نتایج جستجو برای: fraxinus excelsior l
تعداد نتایج: 618912 فیلتر نتایج به سال:
The influence of physical and chemical properties of 20 species of imported wood on degradation of the wood by termites under field conditions was studied. The wood species studied were: Sycamore maple, Acer pseudoplatanus L. (Sapindales: Sapindaceae) (from two countries), Camphor, Dryobalanops aromatic C.F.Gaertner (Malvales: Dipterocarpaceae), Beech, Fagus grandifolia Ehrhart (Fagales: Fagace...
Fraxinus excelsior L. is threatened by a variety of environmental factors causing decline the species. The most important biotic negatively affecting condition F. population are fungi such as pathogen Hymenoscyphus fraxineus. Abiotic with potentially harmful effect to accumulation heavy metals and salinity in soils. Thus, aim this study was investigate impact selected abiotic stress determine w...
در چند سال اخیر سرمای دیررس بهاره روی نهالهای گونه ون (Fraxinus excelsior L.) در نهالستانهای کوهستانی خسارت زیادی وارد کرده است. این تحقیق با هدف کاهش خسارت سرمای دیررس بهاره روی نهالهای گونه ون در نهالستان درزیکلای شرکت چوب فریم واقع در کیلومتر 17 جنوب شرقی شهر پلسفید اجرا شد. در این تحقیق دو تیمار پوشش نهال (در دو سطح شامل کرتهای دارای پوشش با نایلون سفید در هنگام سرما و کرتهای بدون پو...
We investigated soluble carbohydrate transport in trees that differed in their phloem loading strategies in order to better understand the transport of photosynthetic products into the roots and the rhizosphere as this knowledge is needed to better understand the respiratory processes in the rhizosphere. We compared beech, which is suggested to use mainly passive loading of transport sugars alo...
The aim of this study was to investigate soil respiration in the plantation stands of Acer velutinum, Quercus castaneifolia, Fraxinus excelsior and Pinus brutia and to compare them with the natural stands in Sari educational-research forest of Darabkola. In order to measure physical and chemical properties of soil in each stand, 10 points were selected systematic randomly and samples were taken...
British temperate broadleaf woodlands have been widely fragmented since the advent of modern agriculture and development. As a result, a higher proportion of woodland area is now subject to edge effects which can alter the efficiency of ecosystem functions. These areas are particularly sensitive to drought. Decomposition of detritus and nutrient cycling are driven by soil microbe and fauna coac...
Linden, ash, and pine are ubiquitous ornamental trees due to their ability adapt the urban environment. They have been key species in green infrastructure from more than hundreds of years play an active role maintaining ecosystem services. The urbanization rate recent decades, combined with global climate change, has led dynamic changes environmental factors which pose new challenges vegetation...
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