Effects of Bio - and Chemical F ert ilizers on growth and yield of F aba bean ( Vicia faba L.)

To study the effect of chem ical and biological fertilizers of phosphorus and nitrogen on growth and yield of faba bean an experiment was carry out as split - split - plot with three replications in Bazkiagorab, Lahijan. The main factor was the composition of nitrogen and phosphorous fertilizers on five levels: 1 - control (no consumption of mineral fertilizers), 2 - 35 TSP+50 urea kg/ha, 3 - 35 TSP+100 urea kg/ha, 4 - 17.5 TSP+50 Urea kg/ha, 5 - 17.5 TSP+100 Urea kg/ha, other factors were a the phosphorus biological fertilizer and b - nitrogen bi ological fertilizer as inoculated and non - inoculated. The results showed that the grain yield, grain weight, biological yield, harvested index and plant height significantly affected by using chemic al and biological fertilizers, but the length and width of pods and length of seeds was not different significantly. The highest grain yield, 3.41 tons/ha, and weight of 100 grain, observed in treatments using inorganic fertilizer (35 TSP+100 Urea kg/ha) + nitrogen bio - fertilizer and without phosphorus bio - fertil izer but the lowest grain yield was obtained in control treatment with 2.45 tons/ha. The highest plant height, 174.63 cm, was obtained in the nitrogen biological fertilizer treatment. Use of chemical fertilizer was significantly increased harvested index t han control treatment and the highest HI was obtained in 35 TSP+50 urea kg/ha.