نتایج جستجو برای: beech fagus orientalis lipsky
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the aim of this study was to evaluate sound and decayed wood of iranianbeech (fagus orientalis) with a nondestructive stress wave method. wood samples,with dimensions of 9 by 19 by 200 mm were decayed in laboratory soil-bed tests,based on european pre-standard env-807. the decay was evaluated by measuringbending dynamic modulus of elasticity (moed) and longitudinal dynamicmodulus of elasticity ...
The present study aimed to detect sensitivity of beech trees (Fagus sylvatica L.) to meteorological parameters and air pollution by acidifying species as well as to surface ozone outside their north-eastern distribution range. Data set since 1981 of Preila EMEP station enabled to establish that hot Summers, cold dormant, and dry and cold first-half of vegetation periods resulted in beech tree g...
Bu çalışmada, kütük yetiştiriciliğinde misel ekim zamanı ve ağaç türlerinin shiitake mantarının (Lentinula edodes (Berkeley) Pegler-meşe mantarı) verim kalitesi üzerine etkileri araştırılmıştır. Kayın (Fagus orientalis Lipsky), kızılağaç (Alnus glutinosa subsp. barbata C.A. Mey.) Yalt.) meşe (Quercus macranthera syspirensis (K. Koch) Menitsky) olmak üzere 3 farklı türüne ait kütükler kullanılmı...
We introduce in this paper a new interacting particle system intended to model an example of ecological succession involving two species: Pteridium aquilinum L. commonly called bracken and Fagus sylvatica L. or european beech. The species both compete over vacant sites, assimilated to windfall, according to fundamentally different evolutionary strategies. Our main objective is to exhibit phase ...
Forest type maps play a significant role in sustainable forest management. For many years aerial photos and satellite data were a primary data source supporting forest type mapping. Recent developments in remote sensing provide opportunities to further enhance forest type maps by introducing variations of spectral, biochemical and biophysical properties at various scales. A structural sampling ...
In the Retezat Mountains concentrations of O3, NO2 and SO2 in summer season 2000-2002 were low and below toxicity levels for forest trees. While NH3 concentrations were low in 2000, the 2001 and 2002 concentrations were elevated indicating possibility for increased N deposition to forest stands. More than 90% of the rain events were acidic with pH values <5.5, contributing to increased acidity ...
هدف از انجام این تحقیق، تعیین مناسب ترین محیط، سطح حرارتی و رطوبتی برای افزایش قوه نامیه بذر راش شرقی (fagus orientalis lipsky)، جمع آوری شده از ارتفاعات مختلف جنگل واز (حوزه شهرستان نور)، بوده است. در آزمایش 1 از پیش تیمار آب اکسیژنه برای افزایش میزان و سرعت جوانه زنی استفاده گردید. در آزمایش 2 بذور با رطوبت اولیه در 4 محیط آزمایشگاه (با دمای متغیر) ، یخچال (c 4-2 ) ، جایخی (c 0) و فریزر (c 8-...
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