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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
24/01/2011 |
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Data da última atualização: |
04/09/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PARRON, L. M.; BUSTAMANTE, M. M. C.; MARKEWITZ, D. |
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Afiliação: |
LUCILIA MARIA PARRON VARGAS, CNPF; Mercedes Maria Cunha Bustamante, UnB; Daniel Markewitz, University of Georgia. |
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Título: |
Fluxes of nitrogen and phosphorus in a gallery forest in the Cerrado of central Brazil. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Biogeochemistry, v. 105, n. 1-3, p. 89-104, 2011. |
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DOI: |
10.1007/s10533-010-9537-z |
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Idioma: |
Inglês |
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Conteúdo: |
The Gallery forests of the Cerrado biome play a critical role in controlling stream chemistry but little information about biogeochemical processes in these ecosystems is available. This work describes the fluxes of N and P in solutions along a topographic gradient in a gallery forest. Three distinct floristic communities were identified along the gradient: a wet community nearest the stream, an upland dry community adjacent to the woodland savanna and an intermediate community between the two. Transects were marked in the three communities for sampling. Fluxes of N from bulk precipitation to these forests resulted in deposition of 12.6 kg ha-1 y-1 of total N of which 8.8 kg ha-1 was as inorganic N. The throughfall flux of total N was generally\8.4 kg ha-1 year-1. Throughfall NO3?N fluxes were higher (7?32%) while NH4?N and organic N fluxes were lower (54?69%and 5?46%) than those in bulk precipitation. The throughfall flux was slightly lower for the wet forest community compared to other communities. Litter leachate fluxes differed among floristic communities with higher NH4?N in the wet community. The total N flux was greater in the wet forest than in the dry forest (13.5 vs. 9.4 kg ha-1 year-1, respectively). The stream water had totalNflux of 0.3 kg ha-1 year-1. The flux of total P through bulk precipitation was 0.7 kg ha-1 year-1 while the mean fluxes of total P in throughfall (0.6 kg ha-1 year-1) and litter leachate (0.5 kg ha-1 year-1) declined but did not differ between communities. The low concentrations presented in soil solution and low fluxes in stream water (0.3 and 0.1 kg ha-1 year-1 for N and P, respectively) relative to other flowpaths emphasize the conservative nutrient cycling of these forests and the importance of internal recycling processes for the maintenance and conservation of riparian and stream ecosystems in the Cerrado. MenosThe Gallery forests of the Cerrado biome play a critical role in controlling stream chemistry but little information about biogeochemical processes in these ecosystems is available. This work describes the fluxes of N and P in solutions along a topographic gradient in a gallery forest. Three distinct floristic communities were identified along the gradient: a wet community nearest the stream, an upland dry community adjacent to the woodland savanna and an intermediate community between the two. Transects were marked in the three communities for sampling. Fluxes of N from bulk precipitation to these forests resulted in deposition of 12.6 kg ha-1 y-1 of total N of which 8.8 kg ha-1 was as inorganic N. The throughfall flux of total N was generally\8.4 kg ha-1 year-1. Throughfall NO3?N fluxes were higher (7?32%) while NH4?N and organic N fluxes were lower (54?69%and 5?46%) than those in bulk precipitation. The throughfall flux was slightly lower for the wet forest community compared to other communities. Litter leachate fluxes differed among floristic communities with higher NH4?N in the wet community. The total N flux was greater in the wet forest than in the dry forest (13.5 vs. 9.4 kg ha-1 year-1, respectively). The stream water had totalNflux of 0.3 kg ha-1 year-1. The flux of total P through bulk precipitation was 0.7 kg ha-1 year-1 while the mean fluxes of total P in throughfall (0.6 kg ha-1 year-1) and litter leachate (0.5 kg ha-1 year-1) declined but did not differ betwe... Mostrar Tudo |
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Palavras-Chave: |
Biogeochemical processe; Bulk precipitation; Floresta de galeria; Litter leachate; Processo biogeoquímico; Riparian zone. |
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Thesagro: |
Fósforo; Nitrogênio; Solo. |
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Thesaurus Nal: |
soil solution; throughfall. |
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Categoria do assunto: |
-- |
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Marc: |
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Registro original: |
Embrapa Florestas (CNPF) |
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| 3. |  | SILVA, D. de C. S. da; OLIVEIRA, L. A. de; PEIXOTO, F. J. B.; SANTOS, V. da S.; OLIVEIRA, E. J. de; LEDO, C. A. da S. Qualidade da raiz de híbridos entre espécies silvestres de Manihot e cultivares de mandioca. In: CONGRESSO BRASILEIRO DE MANDIOCA, 16.; CONGRESSO LATINO-AMERICANO E CARIBENHO DE MANDIOCA, 2015, Foz do Iguaçu. Integração: segurança alimentar e geração de renda: anais. Foz do Iguaçu: SBM, 2015. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| 4. | | SILVA, D. de C. S. da; MARTINS, M. L. L.; SANTOS, A. S.; SANTOS, V. da S.; ALVES, A. A. C.; LEDO, C. A. da S. Obtaining hybrids of cultivars and wild subspecies of cassava. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 53, n. 2, p. 182-188, Fev. 2018. Título em português: Obtenção de híbridos de cultivares e de subespécies silvestres de mandioca.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 5. | | SILVA, D. de C. S. da; MARTINS, M. L. L.; SANTOS, A. S.; SANTOS, V. da S.; ALVES, A. A. C.; LEDO, C. A. da S. Obtaining hybrids of cultivars and wild subspecies of cassava. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 53, n. 2, p. 182-188, fev. 2018 Título em português: Obtenção de híbridos de cultivares e de subespécies silvestres de mandioca.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| 6. | | MEISSNER FILHO, P. E.; VILARINHOS, A. D.; OLIVEIRA, V. J. dos S. de; SILVA, D. de C. S. da; SANTOS, V. da S.; DANTAS, J. L. L. Resistance of transgenic papaya trees to papaya ringspot in Brazil. Pesquisa Agropecuária Brasileira, Brasília, v.56, e01954, 2021.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Mandioca e Fruticultura; Embrapa Unidades Centrais. |
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| 8. | | LEDO, C. A. da S.; SANTOS, V. da S.; MARTIN, M. L. L.; ALVES, A. A. C.; SILVA, D. de C. S. da; SANTOS, A. S.; TAVARES FILHO, L. F. de Q. Hibridação interespecífica entre espécies silvestres de Manihot (Euphorbiaceae - Magnoliophyta) e cultivares de mandioca (Manihot esculenta Crantz). Cruz das Almas, BA: Embrapa Mandioca e Fruticultura, 2014. (Embrapa Mandioca e Fruticultura. Boletim de Pesquisa e Desenvolvimento, 65).| Tipo: Boletim de Pesquisa e Desenvolvimento |
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| Registros recuperados : 8 | |
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