Schueller J., Rolland
C. (1994). Influence stationnelle sur la croissance du Pin à crochets (Pinus
uncinata Ramond). Schweizerische Zeitschrift für Forstwesen, Sep
1994, Vol 145, n° 9, pp. 739-755.
- TITLE Mountain pine (Pinus uncinata)
height and radial growth in various growth conditions.
- LANGUAGE French with German abstract
- SUBJECT Ecology, Tree Growth
- KEY WORDS Pinus uncinata, radial growth,
altitude, slope, exposure.
- SPECIES Pinus uncinata Ramond.
- SITES Briançonnais, South-East of France,
Fifteen forests with mountain pine (Pinus uncinata Ramond) are studied
in the Briançonnais and the Queyras (in the driest part of the French Alps),
in various altitudes, soils and exposure conditions. Dominant tree heights are
measured, and 270 cores with 41 151 ring-widths are analysed with
dendroecological methods. The optimal growth of this species is observed on
subalpine northern slopes with calcareous soils (where the mean tree height is
17.7 meters), whereas the trees measure only 13.4 m. in the siliceous
subalpine area, and 12.3 meters at the lowest altitude. At 100 years old, the
trunk radius is comprised between 4.8 centimetres and 11 cm, and the mean
radial annual growth ranges from 0.48 to 1.10 mm per year. On calcareous soil,
the growth is +14.2 % better for South facing slopes than for the northern
ones at low altitudes, and +18.6 % at high elevations.