Effet des substitutions d'essences forestières sur l'évolution des sols et de leur minéralogie : bilan après 28 ans dans le site expérimental de Breuil (Morvan)

Abstract : The aim of this work was to measure the effect of different forest species on the same acid soil and its mineralogy. The site was described in detail by studying the parent material and a soil profile. The study was carried out at Breuil Experimental Site in Morvan, France, which was set up in 1976. The species studied were: native forest species in a broad-leaved Coppice with Standards (CwS), oak, beech, Norway spruce, Douglas fir, Nordmann fir and Corsican Laricio pine. Several methods were used: i) the physico-chemical properties of the fine earth; ii) the mineralogy of the fine soil fractions; iii) the present functioning of the soil using vermiculite placed in situ in the soil as a test-mineral, in parallel with a dissolution experiment on the same mineral in a controlled environment; and iv) the physico-chemical and mineralogical properties of the rhizospheric soil under oak and spruce. The results indicated that the granite was acid and very poor in basic cations. In comparison with the broad-leaved trees, the conifers caused additional desaturation and acidification of the exchange complex of this soil. Examination of the clay fraction showed that Douglas fir and pine caused a much greater dissolution of certain clay mineral phases than the spruce and broad-leaved trees. Mineral weathering was also greater in the rhizospheric soil, than in the total soil, especially below spruce which was related to the ammoniacal form of nitrogen nutrition. Changes observed in the solid soil phase were satisfactorily explained by the integration of the properties of the bio-geo-chemical cycle of each species. This study provides interesting information relevant to forest managers.
Document type :
Theses
Complete list of metadatas

https://hal.univ-lorraine.fr/tel-01748445
Contributor : Thèses Ul <>
Submitted on : Thursday, March 29, 2018 - 11:35:11 AM
Last modification on : Monday, April 16, 2018 - 10:40:19 AM
Long-term archiving on: Friday, September 14, 2018 - 9:12:02 AM

File

SCD_T_2008_0051_MARESCHAL.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : tel-01748445, version 1

Collections

Citation

Louis Mareschal. Effet des substitutions d'essences forestières sur l'évolution des sols et de leur minéralogie : bilan après 28 ans dans le site expérimental de Breuil (Morvan). Sciences de la Terre. Université Henri Poincaré - Nancy 1, 2008. Français. ⟨NNT : 2008NAN10051⟩. ⟨tel-01748445⟩

Share

Metrics

Record views

23

Files downloads

65