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ارزیابی کمی کیفیت خاک در کاربریهای مختلف در بخشی از اراضی جنوب شرق قزوین | ||
| تحقیقات آب و خاک ایران | ||
| مقاله 13، دوره 47، شماره 4، دی 1395، صفحه 775-784 اصل مقاله (743.25 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ijswr.2016.59984 | ||
| نویسندگان | ||
| جلیل کاکه* 1؛ منوچهر گرجی2؛ علیرضا علی محمدی3 | ||
| 1دانشجوی دانشگاه تهران | ||
| 2عضو هیئت علمی دانشگاه تهران | ||
| 3فارغ التحصیل دانشگاه تهران | ||
| چکیده | ||
| یکی از ابزارهای مفید برای بررسی وضعیت مدیریت خاک در کاربریهای مختلف، ارزیابی کیفیت خاک است و استفاده از شاخصهای کمی، یکی از مناسبترین روشهای تعیین و مقایسه کیفیت خاکها میباشد. در این تحقیق شاخصها و روشهای انتخاب ویژگیهای مؤثر برای ارزیابی کیفیت خاک در کاربریهای مختلف مورد مقایسه قرار گرفتند. 17 ویژگی فیزیکی، شیمیایی و زیستی خاک در پنج کاربری باغ، مرتع، زراعت آبی، زراعت دیم و اراضی رها شده در سه کلاس شیب کمتر از 2، 7-5 و 11-9 درصد، در جنوب شرق قزوین به عنوان مجموعه کل دادههای Total Data Set)) انتخاب شدند. سپس با استفاده از روش تجزیه مولفههای اصلی (Principle Component Analysis)، هفت ویژگی به عنوان دسته دادههای حداقل (Minimum data set) انتخاب شدند. با استفاده از دو شاخص کیفیت تجمعی (Integrated quality index) و شاخص کیفیت نمرو (Nemero quality index) در این دو مجموعه داده، کیفیت خاک ارزیابی شد. نتایج به دست آمده نشان داد که کاربریهای باغ و مرتع به ترتیب بیشترین مقدار شاخص کیفیت تجمعی و شاخص کیفیت نمرو را در هر دو مجموعه داده به خود اختصاص میدهند اما کاربریهای زراعت آبی، زراعت دیم و اراضی رها شده دارای کمترین کیفیت خاک هستند و تفاوت محسوسی با دو کاربری باغ و مرتع دارند. ضریب تبیین بین دو مجموعه داده برای شاخص کیفیت تجمعی و شاخص کیفیت نمرو به ترتیب برابر 95/0 و 88/0 است که بیانگر قابل اطمینان بودن استفاده از دسته دادههای حداقل به جای مجموعه کل دادهها و همچنین کارائی بهتر شاخص کیفیت تجمعی برای ارزیابی کیفیت خاک منطقه مورد مطالعه است. | ||
| کلیدواژه‌ها | ||
| شاخص کیفیت تجمعی؛ شاخص کیفیت نمرو؛ مجموعه کل دادهها؛ دسته دادههای حداقل؛ کاربری اراضی | ||
| عنوان مقاله [English] | ||
| Quantitative soil quality assessment in different land uses at some Parts of south eastern of Qazvin | ||
| نویسندگان [English] | ||
| Jalil Kakeh1؛ Manoochehr Gorji2؛ Alireza Alimohammadi3 | ||
| چکیده [English] | ||
| Assessment of soil quality is one of the most useful tools for evaluation the soil management condition and different land uses. Quantity indices of soil quality are most suitable methods for determination and comparison of soils quality. In this study soil quality indices and selection methods of effective soil properties were compared for evaluating the soil quality in different land uses. Seventeen soil physical, chemical and biological properties were selected as total data set (TDS) at five different land uses including orchard, rangeland, irrigated farming, dry land farming and unutilized lands, in slope classes of 0-2, 5-7, and 9-11 %, at some parts of south eastern of Qazvin (Iran). Then, 7 properties selected as minimum data set (MDS) using Principle Component Analysis (PCA). Soil quality was evaluated by integrated quality index (IQI) and nemero quality index (NQI) in two set of soil properties including MDS and TDS. The results showed that orchard and rangeland had the highest IQI and NQI in both data sets, respectively, however irrigated farming, dry land farming and unutilized lands have the least IQI and NQI in both data sets, respectively and have significant different compared to orchard and rangeland. Correlation coefficient between TDS and MDS was 0.95 and 0.88 for IQI and NQI, respectively, indicating the reliability of the MDS instead of TDS, and showed that the IQI offers better results for evaluating the soil quality in this case study. | ||
| کلیدواژه‌ها [English] | ||
| Integrated Quality Index, Nemero quality index, Total Data Set, Minimum Data Set, land uses | ||
| مراجع | ||
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