数字农科院2.0

Reply to Ju et al.: Mechanisms of deeper soil organic carbon loss

文献类型： 外文期刊

作者： Zhenghu Zhoua;Minggang Xu;Andong Cai

作者机构：

关键词： Soil organic carbon

期刊名称： Proceedings of the National Academy of Sciences of the United States of America

ISSN： 1091-6490

年卷期： 2025 年 122 卷 27 期

页码：

收录情况： SCIE（2025版）

摘要： In the accompanying comment, supports the deeper soil organic carbon (SOC) loss from our continental-scale soil resampling study. Importantly, we greatly appreciate their novel mechanisms explaining the loss of deeper SOC based on a long-term field fertilization experiment. In specific, O2 is in short supply in deeper soils, instead, nitrate serves as an electron acceptor for deeper soil microbial respiration under anoxic conditions. Therefore, it is expected that fertilization-induced nitrate accumulation in deeper soil would trigger the decomposition rate and result in the loss of SOC. Additionally, this process may be further amplified by climate warming through increased nitrate mobility via intensified hydrological leaching. Besides the nitrate accumulation-induced decomposition proposed by Ju et al. and the four potential mechanisms proposed by our original study, here,combining literature synthesis, we provide another two potential mechanisms.

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