مهدی سرائی تبریزی حسین بابازاده مهدی همائی فریدون کاوه مسعود پارسی نژاد


شوری منابع آب و خاک از چالش‌های مهم بخش کشاورزی در ایران است. در زمینه چگونگی پاسخ گیاهان به تنش‌ شوری، چند مدل‌ ریاضی وجود دارد. لیکن اغلب این مدل‌ها در شرایطی خاص کاربرد دارند. هدف از این پژوهش، برآورد آستانۀ کاهش عملکرد ریحان، مدل‌سازی واکنش گیاه ریحان به شوری و نیز ارزیابی کارآیی مدل‌های ریاضی موجود در برآورد عملکرد این گیاه بود. به همین منظور، آزمایشی با 13سطح مختلف شوری شامل شوری‌های 2/1، 8/1، 2، 2/2، 5/2، 8/2، 3، 5/3، 4، 5، 6، 8 و 10 دسی‌زیمنس بر متر انجام شد. تیمارهای شوری با استفاده از اختلاط آب رودخانه شور با آب شرب تهیه شد. به منظور کمّی کردن اثر شوری بر عملکرد محصول، از هفت مدل‌ ریاضی استفاده شد. نتایج نشان داد آستانه کاهش عملکرد ریحان نسبت به شوری خاک 25/2 دسی‌زیمنس بر متر و شیب خط کاهش عملکرد، 2/7 درصد بر دسی‌زیمنس بر متر می‌باشد. مدل ون‌گنوختن و هافمن (48) در شبیه‌سازی تابع کاهش عملکرد ریحان به شوری عصاره اشباع دقتی بیشتر نسبت به دیگر مدل‌ها داشت. به طور کلی، نتایج این پژوهش نشان داد که مدل‌های ون‌گنوختن و هافمن (48)، استپوهن و همکاران (44) و همایی و همکاران (13) برای شبیه‌سازی واکنش عملکرد ریحان به شوری عصاره اشباع خاک از دقتی مناسب برخوردارند.

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ارجاع به مقاله
سرائی تبریزیم., بابازادهح., همائیم., کاوهف., & پارسی نژادم. (2015). تعیین حد آستانۀ کاهش عملکرد ریحان و ارزیابی مدل‌های جذب آب تحت شرایط تنش شوری. آب و خاک, 30(1), 30-40. https://doi.org/10.22067/jsw.v30i1.35583
نوع مقاله
علمی - پژوهشی