Journal of Pure and Applied MicrobiologyVol. 3 No. 2

Rhizobia as Biofertilizer for Oyster Mushroom Cultivation

Gh. Peyvast¹*, J.A. Olfati², A. Kariminia³ and A. Fallah4

1,2Department of Horticultural, ³Department of Soil Sciences, University of Guilan, Km 12 Rasht-Qazvin Broadcast, Rasht, Iran. 4Soil and Water Institute, Tehran, Iran.

Received on 09 April 2009 and accepted on 16 May 2009



Rhizobium is a genus of symbiotic N2-fixing soil bacteria that induce the formation of root nodules of leguminous plants. To evaluate the effect of Bradyrhizobium on biological efficiency and quality characteristics of mushroom an experiment was conducted in 2008 with mother spawn preparation. Other than control (T1) Bradyrhizobium added directly to wheat corn (T2), added to pure mycelium and added by pure mycelium and incubated by Bradyrhizobium slab at same time (T3). Added Bradyrhizobium in wheat incubation stage increased positively Ash, Ca, P, K, and protein, and decreased days to primordial initiation in the mushroom samples. Added Bradyrhizobium in Petri culture stage also had an effect of increasing days to primordial initiation, Ca, Mg and protein, but decreasing biological efficiency, Dry matter, Ash, P and K in the mushroom samples. Added Bradyrhizobium in both Petri culture stage and wheat incubation stage did not have any significant effect on total nitrogen in the mushroom samples.

Keywords : Bradyrhizobium, Oyster mushroom, Biological efficiency, Protein content.