ظرفیت ترسیب کربن در اکوسیستم مرتع و ارتباط آن با خصوصیات فیزیکی و شیمیایی خاک در مراتع خوی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد دانشگاه محقق اردبیلی

2 استادیار گروه علوم خاک دانشکده کشاورزی دانشگاه محقق اردبیلی

3 استادیار دانشکده منابع طبیعی دانشگاه ارومیه

چکیده

افزایش ترسیب کربن در خاک روش بسیار مناسبی در کاهش تراکم CO2 اتمسفری بوده و نقش بسیار مهمی در کاهش مشکلات تغییر اقلیم و آلودگی هوا دارد. در سال­های اخیر این موضوع توجه محققان مختلفی را به خود جلب کرده است. در پژوهش حاضر، ظرفیت ترسیب کربن و ارتباط آن با خصوصیات فیزیکی و شیمیایی خاک در سه مکان مرتعی شهرستان خوی مورد بررسی قرار گرفت. نمونه­برداری خاک در دو عمق 15-0 و 30-15 سانتیمتری انجام شد. مقدار کل کربن آلی ذخیره شده خاک در مکان مرتعی اول، دوم و سوم به ترتیب برابر 89/26، 66/24و 15/18 تن در هکتار برآورد گردید که بیشترین مقدار کربن آلی ذخیره شده متعلق به مکان اول بود. در تمامی مناطق مذکور، بیشترین مقدار کربن آلی خاک مربوط به عمق 30-15 سانتیمتری مشاهده گردید. نتایج رگرسیون گام به گام نشان داد که درصد نیتروژن، جرم مخصوص ظاهری و آهک خاک به ترتیب از مهمترین عوامل تأثیرگذار بر مقدار کربن آلی خاک در مکان­های مورد بررسی می­باشد. در حالت کلی، مدیریت بهینه اکوسیستم­های مرتعی نقش مهمی در بهبود ظرفیت ترسیب کربن اتمسفری ایفا می­کنند.

کلیدواژه‌ها


عنوان مقاله [English]

Carbon Sequestration Capacity in Rangeland Ecosystems and it's Relation with Soil Physical and Chemical Characteristics in Rangelands of Khoy

نویسندگان [English]

  • Roghaye Ghoreyshi 1
  • Esmaeil Goly kalanpa 2
  • javad Motamedi 3
  • Farshad Keivan Behjou 2
1 MSc. Student, Department of Range and watershed Management University of Mohaghegh Ardabili
2 Assistant Professor, Department of Soil Science University of Mohaghegh Ardabili
3 Assistant Professor, Rangeland Department, Urmia University, Iran
چکیده [English]

Increasing carbon sequestration in soil is an efficient method to decrease concentration of atmospheric CO2 and has a considerable role in reduction of problems caused by climate change and air pollution which recently has been considered as an attractive issue for many of the researchers. In this study, capacity of carbon sequestration and it's relation with soil physical and chemical characteristics in three different sites of Khoy rangelands was investigated. In this regard, soil samples were collected from depths of 0-15 and 15-30 centimeters. The results showed that total organic carbon concentration in sites of one and two and in third site were respectively equal to 26.89, 24.66 and 18.15 tons per hectare, and the highest amount of  accumulated carbon was related to first site. In all of the studied sites, highest amounts of soil organic carbon were related to depth of 15-30centimeters samples. The results obtained from stepwise regression analysis  indicated that percent of nitrogen concentration, bulk density and lime content of soil were respectively the most effective factors on organic carbon content of the soil in investigated sites. Generally optimal management of rangeland ecosystems has an important role in improvement of atmospheric carbon sequestration capacity. 

کلیدواژه‌ها [English]

  • carbon sequestration
  • soil physical and chemical characteristics
  • rangelands of Khoy
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