اثر تلقیح بذر با باکتری‌های افزاینده رشد گیاهی (PGPR) بر کیفیت و عملکرد علوفه شلغم علوفه‌ای (Brassica rapa L.) در مقادیر مختلف کودهای نیتروژن و فسفر

نوع مقاله : مقاله علمی-پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد زراعت، گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه گیلان، رشت

2 استادیار گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه گیلان، رشت

3 پژوهشگر مؤسسه تحقیقات برنج کشور

چکیده

به­منظور بررسی تأثیر باکتری­های ازتوباکتر و سودوموناس و سطوح مختلف کودهای شیمیایی نیتروژن و فسفر بر کیفیت و عملکرد علوفه شلغم علوفه­ای (Brassica rapa L.)آزمایشی در سال زراعی 91-1390 در مزرعه­ی پژوهشی موسسه ­ی تحقیقات برنج کشور (رشت) در قالب طرح بلوک­های کامل تصادفی با 14 تیمار و سه تکرار اجرا شد.عوامل آزمایشی شامل دو باکتری ازتوباکتر کروکوکوم سویه 12 و سودوموناس فلورسنس سویه 41 و کودهای شیمیایی نیتروژن و فسفر هر کدام در 4 سطح (صفر، 50، 75 و 100 درصد کود مورد نیاز) بودند. نتایج این پژوهش نشان داد که بیش­ترین میزان عملکرد تر و خشک علوفه، شاخص­های کیفی شاخساره و ریشه گیاه شلغم علوفه­ای در کاربرد تلفیقی کودهای زیستی و شیمیایی به­ویژه تیمار تلفیقی ازتوباکتر + سودوموناس + 50% کود شیمیایی فسفر و نیتروژن به­دست آمد. بنابراین می­توان تأمین نیتروژن و فسفر مورد نیاز گیاه از طریق سیستم تلفیقی کودهای زیستی و 50% کودهای شیمیایی را به­عنوان تیمار برتر و گامی در راستای کاهش مصرف نهاده­های شیمیایی و تحقق اهداف کشاورزی پایدار معرفی نمود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of seed inoculation with Plant Growth Promoting Rhizobacteria (PGPR) on forage quality and yield of turnip (Brassica rapa L.) at the different values of nitrogen and phosphorus fertilizers

نویسندگان [English]

  • Azam Roumani 1
  • Seyed MohammadReza Ehteshami 2
  • Mohammad Rabiei 3
چکیده [English]

To investigate the effect of Azotobacter and Pseudomonas bacteria and different levels of nitrogen and phosphorus fertilizers on forage yield and quality of turnip (Brassica rapa L.), a field experiment was conducted at Rice Research Institute of Iran during 2012 growing season. The experiment was arranged base on randomized complete block design with 14 treatments and three replications. The experimental factors were including Azotobacter chroococcum strain 12 and Pseudomonas fluorescens strain 41 bacteria and four levels (0, 50, 75 and 100 percent of required nutrient) of nitrogen and phosphorus fertilizers. The highest amount of fresh and dry forage yield, quality characteristic in shoot and root of forage turnip obtained in integrated application of biofertilizers and chemical fertilizers, particularly, inoculation with A. chroococcum strain 12 + P. fluorescens strain 41 + 50% nitrogen and phosphorus fertilizer. Therefore, can provide to involve nitrogen and phosphorus of plant by integrated system of biofertilizers and 50% chemical fertilizer introduces as superior treatment and step to reduces chemical inputs consumption and realization of aims in sustainable agriculture.

کلیدواژه‌ها [English]

  • Azotobacter
  • Pseudomonas
  • Fertilizer integrated application
  • Forage dry matter digestibility

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