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Background <p>Managing soil organic carbon (SOC) in Moso bamboo (<i>Phyllostachys edulis</i>) forests presents a potential opportunity to mitigate climate change. Mixed Moso bamboo forestation can alleviate the decline in SOC observed in pure Moso bamboo forests (PBF). However, a systematic evaluation of SOC accumulation in mixed Moso bamboo forests (MBF) compared with PBF remains lacking.</p> Methods <p>We conducted a meta-analysis of 111 peer-reviewed studies to quantify the response of SOC content to MBF implementation and identify the primary controls of this response.</p> Results <p>Overall, SOC content was 8% higher in MBF than in PBF (<i>p</i> &lt; 0.05), driven by increased aboveground bamboo biomass as well as improved soil microbial biomass and physicochemical properties, such as total porosity and available nitrogen content. Variations in SOC associated with MBF practice were largely explained by climatic and geographical factors. Specifically, the mean annual precipitation (MAP), elevation, and bamboo-to-tree ratio (mixing ratio) were identified as the primary controls of SOC variation. The positive effects of MBF on SOC were strongest at an&#xa0;MAP of 1600–2000 mm and at&#xa0;a mixing ratio of 45%–65% but weakened with the increasing elevation. Greater enhancement of SOC due to MBF practice was observed in topsoils (0–20 cm) of Luvisols in regions with a typical subtropical monsoon climate and multiple broadleaf species introduced as the mixed species of MBF.</p> Conclusions <p>The results suggest that the implementation of MBF could boost SOC accumulation, further highlighting the importance of MAP, elevation, and mixing ratio in optimizing site-specific MBF practices to enhance the sustainability of bamboo forest ecosystems.</p> Graphical Abstract <p></p>

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Precipitation, elevation, and bamboo-to-tree ratio regulate soil organic carbon accumulation in mixed Moso bamboo forests

  • 期刊论文

  • 发表日期：

    2025年5月27日

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  • Xiaotong Liu,
  • Yi Xu,
  • Asif Ameen,
  • Nayab Gull,
  • Shaohui Fan,
  • Guanglu Liu

摘要

Background

Managing soil organic carbon (SOC) in Moso bamboo (Phyllostachys edulis) forests presents a potential opportunity to mitigate climate change. Mixed Moso bamboo forestation can alleviate the decline in SOC observed in pure Moso bamboo forests (PBF). However, a systematic evaluation of SOC accumulation in mixed Moso bamboo forests (MBF) compared with PBF remains lacking.

Methods

We conducted a meta-analysis of 111 peer-reviewed studies to quantify the response of SOC content to MBF implementation and identify the primary controls of this response.

Results

Overall, SOC content was 8% higher in MBF than in PBF (p < 0.05), driven by increased aboveground bamboo biomass as well as improved soil microbial biomass and physicochemical properties, such as total porosity and available nitrogen content. Variations in SOC associated with MBF practice were largely explained by climatic and geographical factors. Specifically, the mean annual precipitation (MAP), elevation, and bamboo-to-tree ratio (mixing ratio) were identified as the primary controls of SOC variation. The positive effects of MBF on SOC were strongest at an MAP of 1600–2000 mm and at a mixing ratio of 45%–65% but weakened with the increasing elevation. Greater enhancement of SOC due to MBF practice was observed in topsoils (0–20 cm) of Luvisols in regions with a typical subtropical monsoon climate and multiple broadleaf species introduced as the mixed species of MBF.

Conclusions

The results suggest that the implementation of MBF could boost SOC accumulation, further highlighting the importance of MAP, elevation, and mixing ratio in optimizing site-specific MBF practices to enhance the sustainability of bamboo forest ecosystems.

Graphical Abstract