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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
05/03/2009 |
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Data da última atualização: |
05/03/2009 |
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Autoria: |
LOPES, J. C.; MATHEUS, M. T.; CORRÊA, N. B.; SILVA, D. P. da. |
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Título: |
Germinação de sementes de embiruçu (Pseudobombax grandiflorum (Cav.) A. Robyns) em diferentes estágios de maturação e substratos. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Floresta, Curitiba, v. 38, n. 2, p. 331-337, abr./jun. 2008. |
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Idioma: |
Português |
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Conteúdo: |
O objetivo deste trabalho foi avaliar a germinação de sementes de embiruçu (Pseudobombax
grandiflorum (Cav.) A. Robyns), colhidas em vários estádios de maturação, utilizando-se diferentes
substratos. Os estádios avaliados foram 30, 60 e 80 dias após a antese (DAA) e os substratos
utilizados foram papel, areia e vermiculita. O delineamento experimental utilizado foi o inteiramente
casualizado (DIC), num esquema fatorial 3 x 3 (três períodos de maturação x três substratos), com
quatro repetições de 25 sementes, sendo a comparação entre as médias dos tratamentos efetuada pelo
teste de Tukey (a = 0,05). A vermiculita favoreceu maior porcentagem e velocidade de germinação
das sementes com 60 DAA, enquanto sementes com 80 DAA germinaram igualmente nos três
substratos, embora a areia tenha proporcionado maior velocidade de germinação nesse estádio. |
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Palavras-Chave: |
Espécie florestal; Formação de sementes; Pseudobombax grandiflorum; Teor de água. |
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Thesaurus Nal: |
vigor. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01558naa a2200217 a 4500
001 1315671
005 2009-03-05
008 2008 bl uuuu u00u1 u #d
100 1 $aLOPES, J. C.
245 $aGerminação de sementes de embiruçu (Pseudobombax grandiflorum (Cav.) A. Robyns) em diferentes estágios de maturação e substratos.
260 $c2008
520 $aO objetivo deste trabalho foi avaliar a germinação de sementes de embiruçu (Pseudobombax grandiflorum (Cav.) A. Robyns), colhidas em vários estádios de maturação, utilizando-se diferentes substratos. Os estádios avaliados foram 30, 60 e 80 dias após a antese (DAA) e os substratos utilizados foram papel, areia e vermiculita. O delineamento experimental utilizado foi o inteiramente casualizado (DIC), num esquema fatorial 3 x 3 (três períodos de maturação x três substratos), com quatro repetições de 25 sementes, sendo a comparação entre as médias dos tratamentos efetuada pelo teste de Tukey (a = 0,05). A vermiculita favoreceu maior porcentagem e velocidade de germinação das sementes com 60 DAA, enquanto sementes com 80 DAA germinaram igualmente nos três substratos, embora a areia tenha proporcionado maior velocidade de germinação nesse estádio.
650 $avigor
653 $aEspécie florestal
653 $aFormação de sementes
653 $aPseudobombax grandiflorum
653 $aTeor de água
700 1 $aMATHEUS, M. T.
700 1 $aCORRÊA, N. B.
700 1 $aSILVA, D. P. da
773 $tFloresta, Curitiba$gv. 38, n. 2, p. 331-337, abr./jun. 2008.
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Registro original: |
Embrapa Florestas (CNPF) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
20/08/2019 |
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Data da última atualização: |
07/02/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 4 |
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Autoria: |
CRUZ, D. C. da; BENAYAS, J. M. R.; FERREIRA, G. C.; MONTEIRO, A. L.; SCHWARTZ, G. |
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Afiliação: |
Denis Conrado da CRUZ, University of Alcalá; José María Rey BENAYAS, University of Alcalá; Gracialda Costa FERREIRA, UFRA; André Luis MONTEIRO, Geoforest Consultancy; GUSTAVO SCHWARTZ, CPATU. |
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Título: |
Evaluation of soil erosion process and conservation practices in the Paragominas-PA municipality (Brazil). |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Geographia Technica, v. 14, n. 1, p. 14-35, Mar. 2019. |
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DOI: |
10.21163/GT_2019.141.02 |
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Idioma: |
Inglês |
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Conteúdo: |
Over the last decades, the natural environment has been degraded at a much greater speed than its own resilience. Lack of knowledge about soil natural limitations and mismanagement can increase their degradation and nutrient losses by erosion. The objective of this study was to estimate and map soil vulnerability to erosion through the Universal Equation of Revised Soil Loss (RUSLE) and based on the ecodynamic concept of physical and biotic environment analysis, and finally to evaluate conservation practices in the municipality of Paragominas with the economic database of IBGE / SIDRA. In the two analyzed methods the percentage of area with low and high potential and erosivity estimation were similar. The estimation of low and low-moderate loss and vulnerability represents about 77% (15,064 km2) of the territory by RUSLE and 60% (11,485 km2), by ecodynamic concept. The high to very high soil loss zones represent only 3% (642 km2) and 2.7% (584 km2), in the RUSLE and ecodynamic concept, respectively. Most of the variables analyzed in both methods presented low estimation values of loss and erosivity potential. The soil and slope attributes, for example, obtained exactly 79% (15,377 km2 - RUSLE) and 80% (15,572 km2 - ecodynamic concept), except for the climate and factor R attributes, in both methods the vulnerability potential and erosion, were only 1.5% (292 km2) and 1.3% (253 km2), based on the ecodynamic concept and RUSLE respectively. The geospatial analysis of the use practices correlated with the economic data showed an intense use of agricultural activities, logging and mining, which caused severe environmental damages, considering that 45% (8,773.3 km2) of the municipality have already been deforested and converted into other uses. The municipality still has 47% (9,182 km2) of its territory covered by altered primary vegetation and 23% (4,441 km2) by secondary vegetation, important information to subsidize decision-making processes related to ecological-economic strategies for the management of natural resources in the study area. MenosOver the last decades, the natural environment has been degraded at a much greater speed than its own resilience. Lack of knowledge about soil natural limitations and mismanagement can increase their degradation and nutrient losses by erosion. The objective of this study was to estimate and map soil vulnerability to erosion through the Universal Equation of Revised Soil Loss (RUSLE) and based on the ecodynamic concept of physical and biotic environment analysis, and finally to evaluate conservation practices in the municipality of Paragominas with the economic database of IBGE / SIDRA. In the two analyzed methods the percentage of area with low and high potential and erosivity estimation were similar. The estimation of low and low-moderate loss and vulnerability represents about 77% (15,064 km2) of the territory by RUSLE and 60% (11,485 km2), by ecodynamic concept. The high to very high soil loss zones represent only 3% (642 km2) and 2.7% (584 km2), in the RUSLE and ecodynamic concept, respectively. Most of the variables analyzed in both methods presented low estimation values of loss and erosivity potential. The soil and slope attributes, for example, obtained exactly 79% (15,377 km2 - RUSLE) and 80% (15,572 km2 - ecodynamic concept), except for the climate and factor R attributes, in both methods the vulnerability potential and erosion, were only 1.5% (292 km2) and 1.3% (253 km2), based on the ecodynamic concept and RUSLE respectively. The geospatial analysis of the use pr... Mostrar Tudo |
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Palavras-Chave: |
Paragominas. |
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Thesagro: |
Conservação do Solo; Erosão do Solo. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02751naa a2200217 a 4500
001 2111463
005 2022-02-07
008 2019 bl uuuu u00u1 u #d
024 7 $a10.21163/GT_2019.141.02$2DOI
100 1 $aCRUZ, D. C. da
245 $aEvaluation of soil erosion process and conservation practices in the Paragominas-PA municipality (Brazil).$h[electronic resource]
260 $c2019
520 $aOver the last decades, the natural environment has been degraded at a much greater speed than its own resilience. Lack of knowledge about soil natural limitations and mismanagement can increase their degradation and nutrient losses by erosion. The objective of this study was to estimate and map soil vulnerability to erosion through the Universal Equation of Revised Soil Loss (RUSLE) and based on the ecodynamic concept of physical and biotic environment analysis, and finally to evaluate conservation practices in the municipality of Paragominas with the economic database of IBGE / SIDRA. In the two analyzed methods the percentage of area with low and high potential and erosivity estimation were similar. The estimation of low and low-moderate loss and vulnerability represents about 77% (15,064 km2) of the territory by RUSLE and 60% (11,485 km2), by ecodynamic concept. The high to very high soil loss zones represent only 3% (642 km2) and 2.7% (584 km2), in the RUSLE and ecodynamic concept, respectively. Most of the variables analyzed in both methods presented low estimation values of loss and erosivity potential. The soil and slope attributes, for example, obtained exactly 79% (15,377 km2 - RUSLE) and 80% (15,572 km2 - ecodynamic concept), except for the climate and factor R attributes, in both methods the vulnerability potential and erosion, were only 1.5% (292 km2) and 1.3% (253 km2), based on the ecodynamic concept and RUSLE respectively. The geospatial analysis of the use practices correlated with the economic data showed an intense use of agricultural activities, logging and mining, which caused severe environmental damages, considering that 45% (8,773.3 km2) of the municipality have already been deforested and converted into other uses. The municipality still has 47% (9,182 km2) of its territory covered by altered primary vegetation and 23% (4,441 km2) by secondary vegetation, important information to subsidize decision-making processes related to ecological-economic strategies for the management of natural resources in the study area.
650 $aConservação do Solo
650 $aErosão do Solo
653 $aParagominas
700 1 $aBENAYAS, J. M. R.
700 1 $aFERREIRA, G. C.
700 1 $aMONTEIRO, A. L.
700 1 $aSCHWARTZ, G.
773 $tGeographia Technica$gv. 14, n. 1, p. 14-35, Mar. 2019.
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