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نقش جزء رس در نگهداشت کربن آلی محلول در خاک | ||
دانش آب و خاک | ||
مقاله 21، دوره 26، شماره 4.2، اسفند 1395، صفحه 273-285 اصل مقاله (483.1 K) | ||
نوع مقاله: مقاله پژوهشی | ||
نویسندگان | ||
ارژنگ فتحی گردلیدانی* 1؛ بهروز رحیم زاده2 | ||
11. دانشجوی دکتری گروه علوم و مهندسی خاک، دانشگاه تهران | ||
2دانش آموخته کارشناسی ارشد گروه علوم و مهندسی خاک، دانشگاه تهران | ||
چکیده | ||
سه نوع خاک، متفاوت از نظر کانی رس غالب (اسمکتایت، ایلایت و آلوفان) و یک نمونهی کائولن از نظر نگهداشت کربن آلی محلول عصاره گیری شده از ورمی کمپوست مقایسه شدند. نمونهها با محلول حاوی کربن آلی با غلظت 200 میلیگرم در لیتر در تعادل گذاشته شدند. میزان کربن آلی محلول جذب شده از تفاوت میان میزان کربن آلی اولیه و نهایی نمونهها به دست آمد. ظرفیت جذب نمونهها به طور معنی داری متفاوت بود (p<0.01)، به ترتیب 47، 40، 18 و 7 میلیگرم کربن آلی محلول بر گرم رسهای اسمکتایت،آلوفان، ایلایت و کائولن. نمونهی اسمکتایت به عنوان نمونهی برتر در جذب کربن آلی محلول شناسایی شد که این امر نشان میدهد رسهای لایه لایه احتمالا ظرفیت نگهداری کربن آلی محلول بیشتری را دارا هستند. | ||
کلیدواژهها | ||
آلوفان؛ اسمکتایت؛ ایلایت؛ کائولن؛ کربن آلی محلول | ||
مراجع | ||
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