Data/hora: 21/06/2024 13:34:15

Biblioteca(s): | Embrapa Semiárido.
Data corrente: | 10/02/2012
Data da última atualização: | 06/06/2023
Autoria: | GIONGO, V.; GALVÃO, S. R. da S.; MENDES, A. M. S.; GAVA, C. A. T.; CUNHA, T. J. F.
Afiliação: | VANDERLISE GIONGO, CPATSA; SANDRA REGINA DA SILVA GALVÃO; ALESSANDRA MONTEIRO SALVIANO MENDES, CPATSA; CARLOS ALBERTO TUAO GAVA, CPATSA; TONY JARBAS FERREIRA CUNHA, CPATSA.
Título: | Soil organic carbon in the brazilian semi-arids tropics.
Ano de publicação: | 2011
Fonte/Imprenta: | Dynamic Soil, Dynamic Plant, v. 5, p. 12-20, 2011.
ISSN: | 1749-6690
Idioma: | Inglês
Notas: | Special issue 1.
Conteúdo: | The Brazilian semi-arid tropics occupies an area of 969,589 km2 that represents 11% of the national territory and the Caatinga is its most representatives Biome with an area of 844.453 km². However, approximately 46% of this area is deforested. The conversion of Caatinga preserved vegetation in degraded areas has contributed to global climatic changes; therefore, a series of scientific research studies has as its objective to quantify the C reservoirs in different semi-arid regions of the world, as well as to identify the factors that control its dynamic. Recently, network research studies for measuring C stock and balance in natural vegetation and disturbed areas, firstly related to livestock and dry land farming that are dominant activities in the region, and secondly related to irrigated agricultural exploitation due to its high impact in the productive system, have been developed. The studies comprise C determination in soil, plant, micro-organism and atmosphere systems, involving C and energy balance and the effect of land use on C stock relations. C stocks in the Brazilian semi-arid tropics varies from 20 to 48.4 t ha-1 at 0-20 cm soil layer, while for the aerial part of natural vegetation the values vary from 1 to 80 mg ha-1. It can be observed, for the same soil and vegetation type, that changes in land use decrease soil C stock and that plant cover management can behave as C source.
Palavras-Chave: | Semiárido.
Thesagro: | Caatinga; Carbono; Matéria Orgânica; Solo; Uso da Terra.
Thesaurus Nal: | Soil organic carbon.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/53766/1/Vanderlise-2011.pdf
Registro original: | Embrapa Semiárido (CPATSA)
Exemplares: | CPATSA - (46614-1) - UPC - AP - DD -  -  -  - DIS