... original
Estimation de l’accroissement et de la production forestière
à l’aide de placettes permanentes concentriques
Jacques HÉBERT, Nils BOURLAND, Jacques RONDEUX*
Faculté universitaire des Sciences ... placettes circulaires uniques de
rayon fixe (18 m) équivalentes à la plus grande des placettes
concentriques. De cette manière, nous avons pu procéder...
... However, no statistical relation was found
between forest decline symptoms and bark beetle
attacks in study of P et al. (1996).
Several studies have been performed in order
to assess the factors ... necessary
to repeat manipulated experiments with higher
number of inoculated beetles and on different po-
sition on the trees (on stem under canopy).
Acknowledgements
We particularly tha...
... P et al. 2000; G-
et al. 2008).
e aim of this study was to determine optimal
dates of conversion of Scots pine stands growing at
unsuitable sites in conditions of the Polish Lowland. ... stands but these relationships get
reversed at older age.
– e mean value of pine stands from unsuitable
sites increases only to the age of 80 years and later
on this value decreases...
... T.T., PALLARDY S.G., 1997. Growth Control
in Woody Plants. San Diego, Academic Press.
KÜHNE C., BARTSCH N., RÖHRIG E., 2005. Waldbauliche
Behandlung der Auenwälder am Oberrhein unter beson-
derer ... Berücksichtigung der Stieleiche (Quercus robur
L.). Schriften aus der Forstlichen Fakultät der Universität
Göttingen und der Niedersächsischen Forstlichen Ver-
suchsanstalt, 140.
LARSEN H.S.,...
... the tree death.
e area with an epidemic population of I. ty-
pographus is characterized by a much narrower
species spectrum compared to that with an en-
demic population of the beetle. It ... (ed.): e
Development of Biotic Communities after Windthrow.
Landsberg, Ecomed: 292–314.
S F. (1955): Pathogenese der Borkenkäfer-
Epidemie 1946–1950 in Nordwest-deutschland. Schrifte...
... by the calcu-
lated statistically signifi cant correlation between
the foliar content of N and P and the degree of
damage to underplantings caused by nutrient
de ciency. e degree of damage ... et al. (2003), who
demonstrated a correlation between the crown de-
foliation and sulphur deposition levels at the end of
Table 6. e matrix of correlation coeffi cients between selected elemen...
...
are considered to be a new class of plant hormones
implicated also in the regulation of somatic and
zygotic embryogenesis (K et al. 1998; S
et al. 2004). PAs have a wide spectrum ... only were desiccated.
e embryos were carefully transferred on dry paper
in small Petri dishes (3 cm in diameter). ese open
dishes were placed into large Petri dishes (18 cm in
diameter) wit...
... International Plant
Propagators’ Society, Vol. 53: 575–576.
CORNU C. et al., 1977. Recherche des meilleures conditions
d’enrancinement des boutures herbacées de chêne rouvre
(Quercus petraea /M./ ... overlap, differences are
statistically significant
Table 1. Diameter growth of large-sized plants of beech (plug 1.5 + 2 + 1) on Trutnov 2 PRP (planting in 1993, n = 95)
Breast-height diam...
... on a
fluvio-glacial substrate (40%) that belongs to the
vegetation unit Betuleto-Alnetum, and bilberry-
spruce with fir (10%) that belongs to the vegetation
unit Piceetum abietinum higher ... root-diameter class, but it was
only 0.18 in the last root-diameter class. We found
out an unproportionally higher relative value of the
average number of root branches in the first root
diameter ....