عنوان

ارزیابی اهمیت اکولوژیک و فیزیولوژیک ازتوباکتر در چند منطقه مرتعی در آذربایجان شرقی

شماره

‭۵۵۶۵پ‬

زبان متن نوشتاري يا گفتاري و مانند آن

per

عنوان اصلي

ارزیابی اهمیت اکولوژیک و فیزیولوژیک ازتوباکتر در چند منطقه مرتعی در آذربایجان شرقی

نام نخستين پديدآور

/زهرا مهرفر

نام ناشر، پخش کننده و غيره

تبریز : دانشگاه تبریز ، دانشکده علوم طبیعی

نام توليد کننده

، ن.ا

نام خاص و کميت اثر

‮‭۷۸‬ ص‬

متن يادداشت

چاپی

متن يادداشت

فاقد اطلاعات کامل

جزئيات پايان نامه و نوع درجه آن

کارشناسی ارشد

نظم درجات

رشته علوم گیاهی

زمان اعطا مدرک

‮‭۱۳۸۱/۱۰/۲۵‬

کسي که مدرک را اعطا کرده

تبریز : دانشگاه تبریز ، دانشکده علوم طبیعی

متن يادداشت

‮‭Azotobacter is one of N۲-fixing free-living bacteria which is used as a biofertilizer in some countries. In this research the relationship between population of A. chroococcum in two sites in Azarbaijan ( Mishou-dagh and Khajdeh ) and various soil factors and the type of vegetation were investigated. Results showed that in Mishou-dagh population of Azotobacter was positively correlated with the type of vegetation and amount of organic carbon in soil. Soil pH in Khajdeh showed a significant negative correlation with the population of bacteria. In this area, similar to Mishou-dagh, the population of bacteria showed significant positive correlation with the amount of organic carbon. In comparsion with Khajdeh the population of Azotobactr in Mishou-dagh was higher than that in Khajdeh which could be attributed to the higher amount of organic cabon in soil and neutral pH in Mishou-dagh In this reaserch the effect of inoculation of rhizosphere with soil-isolated A.chroococcum on growth of wheat ( Triticum aestivum L.cv.Omid ) during ۵۶ days of its growth in a pot experment was also investigated. Results showed that growth of wheat plants inoculation with Azotobacter ( +A plants ) was similar to amonium nitrate-fed and higher than control plants. A higher effect of +A /+N treatments on the growth of shoot ( intendence ) and root ( significant ) comparing to +A and +N plants was attributed not only the suplementery nitrogen supply by bacteria and fertilizer, but also to the hormon production ( e. g. cytockinins ) by the bacteria. Simiar, higher chlorophyll concentration in +A plants, compared to the +N plants, could be attributed to the bacteria-drived cytockinin. A higher K ( and N ) transport to the shoot and consequently lower root proportional K and Ca in +A plants in comparsion with +A and +A/+N plants, clearly showed that +A treatment stimulate nutrients trasport to the shoot‬

مستند نام اشخاص تاييد نشده

مهرفر، زهرا

مستند نام اشخاص تاييد نشده

نیشابوری،اصغر، استاد راهنما

مستند نام اشخاص تاييد نشده

حاجی بلند، رقیه، استاد راهنما

مستند نام اشخاص تاييد نشده

علی اصغر زاده،ناصر، استاد مشاور

مستند نام اشخاص تاييد نشده

اکبری، سیامک، استاد مشاور

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