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Registro Completo |
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Biblioteca(s): |
Embrapa Meio-Norte. |
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Data corrente: |
30/05/1996 |
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Data da última atualização: |
01/12/2014 |
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Autoria: |
CONDIT, R.; HUBBELL, S. P.; FORTER, R. B. |
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Título: |
Identifying fast-growing native trees from the Neotropics using data from a large, permanent census plot. |
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Ano de publicação: |
1993 |
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Fonte/Imprenta: |
Forest Ecology and Management, v. 62, n. 174, p. 123-143, 1993. |
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Idioma: |
Inglês |
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Conteúdo: |
To screen for rapidly growing trees, lifetime growth histories of 160 species were estimated from data collected in a permanent 50 ha census plot in tropical moist forest in Panama. Most of the 160 species had never been studied before in detail, and newly encountered species with rapid growth might provide better techniques for reforesting degraded soils in Central America. To estimate lifetime growth, polynominal regressions were fitted to instantaneous growth rates expressed as a function of log-transformed diameter at breast height (dbh). These functions represent a differential equation in dbh, and explicit solutions for the equations provided dbh trajectories as a function of age (starting at 1 cm dbh, which was the smallest size included in the cen-sus). Dbh trajectories were calculated for 160 species, and full growth data are presented for the 28 species that ranked among the fastest 15 to reach a dbh of 10, 30, or 60 cm. Dbh trajectories based on growth of one standard deviation above the mean were also estimated for these species by fitting a polynominal regression to the residuals around the original regression. The fastest-growing tree in the 50 ha plot was the balsa, Ochroma pyramidale, which reached 10 cm in 5 years and 30 cm in 10. Cavanillesia plantanifolia, Trema micrantha, Zanthoxylum belizense, and Vochysia ferruginea were the other top-ranking species. At mean growth, the top 15 ranking species required 5-25 years to reach 10 cm, 10-67 years to reach 30cm,and 32-111 years to reach 60cm. MenosTo screen for rapidly growing trees, lifetime growth histories of 160 species were estimated from data collected in a permanent 50 ha census plot in tropical moist forest in Panama. Most of the 160 species had never been studied before in detail, and newly encountered species with rapid growth might provide better techniques for reforesting degraded soils in Central America. To estimate lifetime growth, polynominal regressions were fitted to instantaneous growth rates expressed as a function of log-transformed diameter at breast height (dbh). These functions represent a differential equation in dbh, and explicit solutions for the equations provided dbh trajectories as a function of age (starting at 1 cm dbh, which was the smallest size included in the cen-sus). Dbh trajectories were calculated for 160 species, and full growth data are presented for the 28 species that ranked among the fastest 15 to reach a dbh of 10, 30, or 60 cm. Dbh trajectories based on growth of one standard deviation above the mean were also estimated for these species by fitting a polynominal regression to the residuals around the original regression. The fastest-growing tree in the 50 ha plot was the balsa, Ochroma pyramidale, which reached 10 cm in 5 years and 30 cm in 10. Cavanillesia plantanifolia, Trema micrantha, Zanthoxylum belizense, and Vochysia ferruginea were the other top-ranking species. At mean growth, the top 15 ranking species required 5-25 years to reach 10 cm, 10-67 years to reac... Mostrar Tudo |
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Thesagro: |
Crescimento; Floresta; Silvicultura. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02069naa a2200181 a 4500
001 1050733
005 2014-12-01
008 1993 bl --- 0-- u #d
100 1 $aCONDIT, R.
245 $aIdentifying fast-growing native trees from the Neotropics using data from a large, permanent census plot.
260 $c1993
520 $aTo screen for rapidly growing trees, lifetime growth histories of 160 species were estimated from data collected in a permanent 50 ha census plot in tropical moist forest in Panama. Most of the 160 species had never been studied before in detail, and newly encountered species with rapid growth might provide better techniques for reforesting degraded soils in Central America. To estimate lifetime growth, polynominal regressions were fitted to instantaneous growth rates expressed as a function of log-transformed diameter at breast height (dbh). These functions represent a differential equation in dbh, and explicit solutions for the equations provided dbh trajectories as a function of age (starting at 1 cm dbh, which was the smallest size included in the cen-sus). Dbh trajectories were calculated for 160 species, and full growth data are presented for the 28 species that ranked among the fastest 15 to reach a dbh of 10, 30, or 60 cm. Dbh trajectories based on growth of one standard deviation above the mean were also estimated for these species by fitting a polynominal regression to the residuals around the original regression. The fastest-growing tree in the 50 ha plot was the balsa, Ochroma pyramidale, which reached 10 cm in 5 years and 30 cm in 10. Cavanillesia plantanifolia, Trema micrantha, Zanthoxylum belizense, and Vochysia ferruginea were the other top-ranking species. At mean growth, the top 15 ranking species required 5-25 years to reach 10 cm, 10-67 years to reach 30cm,and 32-111 years to reach 60cm.
650 $aCrescimento
650 $aFloresta
650 $aSilvicultura
700 1 $aHUBBELL, S. P.
700 1 $aFORTER, R. B.
773 $tForest Ecology and Management$gv. 62, n. 174, p. 123-143, 1993.
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Registro original: |
Embrapa Meio-Norte (CPAMN) |
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Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Unidades Centrais. |
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Data corrente: |
27/07/1998 |
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Data da última atualização: |
27/02/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
STONE, L. F.; SILVA, J. G. da. |
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Afiliação: |
LUIS FERNANDO STONE, CNPAF; JOSE GERALDO DA SILVA, CNPAF. |
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Título: |
Resposta do arroz de sequeiro à profundidade de aração, adubação nitrogenada e condições hídricas do solo. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 33, n. 6, p. 891-897, jun. 1998. |
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ISSN: |
0100-204X |
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Idioma: |
Português |
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Conteúdo: |
Estudaram-se, por dois anos, os efeitos de doses (0,40 e 80 kg/ha de N) e metodos de aplicacao de N (todo na semeadura; 1/3 na semeadura e 2/3 na diferenciacao do primordio floral e 1/3 na semeadura e 2/3 na floracao), de profundidade de aracao (10-15 e 30-35 cm) e de condicoes hidricas (sem e com estresse) sobre a profundidade das cultivares de arroz de sequeiro (Oryza sativa L.), Rio Paranaiba e Maravilha, com o objetivo de determinar o manejo mais adequado do solo e da adubacao nitrogenada, sob deficiencia hidrica. Nesta condicao, o decrescimo na produtividade foi mais severo na cultivar Maravilha, por ser de sequeiro favorecido. Verificou-se que, na ausencia de camada compactada no perfil do solo, e recomendavel que a aracao seja feita a 10-15 cm de profundidade. A dose mais adequada de N foi de 40 kg/ha. Em regioes sujeitas a deficiencia hidrica deve-se parcelar a adubacao nitrogenada, aplicando 1/3 na semeadura e 2/3 no inicio da floracao. A cobertura com N so deve ser feita se a lavoura apresentar condicoes adequadas de desenvolvimento e houver agua no solo suficiente para suprir as plantas de arroz por, no minimo, dez dias apos o inicio da floracao. |
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Palavras-Chave: |
Estresse hidrico; Nitrogen split application; Parcelamento de nitrogenio; Preparo do solo; Soil preparation. |
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Thesagro: |
Arroz; Cerrado; Nitrogênio; Oryza Sativa; Solo. |
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Thesaurus NAL: |
rice; water stress. |
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Categoria do assunto: |
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F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/44638/1/pab007-96.pdf
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Marc: |
LEADER 02013naa a2200289 a 4500
001 1205339
005 2019-02-27
008 1998 bl uuuu u00u1 u #d
022 $a0100-204X
100 1 $aSTONE, L. F.
245 $aResposta do arroz de sequeiro à profundidade de aração, adubação nitrogenada e condições hídricas do solo.
260 $c1998
520 $aEstudaram-se, por dois anos, os efeitos de doses (0,40 e 80 kg/ha de N) e metodos de aplicacao de N (todo na semeadura; 1/3 na semeadura e 2/3 na diferenciacao do primordio floral e 1/3 na semeadura e 2/3 na floracao), de profundidade de aracao (10-15 e 30-35 cm) e de condicoes hidricas (sem e com estresse) sobre a profundidade das cultivares de arroz de sequeiro (Oryza sativa L.), Rio Paranaiba e Maravilha, com o objetivo de determinar o manejo mais adequado do solo e da adubacao nitrogenada, sob deficiencia hidrica. Nesta condicao, o decrescimo na produtividade foi mais severo na cultivar Maravilha, por ser de sequeiro favorecido. Verificou-se que, na ausencia de camada compactada no perfil do solo, e recomendavel que a aracao seja feita a 10-15 cm de profundidade. A dose mais adequada de N foi de 40 kg/ha. Em regioes sujeitas a deficiencia hidrica deve-se parcelar a adubacao nitrogenada, aplicando 1/3 na semeadura e 2/3 no inicio da floracao. A cobertura com N so deve ser feita se a lavoura apresentar condicoes adequadas de desenvolvimento e houver agua no solo suficiente para suprir as plantas de arroz por, no minimo, dez dias apos o inicio da floracao.
650 $arice
650 $awater stress
650 $aArroz
650 $aCerrado
650 $aNitrogênio
650 $aOryza Sativa
650 $aSolo
653 $aEstresse hidrico
653 $aNitrogen split application
653 $aParcelamento de nitrogenio
653 $aPreparo do solo
653 $aSoil preparation
700 1 $aSILVA, J. G. da
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 33, n. 6, p. 891-897, jun. 1998.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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