数字农科院2.0

Climate warming and agronomic practice interactively alter soil carbon stock in dry farmland in China

文献类型： 外文期刊

作者： Jie Zhou;Guodong Shao;Enke Liu;Qin Liu;Changrong Yan;Sulaiman Almwarai Alharbi;Ekaterina Filimonenko;Xurong Mei;Yakov Kuzyakov

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关键词： soil organic carbon

期刊名称： Communications Earth and Environment

ISSN： 2662-4435

年卷期： 2025 年 6 卷 1 期

页码：

收录情况： SCIE（2025版）

摘要： Understanding drivers of soil organic carbon (SOC) dynamics and stocks is critical for carbon (C) neutrality in Earth’s extensive dryland croplands. Here, we analyzed 721 soil samples across northern China and revealed divergent regional dynamics of SOC stocks in topsoil (0–20 cm) over three decades. Agricultural intensification in northern China, marked by tripled productivity via strategic N-fertilization and policy-driven increases in straw return, created a major C sink (+3.1 Mg C ha−1), offsetting ~1.5% of China’s average annual emissions. Conversely, Northeast China experienced SOC depletion (−3.9 Mg C ha−1; ~12% loss since 1980s) driven by warming-enhanced decomposition of organic matter. Encouragingly, an annual straw return in excess of 270 kg C ha−1 could offset SOC losses in the face of future warming. Therefore, it is imperative to implement effective soil management practices and adaptation strategies to bolster soil resilience and health, as continued climate warming may undermine soil carbon sequestration. (Figure presented.).

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