The effects of different strains of pseuodomonas on uptake efficiency, yield

In order to evaluate the effect of Pseuodomonas different strains on nutrients uptake efficacy and rice yield, an experiment was arranged in Rice Researches Institute of Guilan Province (Rasht) during 2009. The experiment design consisted of four randomized complete blocks in a factorial arrangement. In this research, two factors were evaluated: first, two cultivars (Khazar and Hashemi) and second, eight levels of seed inoculation with PGPB strains (168, 93, 177, 136, 103, 169, 4 and control (without inoculation)). Investigated characteristics consisted of: nitrogen consumption efficacy, phosphorus consumption efficacy, potassium consumption efficacy, phosphorus harvest index, apparent recovery efficacy of nitrogen and phosphorus, physiological efficavy of nitrogen and phosphorus, agronomic efficacy of nitrogen and phosphorus, yield and yield components (number of seed per panicle, number of panicle per panicle and 1000-seed weight). In this experiment, effect of bacteria were significant in the most of studied characteristics. The results of experiment showed that inoculation with bacterial strains had a significant effect on rice cultivars, so Khazar had better response on the most of studied characteristics in compared with Hashemi. Between bacterial different strains, seed inoculation with 168 strain in compared with other strains increased evaluated characteristics significantly. The findings of this research showed that PGPB can interact positively in promoting plant growth, As well as nutrients uptake of rice plants in soil especially P and too, increase the solubility of ions through increased enzymes activity and production of growth hormones that consequently, leading to improved yield.