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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. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
26/11/2013 |
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Data da última atualização: |
18/02/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CARDOSO, D. J.; LACERDA, A. E. B. de; ROSOT, M. A. D.; GARRASTAZU, M. C.; LIMA, R. T. |
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Afiliação: |
DENISE JETON CARDOSO, CNPF; ANDRE EDUARDO BISCAIA DE LACERDA, CNPF; MARIA AUGUSTA DOETZER ROSOT, CNPF; MARILICE CORDEIRO GARRASTAZU, CNPF; RENATO TEIXEIRA LIMA, VALOR FLORESTAL. |
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Título: |
Influence of spacing regimes on the development of loblolly pine (Pinus taeda L.) in Southern Brazil. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Forest Ecology and Management, n. 310, p. 761-769, 2013. |
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Idioma: |
Inglês |
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Conteúdo: |
The economic potential of loblolly pine has long been recognized due to the ability to achieve growth levels in commercial plantations that far exceed their expected natural growth. Interest in this species is on the rise as the potential for increased production is becoming more feasible in Brazil and particularly in the US. As production increases and cultural treatments are adopted, understanding long-term outcomes based on similar practices are essential for managers. Long-term spacing studies using a variety of initial densities for different tree species show that initial density has little effect on total wood yield for cycles longer than 20 years. On the other hand, initial density has important implications when considering the intended product and its respective value as well as the overall costs of cultural treatments. This paper reports the 24-year growth of Pinus taeda – loblolly pine – in Southern Brazil in response to five cultural regimes. Five initial spacing regimes (2.5 1.2, 2.5 2.0, 2.5 2.8, 2.5 3.6 and 2.5 4.4 m) combined with cultural procedures generally used in commercial stands were studied. Dendrometric variables analyzed include diameter at breast height (dbh), average and dominant height, site index (SI), basal area, volume per tree and per hectare, and assortment volume; variables were tested using analysis of variance and Tukey test. The results indicate a final lower dbh average in denser spacing regimes but no significant difference in relation to volume per hectare and stand basal area at the end of the 24 year cycle. Our results demonstrate that it is possible to obtain the same volume per hectare, on average 385.7 m3 ha1, at the age of harvesting by combining different initial spacings with thinning intensities. The mean annual increment (MAI) was analyzed by reconstructing growth (volume) using the software Pisapro. The simulations showed that MAI has a positive correlation with initial spacing in which the densest spacing obtained a MAI approximately 45% higher than the widest treatment. The results provide managers with long-term data that can be used in forest management planning, e.g. by allowing companies to adjust their operations depending on the costs of planting, maintenance and other cultural treatments. The results also point out that depending on the aim of the production, initial spacing and thinning can be adjusted to meet target product specifications (e.g. larger dbh, lack of knots). MenosThe economic potential of loblolly pine has long been recognized due to the ability to achieve growth levels in commercial plantations that far exceed their expected natural growth. Interest in this species is on the rise as the potential for increased production is becoming more feasible in Brazil and particularly in the US. As production increases and cultural treatments are adopted, understanding long-term outcomes based on similar practices are essential for managers. Long-term spacing studies using a variety of initial densities for different tree species show that initial density has little effect on total wood yield for cycles longer than 20 years. On the other hand, initial density has important implications when considering the intended product and its respective value as well as the overall costs of cultural treatments. This paper reports the 24-year growth of Pinus taeda – loblolly pine – in Southern Brazil in response to five cultural regimes. Five initial spacing regimes (2.5 1.2, 2.5 2.0, 2.5 2.8, 2.5 3.6 and 2.5 4.4 m) combined with cultural procedures generally used in commercial stands were studied. Dendrometric variables analyzed include diameter at breast height (dbh), average and dominant height, site index (SI), basal area, volume per tree and per hectare, and assortment volume; variables were tested using analysis of variance and Tukey test. The results indicate a final lower dbh average in denser spacing regimes but no significant difference in relatio... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Espécie exótica; Espécie florestal. |
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Thesagro: |
Densidade de Plantio; Pinus Taeda. |
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Categoria do assunto: |
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Marc: |
LEADER 03175naa a2200229 a 4500
001 1972136
005 2015-02-18
008 2013 bl uuuu u00u1 u #d
100 1 $aCARDOSO, D. J.
245 $aInfluence of spacing regimes on the development of loblolly pine (Pinus taeda L.) in Southern Brazil.$h[electronic resource]
260 $c2013
520 $aThe economic potential of loblolly pine has long been recognized due to the ability to achieve growth levels in commercial plantations that far exceed their expected natural growth. Interest in this species is on the rise as the potential for increased production is becoming more feasible in Brazil and particularly in the US. As production increases and cultural treatments are adopted, understanding long-term outcomes based on similar practices are essential for managers. Long-term spacing studies using a variety of initial densities for different tree species show that initial density has little effect on total wood yield for cycles longer than 20 years. On the other hand, initial density has important implications when considering the intended product and its respective value as well as the overall costs of cultural treatments. This paper reports the 24-year growth of Pinus taeda – loblolly pine – in Southern Brazil in response to five cultural regimes. Five initial spacing regimes (2.5 1.2, 2.5 2.0, 2.5 2.8, 2.5 3.6 and 2.5 4.4 m) combined with cultural procedures generally used in commercial stands were studied. Dendrometric variables analyzed include diameter at breast height (dbh), average and dominant height, site index (SI), basal area, volume per tree and per hectare, and assortment volume; variables were tested using analysis of variance and Tukey test. The results indicate a final lower dbh average in denser spacing regimes but no significant difference in relation to volume per hectare and stand basal area at the end of the 24 year cycle. Our results demonstrate that it is possible to obtain the same volume per hectare, on average 385.7 m3 ha1, at the age of harvesting by combining different initial spacings with thinning intensities. The mean annual increment (MAI) was analyzed by reconstructing growth (volume) using the software Pisapro. The simulations showed that MAI has a positive correlation with initial spacing in which the densest spacing obtained a MAI approximately 45% higher than the widest treatment. The results provide managers with long-term data that can be used in forest management planning, e.g. by allowing companies to adjust their operations depending on the costs of planting, maintenance and other cultural treatments. The results also point out that depending on the aim of the production, initial spacing and thinning can be adjusted to meet target product specifications (e.g. larger dbh, lack of knots).
650 $aDensidade de Plantio
650 $aPinus Taeda
653 $aBrasil
653 $aEspécie exótica
653 $aEspécie florestal
700 1 $aLACERDA, A. E. B. de
700 1 $aROSOT, M. A. D.
700 1 $aGARRASTAZU, M. C.
700 1 $aLIMA, R. T.
773 $tForest Ecology and Management$gn. 310, p. 761-769, 2013.
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Registro original: |
Embrapa Florestas (CNPF) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
15/10/2004 |
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Data da última atualização: |
15/10/2004 |
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Autoria: |
DIAS, P. F.; SOUTO, S. M.; PEREIRA, B. M.; LIZIEIRE, R. S.; ZANINE, A. de M.; SCHIMIDT, L. T.; FRANCO, A. A. |
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Título: |
Sobrevivência de estacas de gliricidia (Gliricidia sepium) como moirão vivo. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Pasturas Tropicales, Cali, v. 26, n. 2, p. 55-62, 2004. |
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Idioma: |
Português |
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Notas: |
Stakes of Gliricidia sepium as supprt of fences. |
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Conteúdo: |
For 9 months, between 2001 and 2003, the use of stakes of Gliricidia sepium as supports of electric fences was evaluated in pastures of Cynodon nlemfuensis, grazed by 5-month-old calves, at the experimental field of Embrapa-Agrobiologia in Brazil. Stakes 1.5 and 2 m long were planted in the soil at a depth of 40 cm. The four treatments evaluated consisted of two plant heights and two types of electric fence insulators (commercial and polyurethane), with 14 replicates (monthly evaluation times). Stakes were placed at 10-m intervals, constituting the experimental units. Statistical analyses were performed using the SAEG v. 7.1 software, converting data corresponding to stake diameter and number of regrowths by arcsine. No differences were observed between treatments regarding number of regrowths/plant or plant diameter. Pastures were submitted to browsing and regrowth survival was above 78%.
Durante nove meses, entre 1991 e 1993, no campo experimental da EMBRAPA Agrobiologia, Brasil, foi avaliado o uso de estacas de Gliricídia sepium como suporte para cerca elétrica, em pastagens de cynodon nhemfuensis, utilizadas por bezerros, com cinco meses de idade. Foram plantadas estacas de 1,5 e 2 metros de comprimento, a uma profundidade de 40 cm. Os quatro tratamentos experimentais consistiram de 2 alturas de plantas e dois tipos de isoladores elétricos (comercial e poliuretano), com 14 repetições e avaliações mensais. As estacas foram plantadas a intervalos de 10 m e consistiram a unidade experimental. As análises estatísticas foram realizadas pelo SAEG v. 7.1, mediante a conversão, por arcoseno, dos dados referente ao diâmetro das estacas e número de rebrotas. Não foram observadas diferenças entre tratamentos para o n´mero de rebrotas/plantas e para o diâmetro das plantas. Os animais pastorearam as folhas e a sobrevivência dos brotos foi maior que 78%. MenosFor 9 months, between 2001 and 2003, the use of stakes of Gliricidia sepium as supports of electric fences was evaluated in pastures of Cynodon nlemfuensis, grazed by 5-month-old calves, at the experimental field of Embrapa-Agrobiologia in Brazil. Stakes 1.5 and 2 m long were planted in the soil at a depth of 40 cm. The four treatments evaluated consisted of two plant heights and two types of electric fence insulators (commercial and polyurethane), with 14 replicates (monthly evaluation times). Stakes were placed at 10-m intervals, constituting the experimental units. Statistical analyses were performed using the SAEG v. 7.1 software, converting data corresponding to stake diameter and number of regrowths by arcsine. No differences were observed between treatments regarding number of regrowths/plant or plant diameter. Pastures were submitted to browsing and regrowth survival was above 78%.
Durante nove meses, entre 1991 e 1993, no campo experimental da EMBRAPA Agrobiologia, Brasil, foi avaliado o uso de estacas de Gliricídia sepium como suporte para cerca elétrica, em pastagens de cynodon nhemfuensis, utilizadas por bezerros, com cinco meses de idade. Foram plantadas estacas de 1,5 e 2 metros de comprimento, a uma profundidade de 40 cm. Os quatro tratamentos experimentais consistiram de 2 alturas de plantas e dois tipos de isoladores elétricos (comercial e poliuretano), com 14 repetições e avaliações mensais. As estacas foram plantadas a intervalos de 10 m e consistiram a ... Mostrar Tudo |
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Palavras-Chave: |
Survival. |
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Thesagro: |
Adubo Verde; Estaca; Gliricidia; Sobrevivência. |
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Thesaurus NAL: |
Gliricidia sepium; green manures. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02700naa a2200289 a 4500
001 1626551
005 2004-10-15
008 2004 bl --- 0-- u #d
100 1 $aDIAS, P. F.
245 $aSobrevivência de estacas de gliricidia (Gliricidia sepium) como moirão vivo.
260 $c2004
500 $aStakes of Gliricidia sepium as supprt of fences.
520 $aFor 9 months, between 2001 and 2003, the use of stakes of Gliricidia sepium as supports of electric fences was evaluated in pastures of Cynodon nlemfuensis, grazed by 5-month-old calves, at the experimental field of Embrapa-Agrobiologia in Brazil. Stakes 1.5 and 2 m long were planted in the soil at a depth of 40 cm. The four treatments evaluated consisted of two plant heights and two types of electric fence insulators (commercial and polyurethane), with 14 replicates (monthly evaluation times). Stakes were placed at 10-m intervals, constituting the experimental units. Statistical analyses were performed using the SAEG v. 7.1 software, converting data corresponding to stake diameter and number of regrowths by arcsine. No differences were observed between treatments regarding number of regrowths/plant or plant diameter. Pastures were submitted to browsing and regrowth survival was above 78%. Durante nove meses, entre 1991 e 1993, no campo experimental da EMBRAPA Agrobiologia, Brasil, foi avaliado o uso de estacas de Gliricídia sepium como suporte para cerca elétrica, em pastagens de cynodon nhemfuensis, utilizadas por bezerros, com cinco meses de idade. Foram plantadas estacas de 1,5 e 2 metros de comprimento, a uma profundidade de 40 cm. Os quatro tratamentos experimentais consistiram de 2 alturas de plantas e dois tipos de isoladores elétricos (comercial e poliuretano), com 14 repetições e avaliações mensais. As estacas foram plantadas a intervalos de 10 m e consistiram a unidade experimental. As análises estatísticas foram realizadas pelo SAEG v. 7.1, mediante a conversão, por arcoseno, dos dados referente ao diâmetro das estacas e número de rebrotas. Não foram observadas diferenças entre tratamentos para o n´mero de rebrotas/plantas e para o diâmetro das plantas. Os animais pastorearam as folhas e a sobrevivência dos brotos foi maior que 78%.
650 $aGliricidia sepium
650 $agreen manures
650 $aAdubo Verde
650 $aEstaca
650 $aGliricidia
650 $aSobrevivência
653 $aSurvival
700 1 $aSOUTO, S. M.
700 1 $aPEREIRA, B. M.
700 1 $aLIZIEIRE, R. S.
700 1 $aZANINE, A. de M.
700 1 $aSCHIMIDT, L. T.
700 1 $aFRANCO, A. A.
773 $tPasturas Tropicales, Cali$gv. 26, n. 2, p. 55-62, 2004.
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Embrapa Agrobiologia (CNPAB) |
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