نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد مرتعداری، دانشکده منابع طبیعی، دانشگاه تربیت مدرس

2 دانشیار گروه مرتعداری، دانشکده منابع طبیعی، دانشگاه تربیت مدرس

3 دانشجوی کارشناسی ارشد آبخیزداری، دانشکده منابع طبیعی، دانشگاه تربیت مدرس

4 استادیار دانشکده منابع طبیعی، دانشگاه ارومیه

چکیده

کربن آلی خاک اثرات مفید­ی روی خواص شیمیایی­، فیزیکی و حرارتی خاک داشتهو همچنین روی فعالیت‌های بیولوژیکی خاک‌ها موثر است. کربن آلی ذره­اییکی از بخش های مهم ناپایدار مواد آلی می باشد و نقش قابل توجهی در کیفیت خاک و مدیریت سرزمینهای مرتعی دارد. در این تحقیق جهت برآورد دقیق کربن آلی ذره­ای خاک از مدل‌های شبکه عصبی مصنوعی (­­ANN)، شبکه عصبی تطبیقی- فازی(ANFIS)  و رگرسیون چند متغیره استفاده شد. جهت انجام تحقیق، 60 نمونه خاک از عمق 30- 0 سانتیمتری در میان 60 کوادرات یک متر مربعی که در طول 6 ترانسکت 100 متری در مراتع خرابه سنجی ارومیه مستقر شده بود، برداشت شد. خصوصیات خاک (­نیتروژن، رس، سیلت، کربن آلی، اسیدیته، هدایت الکتریکی و وزن مخصوص ظاهری خاک) اندازه­گیری شدند. شاخص های آماری RMSE و  CE جهت ارزیابی کارکرد مدل‌ها استفاده شدند. نتایج نشان داد  بر اساس معیارهای مجذور میانگین مربعات خطا و ضریب کارایی که در مدل رگرسیونی به ترتیب 16/0 و 41/0 و در مدل شبکه عصبی مصنوعی به ترتیب 11/0 و 65/0 و در مدل شبکه عصبی تطبیقی-فازی به ترتیب 06/0 و 79/0 می­باشند، مدل شبکه عصبی تطبیقی فازی (ANFIS) به عنوان ابزار قدرتمندتری در پیش­بینی کربن آلی ذره­ای خاک نسبت به آنالیز رگرسیون خطی چند­متغیره و شبکه عصبی مصنوعی عمل می­کند.

کلیدواژه‌ها

عنوان مقاله [English]

Evaluation of Artificial Neural Network (ANN), Adative Neuro-Fuzzy Inference System (ANFIS) and Regression Models in Prediction of Particulate Organic Matter-Carbon (POM-C) in the Rangelands Kharabe Sanji of Urmia

نویسندگان [English]

  • Behnam Bahrami 1
  • Ghasem Ali Dianati Tilaki 2
  • Saeid Khosro Beigi 3
  • Saeid Janizadeh 3
  • Javad Moetamedi 4

1 Graduate Student of Range Management, Faculty of Natural Resources, Tarbiat Modares University

2 Associate Professor, Faculty of Natural Resources, Tarbiat Modares University

3 M.sc. Student of Watershed Management, Faculty of Natural Resources, Tarbiat Modares University

4 Assistant Professor, Faculty of Natural Resources, Urmia University

چکیده [English]

Soil organic carbon has favorable effects on the chemical, physical and thermal properties of the soil as well as on the biological activities in the soil. Particulate organic matter-carbon (POM-C) is one of the important unstable elements in the soil organic matter has a considerable role in soil quality and rangeland management. In this research, in order to exact estimate of POM-C using ANN, ANFIS, Regression models were developed. Towards this attempt, 60 soil samples were taken from the depth of 0-30 cm of the soil within 60 quadrates of 1m2 of located along 6 transects of 100m in the rangelands Kharabeh Sangi of Urmia. Soil properties (Nitrogen, clay, silt, organic carbon, pH, EC, apparent specific weight of soil) were measured.  Statistic indicators RMSE, CE were used for performance evaluation of the models. The results showed RMSE and CE were calculated 0.16 and 0.41(in Regression Model), 0.11 and 0.65(in Artificial Neural Network Model), 0.06 and 0.79 (in Adative Neuro-Fuzzy Inference System Model), respectively. Also Adative Neuro-Fuzzy Inference System Model is considered as a strong tool in prediction of POM-C compared with Multivariate Linear Regression and Artificial Neural Network Models in the rangelands Kharabeh Sanji of Urmia.  

کلیدواژه‌ها [English]

  • soil properties
  • Organic carbon
  • modeling
  • efficiency coefficient
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