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
 
Abad, J. R. S., Khosravi, H., & Alamdarlou, E. H. (2014). Assessment the effects of land use changes on soil physicochemical properties in Jafarabad of Golestan province, Iran. Bulletin of Environment, Pharmacology and Life Sciences, (3), 296-300
Afyuni M, Mosaddeghi M. (2001). Effect of tillage methods on soil physical properties and bromide movement. J. Sci. and Tech. Agri. and Natures. 5(2): 39-52.
Ajami, M. KHarmali, F. Ayobi, Sh. (2008). Changes in some soil quality parameters due to land use change in different situations of slope landslide in eastern Golestan province. Iranian Water and Soil Research (Iranian Agricultural Science. 39(1): 15-30.
Amiri B. (2003).The impact of agricultural practices (Dryland farming) on land degradation. Research and development in agriculture and horticulturer. (68).
De Clerck F, Singer M, Lindert J. (2003). A 60-year history of California soil quality using paired samples. Geoderma. 114: 215-230.
Dregne H, Kassas M, Rozanov B. (1991). A new assessment of the world status of desertification. Desertification control Bulletin (UNEP).(20)
Ganji M. (2009). The effect of agriculture in land degradation in Zanjan. Combating desertification Master's thesis, Faculty of Natural Resources, University of Tehran. 86 p.
Gharmakher, H. Maramaie, M. (2011). Study of the Effects of Land Use Change on Soil Properties (Case Study: Kachic Watershed Area). Journal of Soil Management and Sustainable Production Volume 1, Number 2
Hejazizadeh Z, Jozizadeh S. (2010). Evaluation of drought climate and its effect on wheat production in the province. Iranian Journal of Geographical Society. 8 (24).
Khanamani A, Karimzade H. (2013). Use soil criteria to assess the degree of desertification (plain Segzi). Journal of Science and Technology of Agriculture and Natural Resources. Water and soil sciences.63(17): 49-59.
Navidi, M. Sarmadian, F. Mahmoodi, sh. (2009). Investigating the Effects of Land Use Change on Physical and Chemical Indices of Soil Quality in Surface Horizons of Range Rangelands in the East of Qazvin Province. Pasture and Watershed Management (Iranian Natural Resources). 62(2): 299-310.
Shakerian, N., Zehtabian, G. R., Azarnivand, H., & Khosravi, H. (2011). Evaluation of desertification intensity based on soil and water criteria in Jarghooyeh region. Desert, 16(1), 23-32.
Sharifani F. (2005). Effect of agricultural operations on desertification of Segzy plains, Isfahan, Combating desertification Master's thesis, Natural Resources Faculty, University of Tehran. 123 p.
Shayan jezi M, Feizi M, Ghorbani H. (2010). The effect of using wastewater in agriculture on some soil chemical properties. The second national seminar on the status of recycled water and waste water management.
Sohraby T. (2005). Impact of agricultural practices in land degradation Natural resources- a case study in Taleghan Region. Combating desertification Master's thesis, Natural Resources Faculty, University of Tehran. 134 p.
Zalidis G, Stamatiadis S, Takav. (2002). Impact of agricultural practices on soil and water quality in the Mediterranean region.
Zehtabian Gh, Amiri B, Soori M. ( 2005). The comparison of soil nutrients among agriculture land and rangelands with emphasis on N, P, K (case study: Kohdasht-Zanjan), Journal of pajohesh & sazandegi, Minisity of Jihad -e-Sazandegi. 68(3): 9-19.
Zehtabian Gh, Khosravi H. (2009). Investigation on effect of agricultural management on land degradation- a case study in Taleghan Region, Iran. 7th international symposium on plant-soil interaction at low PH, South China University of Technology Press, Guangzhou.
Zehtabian Gh, Khosravi H. (2010). The impact of agricultural activities on land degradation in Taloqan area. Pasture Systems and Watershed Management Journal, Journal of Natural Resources. 63 (2): 207-218.
Zehtabian Gh, Khosravi H, Azareh A. (2014). The impact of agricultural activities on land degradation in the city seal. Journal of Range and Watershed Management. 67 (1): 72 -61.