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فردین قنبری محمد سیاری

چکیده

دماي پايين منجر به آسيب­هاي فيزيولوژيکي به سلول­ در گياهان حساس به سرمازدگي و خسارت محصولات گرمسيري و نيمه گرمسيري مانند گوجه فرنگي مي­شود. به منظور ارزيابي اثر پیش تیمار خشکي بر تحمل به سرما نشا­های گوجه فرنگی و رشد و عملکرد بعدی آن در شرایط مزرعه، تحقیقی در دانشکده کشاورزي دانشگاه بوعلي سينا همدان در سال­ 1395 به صورت فاکتوريل در قالب طرح بلوک­هاي کامل تصادفي در سه تکرار انجام شد. تیمارهاي آزمايشي شامل تنش خشکي در سه سطح (صفر، 10 و 20 درصد PEG) و تنش سرمايي در دو سطح (تنش و بدون تنش) بود. پس از اعمال پیش تیمار تنش خشکي، نشاها به مدت شش ساعت در شش روز متوالي در دماي سه درجه سانتي­گراد قرار گرفتند و پس از آن در مزرعه کاشته شدند. نتايج نشان داد که پیش تیمار خشکي تاثير معني­داري در افزايش رشد و عملکرد گوجه فرنگي در شرايط مزرعه دارد. گياهاني که پیش تیمار نشده بودند پس از تیمار سرمايي رشد کمي در شرايط مزرعه داشتند و همچنين عملکرد آن­ها پايين­تر بود. پیش تیمار خشکي سبب افزايش اندازه ميوه، افزايش عمر ماندگاري آن و کاهش تعداد ميوه­هاي دارای پوسیدگی گلگاه شد. بالاترين رشد و عملکرد کل میوه در کاربرد 10 درصد PEG به دست آمد. به طور کلي نتايج اين آزمايش نشان داد که پیش تیمار خشکي مي­تواند به طور موثري براي حفاظت نشاهاي گوجه فرنگي از آسيب ايجاد شده به وسيله تنش دماي پايين در مراحل اوليه رشد استفاده شود و سبب رشد و عملکرد بهتر گوجه فرنگي در شرايط مزرعه مي­شود.

جزئیات مقاله

کلمات کلیدی

پوسیدگی گلگاه, تنش, سرمازدگی, مقاوم سازی, مقاومت تقاطعی

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ارجاع به مقاله
قنبریف., & سیاریم. (2020). ارزیابی اثر پیش تیمار¬های خشکی و سرما بر رشد، نمو و میزان عملکرد گوجه‌فرنگی (Lycopersicun esculentum Mill.) در شرایط مزرعه. علوم باغبانی, 34(1), 171-183. https://doi.org/10.22067/jhorts4.v34i1.82485
نوع مقاله
علمی - پژوهشی