Rapid positive response of young trees growth to warming reverses nitrogen loss from subtropical soil

Global warming is widely expected to alter nitrogen (N) cycling in terrestrial ecosystems by accelerating N transformations in soils. However, it is unclear how warming will affect plant–soil N cycling in subtropical ecosystems.
Here, we measured the N transformations including net ammoniation, nitrification, nitrous oxide emissions, and nitrate in soil solution throughout the plant–soil continuum with two years of experimental soil warming (+5 °C) in a young subtropical Chinese fir mesocosm. Seasonal variations of soil and plant (foliage and root) N concentrations and isotopes (δ15N), foliar water use efficiency, and arbuscular mycorrhizal colonization rate were measured.
Soil warming significantly increased net ammoniation and nitrification of the soil, together with the transient positive response observed in inorganic N of the soil. Warming increased nitrate N fluxes in soil solution and nitrous oxide emissions in the first year but not in the second year, suggesting N losses throu..., , , * File name：README_Dataset
* Title of Dataset: Data from: Rapid positive response of young trees growth to warming reverses nitrogen loss from subtropical forest soils
* Dataset DOI: 10.5061/dryad.g79cnp5xd
* Authors: Maokui Lyu
* Email: <[e-mail]>
* Address: num. 32 in Qishan Road, Fujian Normal University, Minhou country, Fuzhou, 350007.
* Other contributors: Shidong Chen, Qiufang Zhang, Zhijie Yang, Jinsheng Xie*, Chao Wang, Xiaohong Wang, Xiaofei Liu, Decheng Xiong, Chao Xu, Weisheng Lin, Guangshui Chen, Yuehmin Chen*, Yusheng Yang
* Organization: Fujian Sanming Forest Ecosystem National Observation and Research Station, School of Geographical Sciences, Fujian Normal University.
* Date created: 2024-01-28

*Contributor ORCID IDs

* Maokui Lyu:

* Acknowledgements
* Funding sources: The research was funded by the National Natural Science Foundation of China (No. 31930071, 32192433, and 32001169)

Methodological Information

* Methods of da...

普遍认为，全球变暖可通过加速土壤氮（Nitrogen, N）转化过程，改变陆地生态系统的氮循环。然而，目前尚不清楚气候变暖将如何影响亚热带生态系统中的植物-土壤氮循环。
本研究依托亚热带幼年杉木中宇宙（mesocosm）开展了为期两年的土壤增温（+5℃）实验，对植物-土壤连续体中的氮素转化过程进行了测定，包括土壤溶液中的净氨化作用、硝化作用、氧化亚氮排放以及硝酸盐含量。同时测定了土壤与植物（叶片和根系）的氮浓度、同位素（δ¹⁵N）、叶片水分利用效率以及丛枝菌根侵染率的季节动态变化。
土壤增温显著提升了土壤净氨化与硝化作用速率，同时使土壤无机氮含量出现短暂的正向响应。增温在实验第一年提升了土壤溶液中硝态氮通量与氧化亚氮排放，但该效应在第二年并未显现，表明氮素流失通过……
* 文件名：README_Dataset
* 数据集标题：源自《幼树生长对增温的快速正向响应逆转亚热带森林土壤氮素流失》的研究数据
* 数据集DOI：10.5061/dryad.g79cnp5xd
* 作者：吕茂奎
* 电子邮箱：<[e-mail]>
* 通讯地址：福建省福州市闽侯县旗山路32号，福建师范大学，350007
* 其他贡献者：陈仕东、张秋芳、杨志杰、谢锦升*、王超、王小红、刘晓飞、熊德成、徐超、林伟生、陈光水、陈岳民*、杨玉盛
* 所属机构：福建三明森林生态系统国家野外科学观测研究站、福建师范大学地理科学学院
* 创建日期：2024-01-28
* 贡献者ORCID标识符
* 致谢
* 资助来源：本研究受到国家自然科学基金（编号31930071、32192433、32001169）资助
方法学信息
* 实验方法……