Báo cáo lâm nghiệp: " Biomass and composition of understory vegetation and the forest floor carbon stock across Siberian larch and mountain birch chronosequences in Iceland" docx
... the dominance of dicots in the ground flora of
the birch forests (Fig. 4).
3.7. Carbon stocks of the forest floor
Changes in plant growth forms altered the relationship
between C -stock and forest ... DISCUSSION
4.1. Effects of afforestation on the ground vegetation
biomass and composition
Both larch and the native birch caused a decline...
... At the first place the covering of
the northern slope of the outside spoil bank of the
Bełchatów brown coal mine consisted of the follow-
ing formations: sands (loose and coarse), medium
sands ... years since the beginning of reclamation
of the northern slopes of the outside spoil bank of the
Bełchatów brown coal mine by reforestation there
have been f...
... they are declining due
to the ever-increasing demand for timber and to the need of
agriculturally suitable land [61]. In the Yungas, an example
of an indigenous tree used for firewood, pulp, and ... the possibility of the occurrence
of other kinds of mycorrhizal associations in the species
examined, an absolute dominance of AM was observed in
these plants. The...
... from
the end of the preceding growing season (1994) to the beginning
of the current one. In comparing the carbon balance to biomass
increment, we assumed that carbon uptake during the growing
Figure ... compare the biomass incre-
ments and carbon balances of the study trees.
2. MATERIALS AND METHODS
2.1. Site
The study was conducted in the state f...
...
stand
than
in
the
Italian
stands.
N,
Ca
and
Mg
recycled
in
the
same
proportion
in
all
stands.
In
contrast,
twice
as
much
P
and
K
was
recycled
in
the
Italian
stands ...
of
the
Massif
Central
in
the
Cevennes
mountains,
about
100
km
north
of
Montpellier.
Although
there
were
few
climatic
differences
and
the
elevations
of
the...
... concerns all mountain forests, in-
cluding the area of the Beskidy Mts. (Beskid Śląski
in the northern, Beskid Żywiecki in the southern
part of the area described in this paper), located
in the western ... almost the whole area of the West-
ern Beskidy region. Along with the increase of the
size of salvage cuttings (including the removal of in-...
... Academy of Sciences of the Czech Republic, Grant No. A600870701, and by the Ministry of
Education, Youth and Sports of the Czech Republic, Projects No. 2B6068 and MSM 6215648902, and by the Governmental ...
RESULTS AND DISCUSSION
At the end of growing season 2002, the mean tree
height and stem diameter (at one tenth of tree height
above the ground) w...
... main
tree species, the input data being the tree diameter
and height, quality of the bottom third of the stem
(A, B, C), stem damage (yes, no), and in the case of
the beech also the age and ... upon the decision
of the Ministry of Agriculture from July 1, 2004. It
was performed on all lands covered by forest tree
species, i.e. on forest lands and...
... change the species
composition of the biocenosis favouring the survival of the
most xerophytic species, Q. pubescens, and the reduction in
number of individuals of Q. cerris and Q. frainetto ... areas in the Southern Hemi-
sphere, e.g. New Zealand, Chile and Australia [56], and in
the Northern Hemisphere, e.g. Northeast of the USA [158],
East of Chi...