اثر تلقیح باکتری های افزاینده رشد گیاه بر رشد و جذب عناصر غذایی ذرت دانه‌ای (هیبرید سینگل کراس 704)

نوع مقاله: مقاله پژوهشی

نویسندگان

1 استادیار/ دانشگاه آزاد اسلامی واحد لاهیجان

2 دانشیار موسسه تحقیقات خاک و آب کشور

3 عضو هئیت علمی

چکیده

به منظور ارزیابی اثر 8 جدایه برتر از گونه های سودوموناس، باسیلوس و ریزوبیوم (Pf54، Pf12 ، Pf39، Pf29، Bv1، Bv2، Rm42 و Rm43) بر عملکرد و جذب عناصر غذایی ذرت، آزمایشی با 12 تیمارشامل 8 جدایه و همچنین مخلوط جدایه های سودوموناس فلورسنت، ریزوبیوم و باسیلوس (T9)، شاهد منفی بدون کود و تلقیح (T10)، تیمار کم نهاده شیمیایی (50 درصد توصیه کودی) (T11) و تیمار شیمیایی توصیه کودی کامل(T12)، در قالب طرح بلوک‌های کامل تصادفی در سه تکرار در شرایط گلخانه‌ای در شهر کرج انجام گردید. نتایج آزمایش نشان داد که گیاهان تیمارهای PF12، BV1 ، pf54 و T9 بیشترین ارتفاع بوته را داشتند. بیشترین جذب نیتروژن به ترتیب در تیمارهای RM43 و تلفیق جدایه ها مشاهده شد. فسفر جذب شده گیاهان تیمار شده باکتری های باسیلوس سه و نیم برابر شاهد افزایش یافت. جذب فسفر گیاهان سطوح تیمار مخلوط باکتری ها و نیز کاربرد باکتری های ریزوبیوم بطور مجزا، دو و نیم برابر تیمار شاهد بود. تیمار PF54 بیشترین غلظت آهن اندام هوایی ذرت را داشت. کاربرد باکتری های مورد استفاده در این آزمایش بطور معنی داری نیاز گیاه به عناصر نیتروژن، آهن، منگنز و روی را تامین کرد که باکتری های جنس باسیلوس موثر ترین باکتری در این میان بودند.

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