| تعداد نشریات | 285 |
| تعداد نشریات سازمان | 83 |
| تعداد شماره‌ها | 2,810 |
| تعداد مقالات | 31,895 |
| تعداد مشاهده مقاله | 40,508,865 |
| تعداد دریافت فایل اصل مقاله | 17,861,951 |
ویژگی‌های کمی تجدیدحیات راش شرقی (Fagus orientalis Lipsky) در داخل روشنه و زیر پناه پوشش تاجی (مطالعه موردی: بخش گرازبن جنگل خیرود نوشهر) | ||
| تحقیقات جنگل و صنوبر ایران | ||
| مقاله 3، دوره 23، شماره 1، فروردین 1394، صفحه 13-24 اصل مقاله (482.44 K) | ||
| نوع مقاله: علمی- پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijfpr.2015.102326 | ||
| نویسندگان | ||
| نسرین نصیری* 1؛ محمدرضا مروی مهاجر2؛ وحید اعتماد3؛ کیومرث سفیدی4 | ||
| 1کارشناسی‌ارشد جنگل‌شناسی و اکولوژی جنگل، دانشکده منابع طبیعی، دانشگاه تهران | ||
| 2استاد گروه جنگلداری، دانشکده منابع طبیعی، دانشگاه تهران | ||
| 3استادیار گروه جنگلداری، دانشکده منابع طبیعی، دانشگاه تهران | ||
| 4استادیار، دانشکده فناوری کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی | ||
| چکیده | ||
| استقرار زادآوری طبیعی به‌عنوان فرآیندی مهم در استمرار حیات توده‌های جنگلی نقش کلیدی دارد. این پژوهش با هدف بررسی کمی استقرار زادآوری راش (Fagus orientalis Lipsky) در داخل روشنه و زیر پناه پوشش تاجی، در جنگل خیرود شهرستان نوشهر انجام شد. پس از جنگل‌گردشی دو پارسل از بخش گرازبن انتخاب و با پیاده کردن شبکه‌ای با ابعاد 50 ×50 متر، نزدیک‌ترین روشنه‌ها و لکه‌های زادآوری زیر پناه پوشش تاجی در محل تقاطع اضلاع شبکه انتخاب و نوع گونه، فراوانی و ارتفاع نهال‌ها در آنها اندازه‌گیری شد. تجزیه‌و‌تحلیل داده‌ها نشان داد فراوانی و ارتفاع نهال‌های راش در زیر پناه پوشش تاجی بیشتر از فراوانی و ارتفاع آنها در داخل روشنه است و بین فراوانی و ارتفاع نهال راش در زیر پناه پوشش تاجی و داخل روشنه اختلاف معنی‌داری وجود دارد. با توجه به فراوانی و ارتفاع بیشتر نهال‌های راش در زیر پناه پوشش تاجی نسبت به داخل روشنه، می‌توان گفت که کمبود نور در ابتدای رشد گونه راش در زیر پناه پوشش تاجی نسبت به روشنه نه تنها مانعی برای افزایش فراوانی و ارتفاع نهال این گونه محسوب نمی‌شود، بلکه موجب بهبود زادآوری آن ازنظر فراوانی و ارتفاع در زیر پناه پوشش تاجی شده است. نتایج این بررسی نیاز به نور کم گونه راش یعنی سایه‌پسند بودن آن را تأیید کرد و ایجاد روشنه را پس از استقرار نهال‌های راش برای ادامه رشد نهال‌ها و تضمین بقای زادآوری‌ها در مناطقی که زادآوری این گونه در زیر پناه پوشش تاجی به فراوانی و ارتفاع کافی رسیده است، پیشنهاد می‌کند. | ||
| کلیدواژه‌ها | ||
| پناه پوشش تاجی؛ راش شرقی؛ روشنه؛ زادآوری طبیعی | ||
| عنوان مقاله [English] | ||
| Natural regeneration of oriental beech (Fagus orientalis Lipsky) within canopy gaps and under canopy cover, (Case study: Gorazbon, Kheyroud Forest, Nowshahr) | ||
| نویسندگان [English] | ||
| Nasrin Nasiri1؛ Mohammad Reza Marvie Mohadjer2؛ Vahid Etemad3؛ Kiomars Sefidi4 | ||
| 1M.Sc. Silviculture and Forest Ecology, Faculty of Natural Resources, University of Tehran, Karaj, Iran | ||
| 2Prof., Faculty of Natural Resources, University of Tehran, Karaj, Iran | ||
| 3Assistant Prof., Faculty of Natural Resources, University of Tehran, Karaj, Iran | ||
| 4Assistant Prof., Faculty of Agriculture and Natural Resources Technology, University of Mohaghegh Ardabili, Ardabil, Iran | ||
| چکیده [English] | ||
| Establishment of natural regeneration is a crucial process which plays a key role in maintaining the sustainability within the forest stands. This study aimed to investigate the quantitative characteristics of oriental beech regeneration within canopy gaps and under the canopy in Kheyroud forests of Nowshahr in the north of Iran. Two compartments were initially selected, within which a sampling grid featuring 50×50 m distance between plots was established. Regeneration frequency, species and height of seedlings and saplings were measured both within the gaps and under the canopy. Results showed the frequency and mean height of beech regeneration to be higher under canopy layer. Those parameters also significantly differed from those within the gaps. Our findings also show that the reduced light under the canopy is by no means an obstacle to increase the beech regeneration, but it rather contributes to improve the establishment of natural regeneration of beech. This research confirms the previous findings on the shade tolerance of beech and suggests creating canopy gaps in those stands in which beech seedlings are previously stabilized as a mean to support the natural regeneration. | ||
| کلیدواژه‌ها [English] | ||
| Canopy Cover, oriental beech, Canopy gaps, Natural regeneration | ||
| مراجع | ||
|
- Agestam, E., Ekö, P.M., Nilson, U. and Welander, N.T., 2003. The effects of shelterwood density and site preparation on natural regeneration of Fagus sylvatica in southern Sweden. Forest Ecology and Management, 176(1): 61-73. - Albanesi, E., Gulgliotta, Ol., Mercurio, l. and Mercurion, R., 2008. Effects of gap size and within-gap position on seedlings establishment in silver fir stands. Forest, 1(1): 55-59. - Amoli Kondori, A.R., Marvie Mogajer, M.R., Zobeiri, M. and Etemad, V., 2011. Natural regeneration of tree species in relation to gaps characteristics in natural beech stand (Fagus orientalis Lipsky), North of Iran. Iranian Journal of Forest and Poplar Research, 20(1): 151-164 (In Persian). - Amiri, M., Dargahi, D., Habashi, H., Azadfar, D. and Solaymani, N., 2008. Comparision of regeneration density and species diversity in managed and natural stands of Loveh Oak Forest. Journal of Agriculture Science and Nature Resource, 15(6): 44-53 (In Persian). - Anonymous, 2010. Forest management plan of Kheyrood, University of Tehran, 450p. - Delfan Abazeri, B., Sagheb-Talebi, Kh. and Namiranian, M., 2005. Investigation of development stage of control part in beech forest (Case study: reserve area-lenga). Iranian Journal of Forest and Poplar Research, 12(3): 251-265 (In Persian). - Diaci, J., 2002. Regeneration dynamics in a Norway spruce plantation on a silver fir-beech forest site in the Slovenia Alps. Forest Ecology and Management, 161(1): 27-38. - d,Oliveira, M.V.N. and Ribas, L.A., 2011. Forest regeneration in artificial gaps twelve years after canopy opening in Acre State Western Amazon. Forest Ecology and Management, 261(11): 1722-1731. - Emborg, J., 1998. Understorey light conditions and regeneration with respect to the structural dynamics of a near-natural temperate deciduous forest in Denmark. Forest Ecology and Management, 106(2): 83-95. - Emborg, J., 2007. Suppression and release during canopy recruitment in Fagus sylvatica and Fraxinus excelsior, a dendro-ecological study of natural growth patterns and competition. Ecological Bulletines, 52: 53-67. - Fredricksen, T.S. and Mostacedo, B., 2000. Regeneration of timber species following selection logging in a Bolivian tropical dry forest. Forest Ecology and Management, 131(1): 47-55. - Gammel, P., Nilsson, U. and Welander, T., 1996. Development of oak and beech seedling planted under varying shelterwood densities and with different site preparation methods in southern Sweden. New Forests, 12(2): 141-161. - Gratzer, G., Darabant, A., Rai, P.B., Chhetri, P. and Eckmüllner, O., 2004. Interspecific variation in the response of growth, crown morphology and survivorship to light of six tree species in the conifer belt of the Bhutan Himalayas. Canadian Journal of Forest Research, 34(5): 1093-1107. - Lendzion, J. and Leuschner, C., 2008. Growth of European beech (Fagus sylvatica L.) saplings is limited by elevated atmospheric vapourpressure deficits. Forest Ecology and Management, 256(4): 648-655. - Madsen, P. and Larsen J.B., 1997. Natural regeneration of beech (Fagus sylvatica L.) with respect to canopy density, soil moisture and soilcarbon content. Forest Ecology and Management, 97(2): 95-105. - Marvie Mohadjer, M.R., 2011. Silviculture and Forest Tending. University of Tehran Press, 418p. - Mostacedo, B., Putz, F.E., Fredericksen, T.S., Villca, A. and Palacios, T. 2009. Contributions of root and stump sprouts to natural regeneration of a logged tropical dry forest in Bolivia. Forest Ecology and Management, 258(6): 978-985. - Myers, G.P., Newton, A.C. and Melgarejo, O., 2000. The influence of canopy gap size on natural regeneration of Brazil nut (Bertholletia excelsa) in Bolivia. Forest Ecology and Management, 127(1): 119-128. - Nagel, A.T., 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. - Parhizkar, P., Sagheb-Talebi, Kh., Mataji, A., Nyland, R. and Namiranian, M., 2011. Silvicultural characteristics of oriental beech (Fagus orientalis Lipsky) regeneration under different RLI and positions within gaps. Forestry, 84(2): 177-185. - Parpan, V.I., Sanikov, S.N. and Parpan, T.V., 2009. The Hypothesis of the pulsed dynamics of virgin beech forests. Russian Journal of Ecology, 40(7): 466-470. - Peltier, A., Touzet, M.C., Armengaud, C. and Ponge, J.F., 1997. Establishment of Fagus sylvatica and Fraxinus excelsior in an old-growth beech forest. Journal of Vegetation Science, 8(1): 13-20. - Powers, M.D., Pregitzerk, K.S. and Palik, B.J., 2008. Physiological performance of three pine species provides evidence for gap partitioning. Forest Ecology and Management, 256(12): 2127-2135. - Rozas, V., 2003. Regeneration patterns, dendroecology, and forest-use history in an old-growth beech-oak lowland forest in Northern Spain. Forest Ecology and Management, 182(1): 175-194. - Runkle, J.R., 1982. Patterns of disturbance in some old-growth mesic forests of eastern North America. Ecology, 63(5): 1533-1546. - Sagheb-Talebi, Kh. and Shütz, J.P., 2006. Some criteria of regeneration density in young beech population. Caspian Journal of Environmental Sciences, 10(1): 61-66. - Sefidi, K., Maravie Mohadjer, M.R., Mosandle, C. and Copenheaver, A., 2011. Canopy gaps and regeneration in old-growth Oriental beech (Fagus orientalos Lipsky) stands, Northern Iran. Forest Ecology and Management, 262(2): 1094-1099. - Shahnavazi, H., Sagheb-Talebi, Kh. and Zahedi-Amiri, G., 2005. Qualitative and quantitative evaluation of natural regeneration in gaps within beech (Fagus orientalis Lipsky) stands of Caspian region. Iranian Journal of Forest and Poplar Research, 13(2): 141-155 (In Persian). - Silva, D.E., Mazzella, R.P., Legay, M., Corcket, E. and Dupouey, J.L., 2012. Does natural regeneration determine the limit of European beech distribution under climatic stress? Forest Ecology and Management, 266: 263-272. - Szwagrzyk, J., Szewczyk, J. and Bodziarczyk, J., 2001. Dynamics of seedling banks in beech forest: results of a 10-year study on germination, growth and survival. Forest Ecology and Management, 141(3): 237-250. - Van Der Meer, P.J. and Dignan, P., 2007. Regeneration after 8 years in artificial canopy gaps in Mountain Ash (Eucalyptus regnans F. Muell.) forest in South-Eastern Australia. Forest Ecology and Management, 244(1): 102-111. - Wagner, S., Collet, C., Madsen, P., Nakashizuka, T., Myland, R.D. and Sagheb-Talebi, Kh., 2010. Beech regeneration research: From ecological to silvicultrual aspect. Forest Ecology and Management, 259(11): 2172-2182. - Wang, G. and Liu, F., 2011. The influence of gap creation on the regeneration of Pinus tabuliformis planted forest and its role in the near-natural cultivation strategy for planted forest management. Forest Ecology and Management, 262(3): 413-423. - Zeibig, A., Diaci, J. and Wagner, S., 2005. Gap disturbance patterns of a Fagus sylvatica virgin forest remnant in the mountain vegetation belt of Slovenia. Forest Snow Landscape Research, 79(1-2): 69-80. | ||
|
آمار تعداد مشاهده مقاله: 1,600 تعداد دریافت فایل اصل مقاله: 939 |
||