Ecological resoration method for soda-type saline-alkali soil

The method comprises: mixing microbial residue with sandy soil for fermentation to obtain a fermented composite; applying the composite to the saline-alkali soil through rotary tillage and field moistening; draining the soil, then adding a soil acid-modifying agent (a 2-4% citric acid solution) at a rate of 50-150 kg/hm²; planting herbaceous species such as ryegrass or reed rhizomes; and watering every two days post-planting.

The method achieves the reuse of agricultural waste, offers low-cost soil remediation, demonstrates excellent efficacy for soda-type saline-alkali soil improvement, and facilitates rapid restoration of grassland vegetation.