The Use of Plant Growth Promoting Rhizobacteria to Increase the Quality and Quantity of Button Mushrooms

The mushroom industry is one of the young and valuable industries. Since the establishment of the first edible mushroom production units, the quality and quantity of this product have been a major concern for the producers. Edible fungi, including Agaricusbisporus, are an important part of the diet in many countries. The formation of the sexual organs in the fungus requires the vegetative phase to be reproducible.Agaricusbisporus requires a layer of soil with specific physical, chemical and microbial properties to stimulate and initiate primordia.In this study, Azotobactersp. (1658PTTC) strains and Pseudomonas Putida(1694PTTC) strains were prepared from the microbial collection of the Iranian Scientific and Industrial Research Organization. Fungi were cultured on the compost at two concentrations of 1.5×10 8and 3×10 8CFU / ml. In conclusion, the results showed that in the case of Azotobacter,at least in the first flush (first harvest), the fungus had no significant effect on soil N content. It may become effective in the third flush where soil nitrogen levels decrease. However, Pseudomonas putida, at a concentration of3×108 CFU / ml in post-cold conditions, is able to increase crop yield by up to 50% in the first flash.