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ارزیابی مدلهای رگرسیونی غیرخطی برای توصیف واکنش سرعت جوانهزنی بذر منداب (Eruca sativa Mill.) به دما و پتانسیل آب | ||
علوم و تحقیقات بذر ایران | ||
مقاله 1، دوره 4، شماره 2، شهریور 1396، صفحه 1-16 اصل مقاله (1.76 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22124/jms.2017.2494 | ||
نویسندگان | ||
بتول نژادحسن1؛ آسیه سیاهمرگویی* 2؛ ابراهیم زینلی2؛ فرشید قادری فر3؛ الیاس سلطانی4 | ||
1دانشجو | ||
2استادیار دانشگاه علوم کشاورزی و منابع طبیعی گرگان | ||
3دانشگاه علوم کشاورزی و منابع طبیعی گرگان | ||
4استادیار، گزوه زراعت و اصلاح نباتات،پردیس ابوریحان، دانشگاه تهران: پاکدشت، ایران | ||
چکیده | ||
پژوهش حاضر بهمنظور ارزیابی مدلهای رگرسیونی غیرخطی (مدلهای بتای اصلی، بتای تغییریافته، دوتکهای و دندانمانند) برای توصیف واکنش سرعت جوانهزنی بذر منداب (Eruca sativa Mill.) به دما و پتانسیل آب به صورت فاکتوریل در قالب طرح کاملاً تصادفی در چهار تکرار در دانشگاه علوم کشاورزی و منابع طبیعی گرگان درسال 1392 انجام شد. تیمارهای مورد بررسی شامل دما در 9 سطح ( 5/2 ،5 ،10 ،15 ،20 ،25 ،30 ،35 و 38 درجه سانتیگراد) و پتانسیلهای آب در 8 سطح (صفر ، 2/0-، 4/0-، 6/0-، 8/0-، 0/1-، 2/1- و 4/1- مگاپاسکال) بود. در این مطالعه از مدلهای بتای اصلی، بتای تغییریافته، مدل دوتکهای و مدل دندان مانند برای تعیین دماهای کاردینال جوانهزنی استفاده شد. مدل بتای اصلی نسبت به سایر مدلها واکنش سرعت جوانهزنی به دما و پتانسیل آب را بهتر توصیف نمود. بر اساس این مدل دمای پایه، دمای مطلوب و دمای سقف در شرایط عدم تنش (پتانسیل صفر) بهترتیب 0/0، 13/30 و 50/38 درجه سانتیگراد برآورد شد. تغییرات پتانسیل آب تأثیر معنیداری بر دمای مطلوب و سقف داشتند اما دمای پایه و تعداد ساعت زیستی لازم برای جوانهزنی بذر منداب تحت تأثیر پتانسیل آب قرار نگرفتند. | ||
کلیدواژهها | ||
تنش خشکی؛ ساعت بیولوژیک؛ شاخصهای جوانهزنی؛ مدلهای رگرسیونی | ||
مراجع | ||
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