Báo cáo lâm nghiệp: "Picea glauca dynamics and spatial pattern of seedlings regeneration along a chronosequence in the mixedwood section of the boreal forest" potx
Báo cáo lâm nghiệp: "Picea glauca dynamics and spatial pattern of seedlings regeneration along a chronosequence in the mixedwood section of the boreal forest" potx
... tremuloides and the resultantcanopy gaps formed, appear to be critical for P. glauca regen-eration in mature and old stands. Natural regeneration may beenhanced by taking advantage of the advanced regeneration during ... Recruitment pattern of P. glauca seedlings changed along the chronosequence. L(t)analysis (Fig. 4) showed that the spatial distribution of P. glauca seedlings was mainly random in 5, 16, 76, 77 y stands. In ... constituted96% of the total basal area in a 16 y stand and remained the dom-inant tree species until 93 y. Picea glauca dominated the treecanopy between 93 and 172 y coinciding with increasingP. tremuloides...
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Báo cáo lâm nghiệp:"Individual-tree growth and mortality models for Scots pine (Pinus sylvestris L.) in north-east Spain" docx
... BAL competition index measuring the totalbasal area of larger trees; T, G and SI are stand age (years), basal area(m2 ha–1) and site index (m) at an index age of 100 years, respec-tively. ... in north-eastSpain. The plots were located in the provinces of Huesca, Lérida and Tarragona. The plots were naturally regenerated and thinned after the second measurement. The sites ranged in ... of larger trees) and stand-level (site, basal area and age) characteristics and their transformations as predictors. The pre-dicted variable was the five-year diameter growth. This was obtainedas...
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Báo cáo lâm nghiệp: " Root system development and health condition of sycamore maple (Acer pseudoplatanus L.) in the air-polluted region of Krušné hory Mts" ppt
... composition of forest stands being rather low, the study of the species and mainly of its root system has been paid little attention so far. Available data which are however of rather general character ... region of Krušné hory Mts. and in the region of Bohemian-Moravian Upland or in a mu-tual comparison between the two regions (see stand situation 5, mutual comparison of stand situation 2 and ... planting). It results from the fact that transplants have more abundant roots than naturally developing seedlings already from the nursery and the root system is me-chanically treated during...
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Báo cáo lâm nghiệp: "Forest yield index and its applicability to the assessment of future forest yields" docx
... is parameter is the main component of the classic Faustman model of periodical land revenue, and it is close to the com-mercial value of standing timber at the rotation age. In general, it ... represents the age of the synergic culminating effect (culminating mean increment) of technical, economic and value benefits of a forest stand, and depends on tree species, site index and stand density. ... parameter “value of final cutting yield” elaborated and published by T et al. (2003) for the purposes of forest evaluation in Slo-vakia was used as a parameter for the quantification of...
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Báo cáo lâm nghiệp: "Air pollution load and stand nutrition in the Forest District Jablunkov, part Nýdek" docx
... surface, in an open area, and close to the most dam-aged locality. ey are changed in four-week inter-vals. e analysis of dosimeters and the calculation of concentrations are done by the ... taken separately (A) . e mixed stand sample was analyzed. e mixed sample was composed of three spots in each stand.Chemical analyses were done in the FGMRI labo-ratory. e amount of available ... analyses. In the humus layer of the two stands, the amounts of Ca were comparable, however, the total amount of this element was higher in the spruce stand due to a thicker humus layer. In mineral...
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Báo cáo lâm nghiệp: "Temperate forest trees and stands under severe drought: a review of ecophysiological responses, adaptation processes and long-term consequences" ppt
... physiologically linked in poplars:drought-induced cavitation underlies branch dieback that re-duces transpiration demand enabling the remaining shoot tomaintain a favourable water balance. Such an interpretationcould ... potential all along the path-way. In addition, the decrease of soil-water content results in an increase of the hydraulic resistance within the soil and at the soil-root interface. As a result of ... measurements of seasonal patterns of soilwater content and of tree transpiration and leaf water poten-tials, and of climatic data [19]. The gradual increase in the resistance to water flow from...
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Báo cáo lâm nghiệp: "Post-transplant root and shoot development in Abies nordmanniana Spach. seedlings after whorl bud and branch pruning" potx
... including length of both tap and lat-eral roots, doubled from time of transplanting in April tofirst sampling in June in untreated controls and in seedlings in which whorl and lateral buds and ... taproot and lateral roots arescanned separately and that a resolution at 300 dpi with black and white background and threshold automatically gives the best correla-tion to manual determination of ... 14].As part of a project to stimulate new leader growth the aimwas to study root and shoot development of A. nordmanni-ana seedlings after transplanting, when whorl and lateral buds and whorl...
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Báo cáo lâm nghiệp: "Divergence among species and populations of Mediterranean pines in biomass allocation of seedlings grown under two watering regimes" pps
... biomass allocation in Mediterranean pines 91Table III. Proportion of the variance due to treatment, population and treatment by population interaction in the intra-specific analysis and significance ... the four populations together), the same ranking was found in both treatments for height and diameter growth, total biomass and leaf and stem biomass, with Pinus pinea attaining the highest values, ... present, little information was available on the mor-phological changes induced by water stress during the initialdevelopmental stages of Mediterranean pines and its variabil-ity within and between...
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Báo cáo lâm nghiệp: "Canopy fuel characteristics and potential crown fire behavior in Aleppo pine (Pinus halepensis Mill.) forests" pptx
... correlated with the stand basal area. As the size and/ or the stem density of the trees in a stand increases, the CFL and CBD also increase due to the higher fraction of avail-able crown fuel load. ... char-acteristics and stand structure parameters (Tab. IV). A strongpositive correlation was found between CFL and stand basalarea, and a weak positive correlation between CBD and standbasal area. The data ... factors in wildfires along the Mediterranean coast of the Iberian Peninsula, in: Trabaud L. (Ed.),Fire management and landscape ecology, International Association of Wildland Fire, Fairfield, Washington,...
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Báo cáo lâm nghiệp: "Differential photosynthetic and survival responses to soil drought in two evergreen Nothofagus species" docx
... Universidad Austral de Chile for their logistic support and maintenance of the experiment, E. Gianoli for use of his IRGA and The Nature Conservancy and the Reserva Costera Valdiviana for ac-cess ... drought intensity [6] the same PPFD became probably saturating at a Ψmlower than−2.5 MPa, producing the increase of NPQ in N. dombeyi and the concomitant decrease in Fv/Fm, ∆F/Fm and qP. In conclusion, ... fit was calculated using likelihood ratio statistics, and effect significance was estimated with the Wald test [22].Data of gas exchange and fluorescence were ordered and ana-lyzed in three ranges...
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