تغییرات رویشی صنوبر (Populus nigra) در حاشیه رودخانه‌های استان کرمانشاه

نوع مقاله: علمی- پژوهشی

نویسندگان

1 دانشیار پژوهش، مرکز تحقیقات کشاورزی و منابع طبیعی مازندران

2 مربی پژوهش، مرکز تحقیقات کشاورزی و منابع طبیعی کرمانشاه

3 کارشناس‌ارشد، مرکز تحقیقات کشاورزی و منابع طبیعی کرمانشاه

چکیده

برای ارزیابی مقدار تولید چوب صنوبر در صنوبرکاری­های سنتی، محاسبه رویش سالانه این درختان ضروری است. در این پژوهش هشت توده صنوبرکاری از گونه Populus nigraدر مناطق مختلف حاشیه رودخانه‌های استان کرمانشاه انتخاب شدند. صدودو قطعه‌نمونه با مساحت متغیر به­صورت منظم- تصادفی تعیین شد و اندازه‌گیری­ صفات رویشی قطر و ارتفاع در آنها انجام شد. داده ­های به­ دست‌آمده با روش آماری تجزیه‌واریانس یک­طرفه مورد بررسی و مقایسه میانگین­ ها قرار گرفتند. ویژگی­های فیزیکی و شیمیایی خاک توده­ ها نیز اندازه‌گیری شد. بررسی همبستگی متغیرهای خاک نیز با استفاده از تجزیه به­ مؤلفه­ های اصلی انجام شد. نتایج نشان داد که ازنظر رویش حجمی، توده شماره شش با 38 مترمکعب در سال و در هکتار بهترین عملکرد و توده شماره چهار با 10/3 مترمکعب در سال و در هکتار کمترین رویش را داشتند. تفاوت در مقادیر رویش قطری و ارتفاعی توده ­ها نیز مشاهده شد. با بررسی ویژگی‌های خاک توده‌ها مشخص شد که گرچه ارتباط معنی­ داری بین رویش و ویژگی‌های خاک وجود ندارد، اما براساس نتایج به­ دست­ آمده از تجزیه به مؤلفه­ های اصلی، تفاوت معنی­ داری بین آنها مشاهده می­شود. برای مثال از یک­سو با کاهش مقادیر EC و و از سوی دیگر با افزایش مقادیر رس، ازت و کربن آلی شرایط رویش بهتر شده است. همچنین به­ دلیل فقدان تنوع ژنتیکی بین درختان مورد مطالعه، تأثیر عمیق­تر روش­های کاشت و داشت (عملیات مدیریتی) در تولید چوب صنوبر نسبت به مؤلفه­ های ژنتیکی و ادافیکی مشخص شد.

کلیدواژه‌ها


عنوان مقاله [English]

Growth variations in poplar (Populus nigra L.) plantations in riverbanks of Kermanshah Province

نویسندگان [English]

  • Farhad Asadi 1
  • Fath Ali Noori 2
  • Borzou Yousefi 3
1 Associate Prof., Research Division of Natural Resources, Mazandaran Agricultural and Natural Resources Research Center, AREEO, Sari, Iran
2 Senior Research Expert, Research Division of Natural Resources, Kermanshah Agricultural and Natural Resources Research Center, AREEO, Kermanshah, Iran
3 Research Expert, Research Division of Natural Resources, Kermanshah Agricultural and Natural Resources Research Center, AREEO, Kermanshah, Iran
چکیده [English]

In order to evaluate the amount of poplar wood production in traditional poplar farming, an assessment of annual growth in different stands is necessary. In this study 8 Populus nigra stands along margins of different rivers of Kermanshah province were selected for the analysis. A number of 102 variable sample plots were measured by in a systematic random design. In each sample plot growth attributes were measured. The data was analyzed by one-way analysis of variance and Duncan test. In addition, soil samples were measured and the soil data were analyzed by correlation and PCA analysis. Results showed that the annual growth of 6th stand was three times higher than that of 4th stand, with their cumulated annual ranging between 10.3-38 m3. Furthermore, differences were observed in volume, height and diameter growth amongst the stands. Furthermore, differences were observed in volume, height and diameter growth amongst the stands. The conducted PCA analysis of soil samples showed a marginal significant difference amongst the samples, though no significant correlation between volume growth and soil characteristics was observed. For example decreasing EC and pH improved the volume growth, whereas increasing Clay, N and OC budget led to an increase in volume growth. Compared to the previously achieved results in the literature, the amount of poplar growth seems to be rather a function of management operations in farm rather than the genetic and edaphic attributes.

کلیدواژه‌ها [English]

  • Poplar stands
  • growth variation
  • wood production
  • Kermanshah
- Alba, N., 1998. Standardized list of descriptors for inventories of Populus nigra stand. Populus nigra Network: 39-41. Report of the fourth meeting, 3-5 October 1997. Gerardsbergen, Belgium, IPGRI, Rome.

- Alimohammadi, A., Asadi, F. and Aghdaei, R.T., 2012. Genetic diversity in Populus nigra plantations from west of Iran. Annals of Forest Research, 56(1): 165-178.

- Bagheri, R., Ghasemi, R., Calagari, M. and Merikh, F., 2013. Effect of irrigation interval on superior poplar clones yield. Iranian Journal of Forest and Poplar, 49(3): 357-369.

- Calderon, A., Bustamante, J., Riu, N., Pérez, S. and Zanetti, P., 2012. Behavior of clones of  Populus spp., in Lavalle, Mendosa, Argentina.  24th Session of International Poplar Commission, 30 Oct-Nov 2012, India, Dehradun, 228p.

- Gagnon, D., Fortier, J., Truax, B. and Lambert, F., 2012. High yield and carbon storage in 9-year-old hybrid poplar riparian buffers in south-eastern Canada. 24th Session of International Poplar Commission, 30 Oct-Nov 2012, India, Dehradun, 228p.

- Hemmati, A. and Modir-Rahmati, A.R., 2002.  Results of adaptation trial for high yielding poplar clones in west of Kermanshah's paper industries. Iranian Journal of Forest and Poplar, 8: 59-86 (In Persian).

- Hemmati, A. and Modir-Rahmati, A.R., 2005. Effects of spacing on yield of various clones of Populus nigra (L.). Iranian Journal of Forest and Poplar, 13: 343-352 (In Persian).

- Imbert, E. and Lefevre, F., 2003. Dispersal and gene flow of Populus nigra (Salicaceae) along a dynamic river system. Journal of Ecology, 91(3): 447-456.

- Ivanisevic, P., Galic, Z., Pekec, S., Kovacevic, B., Roncevic, S. and Andrasev, S., 2012. The Effect of habitat properties and management technology on black poplar biomass production in Serbia. 24th Session of International Poplar Commission, 30 Oct-Nov 2012, India, Dehradun, 228p.

- Kohan, S., 1999. Growth and production of poplar I-214 intensively bred in special cultures on non-flooded alluvia of the Danub. Zpravy- Lesnickeho- Vyzkumu, 44(1): 27-30.

- Noori, F., Asadi, F. and Modirrahmati, A.R., 2010. Growth and wood production of 10 poplar clones (Populus nigra) at the second harvesting period in Kermanshah. Iranian Journal of Forest and Poplar Research, 17(4): 534-543 (In Persian).

- Rowland, D.L., Biagini, B. and Evans, A.S., 2000. Variability among five riparian cottonwood (Populus fremontii Wats.) populations: An examination of size, density, and spatial distribution. Western North American Naturalist, 60(4): 384-393.

- Salari, A., 1997. Investigation of compatibility of different poplar clones in Urmia climatic condition. Final Report of Research Project, West-Azerbaijan Agricultural and Natural Resources Research Center, Urmia, 56p (In Persian).

- Soheili, E.S., Fallah, A., Pourmajidian, M. and Hesami, S.M., 2008. The study of growth characteristics of Lombardy & Common (Shirazi) Poplar species in manually-planted stacks in west of Esfahan province. Second National Congress on Poplar and Potential Use in Poplar Plantations. Research Institute of Forests and Rangelands, Tehran, 5-7 May 2008, 509p (In Persian).

- Zakhariev, B., Iliev, S. and Miter, T., 1975. Growth and productivity of some hybrid black poplar clones in Bulgaria on sites close to rivers and dry site away from rivers. Gorskostopanska Nauka, 12(2): 16-22.

- Zobeiri, M., 1994. Forest Inventory (Measurement of Tree and Stand). University of Tehran Press, Tehran 401p (In Persian).

 

 


دوره 23، شماره 2
تابستان 1394
صفحه 209-221