ارتباط پراکنش رویشگاه‌های گازرخ، پیر، و کلیر با شرایط ادافیکی به روش آنالیز تطابق کانونیک

نوع مقاله: مقاله پژوهشی

نویسندگان

1 استادیار، مؤسسة تحقیقات جنگل‌ها و مراتع کشور، تهران، ایران

2 مربی پژوهشی، مرکز تحقیقات کشاورزی و منابع طبیعی هرمزگان، بندرعباس، ایران

چکیده

گونه‌های گازرخ، پیر، و کلیر از عناصر درختی و درختچه‌ای ناحیة اقلیمی صحارا‌ـ سندی و حوزة نوبوسندین‌اند که سطوح وسیعی را در جنوب‌شرق ایران به صورت درختزارهای پراکنده پوشش می‌دهند. جهت بررسی رابطة بین عوامل خاکی با پراکنش آن‌ها، در گام نخست، نقشة پراکنش این گونه‌ها در محدودة جنوب‌شرق ایران با استفاده از تصاویر ماهواره‌ای، نقشه‌های توپوگرافی، و پیمایش زمینی تهیه و محدودة رویشگاهی هر گونه مشخص شد. در بیست و هفت رویشگاه منتخب 90 پروفیل حفر و از عمق 0 تا 60 سانتی‌متری نمونة خاک تهیه شد. در آزمایشگاه خاک‌شناسی خصوصیات فیزیکی (بافت، درصد شن، درصد رس، درصد لیمون) و خصوصیات شیمیایی (اسیدیتة گل اشباع، هدایت الکتریکی، پتاسیم، فسفر، ازت، آهک، گچ، و مواد محلول خاک) تعیین شد. جهت مشخص‌شدن مؤثرترین عوامل از روش چندمتغیره، از جمله روش آنالیز تطابق کانونیک (CCA)، بهره ‌گرفته شد. نتایج نشان داد بین رویشگاه‌های سه گونه فقط از نظر هدایت الکتریکی، درصد ازت، و میزان گچ تفاوت معنا‌دار وجود دارد. نتایج آنالیز CCA نشان داد مهم‌ترین مشخصه‌های ادافیکی مؤثر در پراکنش گونة گازرخ درصد آهک و درصد رس، در گونة پیر خصوصیات آهک و نمک‌های محلول و درصد شن، و در گونة کلیر مقدار آهک و نمک‌های محلول خاک‌اند.

کلیدواژه‌ها


عنوان مقاله [English]

Relationship Between Moringa peregrina, Salvadora oleiodes and Cappparis decidua Habitats and Soil Characteristics in Sistan & Balochestan Province by CCA Method

نویسندگان [English]

  • Hashem Keneshloo 1
  • gholam reza damizadeh 2
1 Assistant Professor, Research Institute of Forests and Rangelands, Tehran, I.R. Iran
2 Senior Research expert, Agriculture and Natural Resources Research center of Hormozgan, Bandarabas, I.R. Iran
چکیده [English]

Moringa pregerina (Forssk.) Fiori.,Capparis decidua (Forssk.) Edgew. and Salvadora oleides Decne. are important indegenious shrub or tree species of Sahara-Sindian region which distributed and formed scattered woodlands in south east of Iran. The current research was carried out to find most effective soil characteristics intheir distribiution. For this purpose, a study was conducted in the Balochestan province of southeast Iran in 2008 for four years. Based on a vegetation map and field surveys, indicator sites were identified. Within each site, 1-3 profiles were dug. Soil sample was taken from 0-60 cm. Measured soil properties included: pH, EC, K, P, N, sand, silt, clay, T.N.V, gypsum, T.D.S. and texture. To determine the most soil effective factors on plants, multivariate techniques, including Canonical Correspondence Analysis (CCA) was applied. The results indicated that between three species habitates, only there are significant differences in nitrogen percent, gypsium and electrical conductivity. The CCA results indicated that the main edaphically factors affecting the distribution of Moringa pregerina are total neutralizing value (T.N.V) and clay percentage, and for Salvadora oleides, total neutralizing value(T.N.V), total dissolved solid (T.D.S.) and sand percentage are effective factors and total neutralizing value(T.N.V) and total dissolved solid(T.D.S) characters play important roles in Capparis decidua presence

کلیدواژه‌ها [English]

  • Capparis decidua
  • CCA method
  • Moringa peregrina
  • presence
  • Sahara-Sindian
  • Salvadora oleoides
 

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