عنوان مقاله [English]
نویسندگان [English]چکیده [English]
In order to evaluate the effect of biological and chemical fertilizers application on nutrients concentration and growth characteristicsof forage turnip, an experiment was conducted at Rice Research Institute in 2012. The experiment was arranged base on randomized complete block design with three replications. Treatments were involved 14 levels: control (no fertilizer and uninoculation), chemical fertilizer and uninoculation, inoculation with Azotobacter chroococcum strain 12 + (0, 50, 75 and 100 percent nitrogen), inoculated with Pseudomonas fluorescens strain 41 + (0, 50, 75 and 100 percent phosphorus) and inoculated with P. fluorescens strain 41 + A. chroococcum strain 12 + (0, 50, 75 and 100 percent N.P). The results of experiment showed that the concentration of Cu, Mg, Mn, Fe and P in shoots and tubers of plants and forage yield, leaf area index, plant height and content of chlorophyll a and b affected by different treatments. The highest nutrients concentration and growth characteristic obtained from inoculation with Azotobacter and Pseudomonas and 50% of nitrogen and phosphorus fertilizers. Overall, seed inoculation with biofertilizers reduced nitrogen and phosphorous containing chemical fertilizers up to 50%.