Báo cáo lâm nghiệp: " Conversion of even aged forest managed under the system involving coupes to selection forest in Klepačov J Šilhánek" docx
Báo cáo lâm nghiệp: " Conversion of even aged forest managed under the system involving coupes to selection forest in Klepačov J. Šilhánek" docx
... typical
of even- aged forest managed under the system involv-
ing coupes. e peak of the curve has been success-
fully lowered during the conversion by phytotechnical
measures supporting the forest ... degrees in the selection forest can be at-
tributed the same informative value as the division
into age classes in the even- aged forest (S...
Báo cáo lâm nghiệp: "Influence of cross section dimensions on Timoshenko’s shear factor – Application to wooden beams in free-free flexural vibration" ppsx
... three-dimensional
elasticity theory and takes the size effect of the cross section
into account. Numerical shear factor values are calculated
according to variations in the height/width ratio of the cross sec-
tion. The ... shear effect
and rotary inertia can be taken into account to extend the range
of applicability of the Euler-Bernoulli theory of beams [7].
Th...
Báo cáo lâm nghiệp: "Conversion of a natural broad-leafed evergreen forest into pure plantation forests in a subtropical area: Effects on carbon storage" pps
... When examining the total eco-
system carbon pool, tree biomass proves to be the main con-
tributor to the carbon gains across the study sites. This
dominance is in line with other studies of tropical ... cochinchinensis and Symplocos stel-
laris) in the NF, 12 of C. kawakamii in the CK, 11 of O. xylocarpa in
the OX, 12 of F. hodginsii in the FH, and 12...
Báo cáo lâm nghiệp: "Effect of gibberellic acid and ethephon on the germination of European beech dormant and chilled beechnuts" pptx
... for 5 to 7 days before mixing them into the germination substrate.
In treatments 6–9 dormant beechnuts were hydrated by sprinkling them with tap water to increase their moisture
content to 30%, ... due to
the increasing risk of moulding.
Our germination test of beechnuts was done at
the same temperature (3–5°C) as the pre-sowing
(dormancy release) treatment. While acco...
Báo cáo lâm nghiệp:"Effects of field vegetation control on pine weevil (Hylobius abietis) damage to newly planted Norway spruce seedlings" ppt
... ones in protecting seedlings from the pine weevil. Thus,
physical changes in the scarified patches, e.g. compaction of
the surface layer, seem to be of minor importance for the pine
weevil. There ... that they will remain in the area and feed on seedlings.
In the present study it was not possible to evaluate the effect
of mosses in the scarified patches. It...
Báo cáo lâm nghiệp: "Discrimination of coated carbide tools wear by the features extracted from parallel force and noise level" potx
... of the cutting edge along the
edge of the disk (work material) with depth of cut of 1 mm. The disk
was fed down into the corner of the cutting edge in the speed of
0.05 mm/rev. When the cutting ... good indication for the extent of wear on cutting edge of
the tools.
2. The tool materials (coating materials) are observed to
determine the rate of t...
Báo cáo lâm nghiệp: "Effects of watering after lifting and exposure before planting on plant quality and performance in Oriental spruce " pptx
...
root
system.
Even
root
growth
may
be
promoted
by
subjecting
them
to
drought,
or
short-term
exposure
may
not
affect
the
root
growth
of
Oriental
spruce
stocks
as
determined
in
macrocarpa ...
153-
159
Rook
DA,
Menzies
MI
(1981)
Methods
of
determining
physiological
quality
of
planting
stock.
In:
Forest
nursery
and
establishment
practice
in
New...
Báo cáo lâm nghiệp: "Use of stem diameter variations for detecting the effects of pathogens on plant water status" pptx
...
depression
of
the
stem,
owing
to
the
necrosis
of
the
bark
and
vascular
tissues.
They
averaged
10
cm
in
length
at
the
end
of
the
experiment.
The
stem
diameter
evolution
of
plants
for ...
stevensii
began
to
develop
stem
cankers
in
the
third
week
after
inocu-
lation
(31
May-6
June).
An
early
symptom
of
canker
formation
was
the...
Báo cáo lâm nghiệp: "Dynamics of natural regeneration of even-aged beech (Fagus sylvatica L.) stands at different shelterwood densities" pot
... 4% in plot 2) doubled the aver-
age in the rest of the plots, while the percentage of
litter amounted to 93% in plot 2 and averaged 62 on
the other plots. On the other hand, the evaluation
of ... regeneration in the four PRP’s. is concurs
with the proportion of species in the canopy, since
beech represents 99.2% of the canopy individuals
in t...
Báo cáo lâm nghiệp: "Comparison of mycobiota of diverse aged spruce stands on former agricultural soil" pot
... funcionality of forest ecosystems
depend on aggregate impacts of biotic and abiotic
factors. Numerous fungi species are considered as
sensitive bioindicators of “Ectotrophic Stability of
Forest ... noticed to be the most interesting for a
comparative analysis of fungi species diversity and
abundance of mycorrhizal, saprotrophic terrestrial
Supported by the Ministry...
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