Data/hora: 04/06/2024 02:29:15

Biblioteca(s): | Embrapa Cerrados; Embrapa Pantanal.
Data corrente: | 13/06/1995
Data da última atualização: | 18/04/1996
Autoria: | EITEN, G.
Título: | The cerrado vegetation of Brazil.
Ano de publicação: | 1972
Fonte/Imprenta: | Botanical Review, v.38, n.2, p.201-341, Apr.- June 1972.
Idioma: | Inglês
Conteúdo: | The cerrado is a semideciduous xeromorphic vegetation dominant in central Brazil, occupying about 20% of the whole country or 40% of the non-Amazonian part. It forms a floristic with a rather distinct flora on the species level although much less distinct on the genus level. It has a unique apperance. Its taller woody plants are characterized by thick bark, leaning and twisted trunkas, twised jagged boughs, thick twigs, open crowns, large hard or soft-hairy simple leaves or large palmate or pinnate compound leaves. It occurs in every possible structure from closed forest-like forms,. through arboreal woodlands, tree and scrub woodlands, closed or open scrubs, dense to very open tree and scrub savannas or scrub savannas, to pure grassslands. In different parts of the cerrado region different ones of these structures are the prevalent native forms, but annual burnings and cutting-over have lowred and/or opened the woody layer of much of the taller denser cerrados. The ground layer is seasonal, predominantly grassy, with some xerophtic sedge species and many herbs, and a variavle density of low shrubs, semishrubs, and a few herbaceous to woody or subwoody ground and climbing thin-stemmed vines. Both woody and herbaceous species have a high degree of leaf xeromorphism, and the forbs, low shrubs and semishrubs generally have xylopodia. The cerrado occurs within an intermediate rainfal region, and only its southern edge may occasionally experience frosts. To the west and southeast, where rainfal is higher and the dry period less strong, the cerrado gives way to continuous mesophytic forest provinces, respectively, the Amazon forest and the Atlantic coastal forest. To the northeast and southwest, where the rainfall is lower and the dry season stringer, the cerrado gives way, respectively to caatinga and to the Chaco vegetation. Within its own climatic region, the cerrado is adapted to poor, well-drained, senile soils with low nutrient-ion content and high available aluminium saturation (latosols). These soils cover the major proportion of the area. Richer upland soils from more basic rocks in this climatic region occupy only a relatively small area and are covered by mesophytic forest. Where cerrado covers the upland, gallery forests follow the streams. Up to now the cerrado region has been sparsely inhabited and used almost only for extensive cattle raising. It is now beginning to be cultivated (with the addition of limestone and mineral fertilizers) in the more populated southern portion where there is no more uncleared forest land available. The cerrado is a climax vegetation dependent upon the correct range of climate, topographic position and soil. Its secondary and regressive stages due to human disturbance are also part of the same vegetation type, and most of the species of the secondary stages are the same as those of the climax stage.
Palavras-Chave: | Brasil; Central Brazil; Management; Pasture; Xeromorphic vegetation.
Thesagro: | Cerrado; Manejo; Pastagem; Vegetação.
Thesaurus Nal: | Brazil; vegetation.
Categoria do assunto: | --
Registro original: | Embrapa Cerrados (CPAC)

Exemplares:

CPAC - (8334-1) - ADD - SP - -- - CRI391 -  - CRI391 - DIS
CPAP - (28255-1) - ADD - SP - -- - SP0123 -  - 0123 - DIS