رابطه بین زادآوری گونه‌های درختی و درختچه‌ای با عامل‌های محیطی در منطقه حفاظت‌شده دنای غربی (واحد پشت‌کره)

نوع مقاله : علمی- پژوهشی

نویسندگان

1 دانشیار، گروه جنگل‌داری و پژوهشکده منابع طبیعی و زیست‌محیطی، دانشکده کشاورزی و منابع طبیعی، دانشگاه یاسوج

2 دانشجوی کارشناسی ارشد جنگل‌داری، دانشکده کشاورزی و منابع طبیعی، دانشگاه یاسوج

چکیده

پژوهش پیش‌رو برای بررسی زادآوری گونه‌های درختی و درختچه‌ای و ارتباط آن با عامل‌های محیطی مختلف در منطقه حفاظت‌شده دنا انجام شد. پنجاه قطعه‌نمونه 450 متر مربعی به‌طور منظم-تصادفی با ابعاد شبکه 500 × 250 متر پیاده شدند. سپس زادآوری گونه‌های مختلف در سه طبقه ارتفاعی (کمتر از 30 ، 30 تا130 و بیشتر از 130 سانتی‌متر) شمارش شد. نتایج نشان داد که زادآوری گونه‌های مختلف تحت تأثیر عامل‌های محیطی مختلف قرار دارد و در بین عامل‌های فیزیوگرافیکی، ارتفاع بیشترین تأثیر را بر زادآوری دارد؛ به‌طوری‌که با افزایش ارتفاع از سطح دریا، زادآوری بلوط، دافنه و راناس کاهش یافت، اما زادآوری ارژن و شن افزایش یافت. همچنین زادآوری بلوط و راناس در جهت شمالی و شیب متوسط بیشتر بود. نتایج عامل‌های خاکی نیز نشان داد که میزان نیتروژن خاک ارتباط مثبت با زادآوری راناس و ارتباط منفی با زادآوری شن داشت. نتایج همبستگی بین گونه‌ها نیز نشان داد که اجتماعات گیاهی بلوط و راناس با یکدیگر در ارتفاع پایین، اما اجتماع گیاهی ارژن و شن با یکدیگر در ارتفاع بالا حضور داشتند. همچنین زادآوری گونه‌های بنه و بادامک نیز با یکدیگر انجام ‌شده است. با توجه به نتایج می‌توان دریافت که عامل‌های محیطی، انسانی و نیز رقابت گونه‌ها با یکدیگر می‌توانند بر فراوانی زادآوری گونه‌های مختلف جنگلی تأثیرگذار باشند.

کلیدواژه‌ها

عنوان مقاله [English]

Relation between natural regeneration of forest trees and shrubs species and environmental factors in protected area of western Dena (Posht kareh)

نویسندگان [English]

  • Roghayyeh Zolfaghari 1
  • Seyyed Moeinoddin Zamani 2
1 Associate Prof., Department of Forestry and Natural Resources and Environment Institute, Faculty of Agriculture and Natural Resources, Yasouj University
2 M.Sc. Student Forestry, Department of Forestry, Faculty of Agriculture and Natural Resources, Yasouj University
چکیده [English]

Concerning the importance of tree and shrub regeneration and its effect on the feature of forests, the present study was designed to evaluate the regeneration of forest species and its relationship with environmental factors in Dena protected area. To this aim, 50 plots of 450 m2 each were selected in a randomly- systematic design based on a 500 × 250 m grid. Then the regeneration of species in three different height classes (< 30 cm, 130-30 cm, and > 130 cm) was counted. The results showed that the regeneration of different species was affected by various environmental factors. Among the physiographic factors, height had the greatest impact on regeneration, i.e. increasing the height from sea level leads to reducing the regeneration of Quercus brantii, Cerasus microcarpa, and Daphne mucronata, Whereas Amygdalus reuteri and Lonicera nummulariifolia showedincrease ofregeneration. However, the regeneration of Q. brantii and C. microcarpawas was higher in medium slopes on northern aspects. The results of soil elements also showed positive correlation between that soil nitrogen levels were with C. microcarpa regeneration and negatively correlated between L. nummulariifolia and soil nitrogen levels. On the other hand the correlation results revealed that the association of Q. brantii and C. microcarpa occurs jointly in low altitudes, while association of A. reuteri and L. nummulariifolia jointly occurs across high altitudes. Also regenerations of Pistacia atlantica and A. scoparia were observed to be jointly, similar to those of A. orientalis and L. nummulariifolia. Finally, the anthropogenic and environmental factors as well as the competition between species are concluded to affect the regeneration of variety of forest species.

کلیدواژه‌ها [English]

  • Zagros forests
  • regeneration
  • edaphic factors
  • Physiographic factors

مراجع

- Aghaie, R., 2011. The ecological study of vegetation in Vezg forest. M.Sc. thesis, Faculty of Agriculture and Natural Resources, Yasouj University, Yasouj, 113p (In Persian).
- Arkhi, S., Heydari, M. and Mirzai, J., 2009. Regenerations tree and shrub species and influencing factors in Elam forest west Iran. The Third National Conference on Forest. Iran, 12-14 May. 2009: 1-13 (In Persian).
- Bremner, J.M., 1965. Total nitrogen: 1149-1178. In: Black, C.A., (Ed.). Methods of Soil Analysis. American Society of Agronomy, 1572p.
- Day, P.R., 1965. Particle fractionation and particle size analysis: 545-565. In: Black, C.A., (Ed.). Methods of Soil Analysis. American Society of Agronomy, 1572p.
- Fayyaz, P., Zolfaghari, R., Alvaninejad, S. and Aghaei, R., 2011. Relationship between physic-chemical soil with annual radial growth of Quercus brantii. The 12th Iranian Soil Science Congress, Tabriz, 3-5 Sep. 2011: 1-4 (In Persian).
- Hosseini, A., Moayeri, M.H. and Haidari H., 2008. Effect of elevation on natural regeneration and other characteristics of oak (Quercus brantii) in the Hyanans forest, Iilam. Journal of Agricultural Sciences and Natural Resources, 15(1): 1-10 (In Persian).
- Jackson, M.L., 1975. Soil Chemical Analysis: Advanced Course. University of Wiscon, College of Agriculture, Department of Soil, Madison, 930p.
- Jazirehi, M.H. and Ebrahimi Rostaghi, M., 2003. Silviculture in Zagros. University of Tehran Press, Tehran, 560p (In Persian).
- Mahdavi, A., Hydari, M. and Eshaghirad, J., 2010. Investigation on biodiversity and richness of plant species in relation to physiography and physico- chemical properties of soil in Kabirkoh protected area. Iranian Journal of Forest and Poplar Research, 3: 426-436 (In Persian).
- Marvi Mohajer, M.R., 2005. Silviculture. University of Tehran Press, Tehran, 387p (In Persian).
- Matinkhah, H., 1996. Study of regeneration in Yasuj forest. M.Sc. thesis, Faculty of Natural Resources, Tarbiat Modares University, Noor, 130p (In Persian).
- Mirzaei, J., Akbarinia, M., Hosseini, S.M., Tabari, M. and Jalali, S.Gh.A., 2006. Comparison of natural regenerated woody species in relation to physiographic and soil factors in Zagros forests (Case study: Arghavan reservoir in north of Ilam province). Pajouhesh and Sazandegi, 77: 16-23 (In Persian).
- Muys, B., 1995. The influence of tree species on humus quality and nutrient availability on a regional scale (Flanders, Belgium). Plant Soil, 168-169: 649-660.
- Najafifar, A., 2010. Sexual regeneration frequency of forest species in Zagros area in relation to different ecological factors in Ilam province. Iranian Journal of Forest and Poplar Research, 19(2): 279-290 (In Persian).
- Olsen, S.R., Cole, C.V., Watanabe, F.S. and Dean, L.A., 1954. Estimation of available Phosphorus in soil by extraction with Sodium Bicarbonate. U.S.A, Department of Agriculture, Washington, 939: 1-19.
- Owliaie, H.R., Adhami, E., Faraji, H. and Fayyaz, P., 2011. Influence of oak (Quercus brantii Lindl.) on selected soil properties of oak forests in Yasouj Region. Journal of Water and Soil Science, 15(56): 193-207 (In Persian).
- Richard, L.A., 1954. Diagnosis and Improvement of Saline and Alkali Soils. U.S.A Department of Agriculture, Washington, 160p.
- Shakeri, Z., Marvi Mohajer, M.R., Namiraninan, M. and Etemad, V., 2009. Comparison of seedling and coppice regeneration in pruned and undisturbed oak forests of northern Zagros (Case study: Baneh, Kurdistan province). Iranian Journal of Forest and Poplar Research, 17(1): 73-84 (In Persian).
- Stephanie, S.T. and Hedman, H., 2003. Effects of increased soil nitrogen on the dominance of alien annual plants in the Mojave Desert. Journal of Applied Ecology, 40: 344-353.

فایل ها

هم رسانی

ارجاع به این مقاله

آمار