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Registro Completo |
Biblioteca(s): |
Embrapa Trigo. |
Data corrente: |
11/10/2005 |
Data da última atualização: |
01/11/2019 |
Autoria: |
NASCIMENTO JUNIOR, A. do. |
Afiliação: |
Alfredo do Nascimento Junior. |
Título: |
Agentes mutagênicos e a intensidade de variabilidade genética em caracteres adaptativos na cultura da aveia (Avena sativa L.). |
Ano de publicação: |
1990 |
Fonte/Imprenta: |
Dissertação (Mestrado em Fitotecnia - Plantas de Lavoura) - Universidade Federal do Rio Grande do Sul, Porto Alegre. |
Páginas: |
79 p. |
Idioma: |
Português |
Thesagro: |
Aveia. |
Thesaurus Nal: |
Breeding; Oats. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00539nam a2200145 a 4500 001 1842284 005 2019-11-01 008 1990 bl uuuu m 00u1 u #d 100 1 $aNASCIMENTO JUNIOR, A. do 245 $aAgentes mutagênicos e a intensidade de variabilidade genética em caracteres adaptativos na cultura da aveia (Avena sativa L.). 260 $aDissertação (Mestrado em Fitotecnia - Plantas de Lavoura) - Universidade Federal do Rio Grande do Sul, Porto Alegre.$c1990 300 $a79 p. 650 $aBreeding 650 $aOats 650 $aAveia
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Embrapa Trigo (CNPT) |
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Registro Completo
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
10/03/2014 |
Data da última atualização: |
19/10/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
SCHWARTZ, G.; LOPES, J. C.; KANASHIRO, M.; MOHREN, G. M.; PEÑA-CLAROS, M. |
Afiliação: |
GUSTAVO SCHWARTZ, CPATU; JOSE DO CARMO ALVES LOPES, CPATU; MILTON KANASHIRO, CPATU; Godefridus M. Mohren, Forest Ecology and Forest Management Group, Wageningen University and Research Centre; Marielos Peña-Claros, Forest Ecology and Forest Management Group, Wageningen University and Research Centre. |
Título: |
Disturbance level determines the regeneration of commercial tree species in the Eastern Amazon. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
Biotropica, v. 46, n. 2, p. 148-156, Mar. 2014. |
Idioma: |
Inglês |
Conteúdo: |
The effects of reduced-impact logging (RIL) on the regeneration of commercial tree species were investigated, as long-term timber yields depend partly on the availability of seedlings in a managed forest. On four occasions during a 20-month period in the Tapaj os National Forest (Eastern Amazon, Brazil), seven commercial tree species were assessed as follows: the long-lived pioneers Bagassa guianensis and Jacaranda copaia; the partially shade-tolerant Hymenaea courbaril, Dipteryx odorata, and Carapa guianensis; and the totally shade-tolerant Symphonia globulifera and Manilkara huberi. In 2439 10 9 10 m plots, all individuals < 20 cm diameter at breast height (dbh) were assessed over three intervals, before, during, and after the forest being logged. Before logging, the density of seedlings and saplings of the seven species did not change. Logged trees were spatially aggregated, with 9.2 percent of the plots being heavily impacted by logging. After logging, the recruitment rate increased more than the mortality rate, so that post-harvesting densities of seedlings and saplings increased. The increase in density was concentrated in logged plots with more disturbances. It is concluded that post-harvesting heterogeneity of micro-environments created by RIL may be an important component to be taken into account for sustainable forest management and conservation of commercial species. |
Thesagro: |
Ecologia; Floresta. |
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
Marc: |
LEADER 01962naa a2200193 a 4500 001 1981993 005 2022-10-19 008 2014 bl uuuu u00u1 u #d 100 1 $aSCHWARTZ, G. 245 $aDisturbance level determines the regeneration of commercial tree species in the Eastern Amazon.$h[electronic resource] 260 $c2014 520 $aThe effects of reduced-impact logging (RIL) on the regeneration of commercial tree species were investigated, as long-term timber yields depend partly on the availability of seedlings in a managed forest. On four occasions during a 20-month period in the Tapaj os National Forest (Eastern Amazon, Brazil), seven commercial tree species were assessed as follows: the long-lived pioneers Bagassa guianensis and Jacaranda copaia; the partially shade-tolerant Hymenaea courbaril, Dipteryx odorata, and Carapa guianensis; and the totally shade-tolerant Symphonia globulifera and Manilkara huberi. In 2439 10 9 10 m plots, all individuals < 20 cm diameter at breast height (dbh) were assessed over three intervals, before, during, and after the forest being logged. Before logging, the density of seedlings and saplings of the seven species did not change. Logged trees were spatially aggregated, with 9.2 percent of the plots being heavily impacted by logging. After logging, the recruitment rate increased more than the mortality rate, so that post-harvesting densities of seedlings and saplings increased. The increase in density was concentrated in logged plots with more disturbances. It is concluded that post-harvesting heterogeneity of micro-environments created by RIL may be an important component to be taken into account for sustainable forest management and conservation of commercial species. 650 $aEcologia 650 $aFloresta 700 1 $aLOPES, J. C. 700 1 $aKANASHIRO, M. 700 1 $aMOHREN, G. M. 700 1 $aPEÑA-CLAROS, M. 773 $tBiotropica$gv. 46, n. 2, p. 148-156, Mar. 2014.
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