مقایسه رشد و موفقیت کاج الدار (Pinus eldarica Medw.) در توده‌های خالص و مخلوط با اکالیپتوس (Eucalyptus camadulensis Dehnh.) در جنگلکاری‌های پارک شهید پایدار اردکان

نوع مقاله: علمی- پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد جنگل‌داری، دانشکده منابع طبیعی

2 استادیار، گروه جنگل‌داری، دانشکده منابع طبیعی، دانشگاه یزد

3 استادیار، گروه مدیریت بیابان، دانشکده منابع طبیعی، دانشگاه یزد

چکیده

در پژوهش پیش‌رو درختان کاج الدار (Pinus eldarica Medw.) در توده‌های خالص (با دو تراکم) و مخلوط با اکالیپتوس (Eucalyptus camadulensis Dehnh.)ازنظر رویش، ابعاد و وضعیت کیفی بررسی و مقایسه شدند. بدین‌منظور نمونه‌برداری به‌روش منظم- تصادفی انجام شد و مشخصات کمی توده سرپا شامل قطر برابر سینه، ارتفاع و قطر تاج به‌همراه صفات کیفی ازجمله دوشاخگی، پوسیدگی و پیچیدگی تنه اندازه‌گیری و ثبت شدند و براساس آنها ضریب پایداری، سطح مقطع در ارتفاع برابر سینه، حجم و رویش مشخصات کمی محاسبه شد. برای تجزیه و تحلیل داده‌ها از آزمون تجزیه واریانس و برای مقایسه میانگین‌ها از آزمون دانکن استفاده شد. نتایج نشان داد که ازنظر تمام صفات به‌استثنای ارتفاع کل و رویش ارتفاعی، اختلاف معنی‌داری بین توده‌ها وجود داشت. بر این اساس، توده مخلوط نسبت به دو توده خالص ازنظر مقادیر مشخصات کمی برتر بود. میزان پایداری، قطر و رویش قطری، حجم و رویش حجمی، رویه زمینی و رویش آن و سطح تاج در این توده بیشتر بود و تنها ازنظر میانگین رویش ارتفاعی و ارتفاع کل اختلاف وجود نداشت. ازنظر ارتفاع تنه نیز توده خالص و متراکم کاج بیشترین هرس طبیعی و تنه بدون شاخه را داشت. بیشترین پیچیدگی تنه و دوشاخگی در توده مخلوط و بیشترین پوسیدگی در توده خالص و متراکم مشاهده شد. به‌طور کلی کاشت این گونه به‌طور مخلوط ارجحیت دارد که به‌دلیل استفاده بهتر از ظرفیت رویشگاه است و ازنظر زیبایی‌شناختی و محیط ‌زیستی نیز مورد تأیید است.

کلیدواژه‌ها


عنوان مقاله [English]

Comparing growth and success of Eldarican pine (Pinus eldarica Medw.) in pure and mixed stands with river red gum (Eucalyptus camadulensis Dehnh.) in Shahid-Paidar Park, Ardakan

نویسندگان [English]

  • Fa'zehsadat Khalife Soltanian 1
  • Bahman Kiani 2
  • Mohammad Hoseyn Hakimi Meybodi 3
  • Afagh Tabande Saravi 2
1 M.Sc. Student Forestry, Faculty of Natural Resources, Yazd University
2 Assistant Prof., Department of Forestry, Faculty of Natural Resources, Yazd University
3 Assistant Prof., Department of Forestry, Faculty of Natural Resources, Yazd University
چکیده [English]

In this research, Eldarican pine (Pinus eldarica Medw.) pure stands with two densities were sampled along with a mixed stand with river red gum (Eucalyptus camaldulensis Dehnh.) in a systematic randomized design. Quantitative traits of trees including diameter at breast height (dbh), height and crown diameters were measured, followed by calculating the basal area, volume, stability index, crown area and annual increment of quantitative variables. In addition, qualitative traits including forking, twisting and trunk decay were also recorded for each tree. Analysis of variance (ANOVA) and Duncan tests were applied to analyze data and compare groups. Results indicated a significant difference between stands for all traits except for height and mean height increment. Furthermore, the mixed stand was superior in dbh and its mean annual increment, basal area and its increment, volume and its increment, stability and crown area. Branchless trunk of trees was significantly longer in pure dense stand compared to the others. Most forking and twisting was seen in mixed stand, yet the highest decay was observed for the pure dense stand. Finally, the study concluded that a mixed scenario should be preferred for Eldarican pine due to its better usage of the site capacity, in particular by owing to the fact that mixed stands are considered to be of more sustainability from an environmental and landscape management perspective.

کلیدواژه‌ها [English]

  • afforestation
  • Eldarican pine
  • increment
  • mixture
  • planting space
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