Effect of biofertilizer inoculation on mineral elements absorption in forage corn SC 540 under humidity different regimes

In order to investigate the effect of different levels of biofertilizer inoculation and phosphorus chemical fertilizer on mineral elements absorption in forage corn SC. 540 under humidity regimes، an experiment was conducted as Line source based on a randomized completele block design with three replications during two growing seasons of 2012 and 2013. The implementation of Line source was applied four levels of irrigation (not stress، mild stress، moderate stress، severe stress). Five phosphorus levels included the application of 100 percent triple super phosphate fertilizer and without biofertilizer، 75 percent recommended chemical fertilizer with biofertilizer، 50 percent recommended chemical fertilizer with biofertilizer، 25 percent recommended chemical fertilizer with biofertilizer، biofertilizer and without chemical fertilizer، too. The results of experiment showed significant differences of fertilizer treatment in most of studied traits in the first and second of year. The highest of fresh and dry forage yield obtained to apply treatment of 100 percent triple super phosphate fertilizer and without biofertilizer that this value wasn’t statistically significant difference with 75 percent recommended chemical fertilizer and biofertilizer. The mineral elements absorption decreased with increasing of stress condition. The highest amount of absorption of phosphors recorded in 75 percent recommended chemical fertilizer with biofertilizer، although in stress condition، the highest amount of absorption of phosphor recorded in 50 percent recommended chemical fertilizer with biofertilizer.