaled 2) and C-PC (Precipitation Correction), which represent the C-factor, and an adaptation in NDVI calculation, according to the seasonality of precipitation (NDVI-PC). The Cr2 factor is used when there is no seasonal effect of rainfall on vegetation, while the C-PC factor is calculated for localities under the influence of seasonality, from NDVI-PC. The proposed approaches were tested using different satellites images in the Palmares-Ribeirão do Saco watershed, Rio de Janeiro, Brazil. The values of Cr2 and C-PC factors were compared to the Cr factor (rescaled) and to mean values from the literature for different land covers. Our results indicated that the Cr2 factor represents an improvement in accuracy in relation to Cr by considering specific values of the studied area to normalize the data without generalizations. Furthermore, the C-PC factor is able to simulate the effect of seasonality, providing more realistics values of soil loss by the RUSLE as a function of the proportion of area affected by the rainfall seasonality obtained from NDVI-PC. We conclude that both Cr2 and C-PC factors generate values similar of the C-factor observed in the literature, and therefore are able to provide better soil loss estimation than tha... Mostrar Tudo |
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Palavras-Chave: |
Cobertura da Terra; NDVI. |
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Thesagro: |
Erosão do Solo; Manejo do Solo; Vegetação. |
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Thesaurus Nal: |
Land cover; Soil erosion; Soil management; Vegetation. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02468naa a2200301 a 4500
001 2127717
005 2021-04-13
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.iswcr.2020.12.001$2DOI
100 1 $aMACEDO, P. S. M.
245 $aNew approach for obtaining the C-factor of RUSLE considering the seasonal effect of rainfalls on vegetation cover.$h[electronic resource]
260 $c2021
520 $aWe present a new approach for calculating the C-factor of RUSLE considering the effect of low-reflectance vegetation cover areas on the reduction of the effects on erosion caused by rainfall seasonality. For this, we propose the coefficients Cr2 (rescaled 2) and C-PC (Precipitation Correction), which represent the C-factor, and an adaptation in NDVI calculation, according to the seasonality of precipitation (NDVI-PC). The Cr2 factor is used when there is no seasonal effect of rainfall on vegetation, while the C-PC factor is calculated for localities under the influence of seasonality, from NDVI-PC. The proposed approaches were tested using different satellites images in the Palmares-Ribeirão do Saco watershed, Rio de Janeiro, Brazil. The values of Cr2 and C-PC factors were compared to the Cr factor (rescaled) and to mean values from the literature for different land covers. Our results indicated that the Cr2 factor represents an improvement in accuracy in relation to Cr by considering specific values of the studied area to normalize the data without generalizations. Furthermore, the C-PC factor is able to simulate the effect of seasonality, providing more realistics values of soil loss by the RUSLE as a function of the proportion of area affected by the rainfall seasonality obtained from NDVI-PC. We conclude that both Cr2 and C-PC factors generate values similar of the C-factor observed in the literature, and therefore are able to provide better soil loss estimation than that using the Cr factor.
650 $aLand cover
650 $aSoil erosion
650 $aSoil management
650 $aVegetation
650 $aErosão do Solo
650 $aManejo do Solo
650 $aVegetação
653 $aCobertura da Terra
653 $aNDVI
700 1 $aOLIVEIRA, P. T. S.
700 1 $aANTUNES, M. A. H.
700 1 $aDURIGON, V. L.
700 1 $aFIDALGO, E. C. C.
700 1 $aCARVALHO, D. F. de
773 $tInternational Soil and Water Conservation Research$gv. 9, n. 2, p. 207-216, Jun. 2021.
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Embrapa Solos (CNPS) |
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Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
03/04/2012 |
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Data da última atualização: |
25/07/2017 |
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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: |
POMARI, A. F.; BUENO, A. de F.; BUENO, R. C. O. de F.; MENEZES JUNIOR, A. de O. |
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Afiliação: |
ALINE FARHAT POMARI, USP; ADENEY DE FREITAS BUENO, CNPSO; REGIANE CRISTINA OLIVEIRA DE FREITAS BUENO, FESURV - Rio Verde, GO.; AYRES DE OLIVEIRA MENEZES JUNIOR, UEL. |
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Título: |
Biological Characteristics and thermal requirements of the biological control agent Telenomus remus (Hymenoptera: Platygastridae) reared on eggs of different species of the genus Spodoptera (Lepidoptera: Noctuidae). |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Annals of Entomological Society of America, College Park, v. 105, n. 1, p. 73-81, 2012. |
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DOI: |
dx.doi.org/10.1603/AN11115 |
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Idioma: |
Inglês |
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Conteúdo: |
The biological characteristics of Telenomus remus Nixon, 1937 (Hymenoptera: Platygastridae) on eggs of Spodoptera albula (Walker, 1857); S. cosmioides Walker 1858, S. eridania (Cramer, 1782); and S. frugiperda (Smith, 1797) (Lepidoptera: Noctuidae) were evaluated under different temperatures (19, 22, 25, 28, 31, and 34ºC + - 1ºC). The duration of the T. remus egg-to-adult period on eggs of all four Spodoptera species and the longevity of adults of T. remus were both inversely proportional to the increase in temperature. Parasitoid emergence was higher than 80% at temperatures from 19 to 28º C when the parasitoid was reared on eggs of S. eridania and S. frugiperda. Differently, when the parasitoid was reared on eggs of S. albula and S. cosmioides, T. remus emergence at rates of 80% or higher just occurred from 22 to 25º C and at 22º C, respectively. At 34º C, this parameter was lower than 30% for T. remus reared in all hosts. The sex ratio was 64Ð86% females, except for T. remus in S. cosmioides eggs at 34º C, in which temperature it was 39%. The estimated thermal requirements of T. remus, for the thermal constant (K) and the base temperature (Tbase), were: 125.39 DD and 15.139º C; 125.56 DD and 14.912º C; 142.98 DD and 14.197º C; and 149.16 DD and 13.846º C, for S. cosmioides, S. frugiperda, S. albula, and S. eridania, respectively. In general, T. remus showed good parasitism potential on all the hosts, although eggs of S. frugiperda, S. eridania, and S. albula proved to be the most suitable for mass rearing of T. remus in the laboratory. Eggs of S. cosmioides are less suitable because of the lower parasitoid emergence observed at most of the temperatures with exception of 22º C. MenosThe biological characteristics of Telenomus remus Nixon, 1937 (Hymenoptera: Platygastridae) on eggs of Spodoptera albula (Walker, 1857); S. cosmioides Walker 1858, S. eridania (Cramer, 1782); and S. frugiperda (Smith, 1797) (Lepidoptera: Noctuidae) were evaluated under different temperatures (19, 22, 25, 28, 31, and 34ºC + - 1ºC). The duration of the T. remus egg-to-adult period on eggs of all four Spodoptera species and the longevity of adults of T. remus were both inversely proportional to the increase in temperature. Parasitoid emergence was higher than 80% at temperatures from 19 to 28º C when the parasitoid was reared on eggs of S. eridania and S. frugiperda. Differently, when the parasitoid was reared on eggs of S. albula and S. cosmioides, T. remus emergence at rates of 80% or higher just occurred from 22 to 25º C and at 22º C, respectively. At 34º C, this parameter was lower than 30% for T. remus reared in all hosts. The sex ratio was 64Ð86% females, except for T. remus in S. cosmioides eggs at 34º C, in which temperature it was 39%. The estimated thermal requirements of T. remus, for the thermal constant (K) and the base temperature (Tbase), were: 125.39 DD and 15.139º C; 125.56 DD and 14.912º C; 142.98 DD and 14.197º C; and 149.16 DD and 13.846º C, for S. cosmioides, S. frugiperda, S. albula, and S. eridania, respectively. In general, T. remus showed good parasitism potential on all the hosts, although eggs of S. frugiperda, S. eridania, and S. albula proved to be ... Mostrar Tudo |
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Thesagro: |
Controle biológico; Praga de planta. |
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Thesaurus NAL: |
Biological control; Insect control; Plant pests. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02568naa a2200229 a 4500
001 1921462
005 2017-07-25
008 2012 bl uuuu u00u1 u #d
024 7 $adx.doi.org/10.1603/AN11115$2DOI
100 1 $aPOMARI, A. F.
245 $aBiological Characteristics and thermal requirements of the biological control agent Telenomus remus (Hymenoptera$bPlatygastridae) reared on eggs of different species of the genus Spodoptera (Lepidoptera: Noctuidae).
260 $c2012
520 $aThe biological characteristics of Telenomus remus Nixon, 1937 (Hymenoptera: Platygastridae) on eggs of Spodoptera albula (Walker, 1857); S. cosmioides Walker 1858, S. eridania (Cramer, 1782); and S. frugiperda (Smith, 1797) (Lepidoptera: Noctuidae) were evaluated under different temperatures (19, 22, 25, 28, 31, and 34ºC + - 1ºC). The duration of the T. remus egg-to-adult period on eggs of all four Spodoptera species and the longevity of adults of T. remus were both inversely proportional to the increase in temperature. Parasitoid emergence was higher than 80% at temperatures from 19 to 28º C when the parasitoid was reared on eggs of S. eridania and S. frugiperda. Differently, when the parasitoid was reared on eggs of S. albula and S. cosmioides, T. remus emergence at rates of 80% or higher just occurred from 22 to 25º C and at 22º C, respectively. At 34º C, this parameter was lower than 30% for T. remus reared in all hosts. The sex ratio was 64Ð86% females, except for T. remus in S. cosmioides eggs at 34º C, in which temperature it was 39%. The estimated thermal requirements of T. remus, for the thermal constant (K) and the base temperature (Tbase), were: 125.39 DD and 15.139º C; 125.56 DD and 14.912º C; 142.98 DD and 14.197º C; and 149.16 DD and 13.846º C, for S. cosmioides, S. frugiperda, S. albula, and S. eridania, respectively. In general, T. remus showed good parasitism potential on all the hosts, although eggs of S. frugiperda, S. eridania, and S. albula proved to be the most suitable for mass rearing of T. remus in the laboratory. Eggs of S. cosmioides are less suitable because of the lower parasitoid emergence observed at most of the temperatures with exception of 22º C.
650 $aBiological control
650 $aInsect control
650 $aPlant pests
650 $aControle biológico
650 $aPraga de planta
700 1 $aBUENO, A. de F.
700 1 $aBUENO, R. C. O. de F.
700 1 $aMENEZES JUNIOR, A. de O.
773 $tAnnals of Entomological Society of America, College Park$gv. 105, n. 1, p. 73-81, 2012.
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