Báo cáo lâm nghiệp: "Water and bioelement fluxes in four Quercus pyrenaica forests" ppt
Báo cáo lâm nghiệp: "Water and bioelement fluxes in four Quercus pyrenaica forests" ppt
...
drainage
does.
More-
over,
the
vegetation
shows
great
depen-
dence
on
the
rains
of
the
dry
season,
but
Original
article
Water
and
bioelement
fluxes
in
four
Quercus
pyrenaica ...
rain
intensity,
slight
slopes,
high
infiltration
and
absence
of
impermeable
layers
near
the
soil
surface.
Drainage
Drainage
(D)
increased
with
rainfall
(figs
1
and...
Báo cáo lâm nghiệp: "arbon and nutrient stocks in mature Quercus robur L. stands in NW Spai" docx
... at random at six points
within each stand and combined to form three bulked samples. Sam-
ples were taken using a metal ring (diameter 30 cm) and all plant ma-
terial was removed from the ring. ... the
four Quercus robur stands studied.
height (d) was the only independent variable included in the
allometric model. Addition of stand variables to take into ac-
count the differences in...
Báo cáo lâm nghiệp: "Heat and drought 2003 in Europe: a climate synthesis" ppt
... Western Switzerland.
July was less extreme than June and August, except in Swe-
den, Finland and Norway. On most of the continent, both min-
imum and maximum air temperature were between 1 and 3
◦
C
above ... temperatures in June
and August also reached values more than 4
◦
C above nor-
mal in a smaller region, mainly in the South-West, from East-
ern Spain to Southern Germa...
Báo cáo lâm nghiệp: "Litterfall and mineral return in two cork-oak forests in northeast spain" pot
...
and
twigs
which
indicates
readiness
in
translocation,
especially
for
N
and
P,
and
also
by
the
occurrence
of
sea-
sonal
variations
in
the
litterfall
mineral
con-
tent.
In ...
representing
46
to
78%
of
the
total litterfall
weight,
varying
according
to
the
site
and
year.
The
main
leaf-fall
period
occurred
in
June,
July
or
at
the be-
ginning...
Báo cáo lâm nghiệp: "Summer and winter embolism in oak: impact on water relations" potx
...
may
not
influ-
ence
freezing-induced
dysfunction.
How-
ever,
Ewers
(1985)
studied
bubble
forma-
tion
while
freezing
and
thawing
water
in
small
glass
capillary
tubes
and
observed
that ...
in
response
to
freeze-thaw
cycles
and
water
stress
in
ring-porous,
diffuse-porous,
and
conifer
species.
Plant
Physiol
100,
605-613
Sperry
JS,
Saliendra
NZ
(1994...
Báo cáo lâm nghiệp: "Starch and soluble carbohydrates in leaves of water-stressed oak saplings" ppsx
...
remained
at
levels
close
to
those
of
control
plants
in
lupin
or
grapevine
(Quick
et al,
1992).
In
contrast
to
starch
and
sucrose,
a
five-
fold
increase
was
observed
in ...
potential
(Ψ
wp
)
and
net
CO
2
assimilation
rates
(A)
in
control
and
water-stressed
leaves
of
Quercus
petraea
saplings
(mean
of
four
replicates
±
standard
error...
Báo cáo lâm nghiệp: "Regeneration and game damage in the Krušné hory Mts. assessed on the basis of National Forest Inventory of the Czech Republic" pps
... assessment of peeling and browsing intensity
was carried out in two categories including individu-
als with dbh from 7 cm to 11.9 cm and individuals
with dbh from 12 cm to 20 cm. Individuals with ... preserve during repeated
investigation in comparison with the rest of the
investigated territory. In the course of five years, in
relation to the original points and on the basi...
Báo cáo lâm nghiệp: "Heartwood and sapwood variation in Eucalyptus globulus Labill. trees at the end of rotation for pulpwood production" potx
... negative in uence on the pulping quality increas-
ing chemical consumption in pulping and bleaching, decreas-
ing pulp yield and pulp brightness, and increasing process
costs [20]. For the pulp and ... by Wilkins [28] in E. grandis, although some
other studies in Pinus radiata [4] and E. grandis [3] have
found linear relationship of these two variables.
In conclusion, the r...
Báo cáo lâm nghiệp: "Fingerprinting and genetic variability in cork oak (Quercus suber L.) elite trees using ISSR and SSR markers" ppsx
... obtained in the samples in-
dicates the advantage of these selected elite-trees in the de-
velopment of breeding programs, and the usefulness of SSR
and ISSR markers in breeding experiments and ... www.afs-journal.org
DOI: 10.1051/forest:2007057
Original article
Fingerprinting and genetic variability in cork oak (Quercus suber L.)
elite trees using ISSR and SSR markers
Ai...
Báo cáo lâm nghiệp: "Morphological and functional variability in the root system of Quercus ilex L. subject to confinement: consequences for afforestation" ppt
... root spi-
ralling, and holes in the base facilitate drainage and encourage
air pruning of roots. Continual air pruning induces a limita-
tion to the main root growth by shortening its length ... = 22).
A
R
and V
R
were about 38% and 88% higher, respectively, in
LT than in ST, whereas D
R
was about 50% higher in ST than
in LT and DRW was about 50% higher in LT and ST th...
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