ارزیابی کاربرد توأم گوگرد پودری و Thiobacillus thioparus بمنظور اصلاح خاک‌های آهکی غرب ایران

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه محیط زیست دانشکده منابع طبیعی دانشگاه کردستان، سنندج، ایران

چکیده

گوگرد پودری متداول­ترین ماده مصرفی برای اصلاح خاک­های آهکی خصوصاً pH آن‌ها می­باشد و راندمان آن در خاک به شدت به شرایط اکسیداسیون آن وابسته است. هدف این تحقیق ارزیابی کارآمدی مقادیر مختلف گوگرد به منظور اصلاح خاک­های آهکی در حضور باکتری اکسید کننده گوگرد می­باشد. بدین منظور تعداد 15 ستون حاوی یک خاک آهکی شامل چهار تیمار گوگرد با کدهای (500/0)S، (375/0)S، (250/0)S، (125/0)S و یک شاهد فاقد گوگرد هر یک با سه تکرار ساخته و با باکتری Thiobacillus thioparus تلقیح و سپس هر دو هفته یک‌بار به مدت شش ماه تحت آبشویی قرار گرفتند. نتایج نشان داد که آبشویی سولفات حاصل از اکسیداسیون گوگرد از دمای 25 درجه سانتی­گراد به بالا شدت گرفت و در دمای 30 درجه سانتی­گراد به اوج خود رسید. همچنین تجزیه آماری در ستون‌های تیمار شده با گوگرد وجود روابط مثبت و معنی­دار میان دما و سولفات آبشویی شده (01/0=α) از یک سو و منفی و معنی‌دار میان دما و pH (01/0=α) از سوی دیگر را تائید نمود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Evaluation of Simultaneous Application of Powder Sulfur and Thiobacillus thioparus to Improve Calcareous Soils of Western Iran

نویسندگان [English]

  • Ahmad Sayahi
  • BUBAK SOURI
Department of Environmental Sciences, Faculty of Natural Resources, University of Kurdistan, Sanandaj, Iran
چکیده [English]

Powder sulfur is the most common used substance for improvement of calcareous soils particularly their pH while its efficiency in the soil is highly depend on its oxidation condition. The Objective of this research is to evaluate the efficiency of various amounts of sulfur to improve calcareous soils in presence of sulfur-oxidizer bacteria. Hence, 15 soil columns containing a calcareous soil including four sulfur treatments labeled S(0.125), S(0.250), S(0.375) and S(0.500) and a control treatment with lack of sulfur, each with three replications were manufactured and inoculated using Thiobacillus thioparus and then brought under leaching once a two weeks for six months. The results showed that the leakage of sulfate caused by sulfur oxidation was intensified for the temperatures above 25°C and reached a maximum in 30°C. Moreover, statistical analysis among sulfur treated columns approved presence of positive significant relationships between temperature and sulfate leakage (α= 0.01) from one hand, and negative significant relationships between temperature and pH (α= 0.01) on the other hand.

کلیدواژه‌ها [English]

  • Calcareous soil
  • Soil Column
  • Sulfur
  • Thiobacillus thioparus
  • Western Iran
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