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Nitrogen deposition, mineralisation, uptake and leaching were measured on a monthly basis in the field during 2 years in six forested stands on acidic soils under mountainous climate. Studies were conducted in three Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] plantations (D20: 20 year; D40: 40 yr; D60: 60 yr) on abandoned croplands in the Beaujolais Mounts; and two spruce (Picea abies Karst...
AbstractThe decomposition and the fate of 15N- labelled beech litter was monitored in a beech forest (Vosges mountains, France) over 3 years. Circular plots around beech trees were isolated from neighbouring tree roots by soil trenching. After removal of the litter layer, 15N-labelled litter was distributed on the soil. Samples [labelled litter, soil (015 cm depths], fine roots, mycorrhizal root tips,...
The general process of nutrient cycling in forest stands is relatively well-known. Nevertheless, fluxes in representative ecosystems have not yet been quantified, certainly due to the amount of measurements required. The unavailability of such information is delaying the validation of models describing the ecosystem function.Numerous observations of nutrient stocks and fluxes carried out on a chronosequence...
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