بررسی اثرات خشکسالی بر ناپایداری اراضی کشاورزی دشت سگزی

نوع مقاله: مقاله علمی -پژوهشی کاربردی

نویسندگان

1 دانشجوی دکتری مدیریت و کنترل بیابان گروه احیا مناطق خشک و کوهستانی، دانشکده منابع طبیعی، دانشگاه تهران، تهران، ایران

2 استاد، گروه احیاء مناطق خشک و کوهستانی، دانشکده منابع طبیعی، دانشگاه تهران، تهران، ایران

3 دانشیار، گروه احیاء مناطق خشک و کوهستانی، دانشکده منابع طبیعی، دانشگاه تهران، تهران، ایران

چکیده

به منظور ارزیابی اثرات خشکسالی بر ناپایداری کشاورزی شهرستان سگزی به‌عنوان منطقۀ مورد مطالعه انتخاب گردید و چهار کاربری غالب منطقه شامل اراضی بایر‏، باغی‏، کشاورزی و مرتعی(تیمار شاهد) به‌عنوان تیمارهای مورد مطالعه در نظر گرفته شدند، نمونه برداری از خاک انجام شد و فاکتورهای خاک در دو گروه فاکتورهای اصلاحی و تخریبی در دو عمق سطحی و تحتانی (0 تا 30 و 30 تا60 سانتی متری) خاک مورد بررسی قرار گرفتند. مطالعۀ فاکتورها نشان داد که در منطقه بین تیمارها اختلاف معنی‌داری وجود دارد و خاک منطقه از نظر اسیدیته در ردۀ خاک‌های نسبتاً فقیر قرار دارد. در مجموع در اکثر تیمارها در مورد فاکتورهای مختلف، لایه تحتانی خاک بیشتر تخریب شده است و به سمت بیابان‌زایی پیشرفت کرده است، که به علت تجمع سدیم و بالا بودن نسبت جذبی سدیم در این لایه می باشد در حالی که اثر تخریبی در لایه سطحی کمتر مشاهده شده است. در اراضی تحت اثر فاضلاب شاخص های مواد آلی، ازت، فسفر و کلسیم و منیزیم افزایش یافته است و شاخص های سدیم، شوری، اسدیته و نسبت جذب سدیم کاهش یافته است. از آزمون کلموگروف اسمیرنوف برای نرمال سازی داده ها و تجزیه واریانس برای همۀ فاکتورها به صورت جداگانه محاسبه شد و درنهایت اراضی باغی و کشاورزی به‌عنوان مناسب‌ترین تیمارها و اراضی مرتعی و بایر به‌عنوان نامطلوب‌ترین تیمارها، برای خاک منطقه معرفی شدند.

کلیدواژه‌ها


عنوان مقاله [English]

The effects of Drought on Agricultural Segzi Plain

نویسندگان [English]

  • Marjan Talebiniya 1
  • Gholamreza Zehtabian 2
  • Arash Malekian 3
  • Hassan Khosravi 3
1 PhD Student in Desert Management and Control, Department of Dry and Mountainous Rehabilitation, Faculty of Natural Resources University of Tehran, Tehran, Iran
2 Professor, Department of Dry and Mountainous Rehabilitation, Faculty of Natural Resources, University of Tehran, Tehran, Iran
3 Associate Professor, Department of Dry and Mountainous Regeneration, Faculty of Natural Resources, University of Tehran, Tehran, Iran
چکیده [English]

Desertification and land degradation are currently phenomena In scientific circles, especially in agriculture and natural resources as a scourge afflicting Gripped many countries, including developing countries which results in, The disappearance of renewable sources in each of these countries. With this aim, the Segzi town was selected as the study region and Four dominant land use of abandoned lands, orchards, farmlands and range lands as control treatments were considered as the treatments Soil samples were taken and soil factors in two groups of correction factors and destruction in the soil surface horizons and Lower soil horizons (0 to 30 and 30 to 60 cm) of soil were studied. Study factors showed that there was a significant difference between treatments in terms of soil acidity in the soils category is relatively poor. In general, in most treatments of various factors, the lower layer of soil degradation and desertification has advanced to, Due to the high concentration of sodium and sodium adsorption ratio in this layer is while less damaging effect has been observed in the surface layer. Indicators of land under organic substances in wastewater, nitrogen, phosphorus, and calcium and magnesium increased and indicators sodium, salinity, acidity and sodium adsorption ratio is reduced. Kolmogorov-Smirnov test for normality of data and analysis of variance was calculated for all the invoices separately and finally, garden and agricultural lands as the best treatment and range lands and abandoned areas as unfavorable treatments were introduced to the soil.

کلیدواژه‌ها [English]

  • Desertification
  • Agriculture
  • Land degradation
  • Suitable and Unsuitable Treatment
  • Kolmogorov-Smirnov Test
 
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