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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Trigo. |
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Data corrente: |
18/12/1995 |
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Data da última atualização: |
29/11/1999 |
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Autoria: |
MIRANDA, L. N. de. |
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Título: |
Aluminium - phosphate interactions in relation to wheat growth. |
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Ano de publicação: |
1985 |
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Fonte/Imprenta: |
[Reading]: University of Reading, 1985. |
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Páginas: |
169p. |
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Idioma: |
Inglês |
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Notas: |
Ph.D.Thesis. |
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Conteúdo: |
The effects of al on plant growth and nutrient uptake of wheat varieties with different degrees of sensitivity to aluminium were studied, as well as the Al interferences with P translocation within the plant ans the P chemical status in the plant root. This research also studied the effects of lime on plant growth and on plant nutrient uptake efficiency and investigated the plant's ability to use P to promote root grawth in an acid subsoil with aluminium. In sand culture with Al plant yield was closely related to P inflow. The wheat varieties differed mostly in the Al:P inflow ratio and for the same amount of Al taken up the Al-tolerant varieties absorbed two to four times more P. Liming am acid soil reduced the uptake of Al, improved plant growth and increased the plant uptake of P and K per unit of root length for both Al-tolerant and -sensitive wheat varieties. In the absence of lime the plantas had a higher content and concentration of P in the roots than in the shoots. Also for each mol of Al taken up the Al-tolerant plants absorbed three times more P than the Al-sensitive variety. In nutrient solution without Al, the Al-tolerant variety produced maximum yield at lower P supply and also absorbed more P and translocated more P to the shoots than the Al-sensitive variety. For plants with high root P content, Al reduced P translocations to the shoots and for plants with low root P, Al promoted a downward movement of P from the shoots to the roots. The P retained in the plant roots increased linearly with root Al content, and it was partially exchangeable with P from the external medium. Root P was mostly located in the cell cytoplasm while Al was equally distributed between root cell walls and cell cytoplasm. With the retained in the roots due to Al was translocated to the shoots. Also the uptake of P was smaller according to the previous Al leves for the Al-sensitive wheat variety. In soil columns simulating different topsoil and subsoil conditions the wheat varieties had their growth reduced by subsoil acidity. Shoot growth and subsoil root growth were increased by liming the subsoil but they were limited by the low soil P level. Addition of phoshorus in the topsoil promoted shoot growth and root growth in both soil layers regardless of the subsoil acidity. P was translocated to the roots growing in the subsoil and seem to have romoved Al restrictions by rendering Al harmless within the plant roots. MenosThe effects of al on plant growth and nutrient uptake of wheat varieties with different degrees of sensitivity to aluminium were studied, as well as the Al interferences with P translocation within the plant ans the P chemical status in the plant root. This research also studied the effects of lime on plant growth and on plant nutrient uptake efficiency and investigated the plant's ability to use P to promote root grawth in an acid subsoil with aluminium. In sand culture with Al plant yield was closely related to P inflow. The wheat varieties differed mostly in the Al:P inflow ratio and for the same amount of Al taken up the Al-tolerant varieties absorbed two to four times more P. Liming am acid soil reduced the uptake of Al, improved plant growth and increased the plant uptake of P and K per unit of root length for both Al-tolerant and -sensitive wheat varieties. In the absence of lime the plantas had a higher content and concentration of P in the roots than in the shoots. Also for each mol of Al taken up the Al-tolerant plants absorbed three times more P than the Al-sensitive variety. In nutrient solution without Al, the Al-tolerant variety produced maximum yield at lower P supply and also absorbed more P and translocated more P to the shoots than the Al-sensitive variety. For plants with high root P content, Al reduced P translocations to the shoots and for plants with low root P, Al promoted a downward movement of P from the shoots to the roots. The P retained in the pl... Mostrar Tudo |
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Palavras-Chave: |
Aluminium; Growth; Nutrient; Wheats. |
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Thesagro: |
Absorção; Alumínio; Calagem; Crescimento; Fisiologia Vegetal; Fósforo; Solo; Trigo; Triticum Aestivum. |
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Thesaurus Nal: |
liming; nutrient uptake; phosphates; plant physiology; soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03281nam a2200349 a 4500
001 1559432
005 1999-11-29
008 1985 bl uuuu m 00u1 u #d
100 1 $aMIRANDA, L. N. de
245 $aAluminium - phosphate interactions in relation to wheat growth.
260 $a[Reading]: University of Reading$c1985
300 $a169p.
500 $aPh.D.Thesis.
520 $aThe effects of al on plant growth and nutrient uptake of wheat varieties with different degrees of sensitivity to aluminium were studied, as well as the Al interferences with P translocation within the plant ans the P chemical status in the plant root. This research also studied the effects of lime on plant growth and on plant nutrient uptake efficiency and investigated the plant's ability to use P to promote root grawth in an acid subsoil with aluminium. In sand culture with Al plant yield was closely related to P inflow. The wheat varieties differed mostly in the Al:P inflow ratio and for the same amount of Al taken up the Al-tolerant varieties absorbed two to four times more P. Liming am acid soil reduced the uptake of Al, improved plant growth and increased the plant uptake of P and K per unit of root length for both Al-tolerant and -sensitive wheat varieties. In the absence of lime the plantas had a higher content and concentration of P in the roots than in the shoots. Also for each mol of Al taken up the Al-tolerant plants absorbed three times more P than the Al-sensitive variety. In nutrient solution without Al, the Al-tolerant variety produced maximum yield at lower P supply and also absorbed more P and translocated more P to the shoots than the Al-sensitive variety. For plants with high root P content, Al reduced P translocations to the shoots and for plants with low root P, Al promoted a downward movement of P from the shoots to the roots. The P retained in the plant roots increased linearly with root Al content, and it was partially exchangeable with P from the external medium. Root P was mostly located in the cell cytoplasm while Al was equally distributed between root cell walls and cell cytoplasm. With the retained in the roots due to Al was translocated to the shoots. Also the uptake of P was smaller according to the previous Al leves for the Al-sensitive wheat variety. In soil columns simulating different topsoil and subsoil conditions the wheat varieties had their growth reduced by subsoil acidity. Shoot growth and subsoil root growth were increased by liming the subsoil but they were limited by the low soil P level. Addition of phoshorus in the topsoil promoted shoot growth and root growth in both soil layers regardless of the subsoil acidity. P was translocated to the roots growing in the subsoil and seem to have romoved Al restrictions by rendering Al harmless within the plant roots.
650 $aliming
650 $anutrient uptake
650 $aphosphates
650 $aplant physiology
650 $asoil
650 $aAbsorção
650 $aAlumínio
650 $aCalagem
650 $aCrescimento
650 $aFisiologia Vegetal
650 $aFósforo
650 $aSolo
650 $aTrigo
650 $aTriticum Aestivum
653 $aAluminium
653 $aGrowth
653 $aNutrient
653 $aWheats
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Registro original: |
Embrapa Cerrados (CPAC) |
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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
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
26/07/2023 |
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Data da última atualização: |
26/07/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 4 |
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Autoria: |
VEDOVATO, L. B.; CARVALHO, L. C. S.; ARAGÃO, L. E. O. C.; BIRD, M.; PHILLIPS, O. L.; ALVAREZ, P.; BARLOW, J.; BARTHOLOMEW, D. C.; BERENGUER, E.; CASTRO, W.; FERREIRA, J. N.; FRANÇA, F. M.; MALHI, Y.; MARIMON, B.; MARIMON JÚNIOR, B. H.; MONTEAGUDO, A.; OLIVEIRA, E. A.; PEREIRA, L. O.; PONTES-LOPES, A.; QUESADA, C. A.; SILVA, C. V. J.; ESPEJO, J. E. S.; SILVEIRA, M.; FELDPAUSCH, T. R. |
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Afiliação: |
LAURA B. VEDOVATO, UNIVERSITY OF EXETER; LIDIANY C. S. CARVALHO, UNIVERSITY OF EXETER; LUIZ E. O. C. ARAGÃO, UNIVERSITY OF EXETER; MICHAEL BIRD, JAMES COOK UNIVERSITY; OLIVER L. PHILLIPS, UNIVERSITY OF LEEDS; PATRÍCIA ALVAREZ, DUKE UNIVERSITY; JOS BARLOW, LANCASTER UNIVERSITY; DAVID C. BARTHOLOMEW, UNIVERSITY OF EXETER; ERIKA BERENGUER, LANCASTER UNIVERSITY; WENDESON CASTRO, UNIVERSIDADE FEDERAL DO ACRE; JOICE NUNES FERREIRA, CPATU; FILIPE M. FRANÇA, UNIVERSITY OF BRISTOL; YADVINDER MALHI, UNIVERSITY OF OXFORD; BEATRIZ MARIMON, UNIVERSIDADE DO ESTADO DE MATO GROSSO; BEN HUR MARIMON JÚNIOR, UNIVERSIDADE DO ESTADO DE MATO GROSSO; ABEL MONTEAGUDO, UNIVERSIDAD NACIONAL DE SAN ANTONIO ABAD DEL CUSCO; EDMAR A. OLIVEIRA, UNIVERSIDADE DO ESTADO DE MATO GROSSO; LUCIANA O. PEREIRA, UNIVERSITY OF EXETER; ALINE PONTES-LOPES, INSTITUTO NACIONAL DE PESQUISAS ESPACIAIS; CARLOS A. QUESADA, INSTITUTO NACIONAL DE PESQUISAS DA AMAZÔNIA; CAMILA V. J. SILVA, INSTITUTO DE PESQUISA AMBIENTAL DA AMAZÔNIA; JAVIER E. SILVA ESPEJO, UNIVERSIDAD DE LA SERENA; MARCOS SILVEIRA, UNIVERSIDADE FEDERAL DO ACRE; TED R. FELDPAUSCH, UNIVERSITY OF EXETER. |
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Título: |
Ancient fires enhance Amazon forest drought resistance. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Frontiers in Forests and Global Change, v. 6, 1024101, 2023. |
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DOI: |
https://doi.org/10.3389/ffgc.2023.1024101 |
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Idioma: |
Inglês |
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Conteúdo: |
Drought and fire reduce productivity and increase tree mortality in tropical forests. Fires also produce pyrogenic carbon (PyC), which persists in situ for centuries to millennia, and represents a legacy of past fires, potentially improving soil fertility and water holding capacity and selecting for the survival and recruitment of certain tree life-history (or successional) strategies. We investigated whether PyC is correlated with physicochemical soil properties, wood density, aboveground carbon (AGC) dynamics and forest resistance to severe drought. To achieve our aim, we used an Amazon-wide, long-term plot network, in forests without known recent fires, integrating site-specific measures of forest dynamics, soil properties and a unique soil PyC concentration database. We found that forests with higher concentrations of soil PyC had both higher soil fertility and lower wood density. Soil PyC was not associated with AGC dynamics in non-drought years. However, during extreme drought events (10% driest years), forests with higher concentrations of soil PyC experienced lower reductions in AGC gains (woody growth and recruitment), with this drought-immunizing effect increasing with drought severity. Forests with a legacy of ancient fires are therefore more likely to continue to grow and recruit under increased drought severity. Forests with high soil PyC concentrations (third quartile) had 3.8% greater AGC gains under mean drought, but 33.7% greater under the most extreme drought than forests with low soil PyC concentrations (first quartile), offsetting losses of up to 0.68 Mg C ha?1yr?1 of AGC under extreme drought events. This suggests that ancient fires have legacy effects on current forest dynamics, by altering soil fertility and favoring tree species capable of continued growth and recruitment during droughts. Therefore, mature forest that experienced fires centuries or millennia ago may have greater resistance to current short-term droughts. MenosDrought and fire reduce productivity and increase tree mortality in tropical forests. Fires also produce pyrogenic carbon (PyC), which persists in situ for centuries to millennia, and represents a legacy of past fires, potentially improving soil fertility and water holding capacity and selecting for the survival and recruitment of certain tree life-history (or successional) strategies. We investigated whether PyC is correlated with physicochemical soil properties, wood density, aboveground carbon (AGC) dynamics and forest resistance to severe drought. To achieve our aim, we used an Amazon-wide, long-term plot network, in forests without known recent fires, integrating site-specific measures of forest dynamics, soil properties and a unique soil PyC concentration database. We found that forests with higher concentrations of soil PyC had both higher soil fertility and lower wood density. Soil PyC was not associated with AGC dynamics in non-drought years. However, during extreme drought events (10% driest years), forests with higher concentrations of soil PyC experienced lower reductions in AGC gains (woody growth and recruitment), with this drought-immunizing effect increasing with drought severity. Forests with a legacy of ancient fires are therefore more likely to continue to grow and recruit under increased drought severity. Forests with high soil PyC concentrations (third quartile) had 3.8% greater AGC gains under mean drought, but 33.7% greater under the most extreme droug... Mostrar Tudo |
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Palavras-Chave: |
Carbono pirogênico do solo; Composição florestal; Déficit hídrico; Sequestro de carbono. |
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Thesagro: |
Densidade da Madeira; Fertilidade do Solo. |
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Thesaurus NAL: |
Carbon sequestration; Soil fertility; Soil water deficit; Wood density. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 03482naa a2200529 a 4500
001 2155313
005 2023-07-26
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.3389/ffgc.2023.1024101$2DOI
100 1 $aVEDOVATO, L. B.
245 $aAncient fires enhance Amazon forest drought resistance.$h[electronic resource]
260 $c2023
520 $aDrought and fire reduce productivity and increase tree mortality in tropical forests. Fires also produce pyrogenic carbon (PyC), which persists in situ for centuries to millennia, and represents a legacy of past fires, potentially improving soil fertility and water holding capacity and selecting for the survival and recruitment of certain tree life-history (or successional) strategies. We investigated whether PyC is correlated with physicochemical soil properties, wood density, aboveground carbon (AGC) dynamics and forest resistance to severe drought. To achieve our aim, we used an Amazon-wide, long-term plot network, in forests without known recent fires, integrating site-specific measures of forest dynamics, soil properties and a unique soil PyC concentration database. We found that forests with higher concentrations of soil PyC had both higher soil fertility and lower wood density. Soil PyC was not associated with AGC dynamics in non-drought years. However, during extreme drought events (10% driest years), forests with higher concentrations of soil PyC experienced lower reductions in AGC gains (woody growth and recruitment), with this drought-immunizing effect increasing with drought severity. Forests with a legacy of ancient fires are therefore more likely to continue to grow and recruit under increased drought severity. Forests with high soil PyC concentrations (third quartile) had 3.8% greater AGC gains under mean drought, but 33.7% greater under the most extreme drought than forests with low soil PyC concentrations (first quartile), offsetting losses of up to 0.68 Mg C ha?1yr?1 of AGC under extreme drought events. This suggests that ancient fires have legacy effects on current forest dynamics, by altering soil fertility and favoring tree species capable of continued growth and recruitment during droughts. Therefore, mature forest that experienced fires centuries or millennia ago may have greater resistance to current short-term droughts.
650 $aCarbon sequestration
650 $aSoil fertility
650 $aSoil water deficit
650 $aWood density
650 $aDensidade da Madeira
650 $aFertilidade do Solo
653 $aCarbono pirogênico do solo
653 $aComposição florestal
653 $aDéficit hídrico
653 $aSequestro de carbono
700 1 $aCARVALHO, L. C. S.
700 1 $aARAGÃO, L. E. O. C.
700 1 $aBIRD, M.
700 1 $aPHILLIPS, O. L.
700 1 $aALVAREZ, P.
700 1 $aBARLOW, J.
700 1 $aBARTHOLOMEW, D. C.
700 1 $aBERENGUER, E.
700 1 $aCASTRO, W.
700 1 $aFERREIRA, J. N.
700 1 $aFRANÇA, F. M.
700 1 $aMALHI, Y.
700 1 $aMARIMON, B.
700 1 $aMARIMON JÚNIOR, B. H.
700 1 $aMONTEAGUDO, A.
700 1 $aOLIVEIRA, E. A.
700 1 $aPEREIRA, L. O.
700 1 $aPONTES-LOPES, A.
700 1 $aQUESADA, C. A.
700 1 $aSILVA, C. V. J.
700 1 $aESPEJO, J. E. S.
700 1 $aSILVEIRA, M.
700 1 $aFELDPAUSCH, T. R.
773 $tFrontiers in Forests and Global Change$gv. 6, 1024101, 2023.
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