Effects of Integrated Use of Different Combinations of Fertilizers and Biofertilizers on Spring Safflower

In order to evaluate the effects of dual inoculation of Azotobacter and Mycorrhiza with nitrogen and phosphorus levels on some traits of spring safflower, this study was carried out in the form of factorial in a randomized complete block design with three replications in experimental field of Farahan University in Markazi province of Iran during spring seasons of 2006 and 2007 years. Inoculation of Azotobacter (with and without inoculation: A , A ) and Mycorrhiza (with and without inoculation: M , M ) with nitrogen and phosphorus 01 0 1 levels (F = N + P (kg ha ), F1= N + P (kg ha ), F = N + P (kg ha ) and F = N + P (kg ha )) have been 0 0 0 50 25 2 100 50 3 150 75 111 1 studied. Results indicated that treatment Y A M F with oil yield (426.8 kg ha ) and treatment Y A M F with 2 0 1 3 1 0 1 0 1 oil yield (218 kg ha ) were significantly superior to the other treatments and according to calculated, 1 inoculation seeds in planting date with Azotobacter and Mycorrhiza to cause increase oil yield about 3.84 percent in compare with control treatment. Results from the present study indicated that grain yield and yield components of safflower have been affected significantly by the inoculation with Azotobacter and Mycorrhiza, because these bio-fertilizers can fix the atmospheric nitrogen and increase phosphorus availability in soil and enhance absorb elements by plant.