تاثیر کاربرد تلفیقی باکتری‌های حل کننده‌ی فسفات و کود فسفر بر رشد و عملکرد کنجد

آب و خاک

مقاله 11، دوره 29، شماره 4، مهر 1394، صفحه 991-1003   

نوع مقاله: مقالات پژوهشی

شناسه دیجیتال (DOI): 10.22067/jsw.v0i0.36272

نویسندگان

سبحه نیک‌مهر؛ عبدالرضا اخگر^*

دانشگاه ولی عصر رفسنجان

چکیده

باکتری‌های حل کننده‌ی فسفات از جمله باکتری‌های محرک رشد گیاه هستند که شکل‌های نامحلول آلی و معدنی فسفر را با مکانیسم‌های مستقیم به شکل‌های قابل دسترس تبدیل نموده و به بهبود رشد و عملکرد گیاه کمک می‌کنند. در این تحقیق اثر کاربرد باکتری‌های حل کننده فسفات و کود فسفری بر عملکرد و اجزای عملکرد گیاه روغنی کنجد مورد ارزیابی قرار گرفت. آزمایش به‌صورت فاکتوریل و در قالب طرح کاملاً تصادفی با پنج سطح فسفر (P0: بدون مصرف کود فسفر، P1: 100 کیلوگرم، P2: 200 کیلوگرم، P3: 400 کیلوگرم بر هکتار سوپرفسفات‌تریپل و P4: 1200 کیلوگرم بر هکتار خاک فسفات) و سه سطح باکتری (B0: بدون تلقیح باکتری، B1 و :B2 به ترتیب جدایه های P3 و P5 از باکتری های سودوموناس فلورسنت با توانایی بالا در حل فسفات‌های معدنی نامحلول) و سه تکرار اجرا شد. نتایج نشان داد کاربرد باکتری باعث افزایش معنی دار وزن خشک اندام هوایی شد و باکتری B1 علاوه بر این وزن خشک بذر را نیز به‌طور معنی‌داری افزایش داد. کاربرد کود فسفر وزن خشک اندام هوایی و ارتفاع ساقه را به‌طور معنی‌دار افزایش داد. هم‌چنین نتایج نشان داد کاربرد خاک فسفات، مقدار روغن بذر را به‌طور معنی‌داری افزایش داد. باکتری B2 غلظت فسفر بذر را نسبت به شاهد به‌طور معنی‌داری افزایش داد. کاربرد کود فسفر نیز جذب فسفر و روی اندام هوایی و غلظت فسفر و روی بذر را به‌طور معنی‌دار افزایش داد. کاربرد هم‌زمان خاک فسفات و باکتری حل کننده فسفات بیشتر پارامترهای اندازه‌گیری شده را مشابه کاربرد مقادیر بالای سوپرفسفات‌تریپل به‌طور معنی‌داری افزایش داد.

کلیدواژه‌ها

خاک فسفات؛ سوپر فسفات تریپل؛ سودوموناس‌ فلورسنت

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