تأثیر سویه ­های مختلف باکتری حل کننده فسفات Pseudomonas putida بر کمیت و کیفیت علوفه ارقام سورگوم در ورامین

   In order to investigate two different strains of Pseudomonas putida on forage quantity and quality of three sorghum cultivars, an experiment was carried out at Agricultural and Natural Resource Research Center of Tehran Province (Varamin) during 2009-2010. The experiment design consisted of three randomized complete blocks in a factorial arrangement. Seed inoculation with Pseudomonas putida strain 168 had the highest wet and dried forage, percent of dry matter digestibility and percent of crude protein and seed inoculation with Pseudomonas putida strain 41 had the highest percentage of Water Soluble Carbohydrates. Seed inoculation with Pseudomonas putida strain 168 had the highest amount in the most of investigated characteristics seed co-inoculation with two bacterial strains had the lowest amount. The results showed that two strains of phosphate solubilizing bacteria had antagonistic effect on, however seed inoculation with bacterial strains alone (especially strain 168) caused nutrient uptake and plant growth promotion consequently, exuding of second metabolites could lead to plant yield promotion.