استفاده از باکتری گرم مثبت حل‌کننده فسفر Bacillus aryabhattai در استخر پرورش ماهیان گرمابی به‌منظور کاهش مصرف کود شیمیایی فسفره

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه شیلات، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس، نور، ایران

2 گروه شیلات، دانشکده کشاورزی و منابع طبیعی، موسسه آموزش عالی آزاد خزر، محمودآباد، ایران

10.22034/aej.2021.297440.2591

چکیده

هدف از این تحقیق، بررسی امکان جایگزینی کود شیمیایی سوپرفسفات تریپل با کودهای زیستی به‌عنوان یک رویکرد دوستدار محیط‌زیست بود. اثر کاربرد جداگانه و تلفیقی کود زیستی و شیمیایی در شرایط میکروکازم (ارلن حاوی رسوب) مورد ارزیابی قرار گرفت. بدین منظور، باکتری گرم مثبت حل‌کننده فسفات 3SB.P Bacillus aryabhattai strain در دو سطح تلقیح و عدم تلقیح و کود فسفات در 4 سطح 0، 30، 70 و 100 درصد استفاده شد. در این آزمایش، فسفر محلول،pH و تراکم باکتری‌های حل‌کننده فسفر در زمان های مختلف (در روزهای صفر (قبل از تلقیح)، 2، 5، 10، 15 و 20 روز بعد از تلقیح) مورد سنجش قرار گرفت. نتایج نشان داد که تراکم باکتری در طی آزمایش در همه گروه ها ابتدا دارای یک روند افزایشی سپس کاهشی و مجدداً کمی افزایشی بود. تیمار 6 (70 درصد کود+ باکتری) دارای بیشترین تراکم باکتری بودکه در برخی بازه‌های زمانی اختلاف معنی داری با سایر تیمارها داشت. میزان فسفات محلول آب در همه گروه‌ها ابتدا دارای یک روند افزایشی سپس کاهشی و مجدداً افزایشی بود. در بازه‌های زمانی مختلف، تفاوت معنی داری در میانگین فسفر محلول در تیمارها با شاهد مشاهده نشد. تغییرات pH تیمارها حاکی از روند سینوسی در بازه های مختلف می‌باشد. با وجود این که باکتری‌ها در شرایط میکروکازم به‌خوبی رشد کردند و تثبیت مناسبی در محیط نشان دادند اما نتایج نشان داد که کود شیمیایی و باکتری حل‌کننده فسفر اثر معنی داری بر نوسانات فسفر محلول نداشتند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Use of gram-positive phosphate solubilizing bacterium Bacillus aryabhattai in warm-water fishpond to reduce the application of phosphorus chemical fertilizer

نویسندگان [English]

  • Nemat Mahmoudi 1
  • Mehdi Goli 2
  • Mohammadreza Bivareh 1
  • Mina Jalali 1
  • Rana Dashtbin 1
1 Department of Aquaculture, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Nur, Iran
2 2Department of Fisheries, Faculty of Agriculture and Natural Resources Science, Khazar Institute of Higher Education, Mahmudabad, Iran
چکیده [English]

The aim of this study was to investigate the possibility of replacing Triple superphosphate chemical fertilizer with biofertilizers as an environmentally friendly approach. The effect of separate and combined triple superphosphate and biofertilizer application under microcosm (Erlenmeyer contains sediment) was evaluated. Gram-positive Phosphate solubilizing bacteria Bacillus aryabhattai strain SB.P3 was used in two levels of inoculation and non-inoculation, and phosphate fertilizer in 4 levels of 0, 30, 70 and 100%. In this experiment, soluble phosphorus, pH and density of solvent bacteria were measured at different times (on days zero (before inoculation), 2, 5, 10, 15 and 20 days after inoculation). The results showed that the bacterial density during the experiment in all groups, in first had an increasing trend, then decreased, and again slightly increased. Treatment 6 (70% fertilizer + bacteria) had the highest bacterial density, which in some time periods was significantly different from other treatments. The amount of water soluble phosphate in all groups at first had an increasing trend, then decreased and then increased again. At different time intervals, no significant difference was observed in the mean of dissolved phosphorus in the treatments with the control. Changes in pH of the treatments indicate a sinusoidal trend in different intervals. Although the bacteria grew well under microcosm and showed good stability in the environment, the results showed that chemical fertilizers and phosphate solubilizing bacteria didn't have a significant effect on fluctuations in soluble phosphorus.

کلیدواژه‌ها [English]

  • Phosphate solubilizing bacteria
  • Chemical fertilizers
  • Phosphorus
  • Warm-water fishpond
  • Sustainable aquaculture

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فصلنامه محیط زیست جانوری
دوره 14، شماره 3
آبان 1401
صفحه 207-212

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