[article]
| Titre : |
Effects on soils of an oak invasion of a Calluna heath, Denmark, I. Morphology and chemistry |
| Type de document : |
texte imprimé |
| Auteurs : |
Knud Erik Nielsen, Auteur ; Kristian Dalsgaard, Auteur ; Per Nørnberg, Auteur |
| Année de publication : |
1987 |
| Article en page(s) : |
pp. 79-95 |
| Langues : |
Anglais (eng) |
| Catégories : |
[habitats/milieux] 31 - Landes et fruticées
[Espèces (in biblio)] Calluna
[Thèmes] Relation sol - végétation
|
| Mots-clés : |
changement de végétation |
| Résumé : |
"Where oak has been invading Hjerl Hede for the last century, four profiles were described and sampled for analyses in a trench extending into a Calluna stand from a pioneer oak about 70 years old. Three additional profiles were studied, one opposite to the oak, a second in another stand of Calluna and a third in an oak forest. Comparisons were then made of the morphology and chemistry of the profiles to identify early changes associated with the invasion.
Principal differences attributed to the oak invasion were a marked reduction in the surface layer of organic matter and its conversion from mor to moder, a slight increase in pH of the uppermost horizons under the oak, slight changes in colours from black to brown in deeper horizons and the blurring of their boundaries. Amounts of iron extractable by pyrophosphate and tetraborate from the B horizons in the trench were smaller under the oak than under the Calluna." (source : auteurs) |
| Type de publication : |
périodique |
| Référence biblio : |
Nielsen K., Dalsgaard K., Nørnberg P., 1987 - Effects on soils of an oak invasion of a Calluna heath, Denmark, I. Morphology and chemistry. Geoderma, 41 : 79-95. |
| ID PMB : |
70409 |
| Permalink : |
http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=70409 |
in Geoderma > vol. 41, n°1-2 (Année 1987) . - pp. 79-95
[article]
|
Effects on soils of an oak invasion of a Calluna heath, Denmark, I. Morphology and chemistry in Geoderma, vol. 41, n°1-2 (Année 1987)