نتایج جستجو برای: alnus subcordata l
تعداد نتایج: 618934 فیلتر نتایج به سال:
The effect of management was studied on the variation of some crucial forest stand features in the district nine of Shafaroud Gilan during a 20-year period. The survey was conducted in the regeneration affectation on 1985 and 2007. The measurement were done with a similar design (systematic randomized sampling in a 150×200m grid and 0.1 ha circular field plots) in 1985 and 2007, respectively. A...
Belowground processes are rarely considered in comparison studies of native verses invasive species. We examined relationships between belowground fine root production and lifespan, leaf phenology, and seasonal nitrogen dynamics of Lonicera japonica (non-native) versus L. sempervirens (native) and Frangula alnus (non-native) versus Rhamnus alnifolia (native), over time. First and second order f...
Ecological restoration with a multispecies and multifunctional approach can accelerate the re-establishment of numerous ecosystem services. The challenges land that is degraded, damaged, or destroyed post-mining are low productivity soil high potential for contaminants. Herein, we evaluated to strategy through mixture woody herbaceous species, microsymbiont biochar amendments, plant spacing. ex...
This article contains a short introduction to the R package StepSignalMargiLike for estimating change-points in stepwise signals. In the first section, we will outline the theoretical framework of the marginal Likelihood estimator as formulated in Du, Kao and Kou (2015). The second section contains a brief introduction of the R-implementation of this method as seen in package StepSignalMargiLik...
The aim of this study was to develop an optimal sustainable forest plantation based on goal programming and Analytic Hierarchy Process (AHP) methods. This study was carried out in Guilan province, north of Iran. First of all, the ecological capability of the study area for plantation establishment/maintenance was evaluated based on multi-factor method and specific ecological Makhdoum Model by ...
پژوهش حاضر با هدف بررسی اثر آمیختگی در جنگلکاریهای خالص و آمیخته با گونههای صنوبر دلتوئیدس (Populus deltoids) و توسکای ییلاقی (Alnus subcordata) بر مشخصههای کمّی توده و خواص خاک منطقة چمستان انجام گرفت. آزمایش در قالب طرح آزمایشی بلوکهای کامل تصادفی با پنج تیمار آمیختگی شامل 1. صنوبر خالص (100 درصد)، 2. صنوبر 67 درصد: توسکا 33 درصد، 3. صنوبر 50 درصد: توسکا 50 درصد، 4. صنوبر 33 درصد: توسکا 6...
Distribution and growth of plant species is affected by many factors including abiotic (topography, altitude and soil) and biotic (root symbiosis) factors. In light of global warming, recent findings advocate microhabitats and micro-conditions of the root zone and canopy ambiance as determining factors in sustaining of plant populations. Although, occurrence of ectomycorrhizal (ECM) and non...
Thermal conditions at the beginning of the year determine the timing of pollen seasons of early flowering trees. The aims of this study were to quantify the relationship between the tree pollen season start dates and the thermal conditions just before the beginning of the season and to construct models predicting the start of the pollen season in a given year. The study was performed in Krakow ...
In order to evaluate the effects of forest road on vegetation and some soil properties was selected a road with the length of 400 m. Type and number of regeneration species of trees and shrubs in plot area of 100 m2 and type and cover percentage of herbaceous species using minimal area method were recorded in plot area of 64 m2 and herbaceous species was classified into two groups using Two-W...
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