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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Florestas; Embrapa Pantanal. |
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Data corrente: |
22/05/2000 |
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Data da última atualização: |
22/05/2000 |
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Autoria: |
OLIVEIRA, M. V. N. d'. |
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Título: |
Artificial regeneration in gaps and skidding trails after mechanised forest exploitation in Acre, Brazil. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Forest Ecology and Management, Amsterdam, v. 127, p. 67-76, 2000. |
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Idioma: |
Inglês |
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Conteúdo: |
The natural regeneration of some desirable species under exploitation pressure in Amazon is often very poor or non-existent. The traditional techniques of enrichment planting have presented low performance of the planted seedlings and high costs for its implementation. This study analyzes the first 5 years of growth and survival of five tropical tree species (Bertholletia excelsa, Ceiba pentandra, Torresia acreana, Swietenia macrophylla and Cedrela fissilis) planted in skidding trails and exploitation gaps. The basic planting technique consisted in using the cleared areas after forest harvesting for the establishment of seedlings of species ecologically adapted to the gap environment. The study was carried out in the EMBRAPA-CPAF-ACRE (Agroforestry Research Centre of Acre) in Acre State in West Amazon. The diameter increment varied from 0.30 cm year-1 for Bertholletia to 0.52 cm year-1 for Swietenia and Torresia. After 5 yeras the height growth was similar for all species around 3.0 m. In the first year Bertholletia presented a high mortality, around 80%, caused by severe predation by rodents. Ceiba also presented a high mortality after the second year of planting probably due the canopy closure. The best survival percentage was presented by Torresia, over 90%. The Meliaceae (Swietenia and Cedrela) species had a similar survival, around 70 to 75%. The Hypsipyla grandella attack was more severe in Cedrela than in Swietenia, but in both cases (9.37 and 31% after 7 and 5 years respectively for Swietenia and Cedrela) was still low when compared with other enrichment planting. MenosThe natural regeneration of some desirable species under exploitation pressure in Amazon is often very poor or non-existent. The traditional techniques of enrichment planting have presented low performance of the planted seedlings and high costs for its implementation. This study analyzes the first 5 years of growth and survival of five tropical tree species (Bertholletia excelsa, Ceiba pentandra, Torresia acreana, Swietenia macrophylla and Cedrela fissilis) planted in skidding trails and exploitation gaps. The basic planting technique consisted in using the cleared areas after forest harvesting for the establishment of seedlings of species ecologically adapted to the gap environment. The study was carried out in the EMBRAPA-CPAF-ACRE (Agroforestry Research Centre of Acre) in Acre State in West Amazon. The diameter increment varied from 0.30 cm year-1 for Bertholletia to 0.52 cm year-1 for Swietenia and Torresia. After 5 yeras the height growth was similar for all species around 3.0 m. In the first year Bertholletia presented a high mortality, around 80%, caused by severe predation by rodents. Ceiba also presented a high mortality after the second year of planting probably due the canopy closure. The best survival percentage was presented by Torresia, over 90%. The Meliaceae (Swietenia and Cedrela) species had a similar survival, around 70 to 75%. The Hypsipyla grandella attack was more severe in Cedrela than in Swietenia, but in both cases (9.37 and 31% after 7 and 5 years... Mostrar Tudo |
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Palavras-Chave: |
Acre; Brasil; Cedrella fissilis; Enrichment; Enrichment planting; Enriquecer; Enriquecimento; Exploitation; Management; Manejo florestal; Plantar; Plantio de enriquecimento; Torresia acreana. |
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Thesagro: |
Bertholletia Excelsa; Ceiba Pentandra; Ecologia; Exploração Florestal; Floresta; Manejo; Regeneração Artificial; Silvicultura; Swietenia Macrophylla; Viveiro. |
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Thesaurus Nal: |
artificial regeneration; ecology; forest management; forestry; seedlings; silviculture. |
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Categoria do assunto: |
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Marc: |
LEADER 02880naa a2200469 a 4500
001 1303900
005 2000-05-22
008 2000 bl --- 0-- u #d
100 1 $aOLIVEIRA, M. V. N. d'.
245 $aArtificial regeneration in gaps and skidding trails after mechanised forest exploitation in Acre, Brazil.
260 $c2000
520 $aThe natural regeneration of some desirable species under exploitation pressure in Amazon is often very poor or non-existent. The traditional techniques of enrichment planting have presented low performance of the planted seedlings and high costs for its implementation. This study analyzes the first 5 years of growth and survival of five tropical tree species (Bertholletia excelsa, Ceiba pentandra, Torresia acreana, Swietenia macrophylla and Cedrela fissilis) planted in skidding trails and exploitation gaps. The basic planting technique consisted in using the cleared areas after forest harvesting for the establishment of seedlings of species ecologically adapted to the gap environment. The study was carried out in the EMBRAPA-CPAF-ACRE (Agroforestry Research Centre of Acre) in Acre State in West Amazon. The diameter increment varied from 0.30 cm year-1 for Bertholletia to 0.52 cm year-1 for Swietenia and Torresia. After 5 yeras the height growth was similar for all species around 3.0 m. In the first year Bertholletia presented a high mortality, around 80%, caused by severe predation by rodents. Ceiba also presented a high mortality after the second year of planting probably due the canopy closure. The best survival percentage was presented by Torresia, over 90%. The Meliaceae (Swietenia and Cedrela) species had a similar survival, around 70 to 75%. The Hypsipyla grandella attack was more severe in Cedrela than in Swietenia, but in both cases (9.37 and 31% after 7 and 5 years respectively for Swietenia and Cedrela) was still low when compared with other enrichment planting.
650 $aartificial regeneration
650 $aecology
650 $aforest management
650 $aforestry
650 $aseedlings
650 $asilviculture
650 $aBertholletia Excelsa
650 $aCeiba Pentandra
650 $aEcologia
650 $aExploração Florestal
650 $aFloresta
650 $aManejo
650 $aRegeneração Artificial
650 $aSilvicultura
650 $aSwietenia Macrophylla
650 $aViveiro
653 $aAcre
653 $aBrasil
653 $aCedrella fissilis
653 $aEnrichment
653 $aEnrichment planting
653 $aEnriquecer
653 $aEnriquecimento
653 $aExploitation
653 $aManagement
653 $aManejo florestal
653 $aPlantar
653 $aPlantio de enriquecimento
653 $aTorresia acreana
773 $tForest Ecology and Management, Amsterdam$gv. 127, p. 67-76, 2000.
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Embrapa Florestas (CNPF) |
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