ویژگی‌های رویشی و جذب عناصر غذایی و فلزات سنگین نهال‌های دوسالۀ سه کلن صنوبر تبریزی در خاک متأثر از آب نامتعارف

نوع مقاله : مقاله پژوهشی

نویسندگان

موسسه تحقیقات جنگلها و مراتع کشور، تهران، ایران

چکیده

با هدف بررسی تأثیر آبیاری با آب‌های نامتعارف بر عملکرد نهال‌های دوسالۀ سه کلن صنوبر تبریزی، آزمایشی گلدانی به‌صورت فاکتوریل در قالب طرح کاملاً تصادفی با دو فاکتور 1. خاک متأثر از نوع آب آبیاری در دو سطح؛ و 2. کلن صنوبر در سه سطح انجام گرفت. پس از دو فصل رویش، تیمار خاک متأثر از آب نامتعارف، افزایش معنی‌دار (01/0≥ P) ویژگی‌های رویشی (قطر و طول ساقه، سطح برگ و زی‌تودۀ خشک ریشه، ساقه، برگ و کل گیاه)، جذب و تجمع عناصر غذایی اصلی (نیتروژن، فسفر و پتاسیم) و کم‌مصرف (آهن، روی، مس و منگنز) و همچنین فلزات سنگین (نیکل، کروم و سرب) در اندام‌های گیاهی نهال‌های دوسالۀ سه کلن صنوبر تبریزی را نسبت به نهال‌های شاهد (خاک متأثر از آب معمولی) به‌همراه داشت. در هر سه کلن صنوبر، بیشترین جذب و تجمع عناصر آهن، مس، نیکل، کروم و سرب در ریشه و عناصر روی و منگنز در برگ اتفاق افتاد. الگوی رفتاری سه کلن صنوبر در جذب و تجمع عناصر غذایی و فلزات سنگین در اندام‌های گیاهی تفاوت معنی‌داری نشان نداد، اما تأثیر کلن بر تولید زی‌تودۀ خشک معنی‌دار بود، به‌طوری‌ که بیشترین تولید زی‌تودۀ خشک ساقه،‌ برگ و کل گیاه در نهال‌های کلن P. nigra 62/154 تیمارشده با خاک متأثر از آب نامتعارف مشاهده شد. نتایج این پژوهش نشان داد که در جنگلکاری‌ها و زراعت چوب برای تولید زی‌تودۀ چوبی، می‌توان آب نامتعارف را منبع مهمی از آب آبیاری و عناصر غذایی در نظر گرفت. از سوی دیگر، صنوبرها به‌منزلۀ گیاهان پالاینده در خاک‌های آلوده ..

کلیدواژه‌ها


عنوان مقاله [English]

Growth properties and nutrients and heavy metals uptake of two-year old seedlings of three black poplar clones in soil with wastewater irrigation

نویسندگان [English]

  • Azadeh Salehi
  • Fatemeh Ahmadloo
(Ph.D.), Research Institute of Forests and Rangelands, Tehran, I.R. Iran.
چکیده [English]

This investigation was carried out to study the effect of wastewater on performance of three clones of Populus nigra. A pot experiment was done in a completely randomized design (CRD) with two factors 1) soil in two levels (soil under wastewater irrigation and soil under well water irrigation) and 2) poplar clones in three levels (P. nigra 62/154, P. nigra 62/127, P. nigra 17/13). After two growing seasons, in three poplar clones, the effect of the treatment of soil affected by wastewater was significant (P ≤ 0.01) on growth properties (plant height, stem diameter, leaf area, biomass of roots, shoots, leaves and total) and uptake and accumulation of micro and macro (NPK) nutrients and also heavy metals in plant tissues compared with control treatment. In three poplar clones, the highest uptake and accumulation of Fe, Cu, Ni, Cr, and Pb took place in the roots and Zn and Mn in the leaves. The three poplar clones did not show significant differences in terms of uptake and accumulation of nutrients and heavy metals in plant tissues; however, the effect of clones on biomass was significant (P ≤ 0.01). The highest values of biomass of leaves, shoots and total were observed in P. nigra 62/154 plants experiencing wastewater. The results of this study demonstrated that wastewater could be used as an important alternative source of water and nutrients for afforestation and wood farming. On the other hand, poplars as a phytoremediator in soil polluted with heavy metals could be useful ....

کلیدواژه‌ها [English]

  • Biomass
  • Irrigation
  • Phytoremediation
  • Polluted soil
  • Populus nigra
  • Wood farming
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