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بررسی اثر روش های مختلف کاشت و سطوح مختلف توزیع هورمون ها بر صفات زایشی ژنوتیپ های برنج تحت تنش شوری در شمال خوزستان | ||
دانش کشاورزی وتولید پایدار | ||
دوره 33، شماره 3، مهر 1402، صفحه 203-229 اصل مقاله (2.04 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22034/saps.2021.47455.2721 | ||
نویسندگان | ||
کاوه لیموچی* 1؛ سید عطاءاله سیادت2 | ||
1محقق دوره پسادکتری، گروه مهندسی تولید و ژنتیک گیاهی، دانشکده کشاورزی، دانشگاه علوم کشاورزی و منابع طبیعی خوزستان، ایران. | ||
2استاد، گروه مهندسی تولید و ژنتیک گیاهی، دانشکده کشاورزی، دانشگاه علوم کشاورزی و منابع طبیعی خوزستان، ایران. | ||
چکیده | ||
این پژوهش به صورت کرتهای دو بار خردشده در قالب طرح بلوکهای کامل تصادفی با سه تکرار در استان خوزستان با هدف تعیین بهترین روش کشت برنج در دو سال (1397 و 1398) انجام شد. سه شیوه کاشت (خشکهکاری، نشایی و مستقیم یا رایج منطقه)، 16 سطح مختلف هورمونهای اکسین و سالسیلیک اسید به صورت پرایمینگ بذری و تیمارهای مختلف اسپری برگی با مقدار 1 و 2 لیتر در هکتار و زمانهای اسپری مختلف در مراحل پنجهزنی و ظهور خوشه بر ژینوتیپهای مختلف برنج مورد بررسی قرار گرفت. یافتهها: نتایج تچزیه مرکب نشان داد بین اثرات اصلی و متقابل صفات تفاوت معنیداری در سطح احتمال یک درصد وجود دارد. عملکرد دانه و اجزای عملکرد به همراه کلیه صفات رویشی و زایشی (وزن پانیکول، وزن هزاردانه، تعداد دانه پر و پوک در پانیکول) که میتوانند از طریق فتوسنتز جاری یا انتقال مجدد باعث افزایش عملکرد دانه گردند بیشترین مقدار خود را در روش کشت نشایی به دلیل ایجاد شرایط بهینه و مطلوب رشد در راستای تنشزدایی دارا بودند. در بین تیمارهای هورمونی بیشترین مقدار عملکرد دانه و اجزای عملکرد در پرایمینگ تلفیقی بذر با هر دو هورمون رشدی اکسین و سالیسیلیک اسید به دلیل مکمل هم بودن دو هورمون رشدی در تنظیم واکنشهای بیوشیمیایی و مرفولوژیکی گیاه که هرچه زمان استفاده از این هورمونها زودتر باشد به لحاظ زمانبر بودن، تأثیر سازگاری به مراتب بیشتری داشتند که در روش پرایمینگ به دلیل ایجاد مقاومت و تسریع در رشد، مشاهده شدند. | ||
کلیدواژهها | ||
برنج؛ ژنوتیپ؛ روش کشت؛ هورمون؛ زایشی؛ پانیکول؛ دانه | ||
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