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Registro Completo |
Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Florestas; Embrapa Pantanal. |
Data corrente: |
22/05/2000 |
Data da última atualização: |
22/05/2000 |
Autoria: |
OLIVEIRA, M. V. N. d'. |
Título: |
Artificial regeneration in gaps and skidding trails after mechanised forest exploitation in Acre, Brazil. |
Ano de publicação: |
2000 |
Fonte/Imprenta: |
Forest Ecology and Management, Amsterdam, v. 127, p. 67-76, 2000. |
Idioma: |
Inglês |
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 |
Palavras-Chave: |
Acre; Brasil; Cedrella fissilis; Enrichment; Enrichment planting; Enriquecer; Enriquecimento; Exploitation; Management; Manejo florestal; Plantar; Plantio de enriquecimento; Torresia acreana. |
Thesagro: |
Bertholletia Excelsa; Ceiba Pentandra; Ecologia; Exploração Florestal; Floresta; Manejo; Regeneração Artificial; Silvicultura; Swietenia Macrophylla; Viveiro. |
Thesaurus Nal: |
artificial regeneration; ecology; forest management; forestry; seedlings; silviculture. |
Categoria do assunto: |
-- |
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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