تأثیر کمپوست پسماند شهری و لجن فاضلاب بر عملکرد و غلظت سرب، نیکل و کادمیم در خاک و گیاه دارویی سیاهدانه (Nigella sativa L.)

نوع مقاله : علمی - پژوهشی

نویسندگان

چکیده

به منظور بررسی اثر کمپوست پسماند شهری و لجن فاضلاب بر غلظت فلزات سنگین در خاک و گیاه دارویی سیاهدانه (Nigella sativa L.)، آزمایشی با دو نوع کود آلی کمپوست پسماند شهری و لجن فاضلاب هر کدام در سه سطح ( صفر، 15 و30 تن در هکتار) بصورت فاکتوریل در قالب طرح کاملاً تصادفی با سه تکرار در گلخانه دانشکده کشاورزی دانشگاه فردوسی مشهد انجام شد. نتایج نشان داد که اثر کمپوست پسماند شهری و لجن فاضلاب و اثر متقابل آنها تأثیر معنی داری بر وزن خشک گیاه در گلدان داشت. با افزایش مقادیر لجن فاضلاب، وزن خشک گیاه در گلدان افزایش یافت، اما کاربرد کمپوست پسماند شهری به مقدار 15 تن در هکتار، وزن خشک گیاه در گلدان را افزایش داد و کاربرد مقادیر بالای کمپوست (30 تن در هکتار) موجب کاهش وزن خشک گیاه در گلدان شد. تأثیر لجن فاضلاب و کمپوست بر غلظت عناصر سنگین (نیکل و سرب) در گیاه به جزء کادمیم معنی دار شد. کاربرد کمپوست پسماند شهری و لجن فاضلاب سبب افزایش سرب و نیکل قابل دسترس در خاک شد، اما بر فراهمی کادمیم خاک تأثیر معنی داری نداشت. نتایج نشان داد غلظت نیکل بیش از حد مجازاین عنصردر گیاه شد. بنابراین در استفاده از پسماندهای آلی برای گیاه دارویی سیاهدانه باید دقت لازم را به عمل آورد.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of municipal solid waste compost and sewage sludge on yield and heavy metal accumulation in soil and black cumin (Nigella sativa L.)

نویسندگان [English]

  • F. Akbarnejad
  • A.R. Astaraei
  • A. Fotovat
  • M. Nassiri Mahallati
چکیده [English]

In order to investigate the effect of municipal solid waste (MSw) compost and sewage sludge (SS) on yield and concentration of heavy metals in soil and black cumin (Nigella sativa L.) an experiment with MSW compost at 0, 15, 30 t.ha-1 (C0, C15 and C30) and sewage sludge at 0, 15, 30 t.ha-1 (S0, S15 and S30) in a factorial experiment based on completely randomized design with three replications was conducted in greenhouse of Faculty of Agriculture, Ferdowsi University of Mashhad, Iran. Results showed that MSW compost and SS had significant effects on plant dry matter. Increasing the amounts of SS increased dry matter of plant. But increasing MSW compost from 15 to 30 t.ha-1 was decreased in dry matter. The Effect of MSW compost and SS on concentration of heavy metals (Ni and Pb) in plant except Cd was significant. Addition of MSW compost and sewage sludge increased availability of Pb, Ni and Cd in soil. But effect of MSW compost and sewage sludge on Cd availability was not significant. Results showed that the amounts of Ni exceed the standard limits in dry matter. Therefore in use of organic wastes for medicinal plants we should be careful..

کلیدواژه‌ها [English]

  • Dry matter
  • Heavy metals
  • Organic wastes
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