اثر باکتری‌های محرک رشد بر صفات رویشی و عناصر تغذیه‌ای نونهال‌های فندق (Corylus avellana) در نهالستان فندقلوی اردبیل

نوع مقاله: علمی- پژوهشی

نویسندگان

1 دانشجوی دکتری جنگل‌داری، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس، نور، ایران

2 استاد، گروه جنگلداری، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس، نور، ایران

3 استادیار پژوهش، مؤسسه تحقیقات خاک و آب، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

4 دانشیار پژوهش، مؤسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

چکیده

هدف از پژوهش پیش‌رو، بررسی تأثیر باکتری‌های محرک رشد بر صفات رویشی (ارتفاع، قطر یقه، وزن خشک اندام زمینی و هوایی، زی‌توده خشک کل نونهال و شاخص کیفیت نونهال) و غلظت عناصر غذایی (نیتروژن، فسفر، پتاسیم، آهن و روی) در برگ نونهال‌های فندق (Corylus avellanaL.) بود. در شرایط نهالستان، تأثیر سه نوع باکتری Pseudomonas putida، Bacillus subtilis و Enterobacter cloacae به‌صورت مجزا و ترکیبی به‌مدت هفت ماه بر نونهال‌های فندق در گلدان‌های پلی‌اتیلنی حاوی خاک اتوکلاوشده بررسی شد. بر اساس نتایج، بیشترین اندازه ارتفاع، قطر یقه و سطح برگ به‌ترتیب با 26/88 سانتی‌متر، 7/17 میلی‌متر و 23/87 سانتی‌متر مربع و بیشترین غلظت نیتروژن (2/81 درصد) در تلقیح ترکیبی سه باکتری مشاهده شد. بیشترین وزن خشک ریشه، حجم ریشه، وزن خشک اندام هوایی، زی‌توده خشک کل نونهال، شاخص کیفیت نونهال و بیشترین غلظت فسفر با تلقیح مجزای باکتری P. putida به‌دست آمد. بیشترین مقدار غلظت آهن و روی به‌ترتیب در تلقیح با باکتری B. subtilis و P. putidaمشاهده شد. در حالت کلی، با توجه به تأثیر مثبت باکتری‌های محرک رشد در جذب عناصر غذایی، افزایش رشد قطری، ارتفاعی و شاخص‌های ریخت‌شناسی دیگر، به‌ترتیب باکتری‌های P. putida، B. subtilis و E. cloacae برای تلقیح نونهال‌های فندق توصیه می‌شوند. درحقیقت، تجهیز ریشه نونهال‌ها با باکتری‌های محرک رشد (مهندسی ریشه) می‌تواند راهکاری مناسب برای تولید نهال سالم و قوی در نهالستان و همچنین افزایش موفقیت نهال‌کاری در رویشگاه‌های آشفته و تخریب‌یافته این گونه باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of Growth Promoting Rhizobacteria on growth and nutrient elements of common hazelnut (Corylus avellana L.) seedlings in Ardabil Fandoqlou nursery

نویسندگان [English]

  • Yunes Rostamikia 1
  • Masoud Tabari Kouchaksaraei 2
  • Ahmad Asgharzadeh 3
  • Ahmad Rahmani 4
1 Ph.D. Student Forestry, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor, Iran
2 Prof., Department of Forestry, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor, Iran
3 Assistant Prof., Soil and Water Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran
4 Associate Prof., Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran
چکیده [English]

The aim of present research was to investigate the effects of Growth Promoting Rhizobacteria on growth (height, collar diameter, dry weight of root and shoot, total dry biomass and quality index of seedling) and nutrient absorption (N, P, K, Fe and Zn) in leaf of common hazelnut (Corylus avellana L.) For this purpose, effects of three bacteria including Pseudomonas putida, Bacillus subtilis and Enterobacter cloacae, alone and together, for 7 months on filbert seedling in pots containing of autoclaved soil under nursery conditions were evaluated. The results showed that the greatest height (26.88 cm), collar diameter (7.17 mm), leaf area index (23.87 cm2/g) and N concentration (2.81%) were observed for seedlings inoculated with all bacterial. The biggest root dry weight, root volume, seedling quality index and P concentration were observed in seedlings inoculated with P. putida (alone). The highest Fe and Zn were obtained in seedlings inoculated with B. subtilis and P. putida, respectively. Generally, according to beneficial effects of Growth Promoting Rhizobacteria on absorption of nutrient elements and morphologic growth, P. putida, B. subtilis and E. cloacae are recommended for seedling inoculation, respectively. In fact, inoculation of root with Growth Promoting Rhizobacteria (root engineering) can be an appropriate approach to produce healthy and strong seedlings in nursery and increasing success of plantation in disturbed and degraded habitats.

کلیدواژه‌ها [English]

  • Bacteria inoculation
  • hazelnut
  • Growth
  • quality index of seedling

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