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  • تاثیر آتش‎سوزی برخصوصیات فیزیکی، شیمیایی و بیولوژیکی خاک اکوسیستم‎های جنگلی

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رقم المقالة : 3280 زيارة : 140 الصفحة: 31 - 41

نوع المخطوط: ابحاث

تاثیر آتش‎سوزی برخصوصیات فیزیکی، شیمیایی و بیولوژیکی خاک اکوسیستم‎های جنگلی

الموضوعات :

مریم مصلحی 1 , هاشم حبشی 2 , اکرم احمدی 3

1 - دانشجوی دکتری جنگل شناسی و اکولوژی جنگل دانشگاه علوم کشاورزی و منابع طبیعی گرگان*(مسئول مکاتبات)
2 - استادیار دانشکده علوم جنگل، دانشگاه علوم کشاورزی و منابع طبیعی گرگان
3 - دانشجوی دکتری جنگل شناسی و اکولوژی جنگل دانشگاه علوم کشاورزی و منابع طبیعی گرگان

تاريخ الإرسال : 06 الثلاثاء , جمادى الثانية, 1434 تاريخ التأكيد : 26 الأربعاء , ذو القعدة, 1434 تاريخ الإصدار : 19 الأحد , صفر, 1435

الکلمات المفتاحية: آتش‎سوزی, خصوصیات خاک, اکوسیستم‎های جنگلی,

ملخص المقالة :

آتش‎سوزی یکی از رخدادهای مهم و رایج در کلیه اکوسیستم‎های جنگلی است که تاثیرات بسیار پیچیده‎ای بر روی خصوصیات خاک دارد. تغییرات در خصوصیات فیزیکی (تخریب ساختار و تخلخل خاک، افزایش رواناب و فرسایش)، شیمیایی (کاهش مواد آلی، تبخیر کاتیون‎ها، تغییر در ذخایر عناصر غذایی وچرخه آن‎ها) و بیولوژیکی خاک (کاهش در گونه‎های میکرو و ماکروفون‎ها و تغییر جمعیت میکربی) توسط آتش می‎تواند سبب تغییر در پوشش و فعالیت‎های گیاهی گردد. آتش‎سوزی‎های شدید در جنگل، همچنین با ایجاد ترکیبات آلی با خاصیت آب‎گریزی در خاک منجر به کاهش نفوذپذیری آب گردیده و بازده چرخه هیدرولوژیکی را کاهش می‎دهد. خاک، آب و موجودات زنده از عوامل موثر در تعادل و پایداری اکوسیستم جنگلی می‎باشد که هرسه آن تحت تاثیر آتش‎سوزی‎های شدید تخریب می‌گردد لذا در این تحقیق به بررسی تاثیرات آتش‎سوزی جنگل بر خصوصیات مختلف خاک که در نگهداشت سلامت اکوسیستم موثر می‎باشند، پرداخته شده است.

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