| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Amapá; Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Arroz e Feijão; Embrapa Unidades Centrais. |
|
Data corrente: |
27/01/1994 |
|
Data da última atualização: |
20/10/2023 |
|
Autoria: |
COUTO, W. S.; CORDEIRO, A. C. C.; ALVES, A. A. C. |
|
Afiliação: |
WALMIR SALLES COUTO, CPATU; ANTONIO CARLOS CENTENO CORDEIRO, UEPAT-BOA VISTA; ALFREDO AUGUSTO CUNHA ALVES, UEPAT-BOA VISTA. |
|
Título: |
Adubação mineral de arroz em latossolo de campo cerrado de Roraima. |
|
Ano de publicação: |
1982 |
|
Fonte/Imprenta: |
Belém, PA: EMBRAPA-CPATU, 1982. |
|
Páginas: |
3 p. |
|
Série: |
(EMBRAPA-CPATU. Pesquisa em andamento, 74). |
|
Idioma: |
Português |
|
Conteúdo: |
A falta de resultados de pesquisas com adubação de arroz, em solos de cerrado de Roraima, constitui um dos principais fatores de risco no processo de cultivo mecanizado dessa gramínea naquele Território. Procurando-se obter curavas de respostas para nitrogênio, fósforo, potássio e zinco, bem como determinar possíveis interações de importância econômica, foi instalado um experimento de arroz (cultivar IAC-47), em um latossolo amarelo de campo cerrado, textura média, de baixa fertilidade, utilizando-se as doses de nitrogênio, fósforo, potássio e zinco. |
|
Palavras-Chave: |
Adubação mineral; Brasil; Fertilização; Mineral nutrients; Roraima; Zincsulphate. |
|
Thesagro: |
Análise Econômica; Arroz; Cerrado; Cloreto de Potássio; Nutriente Mineral; Oryza Sativa; Produção; Sulfato de Zinco; Superfosfato Triplo; Uréia. |
|
Thesaurus Nal: |
Amazonia; economic analysis; potassium chloride; rice; superphosphate; urea. |
|
Categoria do assunto: |
--
F Plantas e Produtos de Origem Vegetal |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/60093/1/CPATU-PA74.pdf
|
|
Marc: |
LEADER 01666nam a2200421 a 4500
001 1380935
005 2023-10-20
008 1982 bl uuuu u0uu1 u #d
100 1 $aCOUTO, W. S.
245 $aAdubação mineral de arroz em latossolo de campo cerrado de Roraima.
260 $aBelém, PA: EMBRAPA-CPATU$c1982
300 $a3 p.
490 $a(EMBRAPA-CPATU. Pesquisa em andamento, 74).
520 $aA falta de resultados de pesquisas com adubação de arroz, em solos de cerrado de Roraima, constitui um dos principais fatores de risco no processo de cultivo mecanizado dessa gramínea naquele Território. Procurando-se obter curavas de respostas para nitrogênio, fósforo, potássio e zinco, bem como determinar possíveis interações de importância econômica, foi instalado um experimento de arroz (cultivar IAC-47), em um latossolo amarelo de campo cerrado, textura média, de baixa fertilidade, utilizando-se as doses de nitrogênio, fósforo, potássio e zinco.
650 $aAmazonia
650 $aeconomic analysis
650 $apotassium chloride
650 $arice
650 $asuperphosphate
650 $aurea
650 $aAnálise Econômica
650 $aArroz
650 $aCerrado
650 $aCloreto de Potássio
650 $aNutriente Mineral
650 $aOryza Sativa
650 $aProdução
650 $aSulfato de Zinco
650 $aSuperfosfato Triplo
650 $aUréia
653 $aAdubação mineral
653 $aBrasil
653 $aFertilização
653 $aMineral nutrients
653 $aRoraima
653 $aZincsulphate
700 1 $aCORDEIRO, A. C. C.
700 1 $aALVES, A. A. C.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Amazônia Oriental (CPATU) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
 | 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. |
|
Data corrente: |
21/08/2006 |
|
Data da última atualização: |
28/11/2022 |
|
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. |
|
Afiliação: |
JOSÉ NATALINO MACEDO SILVA, CPATU. |
|
Título: |
Concerted changes in tropical forest structure and dynamics: evidence from 50 South American long-term plots. |
|
Ano de publicação: |
2004 |
|
Fonte/Imprenta: |
Philippine Transactions of Royal Society of London, B, v. 359, n. 1443, p. 421-436, 2004. |
|
DOI: |
10.1098/rstb.2003.1431 |
|
Idioma: |
Inglês |
|
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 |
|
Palavras-Chave: |
Brasil. |
|
Thesagro: |
Biomassa; Carbono; Desenvolvimento Florestal; Floresta Tropical; Mortalidade. |
|
Thesaurus NAL: |
Amazonia. |
|
Categoria do assunto: |
-- |
|
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.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Amazônia Oriental (CPATU) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
