نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار، دانشگاه بین‌المللی امام خمینی (ره) قزوین
2 دانش‌آموخته کارشناسی ارشد اصلاح نباتات، دانشگاه بین‌المللی امام خمینی (ره) قزوین
چکیده
به‌منظور بررسی اثر محلول‌پاشی نانو ذرات دیاکسید تیتانیوم بر عملکرد و اجزای عملکرد ژنوتیپهای مختلف گلرنگ تحت شرایط آبیاری معمولی و تنش کم آبیاری، آزمایشی به‌صورت اسپلیت فاکتوریل در قالب طرح بلوکهای کامل تصادفی با سه تکرار در مزرعه تحقیقاتی دانشگاه بین‌المللی امام خمینی (ره) قزوین در سال 1393 اجرا شد. رژیم آبیاری در دو سطح شامل آبیاری معمولی (آبیاری پس از 60 میلی‌متر تبخیر از تشتک تبخیر کلاس A) و تنش کم آبیاری (آبیاری تا اواخر مرحله گلدهی مشابه آبیاری معمولی و در اواخر گلدهی تا رسیدگی، آبیاری پس از 100 میلی‌متر تبخیر از تشتک تبخیر کلاس A) به‌عنوان عامل اصلی و نانو دیاکسید تیتانیوم در دو سطح، شامل استفاده از نانو دیاکسید تیتانیوم (غلظت 0.05 درصد قبل از گلدهی) و عدم استفاده (تیمار شاهد) و ژنوتیپ در هشت سطح به‌عنوان عاملهای فرعی در نظر گرفته شدند. تنش کم آبیاری موجب کاهش معنیدار وزن هزار دانه، شاخص برداشت و عملکرد دانه شد. تیمار نانو دیاکسید تیتانیوم قطر طبق، شاخص برداشت و عملکرد دانه را افزایش داد و همچنین اثر سوء تنش خشکی بر قطر طبق را به‌طور معنیداری کاهش داد. بین ژنوتیپ ها برای تمام صفات مورد بررسی به‌جز قطر طبق تفاوت معنیداری مشاهده شد. در این آزمایش ارقام فرامان، سینا و توده محلی اصفهان بالاترین عملکرد دانه و ارقام خارجی «مکزیکی 11» و «مکزیکی 88» پایینترین عملکرد را داشتند.
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