بررسی میزان مقاومت و پالایندگی کلم زینتی به فلزهای سنگین در فرآیند مراحل رشد

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، دانشکده کشاورزی و منابع طبیعی، دانشگاه اراک، اراک

2 دانشجوی سابق کارشناسی ارشد، دانشکده کشاورزی و منابع طبیعی، دانشگاه اراک، اراک

چکیده

امروزه یکی از اصلی­ترین چالش‌ها در جهان، تجمع و سمیت فلزهای سنگین در محیط­‌زیست ناشی از زباله­ها، کودهای شیمیایی، گازهای تولیدی از صنایع، وسایل نقلیه و تولید فاضلاب­های صنعتی است. به­ تازگی پالایش این فلزها توسط گیاهان مورد توجه واقع شده است. این پژوهش در دو آزمایش به­صورت فاکتوریل در قالب طرح کامل تصادفی انجام گرفت. نخستین آزمایش شامل بررسی تأثیر کاربرد فلزهای سرب، روی و مس در غلظت­های 0، 20، 50، 100 و 200 میلی­گرم در لیتر در مرحلۀ جوانه­زنی کلم زینتی بود. در آزمایش دوم بررسی میزان مقاومت و پالایندگی کلم­ زینتی به سرب، روی و مس در غلظت­های 0، 25 و50 میلی­گرم در لیتر در شرایط گلخانه پرداخته شد. در آزمایش اول با افزایش غلظت فلزهای سنگین رشد در دانهال­های کلم زینتی کاهش یافت و بیشترین تأثیر بازدارندگی رشد در دانهال­ها به ترتیب در حضور فلز مس (50 میلی­گرم در لیتر)، سرب (100 میلی­گرم در لیتر) و روی (200 میلی­گرم در لیتر) مشاهده شد. در آزمایش گلخانه­ای بیشترین تأثیر سمیت در کلم زینتی در بستر بدون ورمی­کمپوست و در حضور فلز سرب بود. بیشترین جذب مس و سرب در بستر بدون ورمی­کمپوست به دست آمد. بنابراین کلم زینتی می­تواند به­عنوان یک گیاه فرا انباشت جدید به‌منظور بررسی‌های گیاه ­پالایی خاک­های آلوده به مس و سرب استفاده شد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Evaluation of tolerance and remediation of ornamental kale to heavy metals in the process of development

نویسندگان [English]

  • Mina Taghizadeh 1
  • Omid Sadeghi 2
1 Assistant Professor, Faculty of Agriculture & Natural Resources, Arak University, Arak, Iran
2 Former M. Sc. Student, Faculty of Agriculture & Natural Resources, Arak University, Arak, Iran
چکیده [English]

Todays, the accumulation and toxicity of heavy metals in the environment and food chain is one of the most major problems in the world. Recently, remediation of these metals have been considered by the plants. This study was performed in two experiments. Lead, zinc and copper concentrations 0, 20, 50, 100 and 200 mg/l was applied during seed germination of ornamental cabbage, in the first experiment. In the second experiment, tolerance and remediation of ornamental cabbage to lead, zinc and copper concentrations 0, 25, 50 mg/l were investigated at the greenhouse conditions. In the first experiment with increasing concentrations of heavy metals, growth of seedlings was decreased. The highest seedling growth inhibitory effect was observed in the presence of copper, lead and zinc, respectively. In greenhouse experiments, the highest growth and lowest toxicity were observed in the presence of Cu, Zn and Pb, respectively in the media contained vermicompost. Amount of Cu and Pb uptake was found more in the bed without vermicompost. The achieved results indicated that ornamental cabbage could be as new plant hyperaccumulator and has potential for use in the Phytoremediation study of Pb and Cu contaminated soils.

کلیدواژه‌ها [English]

  • Copper
  • germination
  • lead
  • Phytoremediation
  • vermicompost
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