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

... articleMeasurement 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 matterloss due to cutting (the ring width was approximately 7 mm for the two rings of Douglas ﬁr and 3.5 mm in width for the cambial age of 19 years, and 8 mm for the cambial age of ... water with the immersion objective, and the “deformed” image being that of the test pattern taken using the standard objective. The “deforma-tion” measured under these conditions on the pairs of images...

Báo cáo lâm nghiệp: " Quantification of nutrient content in the aboveground biomass of teak plantation in a tropical dry deciduous forest of Udaipur, Indi" pdf

... 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 teak plantation.MATERIALS ... Department of Environmental Science and Technology, Institute of Science and Technology for Advanced Studies and Research (ISTAR), Vallabh Vidyanagar, Gujarat, India2Department of Bioscience and...

Báo cáo lâm nghiệp: " Comparison of deposition fluxes on the open area and in mountain spruce stands of different density" pdf

... 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 found (Fig. 1). In the dense spruce stand the ... linear relationship between the amount of rain-fall on the open area and the amount of throughfall in the studied dense and sparse spruce stands was found. Water collected under the forest canopy...

Báo cáo lâm nghiệp: "Development of tertiary roads in the Lednice-Valtice Cultural Landscape" pps

... 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 areas do not cut forest stands). ... of forest stands and management instructions for single management sets of stands;– evaluation of the present forest opening-up condi-tions – to control the connection and its condition with...

Báo cáo lâm nghiệp: "Effect of climatic factors on the dynamics of radial increments of Norway spruce, European beech and sessile oak" potx

... 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 especially in May and July of the actual year ... and 25% of trees had a statistically signifi-cant positive correlation of annual increments and monthly precipitation in December and January. For 10% and 45% of trees the correlation of precipi-tation...

Báo cáo lâm nghiệp: "Effect of plant age, temperature and rainfall on Lepidoptera insect pests collected with light traps in a Eucalyptus grandis plantation in Brazil" docx

... 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 ... canexplain the adaptation of insects that feeds on endemic levelsin native plants in reforestations areas of eucalyptus in Brazil[23, 24]. These native plants have coevolved with insects and they ... richness and abundance of defoliating Lepidoptera associated with Eucalyptus grandis in Brazil and their response to plant age,Aust. Ecol. 26 (2001) 582–589.[25] Zanuncio T.V., Zanuncio J.C., Miranda...

Báo cáo lâm nghiệp: " Effects of ectomycorrhizal inoculation and the type of substrate on mycorrhization, growth and nutrition of containerised Pinus pinea L. seedlings produced in a commercial nursery" docx

... higheravailability of nutrients like Mg and K for the plant [18]. In the peat/composted pine bark substrate, the mixture of two organiccomponents gives a high C:N relation and this could be the cause for the ... [36]. The quality of a substrate for coniferproduction is directly related with its water retention capacity and the porosity [18], and usually a mixture of equal parts of sphagnum peat and vermiculite ... the nutritional status of P. pinea seedlings, and therefore their physiological quality. Inoculation of P. pinea with R. luteolus and R. roseolus increased the concentration of N and P in needles....

Báo cáo lâm nghiệp: "Effects of artificial damage on the branching pattern of Nothofagus dombeyi (Nothofagaceae)" ppsx

... 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 shootsper parent shoot were lower for t.1 and t.2 than for the ... the othertreatments of experiment 1 and lower for t.1 than for t.0 of experiment 2 (Fig. 6 and Tab. II). None of these sums wasaffected by the treatments of experiment 3. The Σ diameters and Σ ... Mean (+ s.e.) diameter (A), length (B) and number of nodes(C) of the largest offspring shoot relative to the mean diameter, length and number of nodes of the other offspring shoots (MDR, MLR and MNR,...

Báo cáo lâm nghiệp: "Effects of light intensity on the growth and energy balance of photosystem II electron transport in Quercus alba " potx

... influences the rate of electron transport by affectingphotochemical and non-photochemical mechanisms.2. MATERIALS AND METHODS2.1. Plant material and growth conditionsBefore 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 approximatedby 1–qP. Figure 4 also illustrates an estimate of the flux of ... nomenclature followed that of van Kooten and Snel [49]. The experiment implemented in the study was a complete rand-omized design, with light level as treatment, pot as replicate, and seed-ling within...

Báo cáo lâm nghiệp:"Effect of tube shelters on the growth of young Turkish pines (Pinus brutia Ten., Pinaceae)" pptx

... tube and observe whether their width and the number of stomatachange. In this way, the number of needles could allow us tohave an idea of the organogenesis and the leaf biomass alloca-tion and ... greater air temperature variations, aqualitative and quantitative modification of the light transmit-ted through the tube wall, the permanently very high relativehumidity of the air, and its very ... givenbelow, followed by the quantitative comparative analysis of stem growth.2. MATERIALS AND METHODS2.1. The study site and the plant material The study was conducted in 1999 at the Domaine Départementalde...

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