Broad bean rhizobium strain Bga2-2 and application thereof

The invention relates to a broad bean rhizobium strain Bga2-2 and application thereof. The strain is produced from fresh broad bean root nodules through separation and purification and belongs to a Rhizobium anhuiense strain. The strain is preserved in China Center for Type Culture Collection in Wuhan University on October 23, 2017 with a preservation number of CCTCC NO: M2017613. The rhizobium strain Bga2-2 is an excellent broad-spectrum broad bean rhizobium strain, and the broad-spectrum broad bean rhizobium strain has strong symbiotic nitrogen fixation capacity, wide application range withSichuan broad bean varieties, is simultaneously capable of secreting IAA and dissolving inorganic phosphorus and organic phosphorus and has excellent stress resistance; the strain has good matching affinity with broad bean varieties mainly cultivated in Sichuan province, by inoculating the strain Bga2-2 into different varieties of the broad beans in Sichuan province without applying a nitrogen fertilizer, the yields of th