نتایج جستجو برای: beech (fagus orientalis lipsky)
تعداد نتایج: 7659 فیلتر نتایج به سال:
Development of the Dead Trees Structural Legacy in Dynamics Process Pure Beech (Fagus orientalis Lipsky) Stands (Case study: Gorazbon District Kheyrud Forest)
the non-destructive meyer method was evaluated to determine the bark volume of beech (fagus orientalis lipsky) stands in north of iran. the sample size was 185 standing trees collected from 4 geographical aspects (north, south, west and east) aspects. the constant k values and bark thickness (2e mm) of 185 standing trees were used to calculate the bark volume by the meyer method. in this study,...
This study was executed to determine the plant species of herbaceous cover in a skid road subjected to soil compaction due to timber skidding in a beech (Fagus orientalis Lipsky.) stand. Our previous studies have shown that ground based timber skidding destroys the soils extremely, and degradations on ecosystem because of the timber skidding limit recovery and growth of plant cover on skid road...
Resource sustainability requires a thorough understanding of the influence of forest management programs on the conservation of genetic diversity in tree populations. To observe how differences in forest management affect the genetic structure of Fagus orientalis Lipsky (oriental beech), we evaluated thirteen beech sites across Hyrcanian forests, based on six microsatellite loci. Significant di...
In this study, the differences in terms of fiber morphology and chemical composition between heartwood sapwood red gum (Eucalyptus camaldulensis Dehnh.), black willow (Salix nigra Marsh.), oriental beech (Fagus orientalis Lipsky) were investigated. The results showed that samples had shorter fibers lower slenderness ratios than those samples. vessel element length sampled tree species statistic...
resource sustainability requires a thorough understanding of the influence of forest management programs on the conservation of genetic diversity in tree populations. to observe how differences in forest management affect the genetic structure of fagus orientalis lipsky (oriental beech), we evaluated thirteen beech sites across hyrcanian forests, based on six microsatellite loci. significant di...
Moisture content (MC) is one of the most important factors that can affect many physical and mechanical properties of wood and veneers. MC strongly affects the final strength and durability of joints, development of surface checks in the wood and dimensional stability of the bonded assembly. In this study, plywood panels made from Alnus glutinosa (Alder), Fagus orientalis (Beech) and Picea orie...
this study aims at analyzing spatial pattern and associations of fagus oriantalis lipsky in different vertical classes in intact beech forests. data collection was done in 25 ha plot in gorazbon district of educational and experimental forests of university of tehran. species and dbh of all trees with dbh > 7.5 cm were recorded. the location of each tree was determined using azimuth and distanc...
This study is carried out in order to increase the retention performance of synthetic boron compounds. For this purpose, test samples prepared from Scots pine (Pinus sylvestris Lipsky), European oak (Quercus petraea Liebl.) and Oriental Beech (Fagus orientalis Lipsky) woods impregnated with dipping method accordance principles TS 6193 EN 84 by using 12 different composisiton Developed Impregnat...
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