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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
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Data corrente: |
05/12/2000 |
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Data da última atualização: |
30/01/2019 |
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Autoria: |
RENCK, A.; LEHMANN, J. |
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Afiliação: |
University of Bayreuth. |
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Título: |
Rapid water changes in a highly aggregated Xanthic Ferralsol of the central Amazon. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
In: GERMAN-BRAZILIAN WORKSHOP ON NEOTROPICAL ECOSYSTEMS, 2000, Hamburg. Programa and abstracts... Hamburg: University, 2000. |
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Páginas: |
p.182 |
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Idioma: |
Inglês |
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Conteúdo: |
We investigated (i) the soil water dynamics of a Xanthic Ferralsol to a soil depth of 4 m in order to evaluate the extent of rapid water percolation into the subsoil, and (ii) the effect of different indigenous tree crops on soil water contents. TDR and tensiometers were installed und cupuacu, pupunha (peach palm), castanha-do-Para (Brazil nut), urucu (annatto) in a multi-strata agroforestry system, in Manaus-AM (Brasil). After a heavy storm, soilwater suction decreases within a few minutes up to a depth of a 0.9 m-1.5 m, but significantly later at greater depths. Soil water depletion was highest at the topsoil for urucu and cupuacu, and decreased rapidly with depth. In constrat, pupunha took up water homogeneously from the soil profile to l.5 m depth. Castanha-do-Para was not able to utilize subsoil water as well as it was antecipated from the tap root found from root excavations. The legume cover crop pueraria did not take up soil water at a depth of 0.9 m and belos. Soil water dynamics under pupunha may indicate that this palm is better able to utilize subsoil water (0.9 m-1.5 m) and reduce nutrient leaching than the other investigated tree crops or the cover crop. Especially under the high leaching conditions of the aggregated soils and high rainfall regime, nutrient uptake from the topsoil may not reduce nutrient leaching due to the rapid soil water percolation even to greater depths. |
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Palavras-Chave: |
Agrofloresta; Amazonas; Brasil; Cover plants; Manaus; Nutrient; Plant water relations; Soil chemicophysical properties; Urucu. |
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Thesagro: |
Água do Solo; Bactris Gasipaes; Bertholletia Excelsa; Bixa Orellana; Castanha do Para; Cobertura do Solo; Conservação do Solo; Cultivo Multiplo; Cupuaçu; Física do Solo; Floresta Tropical Úmida; Latossolo Amarelo; Leguminosa; Lixiviação; Nutriente; Pueraria Phaseoloides; Pupunha; Relação Água-Planta; Theobroma Grandiflorum. |
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Thesaurus Nal: |
agroforestry; Ferralsols; leaching; legumes; multiple cropping; soil conservation; soil water; tropical rain forests. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03011naa a2200577 a 4500
001 1670042
005 2019-01-30
008 2000 bl uuuu u00u1 u #d
100 1 $aRENCK, A.
245 $aRapid water changes in a highly aggregated Xanthic Ferralsol of the central Amazon.
260 $c2000
300 $ap.182
520 $aWe investigated (i) the soil water dynamics of a Xanthic Ferralsol to a soil depth of 4 m in order to evaluate the extent of rapid water percolation into the subsoil, and (ii) the effect of different indigenous tree crops on soil water contents. TDR and tensiometers were installed und cupuacu, pupunha (peach palm), castanha-do-Para (Brazil nut), urucu (annatto) in a multi-strata agroforestry system, in Manaus-AM (Brasil). After a heavy storm, soilwater suction decreases within a few minutes up to a depth of a 0.9 m-1.5 m, but significantly later at greater depths. Soil water depletion was highest at the topsoil for urucu and cupuacu, and decreased rapidly with depth. In constrat, pupunha took up water homogeneously from the soil profile to l.5 m depth. Castanha-do-Para was not able to utilize subsoil water as well as it was antecipated from the tap root found from root excavations. The legume cover crop pueraria did not take up soil water at a depth of 0.9 m and belos. Soil water dynamics under pupunha may indicate that this palm is better able to utilize subsoil water (0.9 m-1.5 m) and reduce nutrient leaching than the other investigated tree crops or the cover crop. Especially under the high leaching conditions of the aggregated soils and high rainfall regime, nutrient uptake from the topsoil may not reduce nutrient leaching due to the rapid soil water percolation even to greater depths.
650 $aagroforestry
650 $aFerralsols
650 $aleaching
650 $alegumes
650 $amultiple cropping
650 $asoil conservation
650 $asoil water
650 $atropical rain forests
650 $aÁgua do Solo
650 $aBactris Gasipaes
650 $aBertholletia Excelsa
650 $aBixa Orellana
650 $aCastanha do Para
650 $aCobertura do Solo
650 $aConservação do Solo
650 $aCultivo Multiplo
650 $aCupuaçu
650 $aFísica do Solo
650 $aFloresta Tropical Úmida
650 $aLatossolo Amarelo
650 $aLeguminosa
650 $aLixiviação
650 $aNutriente
650 $aPueraria Phaseoloides
650 $aPupunha
650 $aRelação Água-Planta
650 $aTheobroma Grandiflorum
653 $aAgrofloresta
653 $aAmazonas
653 $aBrasil
653 $aCover plants
653 $aManaus
653 $aNutrient
653 $aPlant water relations
653 $aSoil chemicophysical properties
653 $aUrucu
700 1 $aLEHMANN, J.
773 $tIn: GERMAN-BRAZILIAN WORKSHOP ON NEOTROPICAL ECOSYSTEMS, 2000, Hamburg. Programa and abstracts... Hamburg: University, 2000.
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Embrapa Amazônia Ocidental (CPAA) |
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