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طاهره منصوری احمد گلچین محمد بابااکبری سا ری

چکیده

آلودگی خاک و آب¬های زیرزمینی توسط آرسنیک رو به گسترش و نگران¬کننده است و سبب ورود آن به بخش¬های مختلف گیاهان می¬شود. به¬دلیل نقش بسیار مهم ذرت در تغذیه انسان، بررسی نحوه جذب، انتقال و تجمع آرسنیک در بخش¬های مختلف این گیاه بسیار مهم است و پژوهش حاضر با هدف ارزیابی پاسخ ذرت به وجود آرسنیک در محیط رشد و تاثیر آرسنیک بر غلظت فسفر، آهن، روی و منگنز در این گیاه انجام شد. بدین منظور یک آزمایش در قالب طرح کاملا تصادفی با 6 سطح عنصر آرسنیک (0، 6، 12، 24، 48 و 96 میلی¬گرم در کیلوگرم خاک) با 3 تکرار در گلخانه اجرا شد. نتایج نشان داد که با افزایش غلظت کل آرسنیک در خاک، غلظت آرسنیک قابل جذب خاک و غلظت آرسنیک ریشه و بخش هوایی ذرت افزایش و رشد آن کاهش یافت. بیشترین غلظت آرسنیک ریشه و بخش هوایی به¬ترتیب 4/383 و 56/59 میلی¬گرم در کیلوگرم بود که سبب کاهش وزن خشک این اندام¬ها به‌ترتیب به مقادیر 94/95 و 22/95 درصد شد. افزایش غلظت آرسنیک خاک سبب افزایش غلظت فسفر و کاهش غلظت آهن، روی و منگنز قابل جذب خاک، افزایش غلظت فسفر ریشه و کاهش غلظت آن در بخش هوایی شد، همچنین سبب کاهش غلظت آهن و روی و افزایش غلظت منگنز ریشه و بخش هوایی گیاه شد.

جزئیات مقاله

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ارجاع به مقاله
منصوریط., گلچینا., & بابااکبری سا ریم. (2016). تأثیر آرسنیک بر غلظت های فسفر، آهن، روی و منگنز در خاک و گیاه ذرت. آب و خاک, 31(2), 627-643. https://doi.org/10.22067/jsw.v31i2.55951
نوع مقاله
علمی - پژوهشی