بررسی تغییرات مکانی و پهنه بندی فشردگی خاک با استفاده از روش های مختلف زمین آماری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، گروه مهندسی مکانیک بیوسیستم، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران

2 استادیار، گروه مهندسی مکانیک بیوسیستم، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران

3 استاد، گروه مهندسی مکانیک بیوسیستم، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران

4 استادیار بخش تحقیقات فنی و مهندسی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی خراسان رضوی، سازمان تحقیقات، آموزش و ترویج کشاورزی، مشهد، ایران

چکیده

یکی از خصوصیات مهم در رابطه‌ متقابل بین خاک و گیاه فشردگی خاک ‏می‌باشد. ‏هدف این مطالعه، بررسی تغییرات مکانی فشردگی خاک با استفاده از روش‌های مختلف زمین‌آماری، تحت تاثیر شیوه‌های خاک‌ورزی حفاظتی است. ‏جهت ارزیابی زمین‌آماری، نمونه برداری خاک در 117 نقطه در ابعاد 10×10 متر ‏صورت ‏گرفت. منطقه مورد مطالعه، زمینی به وسعت 2/1 هکتار از اراضی مرکز تحقیقات کشاورزی استان خراسان‌رضوی بود،‏ شاخص مخروطی خاک در عمق 35-0 سانتی‌متر ‏اندازه‌گیری شد‏. بعد از آنالیزهای زمین‌آماری و تعیین نیم تغییرنما، ‏برای ‏تخمین متغیرها از روش‌کریجینگ و روش‌ درون‌یابی قطعی در محیط ‏GS+‎‏ ‏و ‏Arc ‎GIS‏ استفاده شد.‏ معیار ارزیابی در این پژوهش مقادیر ریشه میانگین مربعات خطا (RMSE) ، میانگین خطا (ME) با استفاده از روش ارزیابی متقابل بود. نتایج به‌دست آمده نشان دادند که روش‌های کریجینگ بیزی تجربی (EBK) و کریجینگ معمولی (OK) به ترتیب بهترین الگو برای تخمین فشردگی خاک منطقه می‌باشند.  

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Spatial Variability Analysis and Zoning of Soil Compaction Using Different Geostatistical Methods

نویسندگان [English]

  • Vahid Bahrpour 1
  • Abbas Rouhani 2
  • Mohammad Hossein Abbaspour-Fard 3
  • Saeid Zarifneshat 4
  • Mohammad Hossein Aghkhani 3
1 Former M.Sc. Student, Department of Biosystems Engineering, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran.
2 Associated Professor, Department of Biosystems Engineering, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran.
3 Professor, Department of Biosystems Engineering, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran.
4 Associated Professor, Agricultural engineering research department, khorasan razavi agricultural and natural resources research and education center, AREEO, Mashhad, Iran.
چکیده [English]

One of the important soil properties, which is related to the soil-plant relationship, is soil compaction. The aim of this study is to investigate the spatial variations of soil compaction using different Geostatistic methods, affected by conservation tillage. To evaluating the Geostatistic, soil samples were taken for regular grid of 10 × 10 meters in 117 points. The area of study was a 1.2 hectare land in Agricultural Research Center located in the vicinity of Mashhad in Khorasan Razavi province, the soil cone index was measured at the depth of 0-35 cm. After Geostatistic analysis and semivariogram for estimating variables using the kriging methods (EBK) and Deterministic interpolation methods in GS + and Arc (GIS). Criteria for evaluation in this research are the values of root mean square error (RMSE), mean error (ME), using the cross-validation method. The results showed that the empirical Bayesian kriging methods (EBK) and Ordinary Kriging (OK) are the best model to estimate soil compaction region.

کلیدواژه‌ها [English]

  • Soil compaction
  • conservation tillage
  • Geostatistics
  • interpolation
  • Kriging
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