Long-term regulation of maize crop residue carbon accumulation in soil and aggregates by epigeic and endogeic earthworms is tillage regime-specific

作者：Xinyu Zhu, Yunchuan Hu, Zhen He, Donghui Wu, Andrey S. Zaitsev · 发表于：Geoderma · 年份：2025 · DOI：10.1016/j.geoderma.2025.117231 · 被引用次数：7 · 研究领域：Soil Carbon and Nitrogen Dynamics、Peatlands and Wetlands Ecology、Bioenergy crop production and management

• Endogeic earthworms promote the retention of residue-C in soil more than epigeic. • In no-tillage soil, earthworms accumulate larger amounts of residue-C in soil and aggregates. • The combination of the two earthworm species promotes higher residue-C in aggregate in no-tillage soil. • Earthworms are far more efficient in increasing SOC content in no-tillage systems than in the conventional ones. Earthworms influence soil carbon (C) sequestration by modulating the balance between plant residue C incorporation and soil C mineralization below ground. The knowledge of the prolonged effects and backstaging mechanisms of C sequestration by earthworms belonging to different ecological groups in no-tillage (NT) and conventional tillage (CT) agroecosystems is still surprisingly sketchy. Therefore, we analyzed the contribution of the epigeic species Eisenia nordenskioldi (Eisen) and the endogeic species Metaphire tschiliensis (Michaelsen) to the distribution of C in soil and soil aggregates of different sizes from the 13 C-labeled maize residue. For this, we ran a 337-day-long mesocosm experiment with simulated NT and CT systems. At the end of the experiment, epigeic and endogeic earthworm treatments in NT soil significantly increased SOC concentration by 16.61% and 17.31%, respectively if compared with the situation on day 40. However, no significant effects were observed in CT soil. In NT soil, the presence of M. tschiliensis significantly increased residue-derived C in SOC, wherea...