Investigating storage capacity and stem reserves contribution rate of triticale affected by seed inoculation with growth promoting rhizobacteria and nitrogen fertilizer timing

Subject Areas : Journal of Plant Ecophysiology

N. Hasanzadeh ¹ , R. Seyed Sharifi ² , M. Sedghi ³

1 - دانشجوی کارشناسی ارشد، دانشگاه محقق اردبیلی
2 - دانشیار دانشگاه محقق اردبیلی
3 - دانشیار دانشگاه محقق اردبیلی

Received: 2014-09-24 Accepted : 2014-09-24 Published : 2014-09-01

Keywords:

Abstract :

During the past few years due to disclosure of adverse effects caused by indiscriminate application of chemical fertilizers and their ascending price, application of biological fertilizers has been suggested in agriculture. Using biological fertilizers containing different microbial strains, leads to less chemical fertilizers application and consequently high quality products with no harmful chemicals for human health are produced. In order to investigate the effect of seed inoculation with plant growth promoting rhizobacteria and nitrogen fertilizer timing on grain yield and plants reserves contribution rate of triticale, a factorial experiment was conducted based on randomized complete block design, with three replications during 2012, in green house of agriculture college at university of Mohaghegh Ardabili. The first factor was nitrogen fertilizer timing in four levels including (1/2 in planting time + 1/2 during stem elongation), (1/3 in planting time + 1/3 during stem elongation + 1/3 before panicle appearance), (1/4 in planting time + 1/2 during stem elongation + 1/4 during panicle growth) and (1/4 in planting time + 1/4 during tilling stage + 1/4 during stem elongation + 1/4 during panicle growth). The second factor was seed inoculation with growth promoting rhizobacteria in four levels including no-inoculation, Azotobacter chroococcum, strain 5, Azospirillum lipoferum, strain of and Pseudomonas putida, strain 4. Results indicated that the interaction of bacterial inoculation and nitrogen fertilizer timing was significant in all measured traits. The least dry matter remobilization from shoot (0.089 grams per plant) and stem (0.0677 grams per plant) and their contribution in grain yield (16.79 percent) was related to seed inoculation with Azotobacter in the fourth nitrogen timing level and the most values for these traits were acquired in no seed inoculation and the second nitrogen timing level. The highest yield and yield components were acquired by seed inoculation with Azotobacter and the second nitrogen fertilizer timing level.