الفهرس | Only 14 pages are availabe for public view |
Abstract This work was carried out in the laboratory and greenhouse of Agric. Microbiology Dept. at the Faculty of Agriculture, Zagazig University, Egypt, in order to isolate and select efficient indigenous strains of Rhizobium leguminosarum bv. vicieae, Azospirillium spp. and Azotobacter spp. which isolated from different locations in Sharkia governorate to use them as bio- fertilizers for broad bean (Vicia faba L.) and wheat (Triticum aestivum L.) plants. Thirty two Rhizobium isolates were selected as effective strains for nodulation on broad bean, 18 isolates of Azospirillum, and 14 isolates of Azotobacter were efficient in nitrogenase activity in liquid cultures. Five isolates showing high values in nitrogen fixation of R. leguminosarum bv. vicieae and the highest five effective isolates of each of Azotobacter spp. and Azospirillum spp. were used for GA3, IAA and IBA production in liquid cultures. The selected bio-fertilizers were examined on the effect on growth and productivity of broad bean and wheat plants which cultivated in both sandy and clay soils under different levels of inorganic and organic N fertilizers in six greenhouse experiments. |