Soda saline-alkali soil improver containing microorganisms and improvement method

The invention provides a soda saline-alkali soil improver containing microorganisms and an improvement method in order to solve the problems existing in an existing saline-alkali soil biological improvement method. The soda saline-alkali soil improver is composed of azospirillum brazilii, iron tailings and an organic fertilizer, the ratio of the azospirillum brazilii to the iron tailings to the organic fertilizer is 1800-2000 ml: 4000-4500 g: 1200-1500 g, and the concentration of azospirillum brazilii liquid is 1-9 * 10 < 7 > CFU/ml. Through compound application of azospirillum brasilense andthe iron tailings, the soil salinity can be further reduced, the pH value of the soil is balanced, crop growth is promoted, and long-acting improvement of the saline-alkali soil is achieved. 本发明的目的是为了解决现有盐碱地生物改良方法存在的问题，提供了一种含有微生物的苏打盐碱地改良剂及改良方法。该苏打盐碱地改良剂，由巴西固氮螺菌、铁尾矿和有机肥组成，三个组分的比例为1800ml~2000ml：4000g~4500g：1200~1500g，巴西固氮螺菌菌液的浓度为1~9×10CFU/ml。通过巴西固氮螺菌与铁尾矿的复合施用，能够进一步降低土壤盐分，平衡土壤的酸碱度，促进作物生长，实现盐碱地的长效改良。