Field test screening method for microbial strains capable of improving saline-alkaline tolerance of rice

The invention relates to the technical field of rice planting, in particular to a field test screening method for microbial strains capable of improving saline-alkaline tolerance of rice. The field test screening method comprises the following steps of S1, selecting one area with soil with normal saline-alkaline degree and one area with saline-alkali soil at different regions to serve as test fields for rice planting, wherein the areas are ensured to be convenient in transport, flat in terrain, uniform in geology, matched in ditch and way and good in irrigation and drainage; S2, uniformly dividing each test field into a plurality of regions, and uniformly dividing each region into five control groups according to different varieties of rice saline-alkali-resistant microbial agents adoptedin all regions; and S3, performing unified management on each test field, recording the seedling conditions of the rice of each control group in each time period, separately harvesting the rice afterthe rice is mature, and se