Báo cáo lâm nghiệp: "Influence of marine salts on the localization and accumulation of surfactant in the needles of Pinus halepensis Mill" ppsx
Báo cáo lâm nghiệp: "Ground based operation effects on soil disturbance by steel tracked skidder in a steep slope of forest" ppt
... effects of slope and traffic intensity on soil compaction, rutting and forest floor removal was evaluated on a skid trail in the natural forest of north of Iran. Combination of two levels of slope ... standards for sustainable forest produc-tivity in the United States. In: e Contribution of soil sci-ence to the development of and implementation of criteria and indicators of sustainable sorest ... following the first traffic on the skid trail area was approximately 60% in both slope classes. In ground-based skidding some of the trees along the skid trail were cut during the construction of skid...
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Báo cáo lâm nghiệp: "Linking intra-tree-ring wood density variations and tracheid anatomical characteristics in Douglas fir (Pseudotsuga menziesii (Mirb.) Franco)" pot
... 1. The ratio between CWP and MMDadecreasedwithin the first half of a tree-ring; then it reached a plateau, and remained constant in the second half of the tree-ring (Fig. 2B).Correlations ... model of xylem growth [9] simulates a diminution of wood density at the beginning of a ring, and explains it by a temporary short-age in substrate for cell-wall construction.5. CONCLUSIONWood ... characteristics independently, in order toevaluate their relative in uences on wood density. For the firstset of simulations, all the variables in the model were fixedto values they take at the beginning of...
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Báo cáo lâm nghiệp: "Influence of marine salts on the localization and accumulation of surfactant in the needles of Pinus halepensis Mill" ppsx
... penetration and accumulation of organic chemicals in plant cuticles.Rev Environ Contam Toxicol 108, 1-70Original articleInfluence of marine salts on the localization and accumulation ... windduring storms and damage the coastalvegetation. LABS accumulation in the needles of P halepensis Mill needs to beconfirmed on pines growing in natural con-ditions, ... In this paper,we report the influence of marine salt on the leaf uptake of LABS in Pinus halepensis Mill. To mimic the conditions found duringstorms, trees were exposed...
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Báo cáo lâm nghiệp: " Influence of temperatures and precipitation on radial increment of Orlické hory Mts. spruce stands at altitudes over 800 m a.s.l" ppt
... and March of the year in question. e standard tree-ring chronology shows an obvious decrease in radial increments starting at the beginning of the 1970s and ending at the end of the 1980s. ... the year in question (Fig. 3).e standard regional tree-ring chronology shows a decrease in the radial increments starting at the beginning of the 1970s and ending at the end of the 1980s ... air pollution load the climatic conditions are the factor determining the resulting effect of the synergic in uence of the stressors on the stands.Keywords: Orlické hory Mts.; tree-ring analysis;...
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Báo cáo lâm nghiệp: " Influence of stand density, thinning and elevated CO2 on stem wood density of spruce" pot
... and maximum density in response to elevated CO2 Supported by the Ministry of Environment of the Czech Republic, Project No. VaV/640/18/03, the Ministry of Education, Youth and Sports of the ... and non-stressed conditions. In: JACOBY G.C., HORNBECK J.W. (eds.), Proceedings of the Inter-national Symposium on Ecological Aspects of Tree-Ring Analysis. Springfield, National Technical Information ... Variations in environmental conditions induce unequal response of wood density to elevated CO2. For example, at ambient temperatures, approxi-mately 60% increase of the air’s CO2 concentration...
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Báo cáo lâm nghiệp: "Influence of pulverized limestone and amphibolite mixture on the growth performance of Alnus incana (L.) Moench plantation on an acidified mountain site" potx
... decrease in height during the winter period through Table 6. Proportion values of nutrition elements to N (=100%) in dry mass of leaves (the 1st section of the table) and basic cation ratios in the ... during the conversion of blue spruce stands even under environmentally highly stressing conditions, (2) to assess the foliar nutrient status of the alder as a precondition of positive in uence ... under the harsh environmental conditions of the 7th and 8th forest altitudinal zones. No growth stagnation as a result of transplanting shock was observed in the initial years after planting....
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Báo cáo lâm nghiệp: " Influence of a planting hole application of dolomitic limestone powder and basalt grit on the growth of Carpathian birch (Betula carpatica W. et K.) and soil chemistry in the air-polluted Jizerské hory Mts." pptx
... content by raising the soil reaction (pH) and promoting mineralization of SOM, on the other hand this treatment adds Ca cations into soil and thus increases the probability of the formation ... consequence of silicate weathering. In the 0–10 cm horizon of the limestone variant, the increased content of exchangeable Ca and Mg is in accordance with expectations and with findings of ... also the K cations, in contrast to liming, surely participated in it.e increased CEC as a result of liming and also basalt grit application is in line with the expectations and findings of other...
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Báo cáo lâm nghiệp: "Influence of light and competition on crown and shoot morphological parameters of Norway spruce and silver fir saplings" doc
... 1-min inter-vals, from 7.00 to 17.00, on 10 different days selected at the beginning,middle and end of the growing season on both clear and overcast skyconditions in order to increase their ... of the lateral shoots at the last node) is a relatively good and simple indicator of the light conditions in which saplings are growing. These informations may be useful in order to promote and ... light in the understory and of competition between saplings. An example of the difficulty to understand the effects of sub-tle differences in crown and shoot morphology on the responseto light intensity...
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Báo cáo lâm nghiệp: " Influence of environmental conditions on radial patterns of sap flux density of a 70-year Fagus crenata trees in the Naeba Mountains, Japan" ppsx
... Considering that the theoreticalresponse with depth described by the Weibull function permitsa changing position of the peak value in flow, the relationship in flow between two sensors in the ... continuouslythroughout the growing season using the heat dissipation methodaccording to Granier [4, 5]. Heating of the upper probe was carriedout along a 20 mm long winding in all cases. The ... using Weibull function under the three different sets of environmental conditions (the same environmentalcondition as Fig. 4) The radial pattern variation of SFDday (as shown in D-F) was converted...
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Báo cáo lâm nghiệp: "Influence of flooding on growth, nitrogen availability in soil, and nitrate reduction of young oak seedlings (Quercus robur L.)" docx
... in flooded seedlings. In fact, Dickson [10] underlined the involve-ment of cytokinin in bud break initiation of Quercus rubraseedlings. Initiation of new roots in stressed seedlings began26 ... partitioning was impaired byflooding especially in leaves. Further experiments will be help-ful to clarify (i) the role of ammonium assimilation pathway in maintaining amino acid content in root ... for-N. At day 34, the level of -N concentration in flooded soil, was 7-fold and 50-fold lower, in the top and in the bottom of pots respectively, than in controls. After drainage,-N content displayed...
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