تاثیر کاربرد فاضلاب خام شهری بر کیفیت فیزیکی خاک و عملکرد بیولوژیکی گندم (مطالعه موردی: منطقه هرسین)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار گروه علوم و مهندسی خاک دانشگاه رازی

2 گروه علوم و مهندسی خاک دانشکده کشاورزی دانشگاه رازی

چکیده

این پژوهش، با هدف بررسی کاربرد جندین دهه فاضلاب خام شهری بر کیفیت فیزیکی خاک و عملکرد بیولوژیکی گندم در منطقه هرسین اجراء گردید. در این راستا، مهمترین وِیژگی­های فیزیکی موثر بر کیفیت فیزیکی خاک، و نیز غلظت کل بعضی از عناصر سنگین نمونه­های خاک ده نقطه مطالعاتی تحت آبیاری با آب چاه و فاضلاب مورد تجزیه­آماری قرار گرفت. نتایج نشان داد که کاربرد فاضلاب با افزایش ماده­آلی، موجب بهبود پایداری خاکدانه­ها، کاهش چگالی­ظاهری، و افزایش سایر ویژگی­های فیزیکی­خاک شامل: هدایت هیدرولیکی­اشباع، درصد تخلخل و رطوبت­ اشباع گردید. غلظت کل روی و آهن در اراضی­آبیاری شده با فاضلاب در مقایسه با اراضی تحت آبیاری با آب چاه، به طور معنی‌داری بیشتر بوده، در‌ حالیکه غلظت کروم، سرب و نیکل دارای اختلاف معنی‌داری نبودند. بطورکلی، کاربرد فاضلاب در اراضی، بعضی از شـاخص­هـای کیفیت فیزیکی خاک را در منطقه مطالعاتی بهبود بخشیده­است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effects of raw municipal wastewater on soil physical quality and biological yield of Wheat (Case study: Harsin)

نویسندگان [English]

  • Ali Asshraf Amirinejad 1
  • Razieh Shahbazzadeh 2
1 Razi University of Kermanshah
2 Razi University of Kermanshah
چکیده [English]

The present study was done to investigate a few decades application of raw municipal wastewater on soil physical quality and biological yield of wheat in Harsin. In this way, the main soil physical properties, which effect on soil physical quality, and total concentrations of some heavy metals in the soils of ten sites, that have been irrigated by wells water or wastewater, were statically analysed. The results showed that the use of wastewater, while added organic matter to the soil, improved aggregate stability, reduced soil bulk density, and increased other soil physical properties, including: saturated hydraulic conductivity, total porosity and saturation percentage. The total concentrations of Zn and Fe in the lands that had been irrigated by wastewater were significantly more than in the lands had been irrigated by wells water, while, concentrations of Cr, Pb and Ni were not significantly different. In general, application of wastewater improved the soil physical quality and meanwhile increased biological yield of wheat in the study area..

کلیدواژه‌ها [English]

  • Agricultural lands
  • Heavy metals
  • soil physical properties
  • uncommon waters
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