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. 2018 Aug 28;8:12934. doi: 10.1038/s41598-018-30666-5

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Changes in litter mass loss and nutrient concentrations (% of initial mass) over time for litter decomposition in AC (A,C,E) and LF (B,D,F) plantations under different N treatments: N0 (control), N1 (30 kg N ha⁻¹ yr⁻¹), and N2 (60 kg N ha⁻¹ yr⁻¹). Values are means ± SE. ^*Indicates significance differences between the control and the N addition treatments at P < 0.05. AC: Alnus cremastogyne, LF: Liquidambar formosana.