Bamboo charcoal application altered the mineralization process of soil organic carbon in different succession stages of karst forest land

文献类型： 外文期刊

第一作者： Hu, Lening

作者： Hu, Lening;Liu, Xuehui;Xie, Yaqi;Zeng, Yicheng;Hu, Lening;Liu, Xuehui;Xie, Yaqi;Zeng, Yicheng;Ou, Huiping;Yu, Yuefeng;He, Tieguang

作者机构：

关键词： karst; soil organic carbon; forest land; bamboo charcoal; enzyme activity

期刊名称：FRONTIERS IN ENVIRONMENTAL SCIENCE （ 影响因子：3.3； 五年影响因子：3.7 ）

ISSN：

年卷期： 2024 年 12 卷

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收录情况： SCI

摘要： Introduction: As a soil amendment, Bamboo charcoal helps to contributes to the improvement of soil carbon sequestration, but its effect on the accumulation and transformation of different soil organic carbon in soil of karst forests is not clear. Methods: The research focused on three distinct forest land succession stages: virgin forest, secondary forest, and planted forest. A 60-day indoor constant temperature culture experiment was conducted, applying bamboo charcoal to the soil of the three forest lands at four different addition ratios: 0%, 1.0%, 2.0%, and 4.0%. The analysis aimed to study the characteristics of SOC mineralization, different carbon fractions of organic carbon, and soil enzyme activity. Results: The findings revealed that bamboo charcoal application led to an increase in the organic carbon (SOC) content within the three forest soils. Moreover, the organic carbon content showed an increase corresponding to the increased proportion of bamboo charcoal, with the highest SOC content observed in the planted forest land with 4.0% bamboo charcoal. The overall performance of the C-0/SOC value in the three forest soils was ranked as follows: planted forest < secondary forest < virgin forest (C-0: the mineralization potential of soil organic carbon). In both planted and secondary forest soils, the C-0/SOC value increased after the application of bamboo charcoal. However, in the virgin forest soil, the application of 1.0% and 4.0% bamboo charcoal reduced the C-0/SOC value, while the application of 2.0% bamboo charcoal increased the C-0/SOC value. Particularly the C-0/SOC value of the planted forest soil without bamboo charcoal was the smallest at 0.047, whereas that in the virgin forest soil with 2.0% bamboo charcoal had the largest value at 0.161. Discussion: Herein, appropriate human intervention can enhance the carbon sequestration potential of forest soil, in different succession stages within the karst area. However, the external application of bamboo charcoal does not significantly improve the carbon sequestration potential in the planted and secondary forest. Notably, applying a higher proportion (4.0%) of bamboo charcoal can enhance the organic carbon sequestration potential, particularly in the virgin forest soil, representing the climax community of forest succession.

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