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تعیین معادله ضریب‌شکل تنه مناسب برای صنوبر دلتوئیدس (Populus deltoides Marsh) در ایستگاه تحقیقات البرز کرج | ||
| تحقیقات جنگل و صنوبر ایران | ||
| مقاله 5، دوره 22، شماره 2 - شماره پیاپی 56، شهریور 1393، صفحه 216-224 اصل مقاله (295.43 K) | ||
| نوع مقاله: علمی- پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijfpr.2014.10667 | ||
| نویسندگان | ||
| علی جهانی* 1؛ محسن کلاگری2؛ علیرضا مدیررحمتی3؛ رفعت الله قاسمی4 | ||
| 1استادیار دانشگاه محیط زیست | ||
| 2استادیار موسسه تحقیقات جنگلها و مراتع کشور | ||
| 3دانشیار موسسه تحقیقات جنگلها و مراتع کشور | ||
| 4مربی پژوهشیار موسسه تحقیقات جنگلها و مراتع کشور | ||
| چکیده | ||
| صنوبر دلتوئیدس (Populus deltoides Marsh) ازنظر رشد و تولید چوب در واحد سطح نسبت به گونه‌های دیگر از وضعیت بهتری برخوردار است، ازاین‌رو می‌تواند به‌عنوان یکی از گونه‌های مهم در زراعت چوب، با هدف تولید و تأمین چوب موردنیاز صنایع کشور مورد استفاده قرار گیرد. در این تحقیق به‌منظور تعیین ضریب‌شکل حقیقی، تعداد 40 اصله درخت انتخاب شد و متغیرهای طول تا دقت سانتی‌متر، قطر در محل نصف ارتفاع کل درخت (ارتفاع کنده و طول تنه افتاده)، قطر در محل 1/0، 3/0، 5/0، 7/0 و 9/0 ارتفاع درخت و همچنین قطر بالایی هر بینه دومتری درخت تا قطر پنج سانتی‌متری ساقه در تمام درختان قطع‌شده اندازه‌گیری شد. سپس ضریب‌شکل حقیقی درخت محاسبه و با ضریب‌شکل طبیعی، ضریب‌شکل هوهه‌نادل و ضریب‌شکل مصنوعی مقایسه شد. نتیجه به‌دست‌آمده از مقایسه میانگین ضرایب‌شکل در طبقات قطری مختلف به‌روش تجزیه‌واریانس دوطرفه (ANOVA) نشان داد که بین میانگین ضریب‌شکل‌ها در طبقات قطری 15 و 25 سانتی‌متر با سایر طبقات قطری تفاوت معنی‌داری وجود دارد و به‌جز ضریب‌شکل مصنوعی درخت، سایر ضرایب‌شکل تفاوت معنی‌داری را با ضریب‌شکل حقیقی درخت نشان نمی‌دهند. همچنین استفاده از ضریب‌شکل حقیقی 5028/0 در منطقه موردپژوهش، حجم حقیقی صنوبر دلتوئیدس را نشان می‌دهد و در دیگر مناطق با محاسبه ضرایب‌شکل جایگزین می‌توان به دقتی نزدیک به ضریب‌شکل حقیقی در تعیین حجم صنوبر دلتوئیدس رسید. | ||
| کلیدواژه‌ها | ||
| صنوبر دلتوئیدس؛ ضریب‌شکل حقیقی؛ ضریب‌شکل مصنوعی؛ ضریب‌شکل هوهه‌نادل؛ ضریب‌شکل طبیعی | ||
| عنوان مقاله [English] | ||
| Determining the best stem form factor equation for populous deltoides in poplar plantations of Alborz Research Station, Karaj | ||
| نویسندگان [English] | ||
| Ali Jahani1؛ Mohsen Kalagari2؛ Alireza Modirrahmati3؛ Rafatollah Ghasemi4 | ||
| 1Assistant Prof., Department of Natural Resources and Environment Sciences, University of Environment, Karaj, I.R. Iran. | ||
| 2Assistant Prof., Research Institute of Forests and Rangelands, Tehran, I.R. Iran | ||
| 3Associate Prof., Research Institute of Forests and Rangelands, Tehran, I.R. Iran. | ||
| 4Senior Research Expert, Research Institute of Forests and Rangelands, Tehran, I.R. Iran. | ||
| چکیده [English] | ||
| Populous deltoides has been proven to exceed other poplar clones in terms of growth and wood production per unit area. Thus, it is generally considered as one of the most crucial species for pulp and paper-oriented wood plantations in Iran. Here, a number of 40 trees was selected for developing true form factor (TFF) of P. deltoides. Prior to felling, the height and diameter of trees were measured. Following the felling, a set of variables including the length of tree (cm-accurate), the diameter in the 1/2 of total tree height (i.e. stump height + the length of felled tree), the diameter in 0.1, 0.3, 0.5, 0.7 and 0.9 of tree height and the top diameter of each 2 meter-high log (up to 5 cm stem diameter) were measured. Then, the Artificial, Hohenadl and Natural form factors were calculated, which were then compared with the TFF. The two-way ANOVA-based comparison of means amongst the form factors in different diameter classes revealed significant differences amongst the form factors of 15 and 25 cm with other diameter classes. All form factors showed insignificant differences except for the Artificial form factor which revealed to be significantly different than the TFF. Furthermore, the real tree volume across the study site can be derived by the calculated TFF value of 0.5028. For similar sites, this study concludes the alternative form factors (Hohenadl or Natural) to be able to be used for calculating standing volume being comparable to the real volume of P. deltiodes. | ||
| کلیدواژه‌ها [English] | ||
| Populous deltoides, true form factor, Artificial form factor, Hohenadl form factor, natural form factor, Karaj | ||
| مراجع | ||
|
- Amini, M., Namiranian, M., Saghebtalebi, Kh., Parsapajouh, D. and Amini, R. 2007. Trunk morphology of beech trees (Fagus orientalis Lipsky) on biometrical and silvicultural criteria (Case study: Haftkhal Forest, Sari, north of Iran). Iranian Journal of Natural Resources, 60(3): 843-858 (In Persian). - Avery, T.E. and Burkhart, H.E. 2002. Forest Measurements. 5th edition, McGraw-Hill, New York, 456p. - Azadfar, D. 2006. Genetic polymorphism of Peroxidase enzymes in popular genes. Report of Research Plan, Gorgan University of Agriculture Sciences and Natural Resources, 58p (In Persian). - Azarnoush, M., Feizneghad, A. and Mohammadi, B. 2011. Investigation on qualitative and quantitative features of populous deltoides in two sites of Gelafshan and Dalakkhil. Abstract of Forests and Environment Security of Sustainable Development Conference, Iran, 10-11 October: 122 (In Persian). - Bagheri, R., Namiranian, M., Zobeiri, M. and Modirrahmati, A. 2002. The production of volume table of endemic poplars of Zanjanroud. Iranian Journal of Forest and Poplar Research, 9: 1-36 (In Persian). - Chaturvedi, H.C, Sharma, A.K, Agha, B.Q, Jain, M. and Sharma, M. 2004. Production of cloned trees of populus deltoides through in vitro regeneration of shoots from leaf, stem and root explants and their field cultivation. Indian Journal of Biotechnology, 2: 203-208. - Figueiredo-Filho, A., Borders, B.E. and Hitch, K.L. 996. Taper equations for Pinus taeda plantations in southern Brazil. Forest Ecology and Management, 83: 39-46. - Garber, S.M. and Maguire, D.A. 2003. Modeling stem taper of three central Oregon species using nonlinear mixed effects models and autoregressive error structures. Forest Ecology and Management, 179: 507-522. - Ghasemi, R. 1999. Phenological investigation of popular varieties in Karaj and Safrabasteh of Guilan. M.Sc. thesis, University of Tarbiat Modares, 171p (In Persian). - Girard, J.W. 1933. Volume tables of Mississippi bottomland hardwoods and southern pine. Journal of Forestry, 31: 34-41. - Gorjibahri, Y. 1992. The production of volume table of Euro-american poplar (I-214). Proceeding of Forest and Rangeland. Published by Research Institute of Forests and Rangelands, No:82 (In Persian). - Lee, W.K., Seo, J.H., Son, Y.M., Lee, K.H. and Gadow, K.V. 2003. Modeling stem profiles for Pinus densiflora in Korea. Forest Ecology and Management, 172: 69-77. - Lotfian, H. 1985. The report of poplar research plans and primary results. Proceeding of Importance of Poplar Conference. Published by Research Institute of Forests and Rangelands, pp: 276 (In Persian). - Mirabdollahi, M., Bonyad, A.E., Torkaman, J. and Bakhshandeh, B. 2011. Study on tree form of Oriental Beech (Fagus orientalis Lipsky) in different growth stages (Case study: Lomir forest). Iranian Journal of Forest, 3(3): 79-92 (In Persian). - Muhairwe, C.K. 1999. Taper equations for Eucalyptus pilularis and Eucalyptus grandis for the north coast in New South Wales Australia. Forest Ecology and Management, 113: 251-269. - Namiranian, M. 2005. An investigation of the ash species inventory at Gorazbon District in the educational and research forests of Kheiroodkenar. Iranian Journal of Natural Resources, 57(4): 689-702(In Persian). - Namiranian, M. 2006. Tree Measurement and Forest Biometry. University of Tehran Press, 574p (In Persian). - Naseri, M. 2009. Effective factors on economic justification of popular plantings in the north west of Iran. M.Sc. thesis, University of Tehran, 123p (In Persian). - Newnham, R.M. 1992. Variable-form taper functions for four Alberta tree species. Canadian Journal of Forest Research, 22: 210-223. - Prodan, R., Peters, R., Cox, F. and Real, P. 1997. Mensura Forestal. Agroamerica, 561p. - Rahimnezhad, S., Bonyad, A.A. and Fadaiee Khoshkebijary, F. 2006. Determination of the form factor equation for Pinus taeda L. (Loblolly pine) in the Guilan area (Case study: Lacan Rasht). Agriculture and Natural Resources Sciences Journal, 4(1): 54-76 (In Persian). - Saghebtalebi, Kh. 1987. The production of volume table of Euro-american poplar (I-488). Seminar for B.Sc. degree, University of Tehran (In Persian). - Singh, P. and Lodhiyal, L.S. 2009. Biomass and carbon allocation in 8-year-old poplar (Populus deltoides Marsh) plantation in Tarai agroforestry systems of central Himalaya, India. 2(6): 49-53. - Socha, J. 2002. A taper model for Norway Spruce (Picea abies (L.) Karst.). Electronic Journal of Polish Agricultural Universities, Forestry, 5(2): 132-143. - Swamy, S.L., Mishra, A. and Puri, A. 2006. Comparison of growth, biomass and nutrient distribution in five promising clones of Populus deltoides under an agrisilviculture system. Bioresource Technology, 97: 57-68. - Tanvir, M.A. and Siddiqui, M.T. 2010. Growth performance and cadmium (Cd) uptake by Populus deltoides as irrigated by urban waste water. Pakistan Journal of Agriculture Science, 47(3): 235-240. - Zobeiri, M. 2010. Forest Inventory. University of Tehran Press. Fifth edition, 401p (In Persian). | ||
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