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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Ocidental. Para informações adicionais entre em contato com cpaa.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
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Data corrente: |
25/11/1996 |
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Data da última atualização: |
18/02/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ROBERTS, J.; CABRAL, O. M. R.; AGUIAR, L. F. de. |
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Afiliação: |
Institute of Hydrology; EMBRAPA-CNPSD; Universidade do Amazonas-UA.; OSVALDO MACHADO RODRIGUES CABRAL, CNPSD. |
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Título: |
Stomatal and boundary-layer conductances in an Amazonian terra firme rain forest. |
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Ano de publicação: |
1990 |
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Fonte/Imprenta: |
Journal of Applied Ecology, v. 27, n. 1, p. 336-356, 1990. |
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Idioma: |
Inglês |
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Conteúdo: |
Diurnal measurements of stomatal conductance (gs) and boundary layer conductance (gs) were made through the canopy at a primary rain forest site in the Amazon Basin, Brazil, in three experimental seasons and over a range of soil water conditions. Maximum values of gs were observed near the top of the 40 m deep canopy and they declined towards the forest floor. Observed values of gs also decreased through the canopy, but a slight maximum occurred 20 m from the ground. In the upper part of the tree canopy the diurnal maximum in gs occurred in the mid-morning and the value declined for the ramainder of the day. This peak was less marked lower in the canopy, and was not present near the forest floor. gs was correlated negatively with specific humidity deficid (D)and positively with solar radiation (S). The response of gs to D increased with increasing S at all but the highest values of S. The lowest values of gs occurred at the same time as the lowest soil water potentials although these corresponded to only moderate soil water deficits. |
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Palavras-Chave: |
Brasil; Energy partition; Precipitacao fluvial; Radiation; Rainfall interception; Tropical rain forest. |
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Thesagro: |
Água; Chuva; Floresta Tropical Úmida; Microclima; Radiação; Solo. |
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Thesaurus Nal: |
Amazonia; canopy; microclimate; soil water content. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01965naa a2200337 a 4500
001 1667263
005 2020-02-18
008 1990 bl uuuu u00u1 u #d
100 1 $aROBERTS, J.
245 $aStomatal and boundary-layer conductances in an Amazonian terra firme rain forest.$h[electronic resource]
260 $c1990
520 $aDiurnal measurements of stomatal conductance (gs) and boundary layer conductance (gs) were made through the canopy at a primary rain forest site in the Amazon Basin, Brazil, in three experimental seasons and over a range of soil water conditions. Maximum values of gs were observed near the top of the 40 m deep canopy and they declined towards the forest floor. Observed values of gs also decreased through the canopy, but a slight maximum occurred 20 m from the ground. In the upper part of the tree canopy the diurnal maximum in gs occurred in the mid-morning and the value declined for the ramainder of the day. This peak was less marked lower in the canopy, and was not present near the forest floor. gs was correlated negatively with specific humidity deficid (D)and positively with solar radiation (S). The response of gs to D increased with increasing S at all but the highest values of S. The lowest values of gs occurred at the same time as the lowest soil water potentials although these corresponded to only moderate soil water deficits.
650 $aAmazonia
650 $acanopy
650 $amicroclimate
650 $asoil water content
650 $aÁgua
650 $aChuva
650 $aFloresta Tropical Úmida
650 $aMicroclima
650 $aRadiação
650 $aSolo
653 $aBrasil
653 $aEnergy partition
653 $aPrecipitacao fluvial
653 $aRadiation
653 $aRainfall interception
653 $aTropical rain forest
700 1 $aCABRAL, O. M. R.
700 1 $aAGUIAR, L. F. de
773 $tJournal of Applied Ecology$gv. 27, n. 1, p. 336-356, 1990.
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Embrapa Amazônia Ocidental (CPAA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Agrossilvipastoril. |
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Data corrente: |
08/07/2019 |
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Data da última atualização: |
04/12/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
ANDREA, M. C. da S.; VIEIRA, F. F.; DALLACORT, R.; BARBIERI, J. D.; FREITAS, P. S. L. de; TIEPPO, R. C.; ZOLIN, C. A.; KRAUSE, W.; DANIEL, D. F. |
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Afiliação: |
MARIA CAROLINA DA SILVA ANDREA, UNEMAT, Tangará da Serra, MT; FRANCIELLE FREITAS VIEIRA, UNEMAT, Tangará da Serra, MT; RIVANILDO DALLACORT, UNEMAT, Tangará da Serra, MT; JOÃO DANILO BARBIERI, UEM, Maringa, PR; PAULO SÉRGIO LOURENÇO DE FREITAS, UEM, Maringa, PR; RAFAEL CESAR TIEPPO, UNEMAT, Tangará da Serra, MT; CORNELIO ALBERTO ZOLIN, CPAMT; WILLIAN KRAUSE, UNEMAT, Tangará da Serra, MT; DIEGO FERNANDO DANIEL, UNEMAT, Tangará da Serra, MT. |
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Título: |
Effect of soil coverage on dual crop coefficient of maize in a region of Mato Grosso, Brazil. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Journal of Agricultural Science, v. 11, n. 14, p. 143-155, 2019. |
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ISSN: |
1916-9752 |
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Idioma: |
Inglês |
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Conteúdo: |
With the objective of determining maize?s specific water requirements in different soil cover conditions in a Cerrado region of Mato Grosso, Brazil, this study used the dual?s crop coefficient (Kc dual) approach, according to FAO methods. An experiment was carried out in 2016, with three treatments: without vegetation soil cover; soil cover of 4 t ha-1 and soil cover of 8 t ha-1 dry matter of brachiaria grass. The used methodology accounts for crop?s transpiration component (through its basal coefficient, Kcb) and soil evaporation component (through its coefficient, Ke), which were determined for initial, intermediate and final phases of crop development. Experiments were carried in lysimeters to determine crop?s evapotranspiration, and in microlysimeters to determine soil evaporation. Crop?s transpiration, on three soil coverage treatments, showed overall highest values for the treatment with greater coverage (Kcb maximum values of 0.88, 1.00 and 1.03 from the lowest to greater soil coverage), while between crop?s phases, coefficient values were always higher at the intermediate stage, presenting decreases with crop senescence. Soil evaporation was highest on treatment without coverage in all crop?s stages (Ke = 0.37-0.78) and lowest in the treatment with greater coverage (Ke = 0.11-0.35). Yields were higher on treatments with coverage (9929.18 and 9939.52 kg ha-1 for treatments with 4 and 8 t ha-1) and lower when cultivated in soil without cover (8264.67 kg ha-1). Despite relatively higher crop?s transpiration with greater soil coverage, this treatment was identified as the best management option in the assessed tropical region of Brazilian Cerrado, in terms of rational use of water, due to lowest losses through evaporation, as also providing the highest grain yields. MenosWith the objective of determining maize?s specific water requirements in different soil cover conditions in a Cerrado region of Mato Grosso, Brazil, this study used the dual?s crop coefficient (Kc dual) approach, according to FAO methods. An experiment was carried out in 2016, with three treatments: without vegetation soil cover; soil cover of 4 t ha-1 and soil cover of 8 t ha-1 dry matter of brachiaria grass. The used methodology accounts for crop?s transpiration component (through its basal coefficient, Kcb) and soil evaporation component (through its coefficient, Ke), which were determined for initial, intermediate and final phases of crop development. Experiments were carried in lysimeters to determine crop?s evapotranspiration, and in microlysimeters to determine soil evaporation. Crop?s transpiration, on three soil coverage treatments, showed overall highest values for the treatment with greater coverage (Kcb maximum values of 0.88, 1.00 and 1.03 from the lowest to greater soil coverage), while between crop?s phases, coefficient values were always higher at the intermediate stage, presenting decreases with crop senescence. Soil evaporation was highest on treatment without coverage in all crop?s stages (Ke = 0.37-0.78) and lowest in the treatment with greater coverage (Ke = 0.11-0.35). Yields were higher on treatments with coverage (9929.18 and 9939.52 kg ha-1 for treatments with 4 and 8 t ha-1) and lower when cultivated in soil without cover (8264.67 kg ha-1). Despite ... Mostrar Tudo |
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Thesagro: |
Cerrado; Milho; Zea Mays. |
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Thesaurus NAL: |
Cerrado soils; Crop coefficient; Evaporation; Lysimeters; Soil water. |
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Categoria do assunto: |
A Sistemas de Cultivo |
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Marc: |
LEADER 02697naa a2200325 a 4500
001 2110476
005 2019-12-04
008 2019 bl uuuu u00u1 u #d
022 $a1916-9752
100 1 $aANDREA, M. C. da S.
245 $aEffect of soil coverage on dual crop coefficient of maize in a region of Mato Grosso, Brazil.$h[electronic resource]
260 $c2019
520 $aWith the objective of determining maize?s specific water requirements in different soil cover conditions in a Cerrado region of Mato Grosso, Brazil, this study used the dual?s crop coefficient (Kc dual) approach, according to FAO methods. An experiment was carried out in 2016, with three treatments: without vegetation soil cover; soil cover of 4 t ha-1 and soil cover of 8 t ha-1 dry matter of brachiaria grass. The used methodology accounts for crop?s transpiration component (through its basal coefficient, Kcb) and soil evaporation component (through its coefficient, Ke), which were determined for initial, intermediate and final phases of crop development. Experiments were carried in lysimeters to determine crop?s evapotranspiration, and in microlysimeters to determine soil evaporation. Crop?s transpiration, on three soil coverage treatments, showed overall highest values for the treatment with greater coverage (Kcb maximum values of 0.88, 1.00 and 1.03 from the lowest to greater soil coverage), while between crop?s phases, coefficient values were always higher at the intermediate stage, presenting decreases with crop senescence. Soil evaporation was highest on treatment without coverage in all crop?s stages (Ke = 0.37-0.78) and lowest in the treatment with greater coverage (Ke = 0.11-0.35). Yields were higher on treatments with coverage (9929.18 and 9939.52 kg ha-1 for treatments with 4 and 8 t ha-1) and lower when cultivated in soil without cover (8264.67 kg ha-1). Despite relatively higher crop?s transpiration with greater soil coverage, this treatment was identified as the best management option in the assessed tropical region of Brazilian Cerrado, in terms of rational use of water, due to lowest losses through evaporation, as also providing the highest grain yields.
650 $aCerrado soils
650 $aCrop coefficient
650 $aEvaporation
650 $aLysimeters
650 $aSoil water
650 $aCerrado
650 $aMilho
650 $aZea Mays
700 1 $aVIEIRA, F. F.
700 1 $aDALLACORT, R.
700 1 $aBARBIERI, J. D.
700 1 $aFREITAS, P. S. L. de
700 1 $aTIEPPO, R. C.
700 1 $aZOLIN, C. A.
700 1 $aKRAUSE, W.
700 1 $aDANIEL, D. F.
773 $tJournal of Agricultural Science$gv. 11, n. 14, p. 143-155, 2019.
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