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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
09/05/2005 |
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Data da última atualização: |
09/05/2005 |
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Autoria: |
BALIEIRO, F. de C; DIAS, L. E.; FRANCO, A. A.; CAMPELLO, E. F. C.; FARIA, S. M. de. |
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Título: |
Acúmulo de nutrientes na parte aérea, na serapilheira acumulada sobre o solo e decomposição de filódios de Acacia mangium Willd. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Ciências Florestal, Santa Maria, v. 14, n. 1, p. 59-65, 2004. |
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Idioma: |
Português |
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Notas: |
Nutrient accumulation in the aboveground biomass, in the litter layer and phyllodies decomposition of Acacia mangium Willd. |
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Conteúdo: |
O acúmulo de N, P, K, Ca, Mg nos tecidos da parte aérea e na serapilheira sobre o solo, bem como a velocidade de decomposição de filódios e a eficiência de uso de nutrientes (CUB) da Acacia mangium Willd (mangium) foram avaliados num povoamento localizado em Seropédica, RJ. A espécie apresentou elevada eficiência de uso dos nutrientes, acumulando, aos cinco anos, grande quantidade de biomassa em sua parte aérea (135 t. há -1) e contendo: 544,9 kg.há-1 de N; 281,7 kg há-1 de Ca; 242,9 kg.há-1 de K; 47 kg.há-1 de Mg e 35,2 kg.há-1 de P. Na serapilheira acumulada sobre o solo (12,7t.há-1), foram encontradas reservas significativas dos nutrientes (251,0; 102,7 e 22,7 kg.há-1 de N, P, K, Ca e Mg respectivamente). A constante de decomposição (K) foi estimada em 0,00165 g.g-1.dia-1 e o tempo de meia vida dos filódios em 421 dias. A acumulação de serapilheira pode ser positiva no sentido de constituir reserva de nutrientes para cultivos em sucessão, mas também pode representar uma desvantagem, por servir como combustível em áreas sujeitas a queimadas.
Nutrient concentrations and contents in the shoot (leaves, branches, brak and wood) in a five-yars-old stand of Acacia mangium Willd. (mangium), decomposition rate of mangium phyllodies (modified leaves) and nutrient efficiency use were evaluated i a forest stand in Seropédica, Rio de Janeiro State, Brazil. The species presented a high nutrient use efficency and accumulated 135 t.há-1 of above ground biomass, comtaining: 544.9 kg.há-1 of N, 281.7 kg.há-1 of Ca, 242.9 kg há-1 of K, 47 kg.há-1 of Mg and 35.2 kg. Há-1 of P.. There was an accumulation of 12.7 tha-1 of litter and this layer contained 251.0, 5.7, 14.6, 102.7 and 22.7 kg há-1 , respectively, of N, P, K, Ca, Mg. The decomposition constant (k) estimated fpr the phyllodies decomposition was 0,00165 g.g-1.day-1 and the half-live was 421 days. THE accumulation of litter on the ground may represent an advantage as supply for succeeding or disadvantage as fuel in areassubject to frequent fire. MenosO acúmulo de N, P, K, Ca, Mg nos tecidos da parte aérea e na serapilheira sobre o solo, bem como a velocidade de decomposição de filódios e a eficiência de uso de nutrientes (CUB) da Acacia mangium Willd (mangium) foram avaliados num povoamento localizado em Seropédica, RJ. A espécie apresentou elevada eficiência de uso dos nutrientes, acumulando, aos cinco anos, grande quantidade de biomassa em sua parte aérea (135 t. há -1) e contendo: 544,9 kg.há-1 de N; 281,7 kg há-1 de Ca; 242,9 kg.há-1 de K; 47 kg.há-1 de Mg e 35,2 kg.há-1 de P. Na serapilheira acumulada sobre o solo (12,7t.há-1), foram encontradas reservas significativas dos nutrientes (251,0; 102,7 e 22,7 kg.há-1 de N, P, K, Ca e Mg respectivamente). A constante de decomposição (K) foi estimada em 0,00165 g.g-1.dia-1 e o tempo de meia vida dos filódios em 421 dias. A acumulação de serapilheira pode ser positiva no sentido de constituir reserva de nutrientes para cultivos em sucessão, mas também pode representar uma desvantagem, por servir como combustível em áreas sujeitas a queimadas.
Nutrient concentrations and contents in the shoot (leaves, branches, brak and wood) in a five-yars-old stand of Acacia mangium Willd. (mangium), decomposition rate of mangium phyllodies (modified leaves) and nutrient efficiency use were evaluated i a forest stand in Seropédica, Rio de Janeiro State, Brazil. The species presented a high nutrient use efficency and accumulated 135 t.há-1 of above ground biomass, comtaining: 544.9 kg.... Mostrar Tudo |
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Palavras-Chave: |
Decomposition. |
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Thesagro: |
Biomassa; Decomposição. |
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Thesaurus Nal: |
Acacia mangium; biomass. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02893naa a2200241 a 4500
001 1628153
005 2005-05-09
008 2004 bl --- 0-- u #d
100 1 $aBALIEIRO, F. de C
245 $aAcúmulo de nutrientes na parte aérea, na serapilheira acumulada sobre o solo e decomposição de filódios de Acacia mangium Willd.
260 $c2004
500 $aNutrient accumulation in the aboveground biomass, in the litter layer and phyllodies decomposition of Acacia mangium Willd.
520 $aO acúmulo de N, P, K, Ca, Mg nos tecidos da parte aérea e na serapilheira sobre o solo, bem como a velocidade de decomposição de filódios e a eficiência de uso de nutrientes (CUB) da Acacia mangium Willd (mangium) foram avaliados num povoamento localizado em Seropédica, RJ. A espécie apresentou elevada eficiência de uso dos nutrientes, acumulando, aos cinco anos, grande quantidade de biomassa em sua parte aérea (135 t. há -1) e contendo: 544,9 kg.há-1 de N; 281,7 kg há-1 de Ca; 242,9 kg.há-1 de K; 47 kg.há-1 de Mg e 35,2 kg.há-1 de P. Na serapilheira acumulada sobre o solo (12,7t.há-1), foram encontradas reservas significativas dos nutrientes (251,0; 102,7 e 22,7 kg.há-1 de N, P, K, Ca e Mg respectivamente). A constante de decomposição (K) foi estimada em 0,00165 g.g-1.dia-1 e o tempo de meia vida dos filódios em 421 dias. A acumulação de serapilheira pode ser positiva no sentido de constituir reserva de nutrientes para cultivos em sucessão, mas também pode representar uma desvantagem, por servir como combustível em áreas sujeitas a queimadas. Nutrient concentrations and contents in the shoot (leaves, branches, brak and wood) in a five-yars-old stand of Acacia mangium Willd. (mangium), decomposition rate of mangium phyllodies (modified leaves) and nutrient efficiency use were evaluated i a forest stand in Seropédica, Rio de Janeiro State, Brazil. The species presented a high nutrient use efficency and accumulated 135 t.há-1 of above ground biomass, comtaining: 544.9 kg.há-1 of N, 281.7 kg.há-1 of Ca, 242.9 kg há-1 of K, 47 kg.há-1 of Mg and 35.2 kg. Há-1 of P.. There was an accumulation of 12.7 tha-1 of litter and this layer contained 251.0, 5.7, 14.6, 102.7 and 22.7 kg há-1 , respectively, of N, P, K, Ca, Mg. The decomposition constant (k) estimated fpr the phyllodies decomposition was 0,00165 g.g-1.day-1 and the half-live was 421 days. THE accumulation of litter on the ground may represent an advantage as supply for succeeding or disadvantage as fuel in areassubject to frequent fire.
650 $aAcacia mangium
650 $abiomass
650 $aBiomassa
650 $aDecomposição
653 $aDecomposition
700 1 $aDIAS, L. E.
700 1 $aFRANCO, A. A.
700 1 $aCAMPELLO, E. F. C.
700 1 $aFARIA, S. M. de
773 $tCiências Florestal, Santa Maria$gv. 14, n. 1, p. 59-65, 2004.
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Embrapa Agrobiologia (CNPAB) |
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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: |
21/08/2006 |
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Data da última atualização: |
28/11/2022 |
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Autoria: |
LEWIS, S. L.; PHILLIPS, O. L.; BAKER, T. R.; LLOYD, J.; MALHI, Y.; ALMEIDA, S.; HIGUCHI, N.; LAURANCE, W. F.; NEILL, D. A.; SILVA, J. N. M.; TERBORGH, J.; LEZAMA, A. T.; VÁSQUEZ MARTÍNEZ, R.; BROWN, S.; CHAVE, J.; KUEBLER, C.; NÚÑEZ VARGAS, P.; VINCETI, B. |
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Afiliação: |
JOSÉ NATALINO MACEDO SILVA, CPATU. |
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Título: |
Concerted changes in tropical forest structure and dynamics: evidence from 50 South American long-term plots. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Philippine Transactions of Royal Society of London, B, v. 359, n. 1443, p. 421-436, 2004. |
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DOI: |
10.1098/rstb.2003.1431 |
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Idioma: |
Inglês |
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Conteúdo: |
Several widespread changes in the ecology of old?growth tropical forests have recently been documented for the late twentieth century, in particular an increase in stem turnover (pan?tropical), and an increase in above?ground biomass (neotropical). Whether these changes are synchronous and whether changes in growth are also occurring is not known. We analysed stand?level changes within 50 long?term monitoring plots from across South America spanning 1971?2002. We show that: (i) basal area (BA: sum of the cross?sectional areas of all trees in a plot) increased significantly over time (by 0.10 ±; 0.04 m2 ha−1 yr−1, mean ± 95%CI) as did both (ii) stand?level BA growth rates (sum of the increments of BA of surviving trees and BA of new trees that recruited into a plot); and (iii) stand?level BA mortality rates (sum of the cross?sectional areas of all trees that died in a plot). Similar patterns were observed on a per?stem basis: (i) stem density (number of stems per hectare; 1 hectare is 104 m2) increased significantly over time (0.94 ± 0.63 stems ha−1 yr−1); as did both (ii) stem recruitment rates; and (iii) stem mortality rates. In relative terms, the pools of BA and stem density increased by 0.38 ± 0.15% and 0.18 ± 0.12% yr−1, respectively. The fluxes into and out of these pools?stand?level BA growth, stand?level BA mortality, stem recruitment and stem mortality rates?increased, in relative terms, by an order of magnitude more. The gain terms (BA growth, stem recruitment) consistently exceeded the loss terms (BA loss, stem mortality) throughout the period, suggesting that whatever process is driving these changes was already acting before the plot network was established. Large long?term increases in stand?level BA growth and simultaneous increases in stand BA and stem density imply a continent?wide increase in resource availability which is increasing net primary productivity and altering forest dynamics. Continent?wide changes in incoming solar radiation, and increases in atmospheric concentrations of CO2 and air temperatures may have increased resource supply over recent decades, thus causing accelerated growth and increased dynamism across the world's largest tract of tropical forest. MenosSeveral widespread changes in the ecology of old?growth tropical forests have recently been documented for the late twentieth century, in particular an increase in stem turnover (pan?tropical), and an increase in above?ground biomass (neotropical). Whether these changes are synchronous and whether changes in growth are also occurring is not known. We analysed stand?level changes within 50 long?term monitoring plots from across South America spanning 1971?2002. We show that: (i) basal area (BA: sum of the cross?sectional areas of all trees in a plot) increased significantly over time (by 0.10 ±; 0.04 m2 ha−1 yr−1, mean ± 95%CI) as did both (ii) stand?level BA growth rates (sum of the increments of BA of surviving trees and BA of new trees that recruited into a plot); and (iii) stand?level BA mortality rates (sum of the cross?sectional areas of all trees that died in a plot). Similar patterns were observed on a per?stem basis: (i) stem density (number of stems per hectare; 1 hectare is 104 m2) increased significantly over time (0.94 ± 0.63 stems ha−1 yr−1); as did both (ii) stem recruitment rates; and (iii) stem mortality rates. In relative terms, the pools of BA and stem density increased by 0.38 ± 0.15% and 0.18 ± 0.12% yr−1, respectively. The fluxes into and out of these pools?stand?level BA growth, stand?level BA mortality, stem recruitment and stem mortality rates?increased, in relative terms, by an order of magnitude more. The gain terms (BA... Mostrar Tudo |
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Palavras-Chave: |
Brasil. |
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Thesagro: |
Biomassa; Carbono; Desenvolvimento Florestal; Floresta Tropical; Mortalidade. |
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Thesaurus NAL: |
Amazonia. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03453naa a2200421 a 4500
001 1408525
005 2022-11-28
008 2004 bl uuuu u00u1 u #d
024 7 $a10.1098/rstb.2003.1431$2DOI
100 1 $aLEWIS, S. L.
245 $aConcerted changes in tropical forest structure and dynamics$bevidence from 50 South American long-term plots.$h[electronic resource]
260 $c2004
520 $aSeveral widespread changes in the ecology of old?growth tropical forests have recently been documented for the late twentieth century, in particular an increase in stem turnover (pan?tropical), and an increase in above?ground biomass (neotropical). Whether these changes are synchronous and whether changes in growth are also occurring is not known. We analysed stand?level changes within 50 long?term monitoring plots from across South America spanning 1971?2002. We show that: (i) basal area (BA: sum of the cross?sectional areas of all trees in a plot) increased significantly over time (by 0.10 ±; 0.04 m2 ha−1 yr−1, mean ± 95%CI) as did both (ii) stand?level BA growth rates (sum of the increments of BA of surviving trees and BA of new trees that recruited into a plot); and (iii) stand?level BA mortality rates (sum of the cross?sectional areas of all trees that died in a plot). Similar patterns were observed on a per?stem basis: (i) stem density (number of stems per hectare; 1 hectare is 104 m2) increased significantly over time (0.94 ± 0.63 stems ha−1 yr−1); as did both (ii) stem recruitment rates; and (iii) stem mortality rates. In relative terms, the pools of BA and stem density increased by 0.38 ± 0.15% and 0.18 ± 0.12% yr−1, respectively. The fluxes into and out of these pools?stand?level BA growth, stand?level BA mortality, stem recruitment and stem mortality rates?increased, in relative terms, by an order of magnitude more. The gain terms (BA growth, stem recruitment) consistently exceeded the loss terms (BA loss, stem mortality) throughout the period, suggesting that whatever process is driving these changes was already acting before the plot network was established. Large long?term increases in stand?level BA growth and simultaneous increases in stand BA and stem density imply a continent?wide increase in resource availability which is increasing net primary productivity and altering forest dynamics. Continent?wide changes in incoming solar radiation, and increases in atmospheric concentrations of CO2 and air temperatures may have increased resource supply over recent decades, thus causing accelerated growth and increased dynamism across the world's largest tract of tropical forest.
650 $aAmazonia
650 $aBiomassa
650 $aCarbono
650 $aDesenvolvimento Florestal
650 $aFloresta Tropical
650 $aMortalidade
653 $aBrasil
700 1 $aPHILLIPS, O. L.
700 1 $aBAKER, T. R.
700 1 $aLLOYD, J.
700 1 $aMALHI, Y.
700 1 $aALMEIDA, S.
700 1 $aHIGUCHI, N.
700 1 $aLAURANCE, W. F.
700 1 $aNEILL, D. A.
700 1 $aSILVA, J. N. M.
700 1 $aTERBORGH, J.
700 1 $aLEZAMA, A. T.
700 1 $aVÁSQUEZ MARTÍNEZ, R.
700 1 $aBROWN, S.
700 1 $aCHAVE, J.
700 1 $aKUEBLER, C.
700 1 $aNÚÑEZ VARGAS, P.
700 1 $aVINCETI, B.
773 $tPhilippine Transactions of Royal Society of London, B$gv. 359, n. 1443, p. 421-436, 2004.
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