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  • بررسی مدل های قطر و ارتفاع در مراحل تحولی مختلف جنگل های مدیریت نشده راش (مطالعه موردی: جنگل آموزشی و پژوهشی خیرود)

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کد مقاله : JEST-1608-2888 (R2) بازدید : 71 صفحه: 125 - 134

10.22034/jest.2020.11182

نوع مقاله: پژوهشی

بررسی مدل های قطر و ارتفاع در مراحل تحولی مختلف جنگل های مدیریت نشده راش (مطالعه موردی: جنگل آموزشی و پژوهشی خیرود)

محورهای موضوعی : منابع طبیعی

وحید علی جانی 1 (دانش آموخته دکتری جنگلداری و اقتصاد جنگل، دانشکده منابع طبیعی، دانشگاه تهران* (مسوول مکاتبات))
منوچهر نمیرانیان 2 (استاد گروه جنگلداری و اقتصاد جنگل، دانشکده منابع طبیعی، دانشگاه تهران)
جهانگیر فقهی 3 (استاد گروه جنگلداری و اقتصاد جنگل، دانشکده منابع طبیعی، دانشگاه تهران)
امید بزرگ حداد 4 (استاد گروه مهندسی آبیاری و آبادانی، دانشکده مهندسی و فناوری کشاورزی، دانشگاه تهران)
وحید اعتماد 5 (دانشیار گروه جنگلداری و اقتصاد جنگل، دانشکده منابع طبیعی، دانشگاه تهران)

تاریخ دریافت : 1393/08/13 تاریخ پذیرش : 1395/07/07 تاریخ انتشار : 1398/12/01

کلید واژه: خیرود, منحنی قطر-ارتفاع, مراحل تحولی, مدل‌های رگرسیونی,

چکیده مقاله :

زمینه و هدف: اندازه گیری ارتفاع تمامی درختان یک جنگل یا توده جنگلی تقریباً غیر عملی می باشد. به همین دلیل امروزه محققین مختلف ترجیح می دهند ارتفاع درختان را از رابطه ی بین قطر برابر سینه و ارتفاع درختان برآورد کنند. روش بررسی: در این مطالعه به منظور برازش مدل های مختلف آماری در طی مراحل مختلف تحولی جنگل، پس از انجام جنگل گردشی سه قطعه نمونه یک هکتاری واقع در مراحل تحولی مختلف (اولیه، بلوغ و پوسیدگی) در راشستان های مدیریت نشده جنگل خیرود دانش کده منابع طبیعی دانشگاه تهران انتخاب شدند. سپس قطر برابر سینه و ارتفاع 251 اصله درخت (در مراحل تحولی مختلف) به طور تصادفی اندازه گیری و از 80 درصد درختان به منظور مدل سازی و از 20 درصد باقی مانده به منظور اعتبار سنجی 22 مدل رگرسیونی استفاده شد. در این تحقیق، به منظور تعیین مناسب ترین مدل برای هر یک از مراحل تحولی، از معیارهای R2، E، MBE و NMPE استفاده شد. یافته ها: نتایج حاصل از این بررسی نشان دهنده ی مناسب بودن مدل های تابع نسبی و ویبول در مرحله اولیه، نمایی اصلاح شده در مرحله بلوغ و گومپرتز و ریچارد در مرحله پوسیدگی می باشد. بحث و نتیجه گیری: بر اساس نتایج حاصل از این تحقیق می توان بیان نمود که مدل های رگرسیونی مختلف دارای قابلیت یکسانی در برازش داده های قطر برابر سینه و ارتفاع توده های مختلف نمی باشند و نمی توان از یک مدل یکسان جهت برازش داده های قطر و ارتفاع توده های واقع در مراحل تحولی مختلف استفاده کرد.

چکیده انگلیسی:

Background and Objective: Height Measurement of all trees in a forest or forest stand is almost impractical. For this reason, today different researchers prefer to estimate the tree height by the relationship between the DBH and height of trees. Method: In this study, to fitting different statistical models in different stages of forest development, after field inspection, three one hectare sample plots located in different development stages in Beech forest of Kheirud forest, Natural Resources Faculty in Tehran University were selected. Then the DBH of 251 trees have been measured randomly and 80 percent of trees were used for modeling and 20 percent were used to validate 22 regression models. In order to determine the best model for each of development stages, R2, E, MBE and NMPE criteria were used. Findings: The results of this study indicated the suitability of Rational Function and Weibull models in initial stage, Modified Exponential in optimal stage and Gompertz and Richard models in Decay stages. Discussion and Conclusion: Based on the results of this study it can be concluded that different regression models doesn’t have the same ability in fitting the data of DBH and height of different forest stands and the same model can’t be used to fit the data of DBH and height of different forest stands.

منابع و مأخذ:


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  28. Özel, H. B., U. Karadavut and M. Ertekin, 2010. The use of growth models in ınvestigatıng oriental beech (Fagus orientalis Lipsky.) natural juvenitilies growth performance, African Journal of Agricultural Research, 5 (18): 2544-2550.
    29.

 

 
 



 

_||_

  1. El Mamoun H. O., El Zein A. I., and El Mugira, M. I. 2013. Modelling Height-Diameter Relationships of Selected Economically Important Natural Forests Species. Journal of forest products & industries. 2(1): 34-42.
    2.
  2. Stankova, T.V and Diéguez-Aranda, U,. 2013. Height-diameter relationships for Scots pine plantations in Bulgaria: optimal combination of model type and application. Ann. For. Res. 56(1): 149-163.
    3.
  3. Mohammadalizadeh, Kh., Namiranian, M., Zobeiri, M., Hoorfar, A. and Marvie Mohajer, M.R. 2013. Modeling of Frequency Distribution of Tree's Height in Uneven-aged Stands (Case study: Gorazbon district of Khyroud forest). Journal of Forest and Wood Product. 66 (2): 155-165. (In Persian).
    4.
  4.  Ahmadi, K., Alavi, S.J., Tabari Kouchaksaraei, M. and Aertsen, W. 2014. Comparison of non-linear height and diameter functions for oriental beech (Fagus orientalis Lipsky.) in a mixed and uneven-aged Caspian forest (Case Study: Tarbiat Modares University forest research station). Iranian Journal of Forest. 6 (1): 11-22. (In Persian).
    5.
  5. Schmidt, M., Kiviste, A. and von Gadow, K. 2011. A spatially explicit height–diameter model for Scots pine in Estonia. Eur J Forest Res. 130: 303–315.
    6.
  6. 6-Sánchez-González, M., Cañellas, I. and Montero, G. 2007. Generalized height-diameter and crown diameter prediction models for cork oak forests in Spain. Invest Agrar: Sist Recur For. 16(1): 76-88.
    7.
  7. Sharma, M., Parton, J. 2007. Height-diameter equations for boreal tree species in Ontario using amixed-effects modeling approach. Forest Ecology and Management. 249: 187–198.
    8.
  8. Huang, S. and Titus, S. 1992.Comparison of nonlinear height-diameter functions for major Alberta tree species.Can. J. For. Res. 22: 1297-1304.
    9.
  9. Leduc, D. and Goelz, J. 2009. Aheight-diameter curve for longleaf pine plantations in the gulf coastal plain. South. J. Appl. For. 33(4): 164-170.
    10.
  10. Crecente-Campo, F., Tome, M., Soares, P. and Die´guez-Aranda, U. 2010. A generalized nonlinear mixed-effects height–diameter model for Eucalyptus globulus L. in northwestern Spain. Forest Ecology and Management 259: 943–952.
    11.
  11. Krisnawati, H., Wang, Y. and Ades, P.K. 2010. Generalized height-diameter models for Acacia mangium Wild. Plantations in south Sumatra. Journal of Forestry Research. 7(1):1-19.
    12.
  12. Namiranian, M. 2000. A Study on Dimensional characters of Beech species In Gorazbon District, Kheyrud Kenar Forest. Iranian Journal of Natural Resources. 53 (1): 87-96. (In Persian).
    13.
  13. Bayat, M., Namiranian, M. and Zobeiri, M. 2014. Volume, Height and Wood Production Modeling using the Changes in a Nine Years Rotation (Case Study: Gorazbon District in Kheyroud Forest, North of Iran). Journal of Forest and Wood Product. 67 (3): 423-435. (In Persian).
    14.
  14. Delfan Abazari, B. and Sagheb-Talebi, Kh. 2007. Diameter and height increment process of oriental beech (Fagus orientalis) in natural Caspian forests; Kelardasht region. Iranian Journal of Forest and Poplar Research. 15 (4): 320-328. (In Persian).
    15.
  15. Mattaji, A. and Namiranian, M. 2003. Investigating the Structure and Evolution process of Beech Forests Natural Stands in North of Iran (Case Study: Kheyrood-Kenar, Noushahr). Iranian Journal of Natural Resource. 55 (4): 531-541. (In Persian).
    16.
  16. Calma, R. & Montero, G. 2004. Interregional non-linear height-diameter model with random coefficients for stone pine in Spain. Canadian Journal of Forest Research 34: 150–163.
    17.
  17. Corral-Rivas, S., Álvarez-González, J. G., Crecente-Campo, F. and Corral-Rivas, J. J. 2014. Local and generalized height-diameter models with random parameters for mixed, uneven-aged forests in Northwestern Durango, Mexico. Forest Ecosystems. 1(6):1-9.
    18.
  18. Unkhown. 2010. Forest Management Planning (Gorazbon district of Kheirud forest). Department of Forestry and Forest Economic. University of Tehran. 297 p. (In Persian).
    19.
  19. Korpel, S., 1995. Die Urwälder der Westkarpaten. Gustav Fischer, Berlin. 310 p.
    20.
  20. Sagheb-Talebi, Kh., Delfan Abazari, B., Namiranian, M. 2003. Description of decay stage in a natural Oriental beech (Fagus orientalis Lipsky) forest in Iran, preliminary results. In: Commarmot B, Hamor FD (eds) Natural forests in the temperate zone of Europe-values and utilization. Proceedings of conference in Mukachevo, Ukraine, October 13-17, 2003, pp 130-134.
    21.
  21. Sefifi, K. and Marvie Mohadjer, M.R. 2010. Charachteristics of coarse woody debris in successional stages of natural beech (Fagus orientalis) forests of Northern Iran. J. For. Sci. 56: 7-17.
    22.
  22. Akhavan, R.,Sagheb-Talebi, Kh., Zenner, E. K., Safavimanesh, F. 2012. Spatial patterns in different development stages of an intact old-growth Oriental beech forest in the Hyrcanian region of Iran.Eur J Forest Res. 131: 1355-1366.
    23.
  23. Hyams, D. 2010. Curve expert 1.40: A curve fitting system for Windows. http://curveexpert.webhop.biz/
    24.
  24. Sadeghi, S.M.M., Attarod, P., Van Stan II, J.T., Pypker, T.G. and Dunkerley, D., 2015. Efficiency of the reformulated Gash's interception model in semiarid afforestations. Agricultural and Forest Meteorology, 201: 76–85.
    25.
  25. Fang, Z., Bailey, R.L. 1998. Height-diameter models for tropical forests on Hainan Island in southern China. Forest Ecology and Management 110: 315–327.
    26.
  26. Scaranello, M. A. S.,  Alves, L. F., Vieira, S. A., Camargo, P. B. C., Joly, C. A., Martinelli, L. A. 2012. Height-diameter relationships of tropical Atlantic moist forest trees in southeastern Brazil. Scientia Agricola. 69(1): 26-37.
    27.
  27. Batista, J.L., Couto, H.T.Z., Marquesini, M. 2001. Performance of height-diameter relationship models: analysis in three forest types. Scientia Forestalis 60: 149–163 (in Portuguese, with abstract in English).
    28.
  28. Özel, H. B., U. Karadavut and M. Ertekin, 2010. The use of growth models in ınvestigatıng oriental beech (Fagus orientalis Lipsky.) natural juvenitilies growth performance, African Journal of Agricultural Research, 5 (18): 2544-2550.
    29.

 

 
 



 

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