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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
15/07/1999 |
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Data da última atualização: |
15/07/1999 |
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Autoria: |
WESTERHOF, R.; VILELA, L.; AYARZA, M. A.; ZECH, W. |
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Título: |
Carbon fractions as sensitive indicators of quality of soil organic matter. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
In: THOMAS, R.; AYARZA, M.A., ed. Sustainable land management for the oxisols of the Latin American savannas: dynamics of soil organic matter and indicators of soil quality. Cali: CIAT, 1999. |
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Páginas: |
p.123-132. |
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Idioma: |
Inglês |
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Conteúdo: |
Soil organic matter quality is usually seen as a major attribute of soil quality. In this study, we extracted organic carbon with water (WEOC) or with potassium permanganate (PEOC). We assessed these extractions for their potential as sensitive indicators of the effect of land use on two important soil functions: biological activity and nutrient availability. Water-extractable organic carbon and PEOC were better correlated with C and N mineralization in the laboratory than were total and stable C, and were mineralization flush that occurs at the beginning of the wet season. However, the more stable fraction also seemed to contribute to the pool of mineralizable C and N was, within 5 years, siginificantly effected by changes in land use. Extraction of labile soil organic carbon with water and permanganate is an easy and valuable screening method for comparing the short-term effects of land-use systems on biological activity and nutrient availability in the soils of the Brazilian savannas. |
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Thesagro: |
Carbono; Cerrado; Matéria Orgânica; Mineralização; Nitrogênio; Oxisol; Permanganato de Potássio; Solo. |
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Thesaurus Nal: |
carbon; Ferralsols; mineralization; nitrogen; organic matter; potassium permanganate; soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02027naa a2200349 a 4500
001 1545403
005 1999-07-15
008 1999 bl uuuu u00u1 u #d
100 1 $aWESTERHOF, R.
245 $aCarbon fractions as sensitive indicators of quality of soil organic matter.
260 $c1999
300 $ap.123-132.
520 $aSoil organic matter quality is usually seen as a major attribute of soil quality. In this study, we extracted organic carbon with water (WEOC) or with potassium permanganate (PEOC). We assessed these extractions for their potential as sensitive indicators of the effect of land use on two important soil functions: biological activity and nutrient availability. Water-extractable organic carbon and PEOC were better correlated with C and N mineralization in the laboratory than were total and stable C, and were mineralization flush that occurs at the beginning of the wet season. However, the more stable fraction also seemed to contribute to the pool of mineralizable C and N was, within 5 years, siginificantly effected by changes in land use. Extraction of labile soil organic carbon with water and permanganate is an easy and valuable screening method for comparing the short-term effects of land-use systems on biological activity and nutrient availability in the soils of the Brazilian savannas.
650 $acarbon
650 $aFerralsols
650 $amineralization
650 $anitrogen
650 $aorganic matter
650 $apotassium permanganate
650 $asoil
650 $aCarbono
650 $aCerrado
650 $aMatéria Orgânica
650 $aMineralização
650 $aNitrogênio
650 $aOxisol
650 $aPermanganato de Potássio
650 $aSolo
700 1 $aVILELA, L.
700 1 $aAYARZA, M. A.
700 1 $aZECH, W.
773 $tIn: THOMAS, R.; AYARZA, M.A., ed. Sustainable land management for the oxisols of the Latin American savannas: dynamics of soil organic matter and indicators of soil quality. Cali: CIAT, 1999.
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Embrapa Cerrados (CPAC) |
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| Registros recuperados : 50 | |
| 4. |  | VILELA, L.; AYARZA, M. A.; MIRANDA, J. C. C. de. Agropastoral systems: activities developed by Cerrados Agricultural Research Center (Embrapa Cerrados). In: KANNO, T.; MACEDO, M.C.M., ed. JIRCAS / EMBRAPA gado de corte international joint workshop on agropastoral system in South America. [Tsukuba]: JIRCAS, 2001. p.19-33. (JIRCAS Working Report, 19). EMBRAPA-CNPGC and JIRCAS joint International Workshop on Agrospatoral System in South America, held in Campo Grande, MS, Brazil, 1999.| Biblioteca(s): Embrapa Cerrados. |
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| 6. | | RODRIGUES, L. O.; VILELA, L.; AYARZA, M. A.; KITAYAMA, K. Avaliacao da fauna do solo sob varios sistemas de manejo em um latossolo da regiao dos cerrados. In: SIMPOSIO SOBRE O CERRADO, 8.; INTERNATIONAL SYMPOSIUM ON TROPICAL SAVANNAS, 1., 1996, Brasilia, DF. Biodiversidade e producao sustentavel de alimentos e fibras nos Cerrados: anais... Planaltina: EMBRAPA-CPAC, 1996. p.375-378.| Biblioteca(s): Embrapa Cerrados. |
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| 16. | | RAMOS, A. K. B.; PIZARRO, E. A.; AYARZA, M. A.; CARVALHO, M. A.; COSTA, P. H. Avaliacao agronomica de gramineas forrageiras consorciadas com Stylosanthes guianensis Cv. Mineirao em Uberlandia - MG. In: REUNIAO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 33., 1996, Fortaleza, CE. Anais... Fortaleza: SBZ, 1996. v.2. p.206-208.| Biblioteca(s): Embrapa Cerrados. |
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| 17. | | PIZARRO, E. A.; RAMOS, A. K. B.; AYARZA, M. A.; CARVALHO, M. A.; COSTA, P. H. Avaliacao agronomica de leguminosas forrageiras consorciadas com B. decumbens em Uberlandia - MG. In: REUNIAO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 33., 1996, Fortaleza, CE. Anais... Fortaleza: SBZ, 1996. v.2. p.209-211.| Biblioteca(s): Embrapa Cerrados. |
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| 19. | | WESTERHOF, R.; BUURMAN, P.; GRIETHUYSEN, C. van; AYARZA, M. A.; VILELA, L.; ZECH, W. Aggregation studied by laser diffraction in relation to plowing and liming in the Cerrado region in Brazil. Geoderma, Amsterdam, v.90, p.277-290, 1999.| Biblioteca(s): Embrapa Cerrados. |
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| 20. | | WESTERHOF, R.; BUURMAN, P.; GRIETHUYSEN, C. van; AYARZA, M. A.; VILELA, L.; ZECH, W. Aggregation studied by laser diffraction in relation to plowing, soil organic matter, and lime in the Brazilian cerrados. In: THOMAS, R.; AYARZA, M.A., ed. Sustainable land management for the oxisols of the Latin American savannas: dynamics of soil organic matter and indicators of soil quality. Cali: CIAT, 1999. p.64-76.| Biblioteca(s): Embrapa Cerrados. |
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| Registros recuperados : 50 | |
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