نتایج جستجو برای: tree regeneration

تعداد نتایج: 229803  

2012
Paul P. Kormanik Shi-Jean S. Sung Stanley J. Zarnoch Thomas Tibbs

Northern red oak (Quercus rubra) and white oak (Quercus alba) are important components of high-quality mes1c s1tes and are essential as lumber species and hard mast producers. Regeneration of these species has been difficult, and their absence in newly regenerated stands is a major concern of foresters and wildlife biologists Several 1mportant biolog1cal tra1ts of oak species may contribute to ...

Journal: :Borneo Journal of Resource Science and Technology 2021

Natural regeneration is an indicator of a healthy forest, hence, understanding the influence site factors on natural significant concern for ecologists. This work aimed to assess impact tree at Khadimnagar National Park (KNP). Biotic (tree density, species richness, and basal area), physical (elevation, canopy openness), soil properties (bulk moisture content, pH, organic matter, sand, silt, cl...

پایان نامه :وزارت بهداشت، درمان و آموزش پزشکی - دانشگاه علوم پزشکی و خدمات بهداشتی درمانی مشهد - دانشکده دندانپزشکی 1394

جایگزینی دندان های از دست رفته به وسیله ایمپلنت دندانی به فراوانی انجام میشود. برای اینکه ایمپلنت به طور بهینه جایگزین شود باید در استخوان ایده ال جایگذاری شود که البته این نقایص قابل ترمیم هستند، یکی از این روشها guided bone regeneration است.

2014
Franziska Peter Dana G. Berens Nina Farwig

Forest fragmentation and plant diversity have been shown to play a crucial role for herbivorous insects (herbivores, hereafter). In turn, herbivory-induced leaf area loss is known to have direct implications for plant growth and reproduction as well as long-term consequences for ecosystem functioning and forest regeneration. So far, previous studies determined diverging responses of herbivores ...

2004
T. Dennis Jos T. PUTHUR

An efficient regeneration system was developed for Kigelia pinnata L., a multipurpose tree belonging to the family Bignoniaceae. The nodal segments were cultured in vitro, and the optimum concentrations of plant growth regulators for callus induction were determined. The friable organogenic calli were derived from the basal cut end of the nodal segments. The highest yield of morphogenic callus ...

Journal: :NeoBiota 2021

Identifying emerging invasive species is a priority to implement early preventive and control actions. In terms of the number tree species, forestry represents second largest pathway introduction, with an debt likely existing for alien conifers in Europe. 1900s, network arboreta was established southern Belgium assess wood production potential prospective conifer broadleaved species. Here, we u...

2006

Question: How do interactions between rocky landscape features and fire regime influence vegetation dynamics? Location: Continental Eastern USA. Methods: We measured vegetation, disturbance and site characteristics in 40 pairs of rocky and non-rocky plots: 20 in recently burned stands, and 20 in stands with no evidence of recent fire (‘unburned’ stands). Two-way analysis of variance (ANOVA) was...

2005
Douglas D. Piirto Sauli Valkonen

The sustainability of indigenous Monterey pine (Pinus radiata D. Don) at Año Nuevo stands in the central coast of California was examined. The foremost management objective in these stands is to establish and maintain stand structures that ensure a sustainable presence of the species in terms of uneven-aged management. The major threats are the proliferation of shadetolerant tree species and th...

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