تأثیر ازوتوباکتر کرووکوکوم و سطوح مختلف کود نیتروژن بر خواص فیتوشیمیایی و عملکرد سرخارگل (Echinacea purpurea L. Moench)
Subject Areas : Journal of Ornamental Plantsسیده آمنه سجادی 1 , زهرا اسپیدکار 2 , آوید رضوی 3 , شهرام مهری 4
1 - گروه زراعت،واحد رشت،دانشگاه ازاد اسلامی،رشت،ایران
2 - گروه زراعت و اصلاح نباتات، واحد آستارا، دانشگاه آزاد اسلامی، آستارا، ایران
3 - گروه زراعت، واحد رشت، دانشگاه آزاد اسلامی، رشت، ایران
4 - گروه کشاورزی، واحد پارس آبادمغان، دانشگاه آزاد اسلامی، پارس آبادمغان، ایران
Keywords: کود بیولوژیک, نیتروژن, کودهای شیمیایی, گیاه زینتی, عملکرد بیولوژیکی,
Abstract :
بهمنظور بررسی تأثیر کودهای بیولوژیک و شیمیایی بر عملکرد کمی و کیفی سرخارگل، یک آزمایش بهصورت زراعی در مزرعه تحقیقات پارس آباد اردبیل انجام شد. آزمایش بهصورت فاکتوریل در قالب طرح بلوک کامل تصادفی با چهار تکرار انجام شد. فاکتورهای آزمایش شامل کود نیتروژن (N0 = 0، N1 = 75 و N2 = 150 کیلوگرم در هکتار از منبع اوره) و باکتری ازوتوباکتر (B1 = تلقیح با Azotobacter chroococcum سویه SW22 و B0 = عدم تلفیح) بود. صفات مورفولوژیکی مانند ارتفاع گیاه، تعداد شاخههای جانبی، وزن تر و خشک اندام هوایی، وزن خشک و خشک ریشه، تعداد گل در گیاه و صفات فیزیولوژیک مانند فنل، نیتروژن (N) و غلظت فسفر (P) اندازه گیری شد. نتایج نشان داد که تیمارها اثر معنیدار بر پارامترهای رشد داشتند. تلقیح با آزوتوباکتر + 75 کیلوگرم نیتروژن در هکتار در مقایسه با شاهد بیشترین وزن خشک شاخساره (42/40 درصد)، وزن خشک ریشه (02/60 درصد) و تعداد گل (68/65 درصد) را نشان داد. علاوه بر این، در گیاهان تیمار شده با ازوتوباکتر + 75 کیلوگرم نیتروژن در هکتار، غلظت فنل، N و P به ترتیب 11/25 درصد، 6/34 درصد و 8/39 درصد نسبت به شاهد افزایش دادند نتایج حاکی از آن است که استفاده از کودهای بیولوژیکی گزینه خوبی برای کاهش استفاده از کودهای شیمیایی و ابزاری مهم برای کمک به کشاورزی پایدار است.
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