ویژگی‌های فیزیکی و شیمیایی خاک رویشگاه‌های گز پرشاخه (Tamarix ramosissima Ledeb) در استان ایلام

نوع مقاله: علمی- پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد جنگل‌داری، گروه علوم جنگل، دانشکده کشاورزی، دانشگاه ایلام، ایلام، ‌ایران

2 استادیار گروه علوم جنگل، دانشکده کشاورزی، دانشگاه ایلام، ایلام،‌ ایران

3 استادیار گروه جنگل‌داری، دانشکده محیط زیست و منابع طبیعی، دانشگاه صنعتی خاتم‌الانبیاء بهبهان، بهبهان، ایران

چکیده

این پژوهش به‌منظور مطالعه نیاز رویشگاهی درختان گز پرشاخه (Tamarix ramosissima Ledeb.) در استان ایلام انجام شد. در ابتدا رویشگاه­‌هایی که گز گونه غالب آن‌ها بود، شناسایی شدند که شامل رویشگاه­‌های ظهیری، دار­بلوط، چم­‌جنگل، پل­ سیمره، بانروشان، گلان و کنجانچم بودند. سپس، در هر رویشگاه پنج نمونه خاک از عمق صفر تا 30 سانتی‌­متری به روش کاملاً تصادفی برداشت شد و متغیرهای فیزیکی- شیمیایی خاک شامل بافت، اسیدیته، هدایت الکتریکی، ماده آلی، ازت کل، فسفر، پتاسیم، رطوبت و جرم مخصوص اندازه­‌گیری شدند. نتایج نشان داد که این گونه در شوری بین 0/92 تا 9/03 دسی‌زیمنس بر متر، اسیدیته بین 6/98 تا 7/99، کربن آلی بین 0/09 تا 3/39 درصد، ازت کل بین صفر تا 0/29 درصد، فسفر قابل جذب بین 17/17 تا 23/14 (ppm)، پتاسیم بین 2/35 تا 402/35 (ppm) و رطوبت وزنی خاک بین 0/06 تا 30/56 درصد رویش دارد. نتایج تجزیه واریانس نشان داد که از نظر درصد شن، سیلت و رس، رطوبت وزنی خاک، هدایت الکتریکی، اسیدیته، فسفر، پتاسیم، ازت کل و کربن آلی در رویشگاه­‌های مختلف تفاوت معنی­‌داری وجود داشت. تجزیه و تحلیل مؤلفه­‌های اصلی و تحلیل دوطرفه TWINSPAN نیز نشان داد که فاصله از رودخانه، درصد کربن آلی، هدایت الکتریکی خاک، رطوب خاک، فسفر قابل جذب و درصد سیلت مهم‌ترین عامل‌های مؤثر بر استقرار و پراکنش این گونه بودند.

کلیدواژه‌ها


عنوان مقاله [English]

Soil physicochemical properties of Tamarisk (Tamarix ramosissima Ledeb.) sites in Ilam province

نویسندگان [English]

  • Maryam Mohammadi 1
  • Javad Mirzaei 2
  • Mostafa Moradi 3
  • Hamid Reza Naji 2
1 M.Sc. Student, Department of Forest Science, Faculty of Agriculture, Ilam University, Ilam, Iran
2 Assistant Prof., Department of Forest Science, Faculty of Agriculture, Ilam University, Ilam, Iran
3 Assistant Prof., Department of Forestry, Faculty of Environment and Natural Resources, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran
چکیده [English]

This research was conducted to study the site demands of Tamarisk (Tamarix romosissima Ledeb.) in Ilam province. At first the sites that tamarisk was dominat, including Zoheiri, Darbalut, Cham jangal, Pol-e Saymereh, Banroshan, Golan and Konjancham regions were recognizes. In each selected site, five soil samples were taken randomly from the depth of 0-30 cm and soil physicochemical properties including pH, electrical conductivity, organic carbon, total nitrogen, phosphorus, potassium, texture, moisture, bulk density and particle density were determined. Our results indicated that T. romosissima can tolerate 0.92 to 9.03 ds/m salinity, pH between 6.9 and 8.0, organic carbon between 0.09 and 3.39%, total nitrogen between 0 and 0,29%, phosphorus between 17.17 and 23.14 ppm, potassium between 2,35 and 402.35 ppm and soil moisture between 0.06 and 30,56%. One-way ANOVA results revealed that sand, silt, clay, moisture, electrical conductivity, pH, phosphorus, potassium, total nitrogen, and organic carbon were significantly different in the studied sites. The principal component analysis and TWINSPAN results revealed that distances from river, organic carbon content, electrical conductivity, soil moisture, phosphorus and silt are among the most important factors affecting the presence and distribution of T. romosissima.

کلیدواژه‌ها [English]

  • environmental factors
  • Principle Component Analysis
  • saline regions
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