ترسیب کربن و برآورد ارزش اقتصادی آن در بخشی از مراتع قرق شده و تحت چرای استان خوزستان

آب و خاک

مقاله 7، دوره 32، شماره 2 - شماره پیاپی 58، خرداد 1397، صفحه 375-386   

نوع مقاله: مقالات پژوهشی

شناسه دیجیتال (DOI): 10.22067/jsw.v32i2.69326

نویسندگان

علیرضا اوجی؛ احمد لندی^* ؛ سعید حجتی

دانشگاه شهید چمران اهواز

چکیده

ماده آلی خاک از مهمترین عوامل ارزیابی کیفیت خاک است و ارتباط نزدیکی با ویژگی‏های فیزیکی، شیمیایی و بیولوژیکی خاک دارد. از طرفی، ترسیب کربن در زیتوده گیاهی و خاک‏‌های متأثر از آن هستند، ساده‏ترین و به ‏لحاظ اقتصادی عملی‏ترین راهکار ممکن جهت کاهش خطرات دی‏اکسید کربن اتمسفری است. اطلاعات کمی در ارتباط با تأثیر مدیریت قرق بر ترسیب و مدیریت کربن در خاک‏های مراتع استان خوزستان وجود دارد؛ لذا این مطالعه با هدف بررسی تأثیر مدیریت قرق بر میزان و تغییرات ترسیب و مدیریت کربن خاک و با دیدگاه اقتصادی در برخی خاک‏های مراتع دشت پنتی ایذه و منطقه دیمه رامهرمز در استان خوزستان انجام شد. چهار مرتع با مدیریت‏های مختلف (قرق شده و تحت چرا) در اطراف ایذه و رامهرمز انتخاب و سپس از 15 نقطه به صورت تصادفی و از دو عمق سطحی و زیرسطحی (با توجه به مرز تفکیک افق‏ها) نمونه‏برداری صورت گرفت. نتایج حاصل از ترسیب و شاخص مدیریت کربن در این مطالعه نشان دهنده بازیابی کربن خاک و بهبود کیفیت آن طی قرق می‏باشد. از طرفی، برآورد ارزش اقتصادی ترسیب کربن طی قرق در مراتع مطالعاتی بسیار قابل توجه بوده و موجب افزایش 17 و 7/12 درصدی ارزش ترسیب کربن در منطقه ایذه و رامهرمز گردیده است. از این رو ضروری به نظر می‏رسد که تیمار قرق به‏عنوان یکی از برنامه‏های اصلی در طرح‏های منابع طبیعی تجدید شونده مد نظر قرار گیرد.

کلیدواژه‌ها

اقتصادی؛ ترسیب کربن؛ شاخص مدیریت کربن؛ مدیریت قرق؛ مرتع

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