Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 2
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Variations of bioavailable Sr concentration and 87Sr/86Sr ratio in boreal forest ecosystems. Role of biocycling, mineral weathering and depth of root uptake Inra
Poszwa, A.; Ferry, B.; Dambrine, E.; Pollier, B.; Wickman, T.; Loubet, M.; Bishop, K..
The mean depth of Sr and water uptake in mixed Norway spruce (Picea abies) and Scots pine (Pinus sylvestris) stands was investigated, using natural variations of 87Sr/86Sr and 18O/16O in soils in relation to depth. Three spruce-pine pairs were studied on a podzol and a peat site in Northern Sweden. Tree leaf and wood, as well as soils, soil solutions and roots below each tree were analysed for Sr and Ca concentrations and 87Sr/86Sr ratio. The 18O/16O ratio was also determined in xylem sap and soil solutions in relation to depth. Soil solution 18O/16O decreased in relation to depth. Comparing with xylem sap 18O/16O data indicated a deeper uptake of soil water by pine than spruce on the podzol site and a superficial uptake by both species on the peat. The...
Tipo: Journal Article Palavras-chave: FORET BOREALE; ABSORPTION D'EAU; STRONTIUM; PROFONDEUR.
Ano: 2004 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB0500029289106727&uri=/notices/prodinra1/2010/12/
Imagem não selecionada

Imprime registro no formato completo
Xylem sap as a pathway for total mercury and methylmercury transport from soils to tree canopy in the boreal forest Inra
Bishop, K.H.; Lee, Y.H.; Munthe, J.; Dambrine, E..
Conifer needles are an important link in the cycling of Total Mercury (THg) and Methylmercury (MeHg) in the boreal ecosystem due to the high THg andMeHg concentrations in litterfall.Translocationwithin the tree ofHg fromsoils to the crowncanopy has been assumed to be a minor source of the Hg in litterfall. This paper, however, is the first to present direct observations of THg/MeHg transport from the soil via xylem sap. Xylem sap concentrations of THg and MeHg were measured in sap drained from different levels along the boles of freshly cut 100 year old Norway spruce (Picea abies) and Scots pine (Pinus sylvestris). The treescame from a mixed stand growing on podzolized till soils at the Svartberget Forest Research Station in N. Sweden. Soil solution...
Tipo: Journal Article Palavras-chave: FORET BOREALE; MERCURE; METHYLMERCURE; FEUILLE; SOL; TRANSPORT SOL PLANTE; XYLEME; LITIERE FORESTIERE; POLLUANT; METAL LOURD NORWAY SPRUCE; LITTER ; DEPOSITION; EMISSION; ENVIRONMENT; PLANTS; VAPOR; AIR; HG; ATMOSPHERIC DEPOSITION; LITTERFALL; MERCURY; METHYLMERCURY; XYLEM SAP .
Ano: 1998 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010da7bd4d&uri=/notices/prodinra1/2010/10/
Registros recuperados: 2
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional