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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
05/05/1999 |
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Data da última atualização: |
05/05/1999 |
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Autoria: |
LEITE, G. G.; GOMES, A. C.; T. NETO, R.; B. NETO, C. R. |
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Título: |
Expansao e senescencia de folhas de gramineas nativas dos Cerrados submetidas a queima. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Pasturas Tropicales, Cali, v.20, n.3, p.16-21, 1998. |
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Idioma: |
Português |
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Conteúdo: |
A study was carried out at the Agua Limpa Experimental Farm, located in the savannas of Brazil's Federal District, to study the effects of annual and biannual burning on different characteristics of the native grass species Echynolaena inflexa (Poiret) Chase, Trachypogon filifolius (Hach) Hitchc., Schyzachyrium tenerum Nees, and Axonopus barbigerus (Kunth) Hitchc. Characteristics studied were the dynamics of green tissue, expansion and senescence of lamina leaves. The study area included a Petric Plintsoil, a yellow-red Latosol, and a dark yellow-red Latosol. For each soil type, five plants that did not show signs of senescence were randomly selected for each species. Measurements of leaf extension and proportion of green and dead leafs were made at 4-week intervals. Regression and multivariate analyses were used to compare the proportion of live and dead tissue among the different species and soil types. The results show that leaf blade elongation of species increased during the wet summer months and decreased during the dry winter ones. This sequence followed the precipitation curve, regardless of soil type or frequency of burning. Leaf blade senescence increased with decreasing precipitation and temperature. The quantity of green tissue followed the precipitation curve for the region. Axonopus barbigerus and T.filifolius presented greater leaf elongation and lower leaf senescence in all soil types. Echynolaena inflexa and S. tenerum presented lower leaf blade elongation and senescence, regardless of soil type frequency of burning, suggesting that management strategies should be used to preserve or increase these two grass species in native pastures in the savanna region. MenosA study was carried out at the Agua Limpa Experimental Farm, located in the savannas of Brazil's Federal District, to study the effects of annual and biannual burning on different characteristics of the native grass species Echynolaena inflexa (Poiret) Chase, Trachypogon filifolius (Hach) Hitchc., Schyzachyrium tenerum Nees, and Axonopus barbigerus (Kunth) Hitchc. Characteristics studied were the dynamics of green tissue, expansion and senescence of lamina leaves. The study area included a Petric Plintsoil, a yellow-red Latosol, and a dark yellow-red Latosol. For each soil type, five plants that did not show signs of senescence were randomly selected for each species. Measurements of leaf extension and proportion of green and dead leafs were made at 4-week intervals. Regression and multivariate analyses were used to compare the proportion of live and dead tissue among the different species and soil types. The results show that leaf blade elongation of species increased during the wet summer months and decreased during the dry winter ones. This sequence followed the precipitation curve, regardless of soil type or frequency of burning. Leaf blade senescence increased with decreasing precipitation and temperature. The quantity of green tissue followed the precipitation curve for the region. Axonopus barbigerus and T.filifolius presented greater leaf elongation and lower leaf senescence in all soil types. Echynolaena inflexa and S. tenerum presented lower leaf blade elongation a... Mostrar Tudo |
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Palavras-Chave: |
Senescence. |
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Thesagro: |
Cerrado; Gramínea; Queimada; Senescência. |
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Thesaurus Nal: |
burning; grasses. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02331naa a2200241 a 4500
001 1545315
005 1999-05-05
008 1998 bl --- 0-- u #d
100 1 $aLEITE, G. G.
245 $aExpansao e senescencia de folhas de gramineas nativas dos Cerrados submetidas a queima.
260 $c1998
520 $aA study was carried out at the Agua Limpa Experimental Farm, located in the savannas of Brazil's Federal District, to study the effects of annual and biannual burning on different characteristics of the native grass species Echynolaena inflexa (Poiret) Chase, Trachypogon filifolius (Hach) Hitchc., Schyzachyrium tenerum Nees, and Axonopus barbigerus (Kunth) Hitchc. Characteristics studied were the dynamics of green tissue, expansion and senescence of lamina leaves. The study area included a Petric Plintsoil, a yellow-red Latosol, and a dark yellow-red Latosol. For each soil type, five plants that did not show signs of senescence were randomly selected for each species. Measurements of leaf extension and proportion of green and dead leafs were made at 4-week intervals. Regression and multivariate analyses were used to compare the proportion of live and dead tissue among the different species and soil types. The results show that leaf blade elongation of species increased during the wet summer months and decreased during the dry winter ones. This sequence followed the precipitation curve, regardless of soil type or frequency of burning. Leaf blade senescence increased with decreasing precipitation and temperature. The quantity of green tissue followed the precipitation curve for the region. Axonopus barbigerus and T.filifolius presented greater leaf elongation and lower leaf senescence in all soil types. Echynolaena inflexa and S. tenerum presented lower leaf blade elongation and senescence, regardless of soil type frequency of burning, suggesting that management strategies should be used to preserve or increase these two grass species in native pastures in the savanna region.
650 $aburning
650 $agrasses
650 $aCerrado
650 $aGramínea
650 $aQueimada
650 $aSenescência
653 $aSenescence
700 1 $aGOMES, A. C.
700 1 $aT. NETO, R.
700 1 $aB. NETO, C. R.
773 $tPasturas Tropicales, Cali$gv.20, n.3, p.16-21, 1998.
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Registro original: |
Embrapa Cerrados (CPAC) |
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| Registros recuperados : 431 | |
| 62. |  | GOMES, A. C. M. M.; CARNEIRO, R. M. D. G.; CAPDEVILLE, G.; MATTOS, J. C. Caracterização histológica da resistência de Pfaffia glomerata a Meloidogyne incognita. Nematologia Brasileira, Brasília, v. 30, n. 1, p. 120, 2006. In: CONGRESSO BRASILEIRO DE NEMATOLOGIA, 26., 2006, Campos dos Goytacazes.| Tipo: Resumo em Anais de Congresso | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 63. | | GOMES, A. C. M. M.; CARNEIRO, R. M. D. G.; CAPDEVILLE, G.; MATTOS, J. K. A. Caracterização histológica da resistência de Pfaffia glomerata a Meloidogyne incognita. In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 11., 2006, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2006. p. 47.| Tipo: Resumo em Anais de Congresso | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 69. | | KARIA, C. T.; ANDRADE, R. P. de; CHARCHAR, M. J. D'A.; GOMES, A. C. Caracterizacao de acessos de Stylosanthes guianensis (Aubl.) Sw., atraves da analise multivariada. In: REUNIAO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 34., 1997, Juiz de Fora, MG. Anais... Juiz de Fora: SBZ, 1997. v.2. p.45-47.| Biblioteca(s): Embrapa Cerrados. |
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| 80. | | VASCONCELOS, C. M.; AMABILE, R. F.; FERNANDES, F. D.; GOMES, A. C. Estudo de epocas de semeadura e densidades populacionais de cultivares de girassol (Helianthus annuus L.) no cerrado do Distrito Federal. In: ENCONTRO DE JOVENS TALENTOS DA EMBRAPA CERRADOS: CONSTRUINDO O CONHECIMENTO DO FUTURO, 1., 2000, Planaltina, DF. Resumos. Planaltina: Embrapa Cerrados, 2000. p.18. (Embrapa Cerrados. Documentos, 14).| Biblioteca(s): Embrapa Cerrados. |
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| Registros recuperados : 431 | |
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