تأثیر شدت نور نسبی و موقعیت مکانی قطعه‌نمونه بر ویژگی‌های کمی زادآوری شش گونه درختی (مطالعه موردی: جنگل لوه- استان گلستان)

نوع مقاله : علمی- پژوهشی

نویسندگان

1 استادیار پژوهش، مؤسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران،‌ ایران

2 کارشناس ارشد جنگل‌داری، دانشکده علوم جنگل‌، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران

3 دکتری جنگل‌داری، مؤسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران،‌ ایران

4 کارشناس، پژوهشکده گیاهان و مواد اولیه دارویی، دانشگاه شهید بهشتی، تهران، ایران

چکیده

آگاهی از ویژگی‌های زادآوری در توده‌های جنگلی، از موارد مهم و ضروری در مدیریت درست منابع جنگلی است. هدف از اجرای پژوهش پیش‌رو، شناسایی گونه‌های مناسب برای کاشت در موقعیت‌های مختلف داخل روشنه (مرکز، حاشیه و زیر تاج‌پوشش) و تأثیر تغییرات شدت نور نسبی بر مشخصه‌های رویشی نهال‌های گونه‌های مختلف بود. ده روشنه در توده‌های طبیعی بلوط- ممرز در سری یک جنگل لوه (استان گلستان) انتخاب شد و ویژگی‌های مختلف زادآوری در موقعیت‌های مختلف روشنه اندازه‌گیری شدند. نتایج نشان داد که فراوانی گونه‌ها در موقعیت‌های مختلف روشنه و شدت‌های مختلف نور نسبی متفاوت بود. در بین نهال‌های گونه‌های مختلف فقط متوسط اندازه نوشاخه بهاره نهال‌های بارانک (Sorbus torminalis) در مرکز روشنه با اختلاف معنی‌داری بیشتر از موقعیت‌های دیگر بود. همچنین فقط رویش طولی سالانه بارانک در شدت نور نسبی بیشتر از 40 درصد و رویش قطری سالانه ممرز (Carpinus betulus) و آلوکک (Prunus avium) در شدت نور نسبی 30 تا 40 درصد با اختلاف معنی‌داری بیشتر از شدت‌های نور نسبی دیگر بود. پیشنهاد می‌شود که آمیختگی و نیازهای اکولوژیک گونه‌ها هنگام جنگل‌کاری در روشنه‌ها مورد توجه کارشناسان قرار گیرد.
 

کلیدواژه‌ها

عنوان مقاله [English]

Effects of position within gap and relative light intensity on quantitative regeneration attributes of six tree species (Case study: Loveh forest- Golestan province)

نویسندگان [English]

  • Pejman Parhizkar 1
  • Yaser Shahini 2
  • Mohammad Hosein Sadeghzadeh Hallaj 3
  • Azade Yaghoubian 4
1 Research Expert, Medical Plant and Drugs Research Institute, Shahid Beheshti University, Tehran, Iran
2 M.Sc. Forestry, Faculty of Forest Science, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
3 Ph.D. Forestry, Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran
4 Assistant Prof., Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran
چکیده [English]

Identifying regeneration characteristics is a decisive prerequisite in forest stands management. Therefore, the objective of this research was to 1) present the most appropriate tree species for reforestation within stand gaps and 2) study the effect of relative light intensity on regeneration characteristics. Quantitative characteristics were measured in 10 gaps at district one of Loveh forest in Golestan province. Results showed differing frequencies of species depending on gap positions and relative light intensities. Except checker (Sorbus torminalis) regenerations, no significant difference was observed between mean of spring shoot length within gap positions. Annual height growth of checker was maximum for 40% relative light intensity, while the annual diameter growth of hornbeam (Carpinus betulus) and wild cherry (Prunus avium) were maximum for relative light intensity ranging between 30 and 40%, respectively. No significant difference for relative light intensities was observed between other spices characteristics. Therefore, the study concludes that the highest attention should be paid to species mixtures and their ecological requirements for reforestation within the gaps.
 

کلیدواژه‌ها [English]

  • Gap
  • Growth
  • Loveh
  • regeneration
  • relative light intensity

مراجع

- Anonymous, 2001. Forest Management Plan, Loveh Forest, District No. 1. Published by Natural Resources and Watershed Management Office at Golestan province, Gorgan, 780p (In Persian).
- Bihamta, M.R. and Zare Chahouki, M.A., 2008. Principles of Statistics for the Natural Resources Sciences. University of Tehran Press, Tehran, 300p (In Persian).
- Collet, C. and Chenost, C., 2006. Using competition and light estimates to predict changing canopy conditions. Forestry, 79: 489-502.
- Collins, B.S. and Pickett, S.T.A., 1987. Influence of canopy opening on the environment and herb layer in a northern hardwoods forest. Vegetatio, 70(1): 3-10.
- Fotouhi Ardakani, A., 2002. SPSS 10 (translation). Shaygan Press, Tehran, 448p (In Persian).
- Frazer, G.W., Canham C.D. and Lertzman, K.P., 1999. Gap Light Analyzer (GLA): Imaging Software to Extract Canopy Structure and Gap Light Transmission Indices from True-color Photographs, User's Manual and Program Documentation. Published by Simon Fraser University, Burnaby, British Columbia, and Institute of Ecosystem Studies, Millbrook, New York, USA, 36p.
- Ghelichkhani, M.M., Tabari, M., Akbarinia, M. and Espahbodi, K., 2006. Influence of light intensity and root pruning on growth seedling of Quercus castaneifolia C.A.Meyer. Pajouhesh & Sazandegi, 66: 39-45 (In Persian).
- Hojati, S.M., 1999. Determination of the age structure of natural beech regeneration in Gorazbon district of Kheyrodkenar. M.Sc. thesis, Faculty of Natural Resources, University of Tehran, Karaj, 68p (In Persian)
- Hoseini, A., Moayeri, M.H. and Heydari, H., 2008. Effect of site elevation on natural regeneration and other characteristics of oak (Quercus brantii) in the Hyana forest, Ilam. Iranian Journal of Natural Resources, 15(1): 183-194 (In Persian).
- Larsen, D.R., 1997. Oak regeneration and over-story density in the Missouri Ozarks. Canadian Journal of Forest Research, 27(6): 869-875.
- Marvi Mohajer, M., 2006. Silviculture. Tehran University Press, Tehran, 404p (In Persian).
- Muick, P.C., 1990. Effects of shade on blue oak and coast live oak regeneration in California annual grasslands. Proceedings of the Symposium on Oak Woodlands and Hardwood Rangland Management. Davis, California, 31 Oct- 2 Nov. 1990: 165-174.
- Nagel, T.A., Svoboda, M., Rugani, T. and Diaci, J., 2010. Gap regeneration and replacement patterns in an old-growth Fagus-Abies forest of Bosnia-Herzegovina. Plant Ecology, 208: 307-318.
- Paluch, J.G., 2005. The influence of the spatial pattern of trees on forest floor vegetation and silver-fir (Abies alba Mill.) regeneration in uneven-age forest. Forest Ecology and Management, 205: 283-298.
- Parhizkar, P., Sagheb-Talebi, Kh., Mataji, A. and Namiranian, M., 2011a. Influence of gap size and development stages on the silvicultural characteristics of oriental beech (Fagus orientalis Lipsky) regeneration. Caspian Journal of Environmental Sciences, 9(1): 55-65.
- Parhizkar, P., Sagheb-Talebi, Kh., Mataji, A., Nyland, R.D. and Namiranian, M., 2011b. Silvicultural characteristics of oriental beech (Fagus orientalis Lipsky) regeneration under different RLI and positions within gaps. Forestry, 84(2): 177-185.
- Powers, M.D., Pregitzer, K.S. and Palik, B.J., 2008. Physiological performance of three pine species provides evidence for gap partitioning. Forest Ecology and Management, 256: 2127-2135.
- Saeb, K., Noori Shirazi, M., Kialashaki, A. and Jafari Hajati, R., 2012. Effect of light on quantitative and qualitative characteristics of hornbeam seedlings (Case study: Kokrood forest, Mazandaran). Iranian Journal of Forest and Poplar Research, 19(4): 478-490 (In Persian).
- Sagheb-Talebi, Kh., 1996. Quantitative und Qualitative Merkmale von Buchen-jungwüchsen (Fagus sylvatica L.) unter dem Einfluss des Lichtes und anderer Standorts Faktoren. Beiheft zur Schweizerischen Zeitschrift für Forstwesen (SZF), Nr. 78, Zurich, 219p.
- Sagheb-Talebi, Kh., Hemati, A., Khanjani Shirazi, B., Siahipoor, Z. and Akbarzadeh, A., 2008. Architectural model and impact of root pruning on diameter and height growth of oak (Quercus castaneifolia) seedlings (Pilambara-Guilan). Iranian Journal of Natural Resources, 61(4): 867-876 (In Persian).
- Sagheb-Talebi, Kh., Jashni, J., Mohammadnejad Kiasari, Sh., Mohammadi Nasrabadi, H. and Paydar, M., 2012. Light regime in natural and planted stands of the Caspian Forests. Iranian Journal of Forest and Poplar Research, 20(1): 165-181.
- Schütz, J.P., 2004. Opportunistic methods of controlling vegetation, inspired by natural plant succession dynamics with special reference to natural out mixing tendencies in a gap regeneration. Annals of Forest Science, 61: 149-156.
- Shahini, Y., Sagheb-Talebi, Kh., Heidari, H.O., Parhizkar, P. and Azadfar, D., 2014. Impact of light and position in gap on quantitative and qualitative characteristics of oak (Quercus castanefolia C. A. Mey.) seedlings in Loveh, Gorgan. Journal of Wood and Forest Science and Technology, 21(1): 83-101 (In Persian).
- Vahedi, A.A., Mataji, A. and Noori Shirazi, Gh., 2009. Study on impact of relative intensity on some characteristics of Carpinus betulus seedlings (Case study: Khanykan, Nowshahr). Proceedings of the Third Forest National Conference: Forests and Sustainable Development, Challenges and Solutions Karaj, May 11–13, 2009: 202–217 (in Persian).
- Yazdi Samadi, B., Rezaee, A.M. and Vlizadeh, M., 2002. Statistical Research Projects in Agriculture. Tehran University Press, Tehran, 764p.
- Zhu, J., Matsuzaki, T., Lee, F.Q. and Gonda, Y., 2003. Effect of gap size created by thinning on seedling emergency, survival and establishment in a coastal pine forest. Forest Ecology and Management, 182: 339-354.
- Zobeiri, M., 2002. Forest Biometry. Tehran University Press, Tehran, 411p (In Persian).
 

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