effect of the integration in phosphate fertilizer different levels and phosphate solubilizing bacteria on forage quantitative and qualitative of two barley cultivars

in order to investigate the integration of phosphorus fertilizer different levels and phosphorus solubilizing bacteria p.fluorescens on quantitative and qualitative forage yield of two fall barley cultivars, an experiment carried out at research farm of college of agriculture of university of tehran during 2009-2010. the experiment design consisted of three randomized complete blocks in a factorial arrangement. experimental factors consisted of phosphorus fertilizer different levels and phosphorus solubilizing bacteria included from 100% recommended phosphorus fertilizer and without seed inoculation, without phosphorus fertilizer and without seed inoculation (control), seed inoculation and with application of 100% phosphorus fertilizer recommended, seed inoculation and with application of 75% phosphorus fertilizer recommended, seed inoculation and with application of 50% phosphorus fertilizer recommended, and cultivars included of fasih and bahman. the highest of dry and fresh forage yield obtained in without inoculation with 100% fertilizer. seed inoculation with 100% triple super phosphate fertilizer showed that maximum of number of leaf in plant, number of tiller, leaf dry weight and leaf/stem ratio, while the lowest of them observed in control. as regards forage quality, seed inoculation with 75% triple super phosphate fertilizer showed the highest percent of dry matter digestibility, water soluble carbohydrates and total ash, while the lowest of them observed in control. the highest percent of crude protein and fiber observed in seed inoculation with 100% triple super phosphate fertilizer and without triple super phosphate fertilizer and without seed inoculation (control), respectively. between cultivars, fasih had the highest of height, no. leaf in plant, spike height, leaf dried weight, stem dried weight, percent of dry matter digestibility, percent of water soluble carbohydrates percent of crude protein and total ash, and in the remain of investigated characteristics, bahman had the highest of them. the present finding showed that  seed inoculation with phosphorus solubilizing bacteria p.fluorescens in integrated with chemical fertilizers improved forage quantity and quality.