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Registro Completo |
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Biblioteca(s): |
Embrapa Acre; Embrapa Amapá. |
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Data corrente: |
08/05/2000 |
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Data da última atualização: |
03/07/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
OLIVEIRA, M. V. N. d'. |
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Afiliação: |
Embrapa Acre, Rio Branco, AC. |
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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, New York, 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 years 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 plantings. 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 years 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: |
Amazônia Ocidental; Castanha do brasil; Cerejeira; Ciencias forestales; Desempeño del crecimiento; Embrapa Acre; Exploração florestal mecanizada; Manejo florestal; Mecanización; Producción de madera; Regeneración artificial; Rio Branco (AC); Sobrevivência de espécies; Torresia acreana. |
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Thesagro: |
Bertholletia excelsa; Castanha do pará; Cedrela fissilis; Cedro; Ceiba pentandra; Essência florestal; Exploração florestal; Fator de crescimento; Floresta; Mogno; Paineira; Regeneração artificial; Silvicultura; Swietenia macrophylla. |
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Thesaurus Nal: |
Artificial regeneration; forest management; Forestry; forests; Growth performance; Mechanization; silviculture; Timber production. |
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Categoria do assunto: |
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K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 03242naa a2200553 a 4500
001 1344665
005 2024-07-03
008 2000 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, M. V. N. d'.
245 $aArtificial regeneration in gaps and skidding trails after mechanised forest exploitation in Acre, Brazil.$h[electronic resource]
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 years 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 plantings.
650 $aArtificial regeneration
650 $aforest management
650 $aForestry
650 $aforests
650 $aGrowth performance
650 $aMechanization
650 $asilviculture
650 $aTimber production
650 $aBertholletia excelsa
650 $aCastanha do pará
650 $aCedrela fissilis
650 $aCedro
650 $aCeiba pentandra
650 $aEssência florestal
650 $aExploração florestal
650 $aFator de crescimento
650 $aFloresta
650 $aMogno
650 $aPaineira
650 $aRegeneração artificial
650 $aSilvicultura
650 $aSwietenia macrophylla
653 $aAmazônia Ocidental
653 $aCastanha do brasil
653 $aCerejeira
653 $aCiencias forestales
653 $aDesempeño del crecimiento
653 $aEmbrapa Acre
653 $aExploração florestal mecanizada
653 $aManejo florestal
653 $aMecanización
653 $aProducción de madera
653 $aRegeneración artificial
653 $aRio Branco (AC)
653 $aSobrevivência de espécies
653 $aTorresia acreana
773 $tForest Ecology and Management, Amsterdam, New York$gv. 127, p. 67-76, 2000.
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Registro original: |
Embrapa Amapá (CPAF-AP) |
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