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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
22/05/2002 |
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Data da última atualização: |
10/02/2015 |
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Autoria: |
HIGA, A. R.; HIGA, R. C. V.; KODAMA, A. S. |
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Afiliação: |
Higa, professor da UFPR; Higa, R. C. V. e Kodama, pesquisadores da Embrapa. |
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Título: |
Efeito da poda de copa na produção de sementes de Eucalyptus dunnii. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Boletim de Pesquisa Florestal, Colombo, n. 43, p. 99-105, jul./dez. 2001. |
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Idioma: |
Português |
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Conteúdo: |
Esse trabalho teve como objetivo avaliar os efeitos da poda da copa no florescimento e produção de sementes de uma APS de Eucalyptus dunnii Maiden localizada no município de Colombo, PR, latitude de 25°20' S, longitude 49°14' W e 920 m de altitude. A APS foi originada de um teste de procedência plantado em 1979. Dois anos após o último desbaste, quando as árvores estavam com 13 anos de idade, foi realizada uma coleta de sementes, através da poda de 50% da copa das árvores. O monitoramento do florescimento e a coleta de sementes foram realizadas aos dois, cinco e sete anos após a poda, quando as árvores estavam com 15, 17 e 19 anos de idade, respectivamente. O florescimento e a produção de sementes tenderam a aumentar com a idade, no período entre onze e vinte anos. Foram coletadas, em média, 625 g de sementes por árvore, aos 20 anos de idade, através da poda de até 50% da copa. Árvores da bordadura floresceram em maior proporção e produziram mais sementes que as localizadas internamente no talhão. No geral, a poda não afetou o florescimento aos cinco anos após essa operação. 33% das árvores internas do talhão e 10% das de bordadura, que foram podadas, não apresentaram florescimento até sete anos após a poda. Recomenda-se dividir a área da APS em quatro e coletar as sementes de uma sub área por ano e, também, testar tratamentos que possam aumentar a intensidade de florescimento e produção de sementes. |
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Palavras-Chave: |
Florescimento. |
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Thesaurus Nal: |
flowering. |
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Categoria do assunto: |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CNPF-2009-09/30237/1/higa.pdf
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Marc: |
LEADER 01943naa a2200169 a 4500
001 1280754
005 2015-02-10
008 2001 bl uuuu u00u1 u #d
100 1 $aHIGA, A. R.
245 $aEfeito da poda de copa na produção de sementes de Eucalyptus dunnii.
260 $c2001
520 $aEsse trabalho teve como objetivo avaliar os efeitos da poda da copa no florescimento e produção de sementes de uma APS de Eucalyptus dunnii Maiden localizada no município de Colombo, PR, latitude de 25°20' S, longitude 49°14' W e 920 m de altitude. A APS foi originada de um teste de procedência plantado em 1979. Dois anos após o último desbaste, quando as árvores estavam com 13 anos de idade, foi realizada uma coleta de sementes, através da poda de 50% da copa das árvores. O monitoramento do florescimento e a coleta de sementes foram realizadas aos dois, cinco e sete anos após a poda, quando as árvores estavam com 15, 17 e 19 anos de idade, respectivamente. O florescimento e a produção de sementes tenderam a aumentar com a idade, no período entre onze e vinte anos. Foram coletadas, em média, 625 g de sementes por árvore, aos 20 anos de idade, através da poda de até 50% da copa. Árvores da bordadura floresceram em maior proporção e produziram mais sementes que as localizadas internamente no talhão. No geral, a poda não afetou o florescimento aos cinco anos após essa operação. 33% das árvores internas do talhão e 10% das de bordadura, que foram podadas, não apresentaram florescimento até sete anos após a poda. Recomenda-se dividir a área da APS em quatro e coletar as sementes de uma sub área por ano e, também, testar tratamentos que possam aumentar a intensidade de florescimento e produção de sementes.
650 $aflowering
653 $aFlorescimento
700 1 $aHIGA, R. C. V.
700 1 $aKODAMA, A. S.
773 $tBoletim de Pesquisa Florestal, Colombo$gn. 43, p. 99-105, jul./dez. 2001.
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Registro original: |
Embrapa Florestas (CNPF) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
05/09/2008 |
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Data da última atualização: |
05/09/2008 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
BARTZ, M. L. C.; PASINI, A.; BROWN, G. G. |
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Afiliação: |
Marie Luise Carolina Bartz, UEL; Amarildo Pasini, UEL; George G. Brown, Embrapa Florestas. |
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Título: |
Earthworms in agroecosystems of Northern Paraná, Brazil. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM. |
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Idioma: |
Inglês |
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Conteúdo: |
Soil alterations, such as oscillations in temperature, moisture, and organic matter contents,
mainly resulting from agricultural activity, have an impact on both the number and species of earthworms in the soil. The objective of this paper was to identify earthworm species in
agroecosystems. The study was conducted in the cities of Rolândia and Arapongas - PR, Brazil, in five areas: 1) no-till (35 years); 2) subsoiled no-till; 3) pasture; 4) coffee plantation; and 5) native forest. In all areas the soil was classified as Typic Acrudox (Dystroferric Red Latosoil). Nine samplings were performed in each area during the dry period (winter), using the TSBF (Tropical Soil Biology and Fertility) methodology, which consists in removing 25 × 25 cm monoliths from the 0-30 cm layer. The earthworms were screened manually and preserved in 4% formaldehyde, and were then counted and separated into cocoons, juveniles, and adults and identified at the family, genus and specie levels. In order to calculate earthworm population densities, the following stages were considered: cocoons, juvenile, and adult individuals, while enchytraeids were disregarded (a separate calculation was made for this group). The population densities found in the various areas were very low: 0,014, 0,021, 0,083 and 0,090 individuals per m2, respectively, in the forest, no-till and coffee plantation, subsoiled no-till and pasture areas. Cocoons and one individual from the specie Pontoscolex corethrurus were found in the forest. All individuals were juveniles in the no-till and coffee plantation areas. However, population densities of 0,021 and 0,201 enchytraeid individuals of the genus Fridericia per m2 were found in these areas. Only a specie from de family Ocnerodrilidae was found in the subsoiled no-till
area and enchytraeids with population density of 0,076 per m2. Of the earthworm total found in the pasture, 45% were cocoons; of the remaining 55%, 25% were juvenile individuals of family Glossoscolecidae, 25% were individuals of the genus Fimoscolex, and 50% were of the specie Glossoscolex colonorum. It is worth to point out that all adult and juvenile individuals found were in aestivation. This fact, as well as their low population densities can be explained by the prolonged drought period that occurred in the region (3 months). Evaluations during the rainy period are required to better understand the results obtained. MenosSoil alterations, such as oscillations in temperature, moisture, and organic matter contents,
mainly resulting from agricultural activity, have an impact on both the number and species of earthworms in the soil. The objective of this paper was to identify earthworm species in
agroecosystems. The study was conducted in the cities of Rolândia and Arapongas - PR, Brazil, in five areas: 1) no-till (35 years); 2) subsoiled no-till; 3) pasture; 4) coffee plantation; and 5) native forest. In all areas the soil was classified as Typic Acrudox (Dystroferric Red Latosoil). Nine samplings were performed in each area during the dry period (winter), using the TSBF (Tropical Soil Biology and Fertility) methodology, which consists in removing 25 × 25 cm monoliths from the 0-30 cm layer. The earthworms were screened manually and preserved in 4% formaldehyde, and were then counted and separated into cocoons, juveniles, and adults and identified at the family, genus and specie levels. In order to calculate earthworm population densities, the following stages were considered: cocoons, juvenile, and adult individuals, while enchytraeids were disregarded (a separate calculation was made for this group). The population densities found in the various areas were very low: 0,014, 0,021, 0,083 and 0,090 individuals per m2, respectively, in the forest, no-till and coffee plantation, subsoiled no-till and pasture areas. Cocoons and one individual from the specie Pontoscolex corethrurus were found in th... Mostrar Tudo |
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Categoria do assunto: |
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Marc: |
LEADER 03079naa a2200145 a 4500
001 1314765
005 2008-09-05
008 2008 bl --- 0-- u #d
100 1 $aBARTZ, M. L. C.
245 $aEarthworms in agroecosystems of Northern Paraná, Brazil.
260 $c2008
520 $aSoil alterations, such as oscillations in temperature, moisture, and organic matter contents, mainly resulting from agricultural activity, have an impact on both the number and species of earthworms in the soil. The objective of this paper was to identify earthworm species in agroecosystems. The study was conducted in the cities of Rolândia and Arapongas - PR, Brazil, in five areas: 1) no-till (35 years); 2) subsoiled no-till; 3) pasture; 4) coffee plantation; and 5) native forest. In all areas the soil was classified as Typic Acrudox (Dystroferric Red Latosoil). Nine samplings were performed in each area during the dry period (winter), using the TSBF (Tropical Soil Biology and Fertility) methodology, which consists in removing 25 × 25 cm monoliths from the 0-30 cm layer. The earthworms were screened manually and preserved in 4% formaldehyde, and were then counted and separated into cocoons, juveniles, and adults and identified at the family, genus and specie levels. In order to calculate earthworm population densities, the following stages were considered: cocoons, juvenile, and adult individuals, while enchytraeids were disregarded (a separate calculation was made for this group). The population densities found in the various areas were very low: 0,014, 0,021, 0,083 and 0,090 individuals per m2, respectively, in the forest, no-till and coffee plantation, subsoiled no-till and pasture areas. Cocoons and one individual from the specie Pontoscolex corethrurus were found in the forest. All individuals were juveniles in the no-till and coffee plantation areas. However, population densities of 0,021 and 0,201 enchytraeid individuals of the genus Fridericia per m2 were found in these areas. Only a specie from de family Ocnerodrilidae was found in the subsoiled no-till area and enchytraeids with population density of 0,076 per m2. Of the earthworm total found in the pasture, 45% were cocoons; of the remaining 55%, 25% were juvenile individuals of family Glossoscolecidae, 25% were individuals of the genus Fimoscolex, and 50% were of the specie Glossoscolex colonorum. It is worth to point out that all adult and juvenile individuals found were in aestivation. This fact, as well as their low population densities can be explained by the prolonged drought period that occurred in the region (3 months). Evaluations during the rainy period are required to better understand the results obtained.
700 1 $aPASINI, A.
700 1 $aBROWN, G. G.
773 $tIn: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.
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