تأثیر Azospirillum lipoferum و Azotobacter chrococoum بر آزادسازی پتاسیم خاک در کشت گلدانی سویا (Glycine max var. Williams)

نوع مقاله : علمی - پژوهشی



پتاسیم یکی از عناصر ضروری و پر مصرف برای گیاهان است. میکرو ارگانیزم های مختلف شامل برخی باکتری ها، قارچ ها، مخمرها، جلبک ها و نیز گلسنگ ها قادرند کانی های سیلیکاتی موجود در خاک را تجزیه کرده و عناصری چون پتاسیم، فسفر، آهن، روی و سیلیسیم را آزاد کنند که در این میان باکتری ها از اهمیت بیشتری برخوردارند. تحقیق حاضر با هدف بررسی تأثیر دو باکتری Azospirillum lipoferumوAzotobacter chrococoum بر قابلیت جذب پتاسیم به وسیله گیاه سویا (Glycine max var. Williams) انجام شد. آزمایش به صورت فاکتوریل در قالب طرح کاملا تصادفی شامل سه فاکتور با سه تکرار انجام شد. فاکتور اول شامل دو نوع خاک، فاکتور دوم شامل دو جنس باکتری و تیمار بدون باکتری و فاکتور سوم شامل دو سطح کود پتاسه (0 و 75 میلی گرم بر کیلوگرم از منبع کلرید پتاسیم) بود. به این منظور تأثیر تیمارها بر وزن خشک و مقدار پتاسیم جذب شده توسط گیاه سویا در مدت چهار هفته مورد بررسی قرار گرفت. نتایج نشان داد که خاک سری های گرگان و قره سو همراه با ازتوباکتر بیشترین افزایش در وزن خشک گیاه را دارند. میزان جذب پتاسیم توسط گیاه در تیمار خاک سری قره سو همراه با ازتو باکتر بیشترین بود.


عنوان مقاله [English]

Effect of Azotobacter chrococoum and Azospirillum lipoferum on the release of soil potassium in pot culture of soybean (Glycine max var. Williams)

نویسندگان [English]

  • E. Dordipour
  • A. Farshadirad
  • M. H. Arzanesh
چکیده [English]

Potassium is an essential plant macronutrient. Different microorganisms including bacteria, fungi, yeast, algae and mosses are able to decompose silicate minerals of soil and to dissolve nutrient such as K, Fe, Zn and Si, among them bacteria are more important. The aim of this study was to investigate the influence of two bacteria (Azospirillum lipoferum and Azotobacter chrococoum) on soil available potassium for soybean (Glycine max var. Williams). The experiment was conducted as a factorial in completely randomized design including three factors with three replications. The first factor includes two different soils, the second factor contains two geniuses of bacteria and without bacterial treatments and the third factor includes two KCl levels (0 and 75 mg.kg-1). To do so, treatments effects on growth and dry weight of soybean were observed over four weeks. Result showed that Gorgan and Ghareso series with Azotobacter had the highest plant dry matter. The quantity of potassium uptake by plant was the highest in Ghareso series with Azotobacter.

کلیدواژه‌ها [English]

  • Bacteria
  • Dry weight
  • Inoculation
  • Uptake
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