تاثیر کادمیوم بر غلظت عناصر مس، آهن، منگنز و روی در اندام هوایی ارقام مختلف گندم

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی سابق کارشناسی ارشد، گروه علوم و مهندسی خاک، دانشکدۀ مهندسی و فناوری کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران

2 دانشیار گروه علوم و مهندسی خاک، دانشکدۀ مهندسی و فناوری کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران

چکیده

هدف پژوهش حاضر، بررسی میانگین غلظت ریزمغذی‌ها شامل مس، آهن، منگنز و روی در اندام هوایی ارقام مختلف گندم نان (Triticumaestivum) در مرحلۀ به ساقه رفتن در خاک آلوده به کادمیوم بود. تیمار‌های آزمایش به‌ترتیب شامل سه سطح کادمیوم صفر (تیمار شاهد (Cd0)، 40 (Cd40) و 80 (Cd80) میلی‌گرم کادمیوم در کیلوگرم خاک) و 14 رقم گندم (‘بهار’، ‘نیک‎نژاد’، ‘مرودشت’، ‘پارسی’، ‘سیوند’، ‘شیراز’، ‘روشن’، ‘پیشتاز’، ‘آزادی’، ‘شهریار’، ‘پیشگام’، ‘امید’، ‘لوند’ و ‘نوید’) بود. تأثیر کادمیوم بر غلظت ریزمغذی‌ها در سطح 1 درصد معنادار بود. با افزایش سطح کادمیوم، غلظت مس در اندام هوایی همۀ ارقام کاهش یافت. به‌جز دو رقم ‘پیشگام’ و ‘امید’ که در تیمار Cd40 نسبت به تیمار شاهد افزایش غلظت آهن را نشان دادند، غلظت آهن در ارقام دیگر کاهش یافت. بیشترین و کمترین غلظت کادمیوم در تیمار Cd40 به‌ترتیب برای دو رقم ‘نیک‌نژاد’ (7 میلی‌گرم کادمیوم در کیلوگرم وزن خشک) و ‘پارسی’ (دو میلی‌گرم کادمیوم در کیلوگرم وزن خشک) ثبت شد. همچنین بیشترین و کمترین غلظت کادمیوم در تیمار Cd80 به‌ترتیب در ارقام ‘پیشگام’ (20 میلی‌گرم کادمیوم در کیلوگرم وزن خشک) و ‘نوید’ (6 میلی‌گرم کادمیوم در کیلوگرم وزن خشک) مشاهده شد. درمجموع دو رقم ‘نیک‌نژاد’ و ‘پیشگام’ بیشترین قابلیت برداشت کادمیوم را داشتند، همچنین کمترین قابلیت برداشت کادمیوم در دو رقم ‘پارسی’ و ‘نوید’ مشاهده شد.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of cadmium on concentration of copper, iron, manganese and zinc in shoot of different cultivars of wheat

نویسندگان [English]

  • Iman Javad-zarrin 1
  • Babak Moteshare zade 2
1 Former M.Sc. Student, Department of Soil Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.
2 Associate Professor, Department of Soil Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
چکیده [English]

The aim of this research was to evaluate the average concentrations of micronutrients including: Copper (Cu), Iron (Fe), Manganese (Mn) and Zinc (Zn) in the shoots of different cultivars of wheat in stem elongation stage in a soil contaminated with cadmium (Cd). The treatments consisted of three levels of Cd (0 (as control, Cd0), 40 (Cd40) and 80 (Cd80) mg Cd/kg soil) and fourteen different cultivars of wheat (‘Bahar’, ‘Alvand’, ‘Niknezhad’, ‘Pishtaz’, ‘Azadi’, ‘Shahriyar’, ‘Pishgam’, ‘Marvdasht’, ‘Parsi’, ‘Sivand’, ‘Shiraz’, ‘Omid’, ‘Roshan’ and ‘Navid’), respectively. The results showed the effect of Cd on concentrations of micronutrients were highly significant. Cu concentration was decreased in shoot of all studied cultivars, as levels of Cd were increased. Except two cultivars (‘Pishgam’ and ‘Omid’) which showed an increase in Fe concentration in Cd40 comparing with control, Fe concentration was decreased in other cultivars. Most and least Cd concentration in Cd40 was recorded by Niknezhad (7 mg/kg DW) and Parsi (2 mg/kg DW), respectively. Also, most and least Cd concentration in Cd80 was observed in ‘Pishgam’ (20 mg/kg DW) and ‘Navid’ (6 mg/kg DW). Generally, ‘Niknezhad’ and ‘Pishgam’ had the highest reliability of cadmium uptake. Also the lowest reliability of cadmium uptake was observed about ‘Parsi’ and ‘Navid’.

کلیدواژه‌ها [English]

  • Food safety
  • Heavy metals
  • micronutrients
  • toxicity
 

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