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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
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Data corrente: |
24/08/2009 |
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Data da última atualização: |
27/02/2019 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
SOUZA, A. das G. C. de; SOUSA, N. R.; SOUZA, M. G. de. |
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Afiliação: |
APARECIDA DAS GRACAS C DE SOUZA, CPAA; NELCIMAR REIS SOUSA, CPAA; MARIA GERALDA DE SOUZA, CPAA. |
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Título: |
Divergência genética entre clones de cupuaçuzeiro com base em características dos frutos. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE MELHORAMENTO DE PLANTAS, 5., 2009, Guarapari. O melhoramento e os novos cenários da agricultura: anais. Vitória: Incaper, 2009. 1 CD-ROM. (Incaper. Documentos, 011). |
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Idioma: |
Português |
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Conteúdo: |
O objetivo avaliar a diversidade genética entre 23 clones de cupuaçuzeiro, discriminando os caracteres mais importantes para a divergência genética em procedimentos multivariados. O trabalho foi realizado na Embrapa Amazônia Ocidental em Manaus, AM, em um ensaio com 23 clones. Avaliou-se 9 características do fruto. Os clones foram agrupados utilizando o método de otimização de Tocher, com base nas estimativas de distância Euclidiana média padronizada, utilizando os procedimentos de análise multivariada. Houve a formação de 11 grupos, com maior concentração no primeiro grupo. Em ordem decrescente a contribuição relativa de cada característica para a diversidade genética entre os clones foram número de sementes/fruto, percentual de casca/fruto, percentual de polpa/fruto e percentual de sementes/fruto, totalizando 84,1% de contribuição para a distribuição total, sendo portanto consideradas as mais importantes. |
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Palavras-Chave: |
Dievrgência genética. |
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Thesagro: |
Clone; Guaraná; Paullinia Cupana. |
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Categoria do assunto: |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/112241/1/2805.pdf
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Marc: |
LEADER 01631nam a2200181 a 4500
001 1684644
005 2019-02-27
008 2009 bl uuuu u00u1 u #d
100 1 $aSOUZA, A. das G. C. de
245 $aDivergência genética entre clones de cupuaçuzeiro com base em características dos frutos.
260 $aIn: CONGRESSO BRASILEIRO DE MELHORAMENTO DE PLANTAS, 5., 2009, Guarapari. O melhoramento e os novos cenários da agricultura: anais. Vitória: Incaper, 2009. 1 CD-ROM. (Incaper. Documentos, 011).$c2009
520 $aO objetivo avaliar a diversidade genética entre 23 clones de cupuaçuzeiro, discriminando os caracteres mais importantes para a divergência genética em procedimentos multivariados. O trabalho foi realizado na Embrapa Amazônia Ocidental em Manaus, AM, em um ensaio com 23 clones. Avaliou-se 9 características do fruto. Os clones foram agrupados utilizando o método de otimização de Tocher, com base nas estimativas de distância Euclidiana média padronizada, utilizando os procedimentos de análise multivariada. Houve a formação de 11 grupos, com maior concentração no primeiro grupo. Em ordem decrescente a contribuição relativa de cada característica para a diversidade genética entre os clones foram número de sementes/fruto, percentual de casca/fruto, percentual de polpa/fruto e percentual de sementes/fruto, totalizando 84,1% de contribuição para a distribuição total, sendo portanto consideradas as mais importantes.
650 $aClone
650 $aGuaraná
650 $aPaullinia Cupana
653 $aDievrgência genética
700 1 $aSOUSA, N. R.
700 1 $aSOUZA, M. G. de
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Registro original: |
Embrapa Amazônia Ocidental (CPAA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
23/11/2016 |
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Data da última atualização: |
23/11/2016 |
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Autoria: |
SANTOS, F. M.; CHAER, G. M.; DINIZ, A. R.; BALIEIRO, F. de C. |
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Afiliação: |
GUILHERME MONTANDON CHAER, CNPAB; FABIANO DE CARVALHO BALIEIRO, CNPS. |
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Título: |
Nutrient cycling over five years of mixed-species plantations of Eucalyptus and Acacia on a sandy tropical soil. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Forest Ecology and Management v. 384, p. 110-121, Jan. 2017. |
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DOI: |
10.1016/j.foreco.2016.10.041 |
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Idioma: |
Português |
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Conteúdo: |
Mixed-species plantations have the potential to enhance nutrient cycling and increase the overall biomass of the stand. In this study, we evaluate the dynamics of nutrient accumulation and exports in mixed-species plantations of Eucalyptus urograndis (Eucalyptus urophylla S. T. Blake x Eucalyptus grandis W. Hill ex Maiden) and Acacia mangium Willd. after five years of rotation. Monocultures of Eucalyptus urograndis, with or without nitrogen fertilization (120 kg N ha-1) (E100 and E100 + N, respectively), and of Acacia mangium (A100) were established in a randomized block experimental design. Two arrangements with these species in mixed stands were also established: one with 50% of the stand density composed by each species (E50A50; 1,111 trees ha-1), and one high-density system, containing double the population of each species (E100A100; 2,222 trees ha-1). Aboveground biomass and litter nutrient contents, nutrient retranslocation from leaves, and nutrient export through wood harvesting were measured over a full rotation. Eucalyptus in E50A50, despite having half of the population of trees (555 trees ha-1), accumulated the same amount of nutrients in total aboveground biomass in relation to E100, suggesting a lower nutrient limitation to the growth of Eucalyptus in this mixed stand. Conversely, Eucalyptus in E100A100 did not accumulate proportionally larger amounts of nutrients in relation to E50A50, possibly due to intra- and interspecific competition in this high-density arrangement. The deposition of N and K via litter was higher in mixed-species stands than in Eucalyptus monocultures. Also, P, Ca and Mg depositions were higher in mixed-species stands than Acacia monocultures. These results suggest higher nutrient cycling and availability in the mixtures, especially after 30 months. The retranslocation of N in Eucalyptus and Acacia leaves decreased with age. At 60 months, Eucalyptus trees in E100A100 retranslocated less N than the trees in E100, probably reflecting the higher availability of soil N in relation to E100. At this same age, the Eucalyptus trees planted in E50A50 exported less N, P, K and Mg in relation to E100. However, at stand level, mixtures exported more N due to the enrichment of this nutrient in the soil promoted by Acacia. This study shows the importance of introducing Acacia in Eucalyptus plantations to promote a positive balance of nutrients for subsequent rotations and additional ecological benefits to the ecosystem due to N2-fixation from Acacia trees. MenosMixed-species plantations have the potential to enhance nutrient cycling and increase the overall biomass of the stand. In this study, we evaluate the dynamics of nutrient accumulation and exports in mixed-species plantations of Eucalyptus urograndis (Eucalyptus urophylla S. T. Blake x Eucalyptus grandis W. Hill ex Maiden) and Acacia mangium Willd. after five years of rotation. Monocultures of Eucalyptus urograndis, with or without nitrogen fertilization (120 kg N ha-1) (E100 and E100 + N, respectively), and of Acacia mangium (A100) were established in a randomized block experimental design. Two arrangements with these species in mixed stands were also established: one with 50% of the stand density composed by each species (E50A50; 1,111 trees ha-1), and one high-density system, containing double the population of each species (E100A100; 2,222 trees ha-1). Aboveground biomass and litter nutrient contents, nutrient retranslocation from leaves, and nutrient export through wood harvesting were measured over a full rotation. Eucalyptus in E50A50, despite having half of the population of trees (555 trees ha-1), accumulated the same amount of nutrients in total aboveground biomass in relation to E100, suggesting a lower nutrient limitation to the growth of Eucalyptus in this mixed stand. Conversely, Eucalyptus in E100A100 did not accumulate proportionally larger amounts of nutrients in relation to E50A50, possibly due to intra- and interspecific competition in this high-density ar... Mostrar Tudo |
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Palavras-Chave: |
Acumulação de nutrientes; Árvores de leguminosas fixadoras de nitrogênio; Coeficiente de utilização biológica; Consorciação de culturas; Retranslocação de nutrientes. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03299nam a2200217 a 4500
001 2056952
005 2016-11-23
008 2017 bl uuuu u0uu1 u #d
024 7 $a10.1016/j.foreco.2016.10.041$2DOI
100 1 $aSANTOS, F. M.
245 $aNutrient cycling over five years of mixed-species plantations of Eucalyptus and Acacia on a sandy tropical soil.
260 $aForest Ecology and Management v. 384, p. 110-121, Jan. 2017.$c2017
520 $aMixed-species plantations have the potential to enhance nutrient cycling and increase the overall biomass of the stand. In this study, we evaluate the dynamics of nutrient accumulation and exports in mixed-species plantations of Eucalyptus urograndis (Eucalyptus urophylla S. T. Blake x Eucalyptus grandis W. Hill ex Maiden) and Acacia mangium Willd. after five years of rotation. Monocultures of Eucalyptus urograndis, with or without nitrogen fertilization (120 kg N ha-1) (E100 and E100 + N, respectively), and of Acacia mangium (A100) were established in a randomized block experimental design. Two arrangements with these species in mixed stands were also established: one with 50% of the stand density composed by each species (E50A50; 1,111 trees ha-1), and one high-density system, containing double the population of each species (E100A100; 2,222 trees ha-1). Aboveground biomass and litter nutrient contents, nutrient retranslocation from leaves, and nutrient export through wood harvesting were measured over a full rotation. Eucalyptus in E50A50, despite having half of the population of trees (555 trees ha-1), accumulated the same amount of nutrients in total aboveground biomass in relation to E100, suggesting a lower nutrient limitation to the growth of Eucalyptus in this mixed stand. Conversely, Eucalyptus in E100A100 did not accumulate proportionally larger amounts of nutrients in relation to E50A50, possibly due to intra- and interspecific competition in this high-density arrangement. The deposition of N and K via litter was higher in mixed-species stands than in Eucalyptus monocultures. Also, P, Ca and Mg depositions were higher in mixed-species stands than Acacia monocultures. These results suggest higher nutrient cycling and availability in the mixtures, especially after 30 months. The retranslocation of N in Eucalyptus and Acacia leaves decreased with age. At 60 months, Eucalyptus trees in E100A100 retranslocated less N than the trees in E100, probably reflecting the higher availability of soil N in relation to E100. At this same age, the Eucalyptus trees planted in E50A50 exported less N, P, K and Mg in relation to E100. However, at stand level, mixtures exported more N due to the enrichment of this nutrient in the soil promoted by Acacia. This study shows the importance of introducing Acacia in Eucalyptus plantations to promote a positive balance of nutrients for subsequent rotations and additional ecological benefits to the ecosystem due to N2-fixation from Acacia trees.
653 $aAcumulação de nutrientes
653 $aÁrvores de leguminosas fixadoras de nitrogênio
653 $aCoeficiente de utilização biológica
653 $aConsorciação de culturas
653 $aRetranslocação de nutrientes
700 1 $aCHAER, G. M.
700 1 $aDINIZ, A. R.
700 1 $aBALIEIRO, F. de C.
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