Impact of climate and lithology on soil phytolith-occluded carbon accumulation in eastern China
Impact of climate and lithology on soil phytolith-occluded carbon accumulation in eastern China
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DOI：
10.1007/s11368-016-1527-x
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发表时间：
2017-02
影响因子：
3.6
通讯作者：
Xiaodong Zhang;Zhaoliang Song;Zhiqi Zhao;L. van Zwieten;Jian-Wu Li;Linan Liu;Song Xu;Hailong Wang-Hailon
中科院分区：
文献类型：
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作者：
Xiaodong Zhang;Zhaoliang Song;Zhiqi Zhao;L. van Zwieten;Jian-Wu Li;Linan Liu;Song Xu;Hailong Wang-Hailon
目的碳（C）在植硅体中的包埋，生物硅沉积在植物组织中并返回土壤，是陆地生态地球化学碳长期固存的重要机制，可能在减缓气候变化方面发挥重要作用。采用质量平衡法对花岗岩和玄武岩上发育的土壤（至100厘米深度）进行取样，以探讨气候和岩性对土壤植硅包埋碳（PhytOC）的影响结果和讨论土壤PhytOC存储在亚热带是显着大于在热带，与花岗岩上开发的土壤剖面存储更多的PhytOC比玄武岩上的土壤。植硅体和PhytOC含量随深度的增加而降低。植硅体含量与玄武岩上发育的土壤剖面中的土壤生物有效硅呈显著正相关，而与花岗岩上发育的土壤剖面中的生物有效硅呈显著负相关。森林管理（例如，造林和再造林）和外部硅添加物（例如，玄武岩粉末添加剂）在土壤中的作用，特别是在花岗岩上生长的土壤中，有可能增加植物有机碳在森林生态系统中的积累。
PurposeOcclusion of carbon (C) within phytoliths, biogenic silica deposited in plant tissues and returned to the soil, is an important mechanism for long-term terrestrial biogeochemical C sequestration and might play a significant role in mitigating climate change.Materials and methodsSubtropical and tropical soil profiles (to 100 cm depth) developed on granite and basalt were sampled using a mass-balance approach to explore the influence of climate and lithology on soil phytolith-occluded carbon (PhytOC) accumulation.Results and discussionSoil PhytOC storage in the subtropics was significantly greater than in the tropics, with the soil profiles developed on granite storing greater PhytOC than soils derived on basalt. Phytolith and PhytOC content decreased with depth in all soil profiles. Phytolith content showed a positive correlation with the soil bio-available silicon in the soil profiles developed on basalt, while a negative correlation was observed in soil profiles developed on granite.ConclusionsClimate and lithology have a significant impact on soil PhytOC sequestration. The management of forests (e.g., afforestation and reforestation) and external silicon amendments (e.g., basalt powder amendment) in soils, especially those developed on granite, have the potential to enhance PhytOC accumulation in forest ecosystems.