Abstract Nitrogen (N) fertilization and reversing land management from long-term no tillage (NT) to conventional tillage (tillage reversal; TR) may markedly alter soil carbon (C) dynamics. We studied the impact of N fertilization, N applied at 100 kg ha−1 yr−1 (N100) vs. no N application (N0), and tillage reversal (NT vs. TR) on soil aggregation and aggregate-associated C in top- (0–10) and subsoils (50–60 cm) in a Black Chernozem and a Gray Luvisol. Our results showed that soil organic C content was greater in N100 (1.74 g C kg−1) than in N0 (1.29 g C kg−1), and in TR (1.71 g C kg−1) than in NT (1.32 g C kg−1) only in the topsoil of the Gray Luvisol. Nitrogen fertilization and tillage reversal improved topsoil, but not subsoil mean weight diameter or the amount of large macroaggregates (>2000 μm). Topsoil aggregate-associated C was only increased (P

中文翻译：

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耕作逆转并没有逆转施氮肥在黑色黑钙土和灰色 Luvisol 中增强的 C 储存

摘要 施氮 (N) 和将土地管理从长期免耕 (NT) 逆转为常规耕作 (tillage reversal; TR) 可能会显着改变土壤碳 (C) 动态。我们研究了施氮、施氮 100 kg ha-1 yr-1 (N100) 与不施氮 (N0) 以及反转耕作（NT 与 TR）对土壤聚集和顶部聚集体相关碳的影响- (0–10) 和底土 (50–60 cm) 在黑色黑钙土和灰色 Luvisol 中。我们的结果表明，N100 (1.74 g C kg-1) 中土壤有机碳含量高于 N0 (1.29 g C kg-1)，TR (1.71 g C kg-1) 高于 NT (1.32 g C kg-1) kg−1) 仅在 Grey Luvisol 的表土中。施氮和翻耕改善了表层土，但不改善底土平均重量直径或大团聚体 (>2000 μm) 的数量。