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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
21/03/1994 |
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Data da última atualização: |
21/03/1994 |
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Autoria: |
SILVA, R. G. da. |
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Título: |
Determinacao do valor genetico para selecao de reprodutores. |
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Ano de publicação: |
1986 |
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Fonte/Imprenta: |
In: PEIXOTO, A.M.; MOURA, J.C. de; FARIA, V.P. de. Melhoramento genetico de bovinos. Piracicaba: FEALQ, 1986. |
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Páginas: |
p.27-40. |
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Idioma: |
Português |
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Conteúdo: |
Determinacao do valor genetico para selecao de reprodutores. |
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Palavras-Chave: |
Genetico; Reprodutores; Valor. |
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Thesagro: |
Seleção. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00582naa a2200181 a 4500
001 1036646
005 1994-03-21
008 1986 bl uuuu u00u1 u #d
100 1 $aSILVA, R. G. da
245 $aDeterminacao do valor genetico para selecao de reprodutores.
260 $c1986
300 $ap.27-40.
520 $aDeterminacao do valor genetico para selecao de reprodutores.
650 $aSeleção
653 $aGenetico
653 $aReprodutores
653 $aValor
773 $tIn: PEIXOTO, A.M.; MOURA, J.C. de; FARIA, V.P. de. Melhoramento genetico de bovinos. Piracicaba: FEALQ, 1986.
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Embrapa Pecuária Sudeste (CPPSE) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
08/08/1997 |
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Data da última atualização: |
18/03/2014 |
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Autoria: |
SILVA, J. N. M.; CARVALHO, J. O. P. de; LOPES, J. do C. A.; ALMEIDA, B. F. de; COSTA, D. H. M.; OLIVEIRA, L. C. de; VANCLAY, J. K.; SKOVSGAARD, J. P. |
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Afiliação: |
JOSÉ NATALINO MACEDO SILVA, CPATU; JOÃO OLEGÁRIO PEREIRA DE CARVALHO, CPATU; JOSE DO CARMO ALVES LOPES, CPATU; CPATU; CPATU; FCAP; ROYAL VETERINARY AND AGRICULTURAL UNIVERSITY; DANISH FOREST AND LANDSCAPE RESEARCH INSTITUTE. |
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Título: |
Growth and yield of a tropical rain forest in the Brazilian Amazon 13 years after logging. |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
Forest Ecology and Management, v. 71, n. 3, p. 267-274, Feb. 1995. |
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DOI: |
http://dx.doi.org/10.1016/0378-1127(94)06106-S |
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Idioma: |
Inglês |
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Conteúdo: |
Successive inventories of a silvicultural experiment in terra firme rain forest within the Tapajós National Forest in the Brazilian Amazon are examined to provide guidelines for operational forest management on a sustainable basis. The experiment was logged in 1979 without additional silvicultural treatment, but included protection from further logging and encroachment ("log and leave"). Thirty-six permanent plots established in 1981 were remeasured in 1987 and 1992. Logging changed the canopy structure and altered the composition of the stand, reducing the number of shade tolerant species and stimulating light demanding species. There was a net increase in stem number and stand basal area during the 11 year observation period, and this trend also holds for most of the individual species. The stand basal area 13 years after logging was about 75% of that in a comparable unlogged forest. Logging stimulated growth, but this effect was short-lived, lasting only about 3 years, and current growth rates are similar to those in the unlogged forest. Between the first and second remeasures, average diameter increment decreased from 0.4 to 0.2 cm year;1, mortality remained relatively constant at 2.5% year;1, while recruitment (at 5 cm diameter at breast height) decreased from 5 to 2%. Total volume production declined from approximately 6 to 4 m3 ha;1 year;1, while commercial production remained about 0.8 m3 ha;1 year;1. New commercial species increased the commercial volume in 1992 from 18 to 54 m3 ha−1, and the increment to 1.8 m3 ha;1 year;1. Results from this experiment provide the first quantitative information for management planning in the Tapajós Forest, and may guide the choice of cutting cycle and annual allowable cut. Silvicultural treatment to stimulate growth rates in forest areas zoned for timber production should be considered as a viable management option. Extrapolations of these results to an anticipated 30?35 year cutting cycle must be interpreted with caution. Ongoing remeasurement and analysis of these and other plots over the next 30 years or more are necessary to provide a stronger basis for management inferences. MenosSuccessive inventories of a silvicultural experiment in terra firme rain forest within the Tapajós National Forest in the Brazilian Amazon are examined to provide guidelines for operational forest management on a sustainable basis. The experiment was logged in 1979 without additional silvicultural treatment, but included protection from further logging and encroachment ("log and leave"). Thirty-six permanent plots established in 1981 were remeasured in 1987 and 1992. Logging changed the canopy structure and altered the composition of the stand, reducing the number of shade tolerant species and stimulating light demanding species. There was a net increase in stem number and stand basal area during the 11 year observation period, and this trend also holds for most of the individual species. The stand basal area 13 years after logging was about 75% of that in a comparable unlogged forest. Logging stimulated growth, but this effect was short-lived, lasting only about 3 years, and current growth rates are similar to those in the unlogged forest. Between the first and second remeasures, average diameter increment decreased from 0.4 to 0.2 cm year;1, mortality remained relatively constant at 2.5% year;1, while recruitment (at 5 cm diameter at breast height) decreased from 5 to 2%. Total volume production declined from approximately 6 to 4 m3 ha;1 year;1, while commercial production remained about 0.8 m3 ha;1 year;1. New commercial species increased the commercial volume in 1992 fro... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Floresta chuvosa; Floresta de terra firme; Manejo florestal sustentável; Sustainability. |
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Thesagro: |
Extração da Madeira; Silvicultura. |
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Thesaurus NAL: |
Amazonia; logging; rain forests; silviculture. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03205naa a2200349 a 4500
001 1397269
005 2014-03-18
008 1995 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/0378-1127(94)06106-S$2DOI
100 1 $aSILVA, J. N. M.
245 $aGrowth and yield of a tropical rain forest in the Brazilian Amazon 13 years after logging.
260 $c1995
520 $aSuccessive inventories of a silvicultural experiment in terra firme rain forest within the Tapajós National Forest in the Brazilian Amazon are examined to provide guidelines for operational forest management on a sustainable basis. The experiment was logged in 1979 without additional silvicultural treatment, but included protection from further logging and encroachment ("log and leave"). Thirty-six permanent plots established in 1981 were remeasured in 1987 and 1992. Logging changed the canopy structure and altered the composition of the stand, reducing the number of shade tolerant species and stimulating light demanding species. There was a net increase in stem number and stand basal area during the 11 year observation period, and this trend also holds for most of the individual species. The stand basal area 13 years after logging was about 75% of that in a comparable unlogged forest. Logging stimulated growth, but this effect was short-lived, lasting only about 3 years, and current growth rates are similar to those in the unlogged forest. Between the first and second remeasures, average diameter increment decreased from 0.4 to 0.2 cm year;1, mortality remained relatively constant at 2.5% year;1, while recruitment (at 5 cm diameter at breast height) decreased from 5 to 2%. Total volume production declined from approximately 6 to 4 m3 ha;1 year;1, while commercial production remained about 0.8 m3 ha;1 year;1. New commercial species increased the commercial volume in 1992 from 18 to 54 m3 ha−1, and the increment to 1.8 m3 ha;1 year;1. Results from this experiment provide the first quantitative information for management planning in the Tapajós Forest, and may guide the choice of cutting cycle and annual allowable cut. Silvicultural treatment to stimulate growth rates in forest areas zoned for timber production should be considered as a viable management option. Extrapolations of these results to an anticipated 30?35 year cutting cycle must be interpreted with caution. Ongoing remeasurement and analysis of these and other plots over the next 30 years or more are necessary to provide a stronger basis for management inferences.
650 $aAmazonia
650 $alogging
650 $arain forests
650 $asilviculture
650 $aExtração da Madeira
650 $aSilvicultura
653 $aBrasil
653 $aFloresta chuvosa
653 $aFloresta de terra firme
653 $aManejo florestal sustentável
653 $aSustainability
700 1 $aCARVALHO, J. O. P. de
700 1 $aLOPES, J. do C. A.
700 1 $aALMEIDA, B. F. de
700 1 $aCOSTA, D. H. M.
700 1 $aOLIVEIRA, L. C. de
700 1 $aVANCLAY, J. K.
700 1 $aSKOVSGAARD, J. P.
773 $tForest Ecology and Management$gv. 71, n. 3, p. 267-274, Feb. 1995.
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