Effect of different strains of Azotobacter chroococcum on morphophysiologic traits and yield components of rapeseed (Brassica napus L)

Document Type : Original Article

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Abstract

In order to evaluate the effect of Azotobacter chroococcum different strains on morphophysiologic characteristics, seed yield and yield components of fall rapeseed (Brassica napus L.), an experiment was conducted in Rasht. The experimental design was completely randomized block, with three replication. Investigated treatments were including seed inoculation with Azotobacter different strains (6, 9, 11, 12, 13, 14, 15, 16, 19, 21, 23, 25, 28, 35 and 38) and chemical fertilizer application (full Urea fertilizer application) and without seed inoculation conditions (control). Results showed that Azotobacter strains significantly affected on all traits except plant height, weight of 1000 seeds, stem diameter and number of secondary branches. The most distance of the first secondary branch until ground obtained by A. chroococcum strain 35, as A. chroococcum strain 14 caused the highest of silique length, dry weight, seed yield and number of seeds per silique. The most leaf erea, dry weight, seed yield and yield components caused by A. chroococcum strain 12. Generally, A. chroococcum strain 12, A. chroococcum strain 14 and A. chroococcum strain 9 had the more positive effect on traits compared with other strains. Results of this experiment showed the use of A. chroococcum increase quantitative and qualitative characteristics of canola in relation to full Urea fertilizer application and the savings in fertilizer consumption and reduce environmental degradation, therefore can be used as supplementary of chemical fertilizer.

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References

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History

  • Receive Date: 11 May 2015
  • Revise Date: 05 September 2016
  • Accept Date: 05 March 2016

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