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Titolo:
Experimental in situ transformation of vermiculites to study the weathering impact of tree species on the soil
Autore:
Augusto, L; Ranger, J; Turpault, MP; Bonnaud, P;
Indirizzi:
INRA, Ctr Rech Forestieres Nancy, Equipe Cycles Biogeochim, F-54280 Champenoux, France INRA Champenoux France F-54280 es Biogeochim, F-54280 Champenoux, France
Titolo Testata:
EUROPEAN JOURNAL OF SOIL SCIENCE
fascicolo: 1, volume: 52, anno: 2001,
pagine: 81 - 92
SICI:
1351-0754(200103)52:1<81:EISTOV>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
ORGANIC-MATTER; FOREST SOILS; SOUTH SWEDEN; ACID DEPOSITION; ALUMINUM; SOLUBILITY; HORIZONS; ELEMENTS; SCANIA; FLUXES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Ranger, J INRA, Ctr Rech Forestieres Nancy, Equipe Cycles Biogeochim, F-54280 Champenoux, France INRA Champenoux France F-54280 him, F-54280 Champenoux, France
Citazione:
L. Augusto et al., "Experimental in situ transformation of vermiculites to study the weathering impact of tree species on the soil", EUR J SO SC, 52(1), 2001, pp. 81-92

Abstract

Weathering of soil minerals under forest seems to depend on the species present. To study the influence of tree species we placed unweathered vermiculites in the soil and assessed the impact in terms of saturation index of earth-alkaline cations and cation exchange capacity in 64 forest stands, dominated by different species and growing side by side at 20 sites on acidic soils. The vermiculites were of two types, one with a large charge and the other with a small charge. Minerals were maintained in the soil for 1 and 3years. The minerals placed in the topsoil and in soils with low buffering capacity were more acidified and weathered than those deeper in the soil and in less acid conditions. The vermiculites were transformed into hydroxylated interlayered vermiculites, and the formation of hydroxides in the interlayer space decreased the vermiculites' cation exchange capacities. The high-charge vermiculite had a greater affinity for aluminium than the low-charge variety. The effect of tree species was significant but small compared with factors such as soil type, depth and duration of incubation. Nevertheless, we can rank the acidifying and weathering caused by the trees in the followingorder: Picea abies, Abies alba >Pinus sylvestris, Pseudotsuga menziesii > Quercus spp., Fugus sylvatica. This in situ experimental approach enabled us to study potential trends in pedogenesis in few years.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 07:13:10