نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه زراعت و اصلاح نباتات، پردیس کشاورزی و منابع طبیعی، دانشگاه رازی، کرمانشاه

2 گروه زراعت و اصلاح نباتات، پردیس کشاورزی و منابع طبیعی، دانشگاه رازی، کرمانشاه، ایران.

چکیده

معمولاً درصد و سرعت جوانه‏ زنی بذر در آزمایشگاه با مزرعه به ویژه در شرایط دیم، متفاوت است. لذا به منظور بررسی آزمون جوانه‏ زنی استاندارد برای پیش‏بینی وضعیت ظهور و استقرار گیاهچه عدس، دو آزمایش جداگانه در آزمایشگاه و مزرعه انجام شد. هشت توده بذر عدس دیم (شامل چهار رقم کیمیا، بیله‏ سوار، قزوین و محلی با طول دوره انبارداری متفاوت) در آزمون جوانه‏ زنی استاندارد در آزمایشگاه و مزرعه به‏ صورت دیم کشت شدند و صفات مرتبط با بنیه گیاهچه (مثل سرعت سبز‏شدن گیاهچه، متوسط زمان لازم برای سبز‏شدن، میانگین سبز‏شدن روزانه و درصد سبز‏شدن نهایی گیاهچه) مورد ارزیابی قرار گرفتند. نتایج آزمون‏ های آزمایشگاهی و مزرعه‏ ای نشان دادند که توده‏ های بذر از نظر خصوصیات مرتبط با بنیه بذر و گیاهچه اختلاف معنی‏ دار داشتند. همبستگی بین صفات‏ اندازه‏ گیری شده در آزمون جوانه‏ زنی استاندارد با آزمون مزرعه نشان داد که درصد جوانه‏ زنی نهایی، درصد گیاهچه نرمال و میزان استفاده از ذخایر بذر همبستگی مثبتی با درصد سبز مزرعه داشتند. در ارتباط با سرعت سبز مزرعه نیز صفات میانگین جوانه‏ زنی روزانه و سرعت جوانه‏ زنی، همبستگی مثبت و معنی‏ دار را نشان دادند. بنابراین به نظر می‏ رسد با اندازه‏ گیری صفات مذکور در آزمون جوانه‏ زنی استاندارد می‏ توان به پیش‏ بینی وضعیت سبزشدن گیاهچه‏ های عدس در مزرعه در شرایط دیم پرداخت.

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