اثر سطوح مختلف کود نیتروژن بر رشد رویشی و زایشی گیاه دارویی همیشه بهار (Calendula officinalis L.)

بوم شناسی گیاهان زراعی

مقاله 12، دوره 9، شماره 1 - شماره پیاپی 30، اردیبهشت 1392، صفحه 1-10   

نوع مقاله: پژوهشی

نویسندگان

فرزانه بهادری¹؛ محمد کاظمی²؛ الهام مرتضی^{* 3}

¹عضو هیأت علمی مرکز تحقیقات کشاورزی و منابع طبیعی استان سمنان

²عضو هیأت علمی سازمان تحقیقات و آموزش کشاورزی استان سمنان

³عضو باشگاه پژوهشگران جوان دانشگاه آزاد اسلامی واحد شهر قدس

چکیده

به منظور بررسی اثر سطوح مختلف کود نیتروژن بر عملکرد رویشی و زایشی گیاه دارویی همیشه­بهار، آزمایشی در قالب طرح بلوک­های کامل تصادفی با سه تکرار در ایستگاه تحقیقات گیاهان دارویی سمنان اجرا شد. تیمارها شامل کاربرد چهار سطح کود نیتروژن از منبع نیترات آمونیوم ( (شاهد) 0، 100، 200 و 400 کیلوگرم در هکتار) بودند که در سه مرحله رشد گیاه استفاده شدند. صفات اندازه­گیری شده شامل وزن‎تر و خشک اندام هوایی، وزن تر و خشک برگ، وزن تر و خشک ساقه، ارتفاع گیاه، قطر تاج­پوشش، قطر گل و وزن‎تر و خشک گل بودند. نتایج نشان داد که اثر کود نیترات آمونیوم به استثنای ارتفاع گیاه و وزن خشک اندام هوایی، بر همه صفات معنی­دار بود. کاربرد کود، صفات رویشی و زایشی گیاه همیشه بهار را افزایش داد. بیشترین وزن خشک گل با کاربرد 400 کیلوگرم کود از منبع نیترات­آمونیوم به‎دست آمد. با توجه به این نکته که گل­های همیشه­بهار، اندام اقتصادی آن است، بنابراین کاربرد تیمار 400 کیلوگرم در هکتار کود از منبع نیترات آمونیوم بهترین سطح کودی توصیه شده به منظور کسب بیشترین وزن خشک گل همیشه­بهار می‎باشد.

کلیدواژه‌ها

همیشه بهار؛ کود؛ رشد رویشی؛ رشد زایشی؛ عملکرد

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