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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
02/10/2015 |
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Data da última atualização: |
01/02/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
RAMOS, M. R.; MELO, V. F.; UHLMANN, A.; DEDECEK, R. A.; CURCIO, G. R. |
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Afiliação: |
Michele Ribeiro Ramos, Embrapa Florestas; Vander Freitas Melo, UFPR; ALEXANDRE UHLMANN, CNPF; Renato Antonio Dedecek, Embrapa Florestas; GUSTAVO RIBAS CURCIO, CNPF. |
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Título: |
Clay mineralogy and genesis of fragipan in soils from Southeast Brazil. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Catena, v. 135, p. 22-28, Dec. 2015. |
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DOI: |
http://dx.doi.org/10.1016/j.catena.2015.06.016 |
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Idioma: |
Inglês |
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Conteúdo: |
Fragipan horizon has a hard consistencywhen dry but is brittle when moist. Such a horizon restricts root growth and water infiltration due to the low volume of macropores and discontinuous voids. In Rio de Janeiro state in Brazil, neighboring soils were developed from different materials (sediments and granite/gneiss) and were subject to the same environmental conditions; one manifested fragipan characteristics in the subsurface and the other did not. The main objective of this study was to characterize and quantify clay minerals and relate their properties to the genesis of fragipan horizons. The fragipan in the studied soils show high bulk density (1.67 g cm?3) and low average macroporosity (0.03 cm cm?3), total porosity (0.42 cm cm?3) and hydraulic conductivity (1.43 cm h?1). Sequential and interrelated causes favored the formation of fragipan horizons: 1) face to face adjustment of kaolinite (Ka) filling of larger spaces occurring between sand grains, favored by low goethite contents and the absence of hematite and gibbsite; and 2) mineral binding and cementation of sand, silt and clay fractions by amorphous materials. Higher amounts of goethite and lower amounts of amorphous materials in the clay fraction were associated with horizons with higher total porosity. |
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Palavras-Chave: |
Brasil; Gênese; Mineralogia de argila; Sul. |
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Thesagro: |
Solo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01951naa a2200241 a 4500
001 2025720
005 2016-02-01
008 2015 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/j.catena.2015.06.016$2DOI
100 1 $aRAMOS, M. R.
245 $aClay mineralogy and genesis of fragipan in soils from Southeast Brazil.$h[electronic resource]
260 $c2015
520 $aFragipan horizon has a hard consistencywhen dry but is brittle when moist. Such a horizon restricts root growth and water infiltration due to the low volume of macropores and discontinuous voids. In Rio de Janeiro state in Brazil, neighboring soils were developed from different materials (sediments and granite/gneiss) and were subject to the same environmental conditions; one manifested fragipan characteristics in the subsurface and the other did not. The main objective of this study was to characterize and quantify clay minerals and relate their properties to the genesis of fragipan horizons. The fragipan in the studied soils show high bulk density (1.67 g cm?3) and low average macroporosity (0.03 cm cm?3), total porosity (0.42 cm cm?3) and hydraulic conductivity (1.43 cm h?1). Sequential and interrelated causes favored the formation of fragipan horizons: 1) face to face adjustment of kaolinite (Ka) filling of larger spaces occurring between sand grains, favored by low goethite contents and the absence of hematite and gibbsite; and 2) mineral binding and cementation of sand, silt and clay fractions by amorphous materials. Higher amounts of goethite and lower amounts of amorphous materials in the clay fraction were associated with horizons with higher total porosity.
650 $aSolo
653 $aBrasil
653 $aGênese
653 $aMineralogia de argila
653 $aSul
700 1 $aMELO, V. F.
700 1 $aUHLMANN, A.
700 1 $aDEDECEK, R. A.
700 1 $aCURCIO, G. R.
773 $tCatena$gv. 135, p. 22-28, Dec. 2015.
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Registro original: |
Embrapa Florestas (CNPF) |
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Biblioteca(s): |
Embrapa Amapá. |
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Data corrente: |
18/11/2019 |
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Data da última atualização: |
18/11/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
BATISTA, A. P. B.; SCOLFORO, H. F.; MELLO, J. M.; GUEDES, M. C.; TERRA, M. C. N. S.; SCALON, J. D.; GOMIDE, L. R.; SCOLFORO, P. G. V.; COOK, R. L. |
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Afiliação: |
ANDERSON PEDRO BERNARDINA BATISTA, UFLA; HENRIQUE FERRACO SCOLFORO, NORTH CAROLINA STATE UNIVERSITY; JOSÉ MÁRCIO DE MELLO, UFLA; MARCELINO CARNEIRO GUEDES, CPAF-AP; MARCELA CASTRO NUNES SANTOS TERRA, UFLA; JOÃO DOMINGOS SCALON, UFLA; LUCAS REZENDE GOMIDE, UFLA; PAULA GOMIDES VITOR SCOLFORO, UFLA; RACHEL L. COOK, NORTH CAROLINA STATE UNIVERSITY. |
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Título: |
Spatial association of fruit yield of Bertholletia excelsa Bonpl. trees in eastern Amazon. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Forest Ecology and Management, v. 441, p. 99-105, June, 2019. |
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DOI: |
https://doi.org/10.1016/j.foreco.2019.03.043 |
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Idioma: |
Inglês |
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Conteúdo: |
Brazil nut (Bertholletia excelsa) is one of the most important non-timber forest product (NTFP) species in the world. Better management and conservation practices will only be possible with an in-depth knowledge of tree species ecology. This study aimed to assess the spatial association of fruit yield of Bertholletia excelsa (B. excelsa) trees in two forest types (old growth terra firme forest and Amazon-cerrado transitional forest) in the Brazilian Amazon. Fruit yield was measured in both forest types during 2010. At each forest type, fruit yield was divided into different yield classes (number of fruits) for subsequent spatial modeling. The bivariate Ripley?s K-function was applied to quantify the spatial association of fruit yield of B. excelsa trees over different fruit yield classes. The results revealed that the forest type influences the spatial association of B. excelsa fruit yield. The old growth terra firme forest presented random spatial association for fruit yield, which implies that fruit yield of B. excelsa trees in this forest type is not limited by tree location and site resources. On the other hand, the Amazon-cerrado transitional forest presented significant negative spatial association for fruit yield across different yield classes, which means that under some conditions fruit yield of a given tree influences the fruit yield of the neighboring tree in this forest type. Site resources in the Amazon-cerrado transitional forest is limited and naturally favors inter- and intra-specific competition. Finally, the results imply the need for adoption of different management and conservation strategies for B. excelsa in different forest types in the Brazilian Amazon. MenosBrazil nut (Bertholletia excelsa) is one of the most important non-timber forest product (NTFP) species in the world. Better management and conservation practices will only be possible with an in-depth knowledge of tree species ecology. This study aimed to assess the spatial association of fruit yield of Bertholletia excelsa (B. excelsa) trees in two forest types (old growth terra firme forest and Amazon-cerrado transitional forest) in the Brazilian Amazon. Fruit yield was measured in both forest types during 2010. At each forest type, fruit yield was divided into different yield classes (number of fruits) for subsequent spatial modeling. The bivariate Ripley?s K-function was applied to quantify the spatial association of fruit yield of B. excelsa trees over different fruit yield classes. The results revealed that the forest type influences the spatial association of B. excelsa fruit yield. The old growth terra firme forest presented random spatial association for fruit yield, which implies that fruit yield of B. excelsa trees in this forest type is not limited by tree location and site resources. On the other hand, the Amazon-cerrado transitional forest presented significant negative spatial association for fruit yield across different yield classes, which means that under some conditions fruit yield of a given tree influences the fruit yield of the neighboring tree in this forest type. Site resources in the Amazon-cerrado transitional forest is limited and naturally favors... Mostrar Tudo |
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Palavras-Chave: |
Bivariate Ripley's K-function; Brazil nut; Forest Production; Modeling; Vegetables production. |
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Thesagro: |
Castanha; Produção Florestal; Produção Vegetal. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/204814/1/CPAF-AP-2019-Spatial-association-of-fruit-yiel-of-Bertholletia.pdf
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Marc: |
LEADER 02689naa a2200325 a 4500
001 2114430
005 2019-11-18
008 2019 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.foreco.2019.03.043$2DOI
100 1 $aBATISTA, A. P. B.
245 $aSpatial association of fruit yield of Bertholletia excelsa Bonpl. trees in eastern Amazon.$h[electronic resource]
260 $c2019
520 $aBrazil nut (Bertholletia excelsa) is one of the most important non-timber forest product (NTFP) species in the world. Better management and conservation practices will only be possible with an in-depth knowledge of tree species ecology. This study aimed to assess the spatial association of fruit yield of Bertholletia excelsa (B. excelsa) trees in two forest types (old growth terra firme forest and Amazon-cerrado transitional forest) in the Brazilian Amazon. Fruit yield was measured in both forest types during 2010. At each forest type, fruit yield was divided into different yield classes (number of fruits) for subsequent spatial modeling. The bivariate Ripley?s K-function was applied to quantify the spatial association of fruit yield of B. excelsa trees over different fruit yield classes. The results revealed that the forest type influences the spatial association of B. excelsa fruit yield. The old growth terra firme forest presented random spatial association for fruit yield, which implies that fruit yield of B. excelsa trees in this forest type is not limited by tree location and site resources. On the other hand, the Amazon-cerrado transitional forest presented significant negative spatial association for fruit yield across different yield classes, which means that under some conditions fruit yield of a given tree influences the fruit yield of the neighboring tree in this forest type. Site resources in the Amazon-cerrado transitional forest is limited and naturally favors inter- and intra-specific competition. Finally, the results imply the need for adoption of different management and conservation strategies for B. excelsa in different forest types in the Brazilian Amazon.
650 $aCastanha
650 $aProdução Florestal
650 $aProdução Vegetal
653 $aBivariate Ripley's K-function
653 $aBrazil nut
653 $aForest Production
653 $aModeling
653 $aVegetables production
700 1 $aSCOLFORO, H. F.
700 1 $aMELLO, J. M.
700 1 $aGUEDES, M. C.
700 1 $aTERRA, M. C. N. S.
700 1 $aSCALON, J. D.
700 1 $aGOMIDE, L. R.
700 1 $aSCOLFORO, P. G. V.
700 1 $aCOOK, R. L.
773 $tForest Ecology and Management$gv. 441, p. 99-105, June, 2019.
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