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

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.