جستجوی مقالات مرتبط با کلیدواژه « راش » در نشریات گروه « جنگلداری »

The beech tree has the ability to produce shoots and form a coppice stands under specific natural climatic and environmental conditions or under unusual circumstances caused by human interference. The current research aims to compare the structural characteristics of coppice and standard stands of beech in the Hyrcanian forests in the Chetan area in Nowshahr. The diameter at breast height of all trees was measured using the full calipering method to determine the stocking volume. Half-hectare sample plots were established using the distance-azimuth method to study the spatial structure. The standing and log stocking volumes were also determined. According to the results, the number of live and dead trees in the coppice stand was 174 and 9.7 per hectare, respectively, and their volume was 146.2 and 3.6 m³/ha, respectively. In the standard stand, the number of live and dead beech individuals was 145 and 11 per hectare, respectively, while their volume was 147.5 and 12.1 m³/ha, respectively. About 55% of the standing dead trees in the coppice stand and 35% of the standing dead trees and 42% of the fallen dead trees in the standard stand were primarily in the first decay degree. The highest number of individuals in a beech coppice group included four, which is 17%. Groups of five individuals and two individuals also accounted for 16.9% and 16.5%, respectively. Spatial structure indices of beech coppice, including the Pielou segregation, Clark and Evans, Mingling, DBH differentiation, DBH dominance, and uniform angle, indicate species continuity, clustering, severe dominance of beech species, moderate differences, small size dominance, and clump distribution, respectively. Traditional uses of forests have influenced the structural characteristics of beech stands. Therefore, it is suggested that these and other similar stands be protected as a forest reserve to ensure the development of these habitats towards a more favorable state and the stability of the landscape in these areas.

With sufficient knowledge regarding the presence of fungi and the significance of biodiversity, the forest's management objectives can achieve their sustainability goals. Therefore, in order to properly manage the forest, it is necessary to establish indicators that provide adequate information on biodiversity and monitor changes resulting from management activities. This study aims to identify various macroscopic fungi and investigate their biodiversity in their habitat, i.e., deadwood.

Fifteen specimens of deadwood fungi were randomly selected in Darabkola forest. All macroscopic fungi were numbered and collected, then transferred to the mycology laboratory for identification. The biodiversity of the fungi was calculated using Shannon-Wiener diversity index, Simpson diversity index, richness index, and uniformity index with PAST software

The obtained results revealed that there were 37 species of macroscopic fungi belonging to 27 genera and 16 families. Trametes versicolor, Daldinia concentrica, Trichaptum biforme, and Fomes fomentarius were the most abundant, while Hericium coralloides, Ganoderma resinaceum, Ganoderma adspersum, and Trametes trogii were the least abundant species. Additionally, the families Polyporaceae, Xylariaceae, Ganodermataceae, Pleurotaceae, and Schizophyllaceae were the most abundant, whereas Pezizaceae and Hericiaceae were the least abundant. Most fungi were present in the final stages of decomposition. The results indicated that the mean diversity index for Shannon-Wiener species diversity was 3.24, Simpson species diversity index was 0.95, Margalef's richness index was 6.11, Menhinick's index was 1.95, and uniformity was 0.69. The analysis of the Shannon-Wiener diversity index showed that Trichaptum biforme and Trametes versicolor had a higher diversity value with a score of 1.46.

The results of this study indicate that for the management of fallen deadwood habitats with the aim of increasing the biodiversity of fungi, it is recommended to preserve these fallen deadwood areas within the forest. This preservation would contribute to the revitalization and completion of the ecosystem cycle.

The consequences of global climate change that Iran and other countries are now facing are the pressures and stresses that have been placed on terrestrial ecosystems, especially forests. This is a serious threat to the extinction of many species. Evaluation of plant functional traits changes along height from sea level gradient is very useful in order to understand the adaptation of communities and their response to the environment in climate change. The purpose of this study was to understand the trend of changes in leaf morphological traits and also to investigate the segregation of populations of three important broadleaf species of Hyrcanian forests in the altitude gradient.

For this purpose, five populations at altitudes of 300, 600, 1200, 900 and 1500 m above sea level in the forests of Neka region were selected according to the natural distribution of the studied species. Leaf sampling was performed in four directions and in the middle of tree canopies and seven leaf morphological traits were measured and calculated. Data were processed using analysis of variance, Duncan multiple comparisons and diagnostic analysis.

The results of analysis of variance showed that all leaf traits of all three species have significant differences between different classes of altitude. The trend of changes in the traits of the three species in the altitude gradient was different. Diagnostic analysis of traits in altitude classes performed grouping of the individuals with high accuracy for all three species. The results of this study showed that among the leaf morphological traits of all three species of oak, hornbeam and beech in response to altitude, the traits of leaf area, perimeter, length and width are considered as the best traits.

In general, considering the trend of changes in leaf morphological traits of species in the altitude gradient based on the nature of the species in the study area and good detection of phenotypic differences of populations by Diagnostic analysis concludes that the forces of natural selection in order to adapt and develop the populations of these three species in the altitude gradient of this region, have a good effect on leaf characteristics and have caused the separation of populations. Also, the leaf area trait was introduced as the most effective applied trait and the difference in height of 300 meters was proposed as hypothetical boundaries of the separation of altitude provenance of all three species. Therefore, with the help of the findings of this study, the stability of separate populations of all three species against some consequences of climate change can be evaluated and also in choosing the optimal forest management method to protect the genetic resources of species and improving risk prevention management can be used.

Determining and estimating the tree diameter growth and basal area growth of beech are very important in forest management and planning. Due to, the beech trees is one of the most valuable species in Hyrcanian forests, so the aim of this study is determine and modeling the tree diameter growth and basal area growth of the beech tree in forestry plans in Golestan province.

This study was conducted in four forestry plans Vatana, Kordkoy, Shamoshak and Shast-Kalate located in Golestan province. In the study area, 19 beech trees were selected from healthy trees with criteria such as no twisting of the trunk and no wounding of the trunk at a similar altitude from among the healthy stands. A disk (10 cm-thick) at breast height was selected. The maximum, minimum and mean age of the trees in the study area are 243 years (2016-1773), 99 and 142 years, respectively. After preparing the samples, the width of the annual rings of trees was measured using a LINTAB with 0.01 mm accuracy. Then, the average diameter growth and annual basal area growth of trees were determined and the relationship between diameter at breast height and growth diameter and basal area growth was evaluated using four models: Hyperbolic, Heat capacity, Modified power and Richard.

The results showed that with increasing age of beech trees, the diameter growth increased and reached its peak in 1955, then it started a downward trend. The results also showed that with increasing tree age, annual basal area growth of the tree also increases, in compare to diameter growth, annual basal area growth reaches a maximum in 1990 and then takes a downward trend. The results showed that The diameter growth and annual basal area were 3.93 mm and 17.52 cm2, respectively. The results of modeling also showed that the heat capacity model, compared to other models, could better explain the diameter and basal area with a coefficient of determination of R2 = 0.37 and R2 = 0.69, respectively. The results of uncertainty analysis also showed that the real average of diameter growth and basal area growth characteristics is in the range of 95% confidence intervals, which shows the appropriate and reliable performance of the model.

According to the results, it can be concluded that diameter growth and annual basal area were 3.93 mm and 17.52 cm2, respectively and DBH as an dependent variable explains 37% and 69% of changes in diameter growth and annual basal area.

The aim of this study was to develop the Mixed-effects model and compare it with nonlinear models for estimating beech (Fagus Orientalis Lipsky) and hornbeam (Carpinus betulus L.) heights in the Shast-kalateh forests (district 1 and 2) of Gorgan. We applied a systematic sampling method to collect the field data within a 150×200 m network (308 circular plots) and in each plot, tree species were identified and height and diameter at breast height (DBH) of all trees were measured. Model fitting was done in two stages: Fixed-effect approach was used in the first stage wherein candidate models where height (dependent variable) and DBH (independent variable). These were refitted in the second stage using a mixed-effect approach. The adjusted coefficient of determination and root mean square error, were used to assess the models. The results of fitting nonlinear models showed that for the beech, Curtis and Naslund models had the highest coefficient of determination of 0.76 and the lowest root mean square error of 3.35 and 3.40, respectively. For hornbeam, Naslund and Michailoff models with the coefficient of determination of 0.40 and the root mean square error of 2.95 and 2.90 were selected as the best models. The results of nonlinear mixed effects model showed that the R2 for beech and hornbeam species increased by 10% and 30% respectively, and the RMSE improved about 0.65 for beech and 0.6 for hornbeam.

Canopy gaps in different sizes have been created by the implementation of different silvicultural practices such as single-tree selection in beech forest stands in Hyrcanian forests. Investigating the effects of forest gaps on the characteristics of trees and soil in the forest ecosystem can be very helpful in planning silvicultural operations. Shade-tolerant beech trees in this ecosystem are of ecological and economic importance and knowing the reaction of such a valuable tree can be effective for forest management and selection of forestry methods.Therefore, the purpose of the present study was to determine the correlation between structure, fine roots properties of beech trees and soil biology(MBC,MBN and MBP) in different gaps (n = 15) created by single-tree selection system with competition index in beech forest stands in Mazandaran-Sari province.

In the beech forest stand, 15 forest gaps were identified including three classes of small (80-130), medium (175-131) and large (176-300m2) size and five replicates were selected for each level. In four cardinal positions of each gap, beech trees were selected and their height, diameter at breast height, crown diameter, area, volume and fine roots as well as competition index were measured.

Pearson correlation coefficients showed a significant positive correlation between competition index with height, DBH, crown diameter, crown area and length of Bole and also negative correlation with height to diameter ratio (H/D) of beech trees. There was a significant negative correlation between competition index and microbial biomass nitrogen and a significant positive correlation with microbial biomass carbon to microbial biomass nitrogen ratio (MBC/MBN). With increasing density, specific root length and specific area of fine roots, the values of competition index increased. There was a significant correlation between some structural characteristics of beech trees with fine root characteristics at the edge of gaps. Correlation coefficients between fine root characteristics of beech trees show significant correlation between some variables.

In general, the results of the study showed that forest management through the application of single-tree selection system and the formation of canopy gaps in beech stand has influenced the structural characteristics and fine roots of beech trees six years after the creation of gaps.

Studying and evaluating the canopy gaps structure provides an accurate understanding of the process of forest stands dynamics as well as natural disturbances that play an important role in the future management of the forest ecosystem. The purpose of this study was to investigate the relationship between gaps and quantitative and qualitative characteristics of regeneration in the natural forest of Haftkhal in Mazandaran province.

For this purpose, gaps in the area were identified and recorded. Then the characteristics of collar diameter, height, seedling abundance in growth stages were recorded. According to the smallest and largest gap area, gaps divided into three classes of small (less than 300 m2), medium (300 to 600 m2), and large (more than 600 m2).

The results showed that gaps area was 3.65% of the total study area. In terms of area, 85% of the gaps were in small and medium-sized classes, which could indicate small-scale disturbances. The relationship between the gap area and perimeter and the study of Miller's elongation index showed more elliptical shape in small gaps to a circular shape in large gaps. The value of the Miller elongation index in small, medium and large gap area classes was 0.42, 0.59 and 0.86, respectively. The results showed that 85% of the regenerations in the gaps were related to the beech species. The highest frequency of regenerations was in the pole stage with a diameter of less than 5 cm and a height of 4 to 8 meters, which is an essential factor in starting the competition for light. Comparisons also showed that the frequency, diameter growth, and height growth of regenerations decreased significantly with increasing canopy gap area due to ecological needs, especially shade-tolerant growth of beech species, which provided by small canopy gap area.

Finally, the results indicate that pathways smaller than 600 m2 have more suitable conditions and in forest management, the creation of gaps larger than 600 m2 should be avoided as much as possible.

Dead trees are one of the most important structural features in natural stands that knowledge of the processes associated with them is essential in understanding the evolution and development of forest stands. The main purpose of this study was to estimate the quantitative and qualitative characteristics in the natural beech forests during the stage of growing-up volume in the Kheyrood forest of Iran. For this purpose, three one-hectare sample plots with structural features of growing-up volume stage were selected. In each plot, species, diameter, length, shape, and degree of decay of all dead trees were measured. The proportion of snags was 32.8%, while 67.2% of dead trees were recorded as log. The highest and lowest number of deadwoods belonged to beech with 86% and alder with 6%, respectively. The results showed that 73.8% of the total number of measured deadwoods related to primary decay degrees and 26.2% were in the advanced degrees of decay. The highest frequency of deadwoods in diameter classes in the study stands was measured in low, very thick, medium and thick diameter classes, respectively. The highest and lowest mortality rates in the diameter classes were calculated in the low- and thick-diameter classes, respectively. The average volumes of deadwoods in different diameter classes were significantly different. In general, in order to identify changes in the stand structure over time and to investigate the dynamics of deadwood in the growing-up volume stage, it is suggested that the stand analyzed here be monitored in the future.

Evaluation of management practices in forests is necessary to determine the appropriate method of sustainable management. Therefore, some quantitative parameters of beech forests, harvested sequentially as shelterwood system and single-selection method were evaluated and compared to a controle compatrment. The control and harvested compartments were selected in Muzisay forest plan in Neka. The measurement was done within 0.1 ha sampe plots in 150×200m gridin 2019. Some quantitative characteristics were measured including the species type, DBH of all trees greater  than 12.5 cm, and the height of eight trees in each sample plot. The results showed that from 2001 to 2019, the frequency of beech in exploited plots increased from 81.51% to 96.2%. The abundance of hornbeam decreased from 14.41% to 2.9%. In control compartment, the beech frequency increased from 89.9 to 93.7% too. The average number of trees in the control plot was gradually declined from 275.5 to 245.83.  In contrast, it increased from 259.23 to 315.81 in managed plots. The opposite was seen regarding to the stand volume. In the managed compartments, the stand volume was declined from 481.47 silves to 426.31 silves. In contrast, it raised from 454.4 to 528.27 silves in control compartment. Both areas had an nearly regular age structure and near to normal volume structure. There were no significant differences between control and harvested compartments in light of total height, average number tree, and volume h-1. The exploitation of these forests by the shelterwood and the single selection method did not cause any destruction.

Biomass measurement is important in terms of ecological and economical evaluation of the structure and conditions of habitat and can provide an estimate for carbon sequestration in different organs of tree. In order to assess the amount of biomass in harvested and unmanaged Beech stands, two compartments (511 and 514) of Safaroodchr('39')s forest  were selected. A plot of 6.25 hectare from each compartment were determined and diameter at breast, height, diameter and height of crown were measured under full inventory. The amount of biomass for tagged trees based on  Direct biomass measurement and total stands were utilized using allometric equation. In the harvested compartment, 15 trees from all tagged trees were selected, limbing and Volumes were determined. Three discs from each trunk were selected and cut. Concerning the branches, one stere from each tree was specified. In order to determine the dry weight (biomass), discs and branches were kept in a kiln for 48 hours at tempreture of 80°C and then weighed. The results of the study revealed that the amount of biomass storage in unmanaged and harvested stand was estimated as 222.18 and 311.58 tons per hectare, respectively. The results of t-test indicated significant difference (α= 5) between the mean of trunk and branches of biomass storage  in total stand and diameter classes of these two compartments. Effect of management intervention on harvesting stand, specifically harvesting of Thick tree, has resulted in decreasing the average diameter and height of the stands and volume and biomass in the  managed area.

Process of natural regeneration in uneven-aged stands is one of basic issues for sustainability in close to nature silviculture approach. The present research started form 2009 in four intact oriental beech stands of the Hyrcanian forests. Twelve, one ha sample plots have been established in three development stages containing five micro sample plots of 4 m2. Three gap sizes (small, medium and large) with five micro sample plots of 4 m2 have been selected within the development stages and characteristics of saplings have been studied. Relative light intensity (RLI) and leaf area index (LAI) have been studied as well. Results showed that the stands in the initial and optimal stages were pure, while decay stage was mixed. The least RLI was observed in the optimal stage and small sized gap while the highest amount of RLI was in the decay stage and large gap. The lowest amount of LAI was calculated in the optimal stage and small gap size. The maximum mean height increment was measured in the initial stage and small gap, maximum length of uppermost internode and annual shoot in optimal stage and large gap and the widest crown width was calculated in the initial stage and small gap. The proportion of saplings with favored quality was highest in the optimal stage and medium gap size while the highest proportion of twig and broom shaped saplings was observed in the large gaps. Overall, small and large gaps can negatively affect the saplings, whereas medium sized gap creates better condition for saplings.

The study of the litter quality and soil enzymes activities are used as indicators for soil quality and soil health assessment. The aim of this research was to investigate the effect of different vegetation types of Vaz forest of Noor-Mazandaran Province (i.e. Fageto-Carpinetum, Fageto-Aceretum, Fageto-Quercetum and Fagetum) on litter quality and activity of some of the most important soil enzymes. For this, eight samples of litter and soil (0 to 15 cm) were collected within the forest types in growing season. The ANOVA of litter, soil physio-chemical and enzymes activities rate indicate a significant statistical difference among forest types. The highest amounts of litter thickness (15.15 cm) and C/N ratio (79.08) were allocated to the Fagetum type and the least amounts of litter thickness (8.09 cm) and C/N ratio (42.15) were found under Fageto-Carpinetum type. The results showed that the highest activity rate of urease (23.14 µg NH4+–N g−1 2 h−1), acid phosphatase (521.12 µg PNP g−1 h−1), arile sulfatase (129 µg PNP g−1 h−1) and invertase (210.37 µg Glucose g−1 3 h−1) were significantly observed under Fageto-Carpinetum forest type. Based on findings, the soil of Fageto-Carpinetum forest type has better quality compared to other studied types. The results of this research can be helpful for prioritizing of forest stands based on plant residual and soil quality.

In this research, modeling tree height distributions of beech in natural forests of Masal that is located in Guilan province; was investigated. Inventory was carried out using systematic random sampling with network dimensions of 150×200 m and area sample plot of 0.1 ha. DBH and heights of 630 beech trees in 30 sample plots were measured. Beta, Gamma, Normal, Log-normal and Weibull probability distribution function were surveyed. Characteristics of distribution functions were estimated by using of maximum likelihood method. Actual probability and probability which derived from functions was compared using Kolmogorov-Smirnov and Anderson-Darling tests. Results of Kolmogorov-Smirnov test showed that only Beta probability distribution function was suitable for modeling height distribution of beech; while results of Anderson-Darling tests demonstrated probability distribution functions of Beta, Normal, and Weibull were fitted to the height distribution of trees. Therefore probability distribution function of Beta was selected for modeling height distribution of beech.

In order to comparing the regeneration and diversity in natural and created gaps, all of the gaps in two compartments in Asalem forests were identified and divided into three categories: small gaps (2), medium gaps (200-500 m2), and large gaps (>500 m2). Seven plots with an area of 4m2 (2m×2m) were taken in each gap. The number of individuals of tree seedlings and saplings were recorded and coverage percent of herbaceous species were estimated in each plot based on extended Braun - Blanquet cover - abundance scale. In addition to counting the number of species, diversity indices including Simpson (1-D) and Shannon-Wiener (H') and Smith- Wilson’s evenness indices were calculated. The Kolomogrov-Smirnov test was used to study the normality of data and then one-way ANOVA test was performed using SAS software. Totally 38 natural and 30 created gaps were identified. The results revealed that mean of each gap size was 371 m2. There were no significant difference between the size of natural and created gaps but the number and total regeneration were significant differences among natural and created gaps. The least abundance of seedlings were obtained in the small gaps. Also diversity indices had maximum in the created gaps.

The study of forest structure is one of the basic requirements to achieve the objectives of close to nature silviculture. The purpose of this study was to identify the structural characteristics of coppice forest stands in Fandoghlou forest, Ardebil province. Three representative sites were carefully selected after detailed field survey. In each site, 3 sample plots with one hectare area (100×100 m) were established according to a random systematic design. In addition, in each sample plot, 25 subplots (4×5m) were determined for regeneration study. In each microplot, the frequency of regeneration was recorded in different diameter and height classes. Data were analyzed using appropriate softwares (Excel and SPSS). Results showed that, Fagus orientalis Lipesky, is the dominant species in one of the sites and in two other sites, beech accompanied hornbeam and hazelnut. The situation of stand structure and regeneration in site one and two were better than site three. Distribution charts of number in diagonal classes showed uneven-aged and irregular stands. Mean comparison of structural parameters in studied sites showed a significant difference at 5% confidence level for various sites.

The activity of terrestrial organisms and their populations is an appropriate index for assessing the quality and health of the soil in forest ecosystems, which related to the fertility, and reproduction of the habitat. Current research studied the effect of four forest stands with different composition of Fagus/Carpinus/ Alnus/Diospyros (600 -700 m), Fagus/Carpinus/Alnus (1100 - 1200 m), Fagus/Carpinus (1600 -1700 m) and pure Fagus (2100 - 2200 m) located in Golband district of Noushahr, on litter and soil qualitative characters. In each of forest stands, eight organic and mineral samples (25×25 area to 30 cm soil depth) were taken and transferred to the laboratory. To investigate the difference and or non-difference the studied characteristics among different forest stands, one-way ANOVA and the Duncan multiple tests were employed. The litter (carbon and nitrogen contents) and soil (water content, pH, organic C, total N, earthworm density/biomass, nematode density and microbial activities) properties were measured. According to results, the maximum of soil earthworms (with higher ratio of epigeic) and nematodes recorded under Fagus mixed with Carpinus, Alnus and Diospyros. In addition, tree diversity in mixed stand of Fagus/Carpinus/Alnus/Diospyros improved microbial activities (i.e. basal respiration, substrate induced respiration, microbial biomass C and N, microbial and metabolic quotients and carbon availability index) compared to the other studied forest stands. PCA is indicating the outstanding effects of soil organic and mineral layers on the variation of soil biological properties. The result of this research shows the positive role of tree species diversity in improving qualitative and soil health.

The study of forest structure is one of the fundamental and necessary researches to achieve the objectives of close to nature silviculture. This research was conducted to quantify the forest stand structure in the old-growth phase in compartment 419 of Shafaroud forests in west of Guilan province. Three one-hectare areas were chosen in this phase and full calipering method used to record stand structure. In each plot, 30×30 m gird plot was laid out and diameter at breast height, distance among trees and the angle between them were measured for the closest beech to the center of plot as reference tree. Three neighbor trees closest to the reference tree were also measured. According to the results meanwhile diameter and height differentiation were 0.42 and 1.7, respectively. According to the mingling index, beech trees moderately tend to occur with other species in this phase. The old growth phase is an important and fundamental stage in the development of mixed beech stands the true recognition of which is useful in facing with new challenges in forest stand management.

This current research was investigated the long – term effects of fire on vegetation and regeneration of beech (Fagus orientalis L.) in the mountain forest in Lesakoti forests in Tonekabon city in north of Iran. In both of burnt and unburnt areas, 30 plots 1000m2 and in total 60 sampling plots were identified using random-systematic 100 m × 150 m grid and density and DBH of trees and density of shrub and regeneration were recorded. Results indicated that the fire has changed the forest uneven aged structure to irregular even aged structure in burned area, and by destroying of low diameter trees and establishment of more light demanding species instead of shade tolerant species, changed primary situation of the burned area. The fire has changed forest tree composition from pure stands to mixed stands as the species of Carpinus betulus, Carpinus orientalis, Acer velutinum, Acer platanoides, Acer cappadocicum, Acer campester, Cerasus avium, Fraxhnus excelsior and Quercus macranthera were appeared. The result showed that fire decreased tree density in the burned area (130.02 in burned area and 236.71 in unburned area). There was significant difference as total density of regeneration between burned and unburned areas (1765 in burned area and 1283 in unburned area), and for each species regeneration there was significant difference. There was significant difference in density of shrubs between two areas, so that density of shrubs in burned area (250.02) was more than unburned area (193.77). According to the conditions of the study area, the implementation of silvicultural operations can improve the regeneration composition and density condition.

The aim was to investigate the relationship between macrofauna biodiversity with quality or decay grade of beech logs deadwood and some environmental factors in the East Hyrcanian forests. 108 fallen beech dead woods have been selected for this purpose that have appropriate frequency in four decay classes, three diameter classes from 10 to 100 cm and three classes of altitude above sea level from 250 to 900 m. The macro fauna samples were collected in the field under dead wood skin and inside wood with a knife and hand sorting. The total macro fauna observed belonging to 7 classes, 10 orders and 27 families. The results showed that two orders Coleoptera and Geophilomorpha, two families Lumbricidae and Arionidae and two genus Julus and Octotemnus had the highest and lowest macro fauna frequency respectively. Richness and diversity of macro fauna have decreased with increasing altitude above sea level. Dominance indices were decreased with increasing the dead wood quality (decay stage class) while richness and diversity were increased. Slope and elevation, were introduced as the most important environmental factors that controlled macro fauna biodiversity of fallen beech dead wood.

Estimation and mapping of forest resources is a prerequisite for sustainable forest management. Site productivity is a key indicator of forest ecosystem services like wood production, carbon sequestration, etc. It allows foresters to forecast growth and production and hence select the most suitable tree species for a site. Due to the extent of Hyrcanian forests and mountainous areas in these forests that are sometimes difficult to access, it seems necessary to find suitable methods for mapping the quantitative parameters in these forests. In this study, site form index which is the most reliable criterion for evaluating the site productivity of mixed and uneven stands was used. This study aims at mapping beech forest site productivity by using ordinary kriging and inverse distance weighted in research forest of Tarbiat Modares University. For this purpose, 123 0.1 ha circular sample plots were laid out in beech dominated stands. The height and diameter of beechtrees with DBH ≥ 7.5 cm within each plot was recorded. The cross validation results showed that by using criteria such as mean error (OK=-0.036, IDW=-0.192), mean absolute error (OK=1.598, IDW=1.749), root mean square error (OK=2.053, IDW=2.223), relative mean error (OK=0.104, IDW=0.553) and relative root mean square error (OK=5.906, IDW=6.393), Kriging had significant advantage over IDW method and showed high estimation accuracy. Therefore, the methods can be applied to similar uneven-aged beech stands in the north of Iran.