ارتباط گونه‌های همی‌کریپتوفیت مقاوم به ترکیبات نمکی متناسب با عوامل ادافیکی در بیابان‌های همجوار خلیج فارس

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد بیابانزدایی دانشگاه هرمزگان، هرمزگان، ایران

2 استادیار گروه منابع طبیعی دانشکده کشاورزی و منابع طبیعی دانشگاه هرمزگان، هرمزگان، ایران

3 گروه آموزشی منابع طبیعی، دانشکده کشاورزی و منابع طبیعی، دانشگاه هرمزگان، بندرعباس، ایران

چکیده

تغییرات ترکیبات مختلف املاح دار در عوامل ادافیکی، توزیع مکانی گونه‌های گیاهی به‌ویژه همی‌کریپتوفیت‌ها را تحت تأثیر خود قرار می‌دهد. به نظر می‌رسد این تغییرات در مناطق بیابانی که همجوار دریا نیز هستند با تغییرات بیابان‌های دیگر متفاوت است. این پژوهش با هدف بررسی توزیع مکانی گونه‌های همی‌کریپتوفیت با عوامل ادافیکی انجام شد. نمونه‌برداری پوشش گیاهی به‌صورت تصادفی – سیستماتیک و به روش ترانسکت پلات (جمعاً 150 پلات 1، 2 و 4 مترمربعی) و نمونه‏برداری خاک از عمق 0-45 و 45-90 انجام و در آزمایشگاه ویژگی‌های خاک اندازه‌گیری شد. آنالیز محاسبه ضریب همبستگی بین صفات مختلف پوشش گیاهی (درصد پوشش، ارتفاع و تراکم) با ویژگی‌های خاک رویشگاه‌ها نشان داد که این پارامترهای گیاهی با اسیدیته، بافت و مجموع کلسیم و منیزیم بیشترین همبستگی را دارند. آنالیز مؤلفه‌های اصلی (P.C.A) نشان داد به‌طورکلی، در این منطقه عامل تراکم گیاهی با ویژگی‏ها کلسیم و منیزیم عمق دوم، بیش­ترین ارتباط را داشته و سایر ویژگی‏ها پوشش گیاهی با مقدار سدیم، پتاسیم و هدایت الکتریکی عمق اول و منیزیم و کلسیم عمق دوم لایه‌های خاک دارای ارتباط مستقیم بوده‌اند.

کلیدواژه‌ها


عنوان مقاله [English]

Association of salt-resistant hemicryptophyte species in proportion to edaphic factors in coastal desert near Persian gulf

نویسندگان [English]

  • alireza Jamshidi 1
  • Navazollah Moradi 2
  • Marzieh Rezai 3
1 Natural Resources engineering group, Faculty of Agriculture and Natural Resources, University of Hormozgan,
2 Assistant Professor, Natural Resources engineering group, Faculty of Agriculture and Natural Resources, University of Hormozgan, Hormozgan, Iran.
3 Department of Natural Resources, Faculty of Agriculture and Natural Resources, Hormozgan University, Bandar Abbas, Iran
چکیده [English]

Changes in different solute compounds in edaphic factors affect the spatial distribution of plant species, especially hemicryptophytes.Soil salinity is one of the most common desertification factors in arid and semi-arid regions that contributes to the degradation of the soils of regions susceptible to desertification and eventually leads to a decreased soil ecological potential which is considered as one of the most significant factors that intensifies desertification. In order to explore the impact of principal components of soil on the diversity of plant types in the forest regions scattered along the coastal belt of the Persian Gulf and Oman Sea, current research was conducted on saline soils in Hasan Langi Village. Analysis of correlation coefficient between different traits of the plants in the respective vegetation (percentage of coverage, height and density and diversity) and the soil parameters of the habitats indicated that these vegetative parameters were mostly correlated with acidity, texture, and total calcium and magnesium. Principal component analysis (PCA) demonstrated that components 1 and 2 explained a total of 85% variance suggesting the largest impact of soil factors on differentiation of vegetation. In total, the factor of diversity was most correlated with calcium and magnesium in the second depth while other vegetative characteristics were directly correlated with the amount of sodium and potassium as well as electrical conduction in the first depth and the amount of calcium in the second depth.

کلیدواژه‌ها [English]

  • Plant types
  • halophytes
  • principal components
  • soil
  • lithosphere
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