همکاری با انجمن علمی مدیریت و کنترل مناطق بیابانی ایران

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد مرتعداری، گروه مرتعداری، دانشکده منابع طبیعی، دانشگاه تربیت مدرس، نور، ایران

2 دانشیار، گروه مرتعداری، دانشکده منابع طبیعی دانشگاه تربیت مدرس، نور، ایران

3 دانشیار، گروه محیط زیست، دانشکده منابع طبیعی و کویر شناسی دانشگاه یزد

چکیده

لاشبرگ (هوموس) حاصل از گیاهان بهترین عامل در امر حفاظت و پایداری خاک است که در اثر تجزیه، مواد معدنی و عناصر قابل دسترس گیاهان افزایش یافته و ضمن اصلاح کیفیت خاک، تولید و محصول گیاهی را افزایش می‌دهد. هدف از این تحقیق مطالعه و مقایسه کیفیت لاشبرگ زیراشکوب سه گونه بادام کوهی (Amygdalus scoparia)، دافنه (Daphne mezereum) و آبنوس (Ebenus stellata) با اندازه‌گیری خصوصیات شیمیایی (کربن، کلسیم، منیزیم، نیتروژن، فسفر، پتاسیم، هدایت الکتریکی و اسیدیته) در مراتع مروست از توابع استان یزد بود. بدین منظور در پایان فصل رویش، پس از بررسی‌های مقدماتی اقدام به شناسایی رویشگاه نموده و پس از انتخاب 15 سایت، نمونه‌برداری از لاشبرگ زیر اشکوب و بیرون از تاج پوشش انجام گرفت. سپس خصوصیات شیمیایی لاشبرگ در آزمایشگاه اندازه‌گیری شدند. جهت مقایسه ویژگی‌های لاشبرگ زیر اشکوب با یکدیگر و همچنین با لاشبرگ بیرون از اشکوب، از آزمون ANOVA و دانکن استفاده شد. نتایج بدست آمده نشان داد که لاشبرگ آبنوس و دافنه دارای بیشترین مقدار کلسیم، منیزیم و نیتروژن بود. همچنین نمونه‌های بیرون تاج پوشش هدایت الکتریکی بیشتری نسبت به زیر اشکوب هر سه گونه بوته ای داشتند. میزان فسفر لاشبرگ زیراشکوب در همه گونه‌ها و همچنین بیرون تاج پوشش یکسان بود. به طور کل، نتایج این تحقیق نشان داد که گونه‌های گیاهی مناطق خشک دارای ویژگی‌های متفاوت از حیث لاشبرگ زیراشکوب می‌باشند که بایستی در فعالیت‌های اصلاح و توسعه مد نظر قرار بگیرد.

کلیدواژه‌ها

عنوان مقاله [English]

Comparison of substratum litter quality between three shrub plants in Marvast, Yazd province, Iran

نویسندگان [English]

  • Moslem yazdani 1
  • Reza Erfanzadeh 2
  • Asghar Mosleh Arani 3

1 MSc. Student, Department of Rangeland Management, Faculty of Natural Resources, Tarbiat Modares University, Nur, Iran

2 Associate Professor., Department of Rangeland Management, Faculty of Natural Resources, Tarbiat Modares University, Nur, Iran

3 Associate Professor, Department of Environmental Engineering, Yazd University, Yazd, Iran

چکیده [English]

Plant litter is one of the best factors in the protection and stability of soil and by decomposition of litters, the percentage of organic matter could be increased which also improves the chemical properties of soil and plant production. The aim of this study was to compare the litter quality accumulated beneath three shrub species (Amygdalus scoparia, Ebenus stelata, Daphne mezerum) by measuring the soil chemical (carbon, calcium, magnesium, nitrogen, phosphorus, and potassium) and physical (Electrical conductivity and acidity) properties in Marvast rangelands, Yazd province, Iran. At the end of growth season, fifteen sites were selected and soil samples containing litter material was done randomly taken beneath and outside of the shrub canopy covers. Then, the chemical and physical characteristics of litter were measured in the laboratory. In order to compare the litter characteristics, one-way ANOVA were made between species and, between outside and beneath the shrubs. Mean comparisons were made using Duncan method. The results showed that the litter samples under E. stelata and D. mezerum shrubs had the highest values for calcium, magnesium and nitrogen contents. In contrast, the litter samples collected from outside shrubs had the highest values carbon content and electrical conductivity. The phosphorus contents between the species and
between under and outside shrub of litters were statistically equal. Generally, the results of this study showed that the woody species in dry regions had different capacity in litter quality and soil improvement. It should be considered in the activity of rangeland improvement and development.

کلیدواژه‌ها [English]

  • Amygdalus scoparia
  • Ebenus stelata
  • Daphne mezerum
  • nitrogen
  • potassium
  • carbon
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