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<p>Parent material shapes soil properties, yet its effects on soil functions and microbial networks remain unclear. Here we investigate these relationships using a large-scale field survey comparing soils derived from calcium-rich carbonate rocks and calcium-poor clastic rocks, complemented by a microcosm experiment. Soils from calcium-rich parent materials contained 33% higher organic carbon, 58% higher total nitrogen, and 55% higher total phosphorus than calcium-poor soils, yet lower labile carbon and several hydrolytic enzyme activities, with similar water retention. Calcium-rich soils exhibited greater bacterial network complexity, which associated with enhanced soil functions. Within calcium-rich soils, rock and soil calcium were primary drivers of increased carbon, nitrogen, and phosphorus storage and bacterial network complexity. The microcosm experiment confirmed that calcium-rich rock addition stimulated soil carbon and nitrogen cycling and enhanced bacterial network complexity, even in calcium-rich soils. These findings indicate calcium-rich parent materials can play a pivotal role in improving soil ecosystem services.</p><p></p>

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Calcium-rich parent materials enhance multiple soil functions and bacterial network complexity

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年10月8日

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  • Peilei Hu,
  • Wei Zhang,
  • Wolfgang Wanek,
  • Ji Chen,
  • Diego Abalos,
  • Jie Zhao,
  • Dan Xiao,
  • Xinyu Hou,
  • Juan Li,
  • Hongsong Chen,
  • Jun Xiao,
  • Xionghui Liao,
  • Tiangang Tang,
  • Hanqing Wu,
  • Kelin Wang

摘要

Parent material shapes soil properties, yet its effects on soil functions and microbial networks remain unclear. Here we investigate these relationships using a large-scale field survey comparing soils derived from calcium-rich carbonate rocks and calcium-poor clastic rocks, complemented by a microcosm experiment. Soils from calcium-rich parent materials contained 33% higher organic carbon, 58% higher total nitrogen, and 55% higher total phosphorus than calcium-poor soils, yet lower labile carbon and several hydrolytic enzyme activities, with similar water retention. Calcium-rich soils exhibited greater bacterial network complexity, which associated with enhanced soil functions. Within calcium-rich soils, rock and soil calcium were primary drivers of increased carbon, nitrogen, and phosphorus storage and bacterial network complexity. The microcosm experiment confirmed that calcium-rich rock addition stimulated soil carbon and nitrogen cycling and enhanced bacterial network complexity, even in calcium-rich soils. These findings indicate calcium-rich parent materials can play a pivotal role in improving soil ecosystem services.