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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
09/05/2023 |
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Autoria: |
STARK, N. M.; JORDAN, C. F. |
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Afiliação: |
NELLIE M. STARK; CARL F. JORDAN. |
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Título: |
Nutrient retention by the root mat of an Amozonian rain forest. |
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Ano de publicação: |
1978 |
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Fonte/Imprenta: |
Ecology, v. 59, n. 3, p. 434-437, May, 1978. |
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DOI: |
https://doi.org/10.2307/1936571 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Surface root mats on oxisols and spodosols near San Carlos de Rio Negro, Venezuela, were sprayed with (45)Ca and (32)P to simulate the addition of nutrients to the soil surface through leaching of decomposing litter, and through precipitation and throughfall. Collections from lysimeters placed below the root mat and humus layer showed that in all but 1 case, <0.1% of the radiotracers leached past the root?organic mat, and leaching stopped completely after 1 to 2 months. Through analysis of root mat samples, the radioisotopes were found to have been taken up and translocated by living roots. This is the first evidence supporting the ability of the root map on the surface of poor, depleted tropical soils to efficiently take up dissolved nutrients before they percolate down to mineral soil. Other studies have shown up that one of the uptake mechanisms is mycorrhizal fungi. |
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Thesagro: |
Fertilidade; Solo. |
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Thesaurus Nal: |
Amazonia; Brazil; Nutrient retention; Soil chemistry; Soil physics; Tropical rain forests. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 01560naa a2200241 a 4500
001 1520797
005 2023-05-09
008 1978 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.2307/1936571$2DOI
100 1 $aSTARK, N. M.
245 $aNutrient retention by the root mat of an Amozonian rain forest.$h[electronic resource]
260 $c1978
520 $aAbstract: Surface root mats on oxisols and spodosols near San Carlos de Rio Negro, Venezuela, were sprayed with (45)Ca and (32)P to simulate the addition of nutrients to the soil surface through leaching of decomposing litter, and through precipitation and throughfall. Collections from lysimeters placed below the root mat and humus layer showed that in all but 1 case, <0.1% of the radiotracers leached past the root?organic mat, and leaching stopped completely after 1 to 2 months. Through analysis of root mat samples, the radioisotopes were found to have been taken up and translocated by living roots. This is the first evidence supporting the ability of the root map on the surface of poor, depleted tropical soils to efficiently take up dissolved nutrients before they percolate down to mineral soil. Other studies have shown up that one of the uptake mechanisms is mycorrhizal fungi.
650 $aAmazonia
650 $aBrazil
650 $aNutrient retention
650 $aSoil chemistry
650 $aSoil physics
650 $aTropical rain forests
650 $aFertilidade
650 $aSolo
700 1 $aJORDAN, C. F.
773 $tEcology$gv. 59, n. 3, p. 434-437, May, 1978.
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| 1. |  | MAGNONI JÚNIOR, LOURENÇO; MASSAMBANI, O.; STEVENS, D.; SILVA, W. T. L. da; VALE, J. M. F. do; PURINI, S. R. de M.; MAGNONI, M. da G. M.; SEBASTIÃO, E.; FIGUEIREDO, W. dos S.; SEBASTIÃO, I. JC na Escola Ciência, Tecnologia e Sociedade: mobilizar o conhecimento para alimentar o Brasil. 1. ed. São Paulo: Centro Paula Souza, 2017. 175 p.| Tipo: Autoria/Organização/Edição de Livros |
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