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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Cerrados; Embrapa Soja; Embrapa Unidades Centrais. |
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Data corrente: |
08/11/2000 |
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Data da última atualização: |
04/02/2013 |
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Autoria: |
CARVALHO, A. M. de; BURLE, M. L.; PEREIRA, J.; SILVA, M. A. da. |
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Título: |
Manejo de adubos verdes no cerrado. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
Planaltina: Embrapa Cerrados, 1999. |
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Páginas: |
28p. |
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Série: |
(Embrapa Cerrados. Circular Tecnica, 4). |
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Idioma: |
Português |
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Conteúdo: |
O uso intensivo e inadequado dos solos acelera a degradação da matéria orgânica, principal componente de fertilidade dos solos do Cerrado. Os adubos verdes podem promover a adição de quantidades extras de resíduos vegetais ao solo e contribuir para o incremento da matéria orgânica. Além do aspecto da matéria orgânica, ressalta-se as demais vantagens dos adubos verdes, quais sejam: a cobertura do solo, o fornecimento de nutrientes, em especial o N, dentre outras. Esta publicação apresenta informações sobre o manejo de adubos verdes adaptados à região do Cerrado, relativas à produção e manejo de biomassa, à ciclagem de nutrientes, à cobertura do solo proporcionada, às formas de semeadura e produção de sementes e alguns cuidados especiais que devem ser tomados ao se utilizar determinads espécies de adubos verdes. Também são relatadas as opções de cultivo mais indicadas para inserir os adubos verdes nos sistemas agrícolas da região, bem como o efeito deles na produção da cultura comercial sucessiva. Sem dúvida, já existem opções viáveis de sistemas com adubos verdes para essa região que podem trazer benefícios significativos para a cultura comercial e para a conservação dos solos do Cerrado. |
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Palavras-Chave: |
Cover crop; Cover plants; Cropping sysems; Green manure; No till; Plantas de cobertura; Savanna; Sistemas de cultivos. |
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Thesagro: |
Adubação Verde; Adubo Verde; Cerrado; Cobertura do Solo; Fertilidade do Solo; Matéria Orgânica; Plantio Direto. |
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Thesaurus Nal: |
green manures; organic matter; soil fertility. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPAC-2010/3492/1/cirtec-04.pdf
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Marc: |
LEADER 02246nam a2200385 a 4500
001 1546470
005 2013-02-04
008 1999 bl uuuu u0uu1 u #d
100 1 $aCARVALHO, A. M. de
245 $aManejo de adubos verdes no cerrado.
260 $aPlanaltina: Embrapa Cerrados$c1999
300 $a28p.
490 $a(Embrapa Cerrados. Circular Tecnica, 4).
520 $aO uso intensivo e inadequado dos solos acelera a degradação da matéria orgânica, principal componente de fertilidade dos solos do Cerrado. Os adubos verdes podem promover a adição de quantidades extras de resíduos vegetais ao solo e contribuir para o incremento da matéria orgânica. Além do aspecto da matéria orgânica, ressalta-se as demais vantagens dos adubos verdes, quais sejam: a cobertura do solo, o fornecimento de nutrientes, em especial o N, dentre outras. Esta publicação apresenta informações sobre o manejo de adubos verdes adaptados à região do Cerrado, relativas à produção e manejo de biomassa, à ciclagem de nutrientes, à cobertura do solo proporcionada, às formas de semeadura e produção de sementes e alguns cuidados especiais que devem ser tomados ao se utilizar determinads espécies de adubos verdes. Também são relatadas as opções de cultivo mais indicadas para inserir os adubos verdes nos sistemas agrícolas da região, bem como o efeito deles na produção da cultura comercial sucessiva. Sem dúvida, já existem opções viáveis de sistemas com adubos verdes para essa região que podem trazer benefícios significativos para a cultura comercial e para a conservação dos solos do Cerrado.
650 $agreen manures
650 $aorganic matter
650 $asoil fertility
650 $aAdubação Verde
650 $aAdubo Verde
650 $aCerrado
650 $aCobertura do Solo
650 $aFertilidade do Solo
650 $aMatéria Orgânica
650 $aPlantio Direto
653 $aCover crop
653 $aCover plants
653 $aCropping sysems
653 $aGreen manure
653 $aNo till
653 $aPlantas de cobertura
653 $aSavanna
653 $aSistemas de cultivos
700 1 $aBURLE, M. L.
700 1 $aPEREIRA, J.
700 1 $aSILVA, M. A. da
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Registro original: |
Embrapa Cerrados (CPAC) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
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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