ارزیابی آبشویی خاک شور و سدیمی با استفاده از مواد اصلاحی در شرایط آزمایشگاهی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، گروه مهندسی آب، دانشکده مهندسی زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران

2 استادیار، گروه مهندسی آب، دانشکده مهندسی زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران

چکیده

یکی از مشکلات رایج در مناطق خشک و نیمه خشک کشور، وجود خاک­های شور و سدیمی است. از این رو مدیریت آب و خاک یکی از مباحث کلیدی در تامین نیاز غذایی جمعیت در حال رشد کشور می­باشد. در این پژوهش به بهسازی خاک شور و سدیمی در منطقه آذرنگین تبریز پرداخته شد تا اثر تیمارهای مختلف مواد اصلاحی بر ویژگی­های شیمیایی خاک مورد ارزیابی قرار گیرد. تیمارها شامل اسید سولفوریک، سولفات آهن فرو، گوگرد و آب آبیاری (شاهد) بودند. علاوه بر تعیین نوع ماده اصلاحی، مقدار ماده اصلاح­کننده نیز مورد بررسی قرار گرفت. مواد اصلاحی با دو سطح 10 و 20 درصد به طور جداگانه به خاک اضافه شدند. نتایج نشان داد که کاربرد اسید سولفوریک، مقدار درصد سدیم تبادلی و نسبت جذب سدیم را نسبت به حالت اولیه به­ترتیب به کمتر از 60 درصد و 45 کاهش می­دهد. از سوی دیگر نتایج نشان داد که کاربرد اسید سولفوریک و سولفات آهن فرو مقادیر ESP، SAR وECe را به­طور معنی­داری کاهش داد. این در حالی است که برای تیمار گوگرد، میانگین پارامترها هیچ گونه تفاوت معنی­داری را با تیمار شاهد نشان نداد. در نهایت یافته­ها نشان داد که بین سطوح 10 و 20 درصد مواد اصلاحی، اختلاف معنی­داری وجود دارد، به‏طوری­که بیشترین کاهش این پارامترها مربوط به کاربرد 20 درصد ماده اصلاح کننده­ی اسید سولفوریک بود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Saline-Sodic Soil Leaching Assessment Using Different Amendments under Laboratory Condition

نویسندگان [English]

  • Ali Koulaian 1
  • Mojtab Khoshravesh 2
1 M.Sc. Student, Department of Water Engineering, Faculty of Agricultural Engineering, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
2 Assistant Professor, Department of Water Engineering, Faculty of Agricultural Engineering, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
چکیده [English]

One of the common problems in arid and semi-arid regions of the country is the presence of saline and sodic soils. Therefore, water and soil management is one of the key issues in supplying the food for growing population of the country. In this study, the effect of different treatments on chemical properties of the soil was investigated to reclaminate the saline and sodic soils in Azaranegin, Tabriz. Treatments included sulfuric acid, iron sulfate, sulfur and irrigation water as a control. Also, the amount of amendment materials was investigated. The amendment materials were added to the soil with the rate of 10% and 20%, separately. The results showed that the application of sulfuric acid reduced the amount of Exchangeable Sodium Percentage (ESP) and the Sodium Adsorption Ratio (SAR) to less than 60% and 45%, respectively. On the other hand, the results showed that the application of sulfuric acid and iron sulfate reduced the ESP, SAR and ECe values significantly. However, in the case of sulfur application, the mean parameters did not indicate any significant differences with control treatment. Finally, the findings showed that there was a significant difference between 10% and 20% levels of amendment materials, so that the most reduction of these parameters were related to the sulfuric acid with application of 20% level.

کلیدواژه‌ها [English]

  • Leaching
  • Iron sulfate(II)
  • soil reclamation
  • Sulfur
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