The use of phytoremediation was an efficient strategy for the restoration of mine slag and the addition of modifier was favorable for improving the phytoremediation efficiency. Herein, spent mushroom compost (SMC) was added in manganese (Mn) slag to reveal the phytoremediation potential of Paulownia fortunei seedlings. The transportation, subcellular distribution and chemical forms of Mn in P. fortunei, the diurnal variation of photosynthesis and antioxidant enzyme activities in P. fortunei leaves were measured to reveal the effect of SMC (mass ratios of 10%, M+) on the phytoremediation of Mn slag. Results showed that the addition of SMC increased the accumulation content of Mn by 408.54% due to the increased biomass of P. fortunei seedlings. After SMC amendment, the maximum net photosynthetic rate (Pn) increased and the superoxide dismutase (SOD) activities decreased significantly (p < 0.05), which was beneficial to the tolerance of leaves to Mn stress. SMC amendment maintained the cell structural integrity of P. fortunei seedlings observed by transmission electron microscope (TEM). Additionally, SMC amendment decreased the damage level of Mn to the cell of P. fortunei seedlings by using function groups (-CH₃ and –COOH) to bond Mn in the cell walls and vacuoles. SMC amendment reduced the Mn toxicity to P. fortunei seedlings and improved the phytoremediation capacity.

植物修复的使用是恢复矿渣的有效策略，添加改性剂有利于提高植物修复的效率。在这里，用过的蘑菇堆肥（SMC）添加到锰（Mn）炉渣中，以揭示泡桐幼苗的植物修复潜力。测定了金钱草中锰的转运，亚细胞分布和化学形态，金钱草叶片光合作用的日变化和抗氧化酶活性，揭示了SMC（质量分数为10％，M +）对植物修复的影响。锰渣。结果表明，SMC的添加增加了锰的积累量，达到了408.54％，这是由于福寿螺的生物量增加所致。幼苗。SMC改良后，最大净光合速率（Pn）增加，超氧化物歧化酶（SOD）活性明显降低（p  <0.05 ），这有利于叶片对Mn胁迫的耐受性。SMC修饰剂通过透射电子显微镜（TEM）观察了福寿螺幼苗的细胞结构完整性。此外，SMC修饰通过使用功能组（-CH ₃和-COOH）将Mn结合在细胞壁和液泡中，从而降低了对P. fortunei幼苗细胞的Mn伤害水平。SMC改良剂减少了对福寿螺幼苗的Mn毒性并提高了植物的修复能力。