Báo cáo lâm nghiệp: "Measurement of free shrinkage at the tissue level using an optical microscope with an immersion objective: results obtained for Douglas fir (Pseudotsuga menziesii) and spruce (Picea abies)" potx
... article
Measurement of free shrinkage at the tissue level using a n optical
microscope with an immersion objective: results obtained for
Douglas fir (Pseudotsuga menziesii) and spruce (Picea abies)
Patrick ... spite of the matter
loss due to cutting (the ring width was approximately 7 mm for the
two rings of Douglas fir and...
... S.C., PANDE P.K., 1989. Patterns of litter nutrient
concentrations in some plantation ecosystems. Forest and
Ecology Management, 29: 151–163.
TSUTSUMI T., 1971. Accumulation and circulation of ... forest of Rajasthan, western India.
erefore, the main objective of the present study
is to quantify the nutrient content of aboveground
biomass in a 10 years old stand of...
...
of the studied stands. Water intercepted by the stand
canopy of the sparse stand was vaporized faster than
in the dense stand, the accumulation and consequen-
tial conflux of water below the ... distribu-
tion of precipitation. A linear relationship between
the amount of rainfall on the open area and the
amount of throughfall in the spruce stand was fou...
... virtue of these data from forest management plans
the main factors of the forest management must be
evaluated and the relations between the forest trans-
port network and forest maintenance of ... borders of forest owners
and spatial arrangement of the forest. at is why
there are no problems with the forest condition
evaluation (the borders of transport ar...
... June and July precipitation of the
actual year is most significant for 100% of trees and
for almost 80% of trees in this stand, and only for
10% or 5% of trees the precipitation in September
and ... (7): 293–302
of climatic factors is significant for each stand. For
most stands the precipitation in September and
October of the previous year and espe...
... temperature and rainfall during the five years of study with
Pearson correlation based on a significance level of 5% with the t test.
The effect of age of the plantation on monthly mean annual ... can
explain the adaptation of insects that feeds on endemic levels
in native plants in reforestations areas of eucalyptus in Brazil
[23, 24]. These native plants have c...
... higher
availability of nutrients like Mg and K for the plant [18]. In the
peat/composted pine bark substrate, the mixture of two organic
components gives a high C:N relation and this could be the
cause for the ... [36]. The quality of a substrate for conifer
production is directly related with its water retention capacity
and the porosity [18], and usually...
... significant level only for the MLR
and the MNR (Tab. II; Figs. 4B, 4C, 5B and 5C).
The Σ diameters, Σ lengths and Σ
nodes of offspring shoots
per parent shoot were lower for t.1 and t.2 than for the ... the other
treatments of experiment 1 and lower for t.1 than for t.0 of
experiment 2 (Fig. 6 and Tab. II). None of these sums was
affected by the tr...
... influences the rate of electron transport by affecting
photochemical and non-photochemical mechanisms.
2. MATERIALS AND METHODS
2.1. Plant material and growth conditions
Before the initiation of aboveground ... force of electron transport to the reduction of the redox state
of the primary electron acceptor of PS II, which is approximated
by 1–q
P
. Figure 4 also il...
... tube
and observe whether their width and the number of stomata
change. In this way, the number of needles could allow us to
have an idea of the organogenesis and the leaf biomass alloca-
tion and ... greater air temperature variations, a
qualitative and quantitative modification of the light transmit-
ted through the tube wall, the permanently very high relat...