Leguminous crops as a nature-based strategy (NbS) to restore the functionality of reclaimed soils in coal mine agroecosystem——datas

esults showed that the GLY treatment did not significantly alter soil field water capacity compared to the control. However, soil bulk density and the proportions of solid- and liquid-phases were significantly reduced, while the gas-phase proportion increased significantly (p < 0.05). Prolonged leguminous forage cultivation significantly decreased the soil three-phase structure distance (p < 0.05). Soil organic matter, total nitrogen, and inorganic nitrogen content decreased significantly, whereas total phosphorus, easily oxidized organic carbon, available phosphorus, and available potassium content increased significantly (p < 0.05). Key bacterial phyla included Proteobacteria (20.5-27.7%), Acidobacteriota (16.5-25.0%), and Actinobacteriota (18.8-21.6%), while dominant fungal phyla were Ascomycota (32.5-55.2%), Mortierellomycota (3.7-53.5%), and Basidiomycota (3.5-11.5%). The alpha diversity of both bacteria and fungi in the GLY treatment was significantly lower than in the control, with notable differences in β diversity (p < 0.05).实验结果表明，与对照组相比，GLY处理并未显著改变土壤田间持水量。然而，土壤容重及固、液相占比均显著降低，气相占比则显著升高（p < 0.05）。长期种植豆科牧草可显著降低土壤三相结构距离（p < 0.05）。土壤有机质、全氮及无机氮含量显著下降，而全磷、易氧化有机碳、有效磷与速效钾含量则显著升高（p < 0.05）。关键细菌门类包括变形菌门（Proteobacteria，20.5%~27.7%）、酸杆菌门（Acidobacteriota，16.5%~25.0%）与放线菌门（Actinobacteriota，18.8%~21.6%）；优势真菌门类则为子囊菌门（Ascomycota，32.5%~55.2%）、被孢霉门（Mortierellomycota，3.7%~53.5%）与担子菌门（Basidiomycota，3.5%~11.5%）。GLY处理下细菌与真菌的α多样性（alpha diversity）均显著低于对照组，且二者的β多样性（beta diversity）亦存在显著差异（p < 0.05）。