نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشیار، گروه زراعت و اصلاح نباتات، دانشکده علوم کشاورزی، دانشگاه شاهد، تهران، ایران.
2 دانشجوی کارشناسی ارشد رشته علوم و تکنولوژی بذر، گروه زراعت واصلاح نباتات، دانشکده علوم کشاورزی، دانشگاه شاهد، تهران، ایران.
چکیده
این پژوهش به منظور بررسی اثرات هیدروپرایمینگ و تاریخ کاشت بر عملکرد الیاف و روغن دو رقم پنبه، در سال زراعی 98-1397 در مزرعه تحقیقاتی دانشکده کشاورزی دانشگاه شاهد به صورت فاکتوریل سه عاملی در قالب طرح بلوک‌های کامل تصادفی با سه تکرار اجرا شد. عامل اول تاریخ کاشت در سه سطح 25 فروردین، 10 اردیبهشت و 25 اردیبهشت، عامل دوم هیدروپرایمینگ در دو سطح شاهد (بدون پرایمینگ) و هیدروپرایمینگ و عامل سوم دو رقم پنبه ساجدی و رقم May344 بودند. نتایج نشان داد هیدروپرایمینگ تاثیری بر وزن وش غوزه نداشت. وزن وش غوزه در تاریخ کاشت 25 اردیبهشت نسبت به 25 فروردین در هر دو رقم در شرایط بدون پرایمینگ بالاتر بود. هیدروپرایمینگ موجب افزیش عملکرد وش شد، چنانچه بیشترین عملکرد وش با میانگین 07/11 تن در هکتار در بذرهای پرایم شده در رقم May344 در تاریخ کشت 25 فروردین به دست آمد که نسبت به تیمار عدم پرایمینگ افزایش 26 درصدی و نسبت به تاریخ‌های کشت 10 اردیبهشت و 25 اردیبهشت به ترتیب 7/9 و 8/28 درصد بیشتر بود. برهمکنش تاریخ کشت و پرایمینگ نشان داد بالاترین درصد روغن با میانگین 4/23 درصد در تاریخ کشت 10 اردیبهشت و در تیمار بدون پرایمینگ بود.
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