Data/hora: 07/06/2024 17:03:23

Biblioteca(s): | Embrapa Cerrados.
Data corrente: | 27/01/2003
Data da última atualização: | 21/12/2011
Autoria: | LARDY, L. C.; BROSSARD, M.; ASSAD, M. L. L.; LAURENT, J. Y.
Título: | Carbon and phosphorus stocks of clayey ferralsols in cerrado native and agroecosystems, Brazil.
Ano de publicação: | 2002
Fonte/Imprenta: | Agriculture, Ecosystems and Environment, Amsterdam, v. 92, p. 147-158, 2002.
Idioma: | Inglês
Conteúdo: | In the central part of Brazil, the native savannah known as cerraado has undergone a rapid conversin into agricultural land. This study assessed carbon and phosphorus reserves in Latosols under dofferent types of savananah in derived pastures. Average total phosphoros(Pt) concentrations were 360 mg Ptkg-1 soil in A horizons and 212 mg Ptkg-1 soil in bw layers.organic phosphorus (Po) contents ranged from 86 to 194mg  Pokg-1 soil in topsoils and Po levels decreased in BA and Bw horizons,showing a similar pattern to the soil organic carbon depth distribution. The organic P represented 26-75% of the total P forms in the soil surface layers. Carbon (c) and P-stocks rangged from 23 to 30kg Cm-2 and 357 to 442 gPtm-2, respectively, in the 0-200cm profile. The 0-100cm layer contained more than 60 and 50% of C- and P- stocks, respetively. Higher values of C- and P-stocks for under natural vegetation dominated by graminaceae. Highly significant and positive linear relationships werw observed between organic or total P- and C-contents, and these highlighted the role of organic matter in soil P cycling in the Cerrado ecosystems. Pastures were found to increase the storage of C in topsoils as compared to the native ecosystems.
Thesagro: | Carbono; Cerrado; Composto Orgânico; Fósforo; Matéria Orgânica.
Categoria do assunto: | --
Registro original: | Embrapa Cerrados (CPAC)
Exemplares: | CPAC - (22744-1) - UPC - SP - -- - CRI6130 -  - CRI6130 - DIS