Cropping systems in farmland areas of Iran are characterized by consumption of chemical fertilizers (C).Leading to serious erosion and fertility decline. Information regarding the influence, of bio organic.Fertilizers (O) and C on pumpkin traits is not available. Therefore a field, experiment was conducted at.Research farm of Kurdistan University in 2009. Fourteen compositions, of bio O and C were done as.Treatments. Results indicated that the maximum seed yield (118.5 g m-2), oil yield (43.31 g m-2) and fruit.Yield (6056.2 g m-1) were obtained with treatment that pumpkin seeds inoculated with free-living.Nitrogen fixing bacteria (NO) and phosphate solubilizing bacteria (PO) + 50% organic fertilizer. Oil.Percentage responded to fertilizer treatments and the maximum oil percentage (48.15%) was obtained at.Treatment that pumpkin seeds inoculated with PSB + 50% chemical fertilizer. The fertilizer treatments.Had no significant effects on the 1000 seeds weight and fruit number per plant. It is concluded that.Application of Biofertilizers with 50% chemical and organic fertilizers (CO), reduced the need for C and.Produced, higher oil seed and fruit yield.
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