Effect of seed biopriming with plant growth promoting rhizobacteria (PGPR) on yield and dry matter accumulation of spring barley (Hordeum vulgare L.) at various levels of nitrogen and phosphorus fertilizers.

摘要

In order to study the effects of PGPR at various levels of nitrogen and phosphorus fertilizers on yield and dry matter accumulation of barley, an experiment was conducted at the Research Farm of Islamic Azad University, Ardabil Branch, during 2009-2010 cropping. The combination of nitrogen (N 0, 40 and 80 kg/ha as urea) and phosphorus (P₂O₅ 0, 30 and 60 kg/ha) fertilizers were factorially assigned to the main plots and seed biopriming with plant growth promoting rhizobacteria in four levels (no priming, seed biopriming with Azotobacter chroococcum strain 5, Azospirillum lipoferum strain OF and combination of seed biopriming with Azotobacter+Azospirillum) were assigned to the subplots. The results showed that yield and dry matter accumulation were significantly affected by nitrogen and phosphorus fertilizer levels and seed priming with PGPR. With increasing of nitrogen and phosphorus levels and seed priming with PGPR, yield and dry matter accumulation were increased. Maximum 1000 grain weight, grain yield, biological yield and harvest index were obtained in the plots which was applied the highest levels of nitrogen and phosphorus fertilizers in seed priming with both Azospirillum+Azotobacter compared to control treatment and minimum was obtained in control treatment.