List of Articles Carpinus betulus

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  1 - Investigating Diameter-Height Models of Fagus and Carpinus betulus Forest in Area 40 A of Noshahr (Mazandaran)
  Nastaran Nazariani Seyedeh Kosar Hamidi Ramin Mansour Samaei
  Modeling the frequency distribution of variables such as diameter and height of trees as an important factor in the growth and performance of various branches of forest science such as forestry, forestry and biometrics in order to provide sustainable management and prop More

  Modeling the frequency distribution of variables such as diameter and height of trees as an important factor in the growth and performance of various branches of forest science such as forestry, forestry and biometrics in order to provide sustainable management and proper planning of forest resources. Altitude and diameter equations are often used to estimate the height of trees when only the diameter of the trees is measured. In the present study, 12 nonlinear elevation and diameter models were fitted for data of Beech and Hornbeam forests in the Nawshahr (Mazandaran) Area 40 A. The data were divided into two categories. 70% of the data was used for modeling and 30% for validation. In order to select the optimal model, moderate explanation coefficient criteria, mean square error and error were used. The results of different models showed that the Korf model with the coefficients of error, irregularity and mean squared error (R2 = 0.68), (BIAS = 0.52) and (RMSE = 5.82) for modeling and respectively (R2 = 0.68) (BIAS = 0.30) and (RMSE = 5.41) for validation, is a suitable model for the diameter-altitude relationship in the studied area. With regard to aspects of mathematical and biological models studied in this research, korf model as the final model to predict the height of Fagus and Carpinus betulus forests in the area is recommended. Manuscript profile
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  2 - Wood yield estimation in a Hyrcanian forest using ecological carrying capacity concept
  arman sheikh ali jafari hamid jalilvand Anoshiravan alami
  Utilization based on forest productivity potential is usually considered as part of the close to nature silvicultural methods, which are frequently prescribed to minimize damage to forest stands and natural regeneration. The current research reports the results of imple More

  Utilization based on forest productivity potential is usually considered as part of the close to nature silvicultural methods, which are frequently prescribed to minimize damage to forest stands and natural regeneration. The current research reports the results of implementation of carrying capacity technique for logging procedure in a hornbeam-alder-oak hyrcanian forestss trees, in Loveh, in Golestan province. There are three kinds of carrying capacity. Physical carrying capacity is calculated on the basis of a clear cutting assumption and maximum forest utilization. Excluding snags and young stands and putting the topography, climate and erosion limitations into account, ecological carrying capacity is estimated. Finally management carrying capacity is a portion of ecological carrying capacity, which is feasible to logging from man power and automation point of view. In the long run and for hornbeam, the result of our research indicated a tally of 2700 and 1835 trees and wood volume of 15822 and 10753.1 m3 as physical and ecological carrying capacities respectively. Physical carrying capacity values for alder and oak tree counts were 1184 and 246 trees as well as their correspondent 7340.8 and 1739.22 m3 wood productions. Ecological carrying capacity for alder was 829 trees and 5139.8 m3 wood productions and for oak were 174 trees and 1230.18 m3 wood productions. Overall about 60% of ecological carrying capacity could be regarded as management carrying capacity.s of different disease using paired quadrat covariance showed that trees and dead trees are positively correlated, such that the difference in disease severity between the trees was greater, the co-occurrence was less likely. These results, the pattern of the distribution and development of charcoal disease offers that in the management and reforestation infected forests is applications    Manuscript profile