Báo cáo lâm nghiệp: "Seasonal fluctuation in germination of short and longterm stored Norway spruce" ppsx
Báo cáo lâm nghiệp: "Seasonal fluctuation in germination of short and longterm stored Norway spruce" ppsx
... characteristics of GE and GC of analysed samples of short- term stored seed (S) and long-term stored
seed (L) in the first year (T1) and the second year of testing (T2)
Variant N
Germination energy (GE %) Germination ... values of germina-
tion energy (GE) and germination capacity (GC) in
individual months (M = 1, 2, 3 … 12), in total 10 for
short- term (...
Báo cáo lâm nghiệp: "Seasonal ionic exchange in two-layer canopies and total deposition in a subtropical evergreen mixed forest in central-south China" pps
... 5.5, and 4.3 in rainwa-
ter, 6.0, 6.6, 6.2, and 4.3 in throughfall and 7.0, 6.9, 6.1, and
4.7 in sub-throughfall in spring, summer, autumn, and winter,
respectively.
Ion exchange in canopies and ... pH of rainwater in summer (4.3)
and winter (4.3) was very low, being a little bit higher in spring
(4.7). As said, rain quantity in spring and summer accounted
fo...
Báo cáo lâm nghiệp: "Mineral nutrition in relation to the Norway spruce forest decline in the region Horný Spiš (Northern Slovakia)" docx
... manganese and mainly of aluminium.
e low content of potassium also indicates the
insufficiency of water regimen both in soil and in
individual spruce trees. e generally hypothesised
deficiency of ... were planted in
the soil from the decomposing stand and compared
with both yellowing and green seedlings planted in
the soil from the beech stand (Table 8).
Phenomen...
Báo cáo lâm nghiệp: "Species composition in low mountain beech (Fagus sylvatica L.) stands in the Bieszczady National Park under the global warming" doc
... share of 88.7% in the number of trees and 84.9%
in the total stand volumes. Additional tree species
include fir (5.7% in the tree count and 9.5% in stand
volumes) and sycamore (3.8% and 3.5% ... contribute
to the future development of mature beech stands
in Bieszczady. Both in undergrowth and in natural
seedlings significant increase in the number of beech...
Báo cáo lâm nghiệp: "Chemical thinning in blue spruce (Picea pungens Engelm.) stands and its effects on cambioxylophagous fauna" docx
... standing trees maintain higher relative air hu-
midity in the stand, do not hinder the development of
newly planted seedlings and their eventual break-up
and decomposition aid nutrient cycling. ... of dieback and
species spectrum are close to qualitative changes in
the phloem and the structure of fauna on standing
spruce breaks in stands of the 2
nd
and 3
rd
age...
Báo cáo lâm nghiệp: "Contribution to the knowledge of Clethrionomys glareolus populations in forests of managed landscape in Southern Moravia (Czech Republic)" pot
... vary in quality and quantity between seasons and
habitats. In years with small or failed seed crops
rodent numbers are lowest in spring. en, during
summer they increase due to breeding and ... Reproduction ceases
in autumn, and high winter mortality leads again to
low numbers of rodents in the subsequent spring.
Changes in rodent numbers are linked to the bio-
mass...
Báo cáo lâm nghiệp: "Timber harvesting in the ukrainian carpathians: Ecological problems and methods to solve them" ppsx
... ruts, degree of damage to the bearing surface and
soil sampling.
Before the beginning of investigations the radius of
turns, lengths of linear plots, weight and geometrical
parameters of a tractor ... number of restrictions on
the utilization of certain ways of timber cutting and
certain systems of machinery.
To work out particular principles in detail and to...
Báo cáo lâm nghiệp: "Contribution to the knowledge of Apodemus sylvaticus populations in forests of the managed landscape of southern Moravia (Czech Republic)" potx
... beginning of November
only in one case in RB and HA localities. Apodemus
sylvaticus reproduced until August even in the years
of abundance culmination. e gradual decline of the
population of ... peaks in the course of monitored
years depending on the crop of small-seed species in
2001 and of acorns in 2003 and 2006. e preference
of small seeds of tre...
Báo cáo lâm nghiệp: "Multiaged silviculture in North America" potx
...
silviculture and is often found in multiaged stands of
natural origin because of frequent, low-severity fires.
A variety of methods were used for controlling stock-
ing (see O’H 2002) including initially ... 80.312 70.912 46.638
Stand density index ECC 137.3 115.7 84.5 50.5 388.0
Stand density index BCC 62.3 57.8 38.4 158.5
ECC – end of cutting cycle; BCC – beginning of...
Báo cáo lâm nghiệp: "Available nitrogen in the surface mineral layer of Serbian forest soils" docx
...
N
min
‒ quantity of mineralized N without subtraction of
the initial content of available mineral N (for the
anaerobic incubation of NH
4
+
-N content);
N
initial
‒ initial content of available ... formula:
ANI =
initial
initial
–
min
N
NN
(3)
where:
N
min
– quantity of mineralized N without subtraction of
the initial content of available mineral N (for the
anaerob...
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