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| Registros recuperados : 97 | |
| 5. |  | DENICH, M.; BLOCK, A.; LUCKE, W.; VLEK, P. L. G. A bush chopper for mulch production in fallow based agriculture and resource conservation. In: LIEBEREI, R.; BIANCHI, H.; VOB, K., ed. Proceedings of the third SHIFT-Workshop, Manaus march 15-19, 1998. Bonn: Bundesministerium fur Bildung und Forschung, 1998. p.61-66.| Biblioteca(s): Embrapa Amazônia Oriental; Embrapa Florestas. |
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| 8. | | JONSSON, A.; DENICH, M.; VIELHAUER, K.; VLEK, P. L. G. Energy balances of traditional and modified land use systems in the eastern Amazon basin, Brazil - a case study. In: SHIFT-WORKSHOP, 3., 1998, Manaus. Program, abstracts of presentation and posters. [S.l.]: SHIFT, 1998. A18.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 10. | | JONSON, A.; VIELHAUER, K.; DENICH, M.; VLEK, P. L. G. Energy balance of traditional and modified land use systems n the Eastern Amazon basin, Brazil, as case study. In: LIEBEREI, R.; BIANCHI, H.; VOB, K., ed. Proceedings of the third SHIFT-Workshop, Manaus march 15-19, 1998. Bonn: Bundesministerium fur Bildung und Forschung, 1998. p.101-107.| Biblioteca(s): Embrapa Florestas. |
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| 13. | | BUNEMANN, E.; DENICH, M.; VIELHAUER, K.; VLEK, P. L. G. Fertilizer response of maize and cowpea under conditions of fire-free land preparation in NE Para. In: LIEBEREI, R.; BIANCHI, H.; VOB, K., ed. Proceedings of the third SHIFT-Workshop, Manaus march 15-19, 1998. Bonn: Bundesministerium fur Bildung und Forschung, 1998. p.157-159.| Biblioteca(s): Embrapa Florestas. |
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| 18. | | WIESENMULLER, J.; SANTOS, W.; DENICH, M.; VLEK, P. L. G. Modeling of fine root distribution under-secondary vegetation in NE Amazonia a qualitative and quantitative assessment. In: LIEBEREI, R.; BIANCHI, H.; VOB, K., ed. Proceedings of the third SHIFT-Workshop, Manaus march 15-19, 1998. Bonn: Bundesministerium fur Bildung und Forschung, 1998. p.185-189.| Biblioteca(s): Embrapa Florestas. |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
24/01/2005 |
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Data da última atualização: |
02/12/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
SOMMER, R.; FÖLSTER, H.; VIELHAUER, K.; CARVALHO, E. J. M.; VLEK, P. L. G. |
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Afiliação: |
Rolf Sommer, ZEF, Center for Development Research, Univ. of Bonn / CIMMYT; Horst Fölster, Institute of Soil Science and Forest Nutrition, Univ. of Göttingen; Konrad Vielhauer, ZEF, Center for Development Research, Univ. of Bonn; EDUARDO JORGE MAKLOUF CARVALHO, CPATU; Paul L. G. Vlek, ZEF, Center for Development Research, Univ. of Bonn. |
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Título: |
Deep soil water dynamics and depletion by secondary vegetation in the Eastern Amazon. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Soil Science Society of America, v. 67, n. 6, p. 1672-1686, 2003. |
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DOI: |
10.2136/sssaj2003.1672 |
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Idioma: |
Inglês |
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Conteúdo: |
Secondary/fallow vegetation is found extensively in the Eastern Amazon. The role of this deep-rooting vegetation in the hydrological cycle is unknown. We studied the water dynamics of this vegetation with emphasis on the deeper soil by means of a soil water model. The soil hydraulic properties were optimized in an inverse modeling procedure using the soil water model Hydrus-1D providing rainfall, actual evapotranspiration (E a) determined with the Bowen ratio energy balance method (BREB), rooting depth, and distribution, as well as the in situ control measurements of soil water pressure head and soil moisture. In 1997, E a according to BREB measurements amounted to 1174 mm, in 1998 this was 1475 mm. Modeled drainage at a 10-m depth in the 2 yr was 951 and 1016 mm, respectively. The model indicated that around 27% of the soil water was taken up below the 0.9-m depth in the 2-yr study period. During the severe 1997 dry season, according to the soil water model E a was reduced drastically, as the soil water storage was depleted. According to micrometeorological measurements, however, Ea was not reduced as extremely. This difference might be due to general uncertainties of the soil water model as well as BREB measurements. On the other hand, formation and subsequent evaporation of early morning dew apparently contributed to E a, which was not considered in the soil water model. In general, besides slightly lower interception, the water budget of a young secondary vegetation did not differ from that reported for Amazonian primary forest. MenosSecondary/fallow vegetation is found extensively in the Eastern Amazon. The role of this deep-rooting vegetation in the hydrological cycle is unknown. We studied the water dynamics of this vegetation with emphasis on the deeper soil by means of a soil water model. The soil hydraulic properties were optimized in an inverse modeling procedure using the soil water model Hydrus-1D providing rainfall, actual evapotranspiration (E a) determined with the Bowen ratio energy balance method (BREB), rooting depth, and distribution, as well as the in situ control measurements of soil water pressure head and soil moisture. In 1997, E a according to BREB measurements amounted to 1174 mm, in 1998 this was 1475 mm. Modeled drainage at a 10-m depth in the 2 yr was 951 and 1016 mm, respectively. The model indicated that around 27% of the soil water was taken up below the 0.9-m depth in the 2-yr study period. During the severe 1997 dry season, according to the soil water model E a was reduced drastically, as the soil water storage was depleted. According to micrometeorological measurements, however, Ea was not reduced as extremely. This difference might be due to general uncertainties of the soil water model as well as BREB measurements. On the other hand, formation and subsequent evaporation of early morning dew apparently contributed to E a, which was not considered in the soil water model. In general, besides slightly lower interception, the water budget of a young secondary vegetation did ... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Vegetação secudária. |
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Thesagro: |
Água; Relação Solo-Água; Solo; Subsolo. |
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Thesaurus NAL: |
Amazonia. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02312naa a2200265 a 4500
001 1406326
005 2022-12-02
008 2003 bl uuuu u00u1 u #d
024 7 $a10.2136/sssaj2003.1672$2DOI
100 1 $aSOMMER, R.
245 $aDeep soil water dynamics and depletion by secondary vegetation in the Eastern Amazon.$h[electronic resource]
260 $c2003
520 $aSecondary/fallow vegetation is found extensively in the Eastern Amazon. The role of this deep-rooting vegetation in the hydrological cycle is unknown. We studied the water dynamics of this vegetation with emphasis on the deeper soil by means of a soil water model. The soil hydraulic properties were optimized in an inverse modeling procedure using the soil water model Hydrus-1D providing rainfall, actual evapotranspiration (E a) determined with the Bowen ratio energy balance method (BREB), rooting depth, and distribution, as well as the in situ control measurements of soil water pressure head and soil moisture. In 1997, E a according to BREB measurements amounted to 1174 mm, in 1998 this was 1475 mm. Modeled drainage at a 10-m depth in the 2 yr was 951 and 1016 mm, respectively. The model indicated that around 27% of the soil water was taken up below the 0.9-m depth in the 2-yr study period. During the severe 1997 dry season, according to the soil water model E a was reduced drastically, as the soil water storage was depleted. According to micrometeorological measurements, however, Ea was not reduced as extremely. This difference might be due to general uncertainties of the soil water model as well as BREB measurements. On the other hand, formation and subsequent evaporation of early morning dew apparently contributed to E a, which was not considered in the soil water model. In general, besides slightly lower interception, the water budget of a young secondary vegetation did not differ from that reported for Amazonian primary forest.
650 $aAmazonia
650 $aÁgua
650 $aRelação Solo-Água
650 $aSolo
650 $aSubsolo
653 $aBrasil
653 $aVegetação secudária
700 1 $aFÖLSTER, H.
700 1 $aVIELHAUER, K.
700 1 $aCARVALHO, E. J. M.
700 1 $aVLEK, P. L. G.
773 $tSoil Science Society of America$gv. 67, n. 6, p. 1672-1686, 2003.
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