Effects of Different Organic Amendments on Soil Improvement, Bacterial Composition, and Functional Diversity in Saline–Sodic Soil

The agricultural productivity of farmland in Northeast China’s Liaohe Plain is restricted by the salinity and sodicity soils, which have additionally low organic matter content. In order to improve saline–sodic amendments are frequently applied. Our objective was clarify how different affect diversity composition soil microbes, as well these factors related crop yield. 2020–2021, we conducted an experiment with amendments. treatments included application residue incorporation (SR), lignite humic acid (LHA; 6 ton/ha), or cow manure (FM; 30 a control (CK). results show that, compared CK, content SOM treated increased 5.3–7.4 g/kg; available potassium (AK) LHA treatment significantly higher than that FM SR 32.17 42.79 mg/kg, respectively; phosphorus (AP) 7.19 mg/kg. pH EC1:5 values were lower those CK 1.36 units 0.2 mS/cm, respectively. changes environmental conditions also affected community structure microbial richness diversity. abundance Acidobacteria. Further FAPROTAX (Functional Annotation Prokaryotic Taxa) analysis showed can increase microbes involved carbon nitrogen cycle processes, such aerobic_ammonia_oxidation, aerobic_chemoheterotrophy, nitrification, etc., increases kernel number per row reduce mineralization, while increasing nutrients This study provides comprehensive understanding cultivated land.