Azza A. M. Abd El-All and Amal W. Abo El-Khair( 2014). Response of Faba Bean to Combined Application of Growth –Promoting Rhizobacteria and CyanobacteriaMiddle East Journal of Agriculture Research, 3(3): 663-669, 2014 ISSN 2077-4605
Abstract: This study shows the effect of some growth –promoting rhizobacteria (Bacillus subtilis and Pseudomonas
fluorescens ) either individually or as a mixture of both inoculum of Nostoc muscorum and Anabaena oryzae on faba been (Vicia faba) yield as well as N, P and K contents. Soil biological activities in terms of dehydrogenase and nitrogenase activities, CO2 evolution, total bacteria as well as cyanobacteria counts were considered as well. The experiment was conducted at El- Ismailia Agric. Res .station, Agric. Res.Center (ARC), El-Ismailia Governorate, Egypt, in the winter season of 2011/2012. The response of faba been to inoculation with the plant growth promoters in presence of Rhizobium inoculation compared to control (100 % N) revealed that the highest significant effect on seed weights was found with Pseudomonas fluorescens. Also, Pseudomonas fluorescens with 75% N increased the number and weight of pods over control and all other treatments. Biofertilization with Bacillus subtilis, Pseudomonas fluorescens and mixture of both together with cyanobacteria showed significant effect on NPK % of bean seeds compared to the control of 100 %N. All parameters of the tested soil biological activity under different treatments of growth promoting rhizobacteria were higher than those of the control. It is recommended to use the growth promoting rhizobacteria (Bacillus subtilis, Pseudomonas fluorescens) individually without N fertilizer and cyanobacteria ( Nostoc muscorum and Anabaena oryzae) in the presence of Rhizobium to save a part of mineral N fertilizer required for bean plant production.
Keywords: (Faba bean, growth promoting rhizobacteria ( Bacillus subtilis, Pseudomonas fluorescens), cyanobacteria ( Nostoc muscorum , Anabaena oryzae) .)
