اثر کاربرد پلی‌آکریل‌آمید در مهار فرسایش پاشمانی از خاک تحت تأثیر پدیده انجماد- ذوب

آب و خاک

مقاله 9، دوره 29، شماره 6، اسفند 1394، صفحه 1601-1611   

نوع مقاله: مقالات پژوهشی

شناسه دیجیتال (DOI): 10.22067/jsw.v29i6.36782

نویسندگان

سیدحمیدرضا صادقی^* ؛ محمدباقر رئیسی؛ زینب حزباوی

دانشگاه تربیت مدرّس

چکیده

بررسی اثرات پدیده انجماد و انجماد- ذوب در مباحث فرسایش و تولید رسوب حائز اهمیت است. با این‌حال، حفاظت خاک‌های تحت تاثیر این پدیده‌ها با شیوه‌های مختلف و از جمله استفاده از افزودنی‌ها هنوز مورد توجه قرار نگرفته است. از این‌رو پژوهش حاضر برای ارزیابی عملکرد پلی‌آکریل‌آمید (PAM) در مهار تأثیر چرخه انجماد- ذوب روی فرسایش پاشمانی از یک خاک لوم سیلتی انجام پذیرفت. در این راستا، فرسایش پاشمانی با استفاده از فنجان‌های پاشمان در دو تیمار شاهد بدون استفاده از PAM روی خاک با شرایط انجماد و دیگری با انجماد- ذوب و دو تیمار با شرایط انجماد و دیگری با انجماد- ذوب بعد از کاربرد PAM به ‌میزان 20 کیلوگرم در هکتار اندازه‌گیری شد. میانگین میزان فرسایش پاشمانی خالص، در بالادست و پایین‌دست فنجان‌های پاشمان در کلیه تیمارهای آزمایش با آزمون t جفتی مقایسه شد. مقایسه میانگین‌های مقادیر رسوب مشاهداتی و برآوردی نشان‌دهنده اختلاف معنی‌دار (018/0P

کلیدواژه‌ها

افزودنی‌های خاک؛ بجنورد؛ حفاظت خاک؛ فرسایش بارانی

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