|
Registro Completo |
|
Biblioteca(s): |
Embrapa Cerrados. |
|
Data corrente: |
27/03/1992 |
|
Data da última atualização: |
27/03/1992 |
|
Autoria: |
FURLEY, P. A.; RATTER, J. A. |
|
Título: |
Soil resources and plant communities of Central Brazilian cerrado and their development. |
|
Ano de publicação: |
1988 |
|
Fonte/Imprenta: |
Journal of Biogeography, v.15, p.97-108, 1988. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Cerrado is the natural vegetation of the poorer soil in central Braziland covers appromately 23% of the land area of the country. It has a marked seasonal climate and possesses a large characteristic flora of fire-resistant plants including about 800 species of trees and large shrubs. The soils are acidic with low CEC and high levels of Al saturation. They are well drained and the majority are Oxisols (ferrallitic soils). The vegetation ranges from treeless grasslands to closed xeromoprphic forests. Attempts have made to correlate increased density of the woody vegetation with grandients in soil nutrients but the relationship is complex. Two floristically different types cerradao (close savanna woodland) are associated with mesotrophic and dystrophic soils...respectively. Fire is also an important factor in influencing the density of woody vegetation. A distinct community of cerrado trees and shrubs occurs in areas where the water table is periodically high. Aluminium is an important factor in cerrado soils and frequently accurs at levels toxic to cultivated plants. On the pther hand, the native species are adapted to high Al levels and a nunber are Al accumulators. Much of cerrado area is now cultivated. The strategy has been to neutralize the effects of soil acidity and build up soil fertility, mainly by adding P and Ca. Extensive areas have also been turned over to cattle pasture and pine or eucalypt plantations. A plea is made for greater conservation of cerrado areas since, at present, only a small... MenosCerrado is the natural vegetation of the poorer soil in central Braziland covers appromately 23% of the land area of the country. It has a marked seasonal climate and possesses a large characteristic flora of fire-resistant plants including about 800 species of trees and large shrubs. The soils are acidic with low CEC and high levels of Al saturation. They are well drained and the majority are Oxisols (ferrallitic soils). The vegetation ranges from treeless grasslands to closed xeromoprphic forests. Attempts have made to correlate increased density of the woody vegetation with grandients in soil nutrients but the relationship is complex. Two floristically different types cerradao (close savanna woodland) are associated with mesotrophic and dystrophic soils...respectively. Fire is also an important factor in influencing the density of woody vegetation. A distinct community of cerrado trees and shrubs occurs in areas where the water table is periodically high. Aluminium is an important factor in cerrado soils and frequently accurs at levels toxic to cultivated plants. On the pther hand, the native species are adapted to high Al levels and a nunber are Al accumulators. Much of cerrado area is now cultivated. The strategy has been to neutralize the effects of soil acidity and build up soil fertility, mainly by adding P and Ca. Extensive areas have also been turned over to cattle pasture and pine or eucalypt plantations. A plea is made for greater conservation of cerrado areas s... Mostrar Tudo |
|
Palavras-Chave: |
Brasil; Comunidade vegetal. |
|
Thesagro: |
Cerrado; Recurso do Solo. |
|
Thesaurus Nal: |
Brazil; plant communities; soil resources. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02122naa a2200217 a 4500
001 1546975
005 1992-03-27
008 1988 bl --- 0-- u #d
100 1 $aFURLEY, P. A.
245 $aSoil resources and plant communities of Central Brazilian cerrado and their development.
260 $c1988
520 $aCerrado is the natural vegetation of the poorer soil in central Braziland covers appromately 23% of the land area of the country. It has a marked seasonal climate and possesses a large characteristic flora of fire-resistant plants including about 800 species of trees and large shrubs. The soils are acidic with low CEC and high levels of Al saturation. They are well drained and the majority are Oxisols (ferrallitic soils). The vegetation ranges from treeless grasslands to closed xeromoprphic forests. Attempts have made to correlate increased density of the woody vegetation with grandients in soil nutrients but the relationship is complex. Two floristically different types cerradao (close savanna woodland) are associated with mesotrophic and dystrophic soils...respectively. Fire is also an important factor in influencing the density of woody vegetation. A distinct community of cerrado trees and shrubs occurs in areas where the water table is periodically high. Aluminium is an important factor in cerrado soils and frequently accurs at levels toxic to cultivated plants. On the pther hand, the native species are adapted to high Al levels and a nunber are Al accumulators. Much of cerrado area is now cultivated. The strategy has been to neutralize the effects of soil acidity and build up soil fertility, mainly by adding P and Ca. Extensive areas have also been turned over to cattle pasture and pine or eucalypt plantations. A plea is made for greater conservation of cerrado areas since, at present, only a small...
650 $aBrazil
650 $aplant communities
650 $asoil resources
650 $aCerrado
650 $aRecurso do Solo
653 $aBrasil
653 $aComunidade vegetal
700 1 $aRATTER, J. A.
773 $tJournal of Biogeography$gv.15, p.97-108, 1988.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Cerrados (CPAC) |
|
