The responses of soil aggregation and aggregate-associated phosphorus (P) fractions under natural restoration to climate warming remain unclear. Here, we conducted an eight-year mesocosm experiment wherein farmland soil from a colder site was transplanted to a warmer site to simulate climate warming and established continuous soybean cultivation and natural restoration treatments at each site. We investigated soil aggregate stability and the associated P fractions and soil properties under two land-use systems in a warming climate. Our results revealed that natural restoration significantly increased macroaggregates and macroaggregate-associated NaHCO₃-Pi, NaOH-Po, and TP, but warming impeded the increases of these P fractions without changing soil aggregation. Although TP within microaggregates and the silt and clay fractions remained consistent across treatments, warming resulted in higher NaHCO₃-Pi concentrations in both fractions and lower NaHCO₃-Po and NaOH-Po within microaggregates in restored land. Bacterial community and alkaline phosphatase activity may be responsible for organic P mineralization within microaggregates. The enrichment of NaHCO₃-Pi in smaller-sized aggregates and non-aggregate particles with warming likely increased the risk for P loss. Fungal and bacterial phospholipid fatty acid explained the most variation in the P fractions within macroaggregates and microaggregates, respectively, suggesting that biological processes are involved in determining P distribution. Our study indicates that the distribution of P fractions in differently sized aggregates during natural restoration can be significantly influenced by warming and highlights that incorporating the responses of soil microorganisms and enzymes will improve our understanding of the P cycling in a warming climate.

自然恢复下土壤聚集体和聚集体相关磷（P）部分对气候变暖的响应仍不清楚。在这里，我们进行了一项为期八年的中宇宙实验，将较冷地点的农田土壤移植到较温暖的地点，以模拟气候变暖，并在每个地点建立连续的大豆种植和自然恢复处理。我们研究了气候变暖下两种土地利用系统下的土壤团聚体稳定性以及相关的 P 组分和土壤特性。我们的结果表明，自然修复显着增加了大聚集体和大聚集体相关的 NaHCO ₃-Pi、NaOH-Po 和 TP，但变暖阻碍了这些 P 组分的增加，而没有改变土壤聚集。尽管微团聚体中的 TP 以及淤泥和粘土部分在不同处理中保持一致，但变暖导致两种部分中的 NaHCO ₃ -Pi 浓度较高，而恢复土地的微团聚体中的 NaHCO ₃ -Po 和 NaOH-Po 浓度较低。细菌群落和碱性磷酸酶活性可能是微团聚体中有机磷矿化的原因。_{NaHCO 3}的富集-随着变暖，较小尺寸聚集体和非聚集体颗粒中的 Pi 可能会增加 P 损失的风险。真菌和细菌磷脂脂肪酸分别解释了大聚集体和微聚集体中 P 分数的最大变化，表明生物过程参与确定 P 分布。我们的研究表明，自然恢复过程中不同大小聚集体中 P 组分的分布会受到变暖的显着影响，并强调结合土壤微生物和酶的反应将提高我们对气候变暖中 P 循环的理解。