| تعداد نشریات | 282 |
| تعداد نشریات سازمان | 80 |
| تعداد شمارهها | 3,230 |
| تعداد مقالات | 35,784 |
| تعداد مشاهده مقاله | 54,009,447 |
| تعداد دریافت فایل اصل مقاله | 93,167,840 |
اثر شدت نامنظمی های پوشش تاجی در عرصههای جنگلی بر جوانهزنی بذر گونههای راش (Fagus orientalis) و ممرزCarpinus betulus)) در جنگلهای هیرکانی | ||
| علوم و فناوری بذر ایران | ||
| مقاله 16، دوره 7، شماره 2 - شماره پیاپی 14، بهمن 1397، صفحه 219-236 اصل مقاله (1 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22034/ijsst.2019.110231.1080 | ||
| نویسندگان | ||
| جواد میرزایی* 1؛ مهدی حیدری1؛ شیرزاد گرایلی2؛ وحید اعتماد3؛ مهرداد زرافشار4 | ||
| 1هیات علمی دانشگاه ایلام | ||
| 2دانشجوی دکتری- دانشگاه ایلام | ||
| 3گروه جنگلداری و اقتصاد جنگل، دانشکده منابع طبیعی، دانشگاه تهران | ||
| 4بخش تحقیقات منابعطبیعی، مرکز تحقیقات و آموزش کشاورزی و منابعطبیعی فارس، سازمان تحقیقات، آموزش و ترویج کشاورزی، شیراز، فارس، ایران | ||
| چکیده | ||
| به منظور شناخت اثر آشفتگیهای پوشش تاجی بر کمیت و کیفیت جوانهزنی بذر درختان جنگلی، بذر دو گونه تجاری جنگلهای شمال ایران شامل راش و ممرز از روشنههای طبیعی و مصنوعی با مساحتهای مختلف جمعآوری و صفات جوانهزنی آنها بررسی شد. در این راستا، تعداد 48 روشنه در یک تیپ راشستان آمیخته در طرح جنگلداری حاجیکلا- تیرانکلی از حوزه آبخیزرودخانه تجن-ساری شناسایی شد. روشنهها در سه کلاسه مساحت شامل کمتر از 150 (کوچک)، 350-150 (متوسط) و 500-350 (بزرگ) مترمربع طبقه بندی شده و بذر گونههای راش و ممرز از داخل روشنه و از توده مجاور آنها بعنوان شاهد جمعآوری و بلافاصله آزمون جوانهزنی بر روی آنها انجام شد. درصد جوانهزنی، سرعت جوانهزنی و میانگین زمان جوانهزنی برای تمامی بذرها محاسبه و مورد تجزیه و تحلیل آماری قرار گرفت. مقایسه نتایج بدست آمده نشان داد که بین صفات جوانهزنی دو نوع روشنه طبیعی و مصنوعی اختلاف قابل ملاحظه-ایوجود ندارد در حالی که بذرهای جمع آوری شده از هر دو گونه از داخل روشنههای متوسط و بزرگ، درصد جوانهزنی و گاهی اوقات سرعت جوانهزنی بیشتری داشتند. بنظر میرسد که شرایط بهینه محیطی از قبیل رطوبت، دما و نور در داخل روشنههای بزرگتر از 150 مترمربع در جهت حفظ کیفیت بذرهای راش و ممرز فراهمتر میباشد. پیشنهاد میگردد که تحقیق مشابه بر روی بذر سایر درختان جنگلی نیز مورد توجه قرار گیرد. | ||
| کلیدواژهها | ||
| روشنه تاجپوشش؛ بذر؛ جوانه زنی؛ شرایط محیطی | ||
| عنوان مقاله [English] | ||
| Effect of Disturbance Intensity of Canopy Gap in Forest Stands on Seed Germination of Beech (Fagus orientalis) and Hornbeam (Carpinus betulus) Trees at Hyrcanian Forest | ||
| نویسندگان [English] | ||
| javad mirzaei1؛ mehdi heydari1؛ shirzad Gerayli2؛ vahid Etemad3؛ mehrdad zarafshar4 | ||
| 1Ilam university | ||
| 2Ph.D student, Ilam University | ||
| 3Department of Forestry and Forest Economic, Faculty of Natural Resources, Tehran University | ||
| 4Department of Natural Resources Research, Fars Agricultural and Natural Resources Research and Education Center, AREEO, Shiraz, Fars, Iran | ||
| چکیده [English] | ||
| To understanding of effect of canopy gap disturbance on quantity and quality of seed germination of forest trees, seeds of two economic trees in Hyrcanian forest including Fagus orientalis and Carpinus betulus were collected from some canopy gaps with different sizes and their germination parameters were studied. In this regard, 48 canopy gaps were identified from a mixed Fagetum stand at Hajikola-Tirankli forestry plan from Tajan River watershed. In the following, the canopy gaps were classified to three difference size classes such as smaller than 150 (small), 150-350 (moderate) and 350-500 m2 (large) and the seeds of the Beech and Hornbeam were collected from inside and outside of the canopy gaps and seed germination test were done on the collected seeds. Seed germinant percent, germination speed and mean seed germination time were calculated and then statistically analyzed. Comparison of the collected data showed that there is no considerable difference between natural and artificial canopy gaps in aspect of seed germination parameters while for both species, collected seeds from moderate and large canopy gaps had higher seed germination and sometimes germination speed. It seems that optimal environmental condition such as moisture, temperature and light is better provided in canopy gaps bigger 150 m2 for seed germination of both species. Same research would be suggested on the other tree species. | ||
| کلیدواژهها [English] | ||
| Canopy gaps, seed, germination, Environmental condition | ||
| مراجع | ||
|
Abrari Vajari, K., H. Jalilvand, M.R. Pourmajidian, K. Espahbodi, and A. Moshki. 2012. Effect of canopy gap size and ecological factors on species diversity and beech seedlings in managed beech stands in Hyrcanian forests. J. For. Res. 23(2): 7-14. Aliarab, A., S.G. Jalali, M. Tabari, M. Akbarinia, and S.M. Hosseini. 2006. Emergence, survival and early growth of oak (Quercus castaneifolia C.A. Mey) seedlings under different canopy densities in Chamestan forest-northern Iran. Pajouhesh va Sazandegy. 69: 44-49. (In Persian, with English Abstract) Aliyari, F., A. Soltani, M. Zarafshar, and A. Sattarian, 2016. The interaction effect of temperature anddrought on seed germination of Cypress (Cupressus sempervirens var. horizontalis). For. Res. Dev. 2 (2): 181-191. (In Persian, with English Abstract) Amanzedae, B., M.R. Pourmajidian, Kh. Sagheb Talebi, and S.M. Hojati. 2015. Impact of Canopy Gap Size on Plant Species Diversity and Composition in Mixed Stands, case study: Reserve Area, District No.3 Asalem Forests. J. For. Wood Pro. 68 (2): 287-301. (In Persian, with English Abstract) Amiri, M., D. Dargahi, H. Habashi, D. Azadfar, and N. Solaymani. 2008. Comparison of regeneration density and species diversity in managed and natural stands of Loveh Oak Forest. J. Agri. Sci. Nat. Res. 15(6): 44-53 (In Persian). Anonymous, 2010. Hajikola-Tirankli forestry plan, Seri 1. Natural Resource and Watershed of Mazandaran, Sari. Brokaw, N.V.L., and S.M. Scheiner. 1989. Species composition in gaps and structure of a tropical forest. Ecol. 70: 538-541. Clinton, B.D. 2003. Light, temperature, and soil moisture responses to elevation, evergreen understory, and small canopy gapsin the southern Appalachians. For. Ecol. Manag. 186: 243–255. Collet, C., and C. Chenost, 2006. Using competition and light estimates to predict diameter and height growth of naturally regenerated beech seedlings growing under changing canopy conditions. For. 79: 489–502. Haghvordi, K., H. Kiadaliri, Kh. SaghebTalebi, S.M. Hoseini. 2011. Impact of Relative Light Intensity on Ground Flora in Dead tree Gaps of Fagus orientalis. J. Sci. Technol. Nat. Mihok, B., L. Gálhidy, K. Kenderes, and T. Standovár. 2007. Gap regeneration patterns in a semi-natural beech forest stand in Hungary. Acta Silvatica Lignaria Hungarica, 3: 31–45. Mirdar Harijani, M., M.R. Pourmajidian, H. Jalilvand, and Gh. Zahedi Amiri. 2016. Effect of Crown Gap Size on Forest Natural Regeneration Establishment and Survival (Case Study: Parcel No 18, Forestry Plan Jamand Series). J. Env. Sci. Tech. 18 (3):192-202. Mohammadi, L., M.R. Marvie-Mohadjer, V. Etemad, and K. Sefidi. 2014. Quantitative characteristics of regeneration in natural and tree fall canopy gapsin the mixed beech stands, Northern Iran (Case Study: Namkhaneh district, Kheyrud Forest). Ir. J. For. 6 (4): 457-470. (In Persian, with English Abstract) Mostacedo, B., F.E. Putz, T.S. Fredericksen, A.Villca, and T. Palacios. 2009. Contributions of root and stump sprouts to natural regeneration of a logged tropical dry forest in Bolivia. For. Eco. Manag. 258(6): 978-985. Nasiri, N., M.R. Marvie Mohadjer, V. Etemad, and K. Sefidi. 2015. Natural regeneration of oriental beech (Fagusorientalis Lipsky) within canopy gaps and under canopy cover, (Case study: Gorazbon, Kheyroud Forest, Nowshahr). Ir. J. For. Pop. Res. 23 (1): 13-24. (In Persian, with English Abstract) Sagheb-Talebi, K., and J.P. Schutz. 2002. The structure of natural oriental beech (Fagus orientalis) forests in the Caspian region of Iran and potential for the application of the group selection system. For. 75: 465–472. Santiago, J. M., and D.R. Amanda. 2005. Dead trees resources for forest wildlife, extension fact sheet. Ohio State University Express. Sapkota, IP., M. Tigabu, and P.C. Odén. 2009. Species diversity and regeneration of old-growth seasonally dry Shorearobusta forests following gap formation. J. For. Res. 20(1): 7-14. Scharenbroch, B.C., and J.G. Bockheim. 2007. Impacts of forest gaps on soil properties and processes in old growth northern hardwood-hemlock forests. Plant and Soil. 294: 219-233. Sefidi K., M.R. Marvie-Mohadjer, R. Mosandl, and C.A. Copenheaver. 2011. Canopy gaps andregeneration in old-growth Oriental beech (FagusorientalisLipsky) stands, northern Iran. For. Ecol. Manag. 262:1094-1099. Shabani, S., M. Akbarinia, G. Jalali, and A.R. Aliarab. 2011. Relationship between Soil Characteristics and Beech Regeneration Density in Canopy Gaps with Different Sizes. J. Wood & For. Sci. Tech. 18(3): 63-78. (In Persian, with English Abstract) Tavili, A., N. Ghanbari, and H. Yazdanshenas. 2015. The effect of drought and salinity stress on seed germination characteristic and seedling growth of salsola crassa under laboratory and greenhouse conditions. Ir. J. Seed Sci. Res. 2 (1): 15-25. (In Persian, with English Abstract) Wang, G., and F. Liu. 2011. The influence of gap creation on the regeneration of Pinustabuliformis planted forest and its role in the near-natural cultivation strategy for planted forest management. For. Eco. Manag. 262(3): 413-423 Woods, K.D. 2000. Dynamics in late-successional hemlock-hardwood forests over three decades. Ecol. 81: 110-126. Zoghi, M., R. Rahmani, and E. Shayesteh Pahangeh. 2012. Effect of gap size on quantitative characteristics of regeneration groups in a Parrotio Carpinetum forest type (Shastkola forest). Ir. J. For. Pop. Res. 20 (3): 493-504. (In Persian, with English Abstract) | ||
|
آمار تعداد مشاهده مقاله: 519 تعداد دریافت فایل اصل مقاله: 481 |
||