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ORIGINAL RESEARCH article
Front. Plant Sci.
Sec. Functional Plant Ecology
Volume 16 - 2025 | doi: 10.3389/fpls.2025.1516775
This article is part of the Research TopicHighlights in Forest Ecology and DynamicsView all 6 articles
E ffects of litter input on soil aggregation and aggregate carbon turnover differ among three subtropical forests in southeastern China
Provisionally accepted- 1Fujian Agriculture and Forestry University, Fuzhou, China
- 2Auckland University of Technology, Auckland, Auckland, New Zealand
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Background and Aims: Litter input plays important roles in controlling soil aggregation and aggregate carbon (C) content. However, the effects of litter input on soil aggregate C turnover in different forest types remain unclear.We examined the changes of aggregate mass proportion, and the litter-derived and native C content among soil aggregates after three years of aboveground and root litter input, using 13 C isotope tracing in a natural forest, a Chinese fir (Cunninghamia lanceolate) plantation, and a masson pine (Pinus massoniana) plantation in southeastern China.Results: Belowground root litter rather than aboveground litter input enhanced soil aggregation. Litter input increased total C content across all aggregates, and the effects were no different between aboveground litter and belowground root litter input except for the >2 mm fraction. Belowground root litter input led to less native C content across three forest types. However, belowground root litter input resulted in more formation of litter-derived C than aboveground litter input under masson pine plantations, but not for both natural forest and Chinese fire plantation, suggesting a different effect of litter input on the litter-derived C formation among forest types. In addition, forest type affected soil aggregation and aggregate C turnover, and the differences in litter quantity and litter C:N ratio can explain the changes in soil aggregation and aggregate C turnover among forest types.Our results imply that belowground root litter input plays a more important role in controlling soil aggregation and aggregate C turnover than aboveground litter, and the impact on newly litter-derived C formation depends on forest type.
Keywords: Aboveground litter, root litter, subtropical forest, Soil aggregation, Litter-derived carbon, Soil native carbon
Received: 24 Oct 2024; Accepted: 21 Apr 2025.
Copyright: © 2025 Hu, Zheng, Qin and Leuzinger. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Ya-lin Hu, Fujian Agriculture and Forestry University, Fuzhou, China
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