1. 国家自然科学基金委员会指南引导类原创探索计划项目：喀斯特关键带氮的跨圈层过程与多尺度研究及预测（主申请）（2026.01-2028.12；批准号：42550177），主持

2. 国家自然科学基金委员会面上项目：大气沉降与森林冠层铵氮交换的稳定同位素研究（2025.01-2028.12；批准号：42473081），主持

3. 国家自然科学青年基金：植物铵根和硝酸根的稳定同位素研究：以西南外来植物入侵系统为例（2022.01-2024.12；批准号：42103075），主持

4. 贵州省科技创新平台科研项目：喀斯特系统关键生源要素耦联与碳汇提升研究（2026.01-2028.12；批准号：黔科合平台CXPTXM〔2025〕007），课题负责

5. 贵州省2025年度百千万领军人才团队项目：贵州省氮循环与生态环境科技创新人才团队建设（黔科合人才BQW（2025）007），骨干

6. 国家自然科学基金委员会重点项目：京津冀地区森林系统有机氮的生物地球化学循环（2024.01-2028.12；批准号：42330505），参与

7. 国家自然科学基金委员会重点项目：森林植物氮利用关键过程及其对大气氮输入的响应（2018.01-2022.12；批准号：41730855），参与

8. 国家自然科学基金委员会面上项目：贵州湖泊沉积物中硫与重金属和营养盐耦合循环的微生物地球化学过程及其水质影响（2016.01-2019.12；批准号：41573081)，参与

9. 国家自然科学基金委员会面上项目：应用生物标识物碳氮同位素示踪深层土壤有机碳的激发效应研究（2016.01-2019.12；批准号：41573012)，参与

10. 国家自然科学青年基金：森林穿冠水硝酸根氮氧同位素变化机理研究（2018.01-2020.12；批准号：41703005），参与

11. 国家重点研发计划‘大气污染成因与控制技术研究’专项项目：区域氮、硫沉降时空分布与来源特征（2017.07-2020.12；批准号：2017YFC0210101），参与

12. 国家重点研发计划-全球变化及应对专项课题：生态系统碳氮耦合循环生物学机制（2016.09-2021.09；批准号：2016YFA0600802），参与

13. 生态环境部南京环境科学研究所委托课题：武夷山区域（浙江省部分）植物多样性现状与评估（2020.05-2021.05；编号：20-01-06），参与

14. 生态环境部南京环境科学研究所委托课题：景洪、勐海、勐腊3县市生物多样性现状评估（2019.05-2020.05；编号：8-2-3-4-2），参与

15. 天津大学“乡村振兴”项目：宕昌国家级森林保护地的生态质量维持机制（2022.03-2023.03; 开花类），参与

1. Hu CC, Tian CG, Chen CJ, Song W, Yue X, Liu XY*. (2025) Increased carbon cost for nitrogen assimilation in plants under a warming climate. Nature Geoscience, 18, 1133-1137, doi: 10.1038/s41561-025-01816-y

2. Hu CC, Liu XY*, Driscoll AW, Kuang YW, Brookshire ENJ, Lü XT, Chen CJ, Song W, Mao R, Liu CQ, Houlton BZ. (2024) Global distribution and drivers of relative contributions among soil nitrogen sources to terrestrial plants. Nature Communications, 15, 6407, doi: 10.1038/s41467-024-50674-6

3. Hu CC, Liu XY*. (2022) Plant nitrogen-use strategies and their responses to the urban elevation of atmospheric nitrogen deposition in southwestern China. Environmental Pollution, 311, 119969, doi: 10.1016/j.envpol.2022.119969

4. Hu CC, Liu XY*, Yan YX, Lei YB, Tan YH, Liu CQ. (2022) A new isotope framework to decipher leaf-root nitrogen allocation and assimilation among plants in a tropical invaded ecosystem. Science of the Total Environment, 806, 151203, doi: 10.1016/j.scitotenv.2021.151203

5. Hu CC, Lei YB, Tan YH, Sun XC, Xu H, Liu CQ, Liu XY*. (2019) Plant nitrogen and phosphorus utilization under invasive pressure in a montane ecosystem of tropical China. Journal of Ecology, 107, 372–386, doi: 10.1111/1365-2745.13008

6. Yan YX, Hu CC, Lei YB, Tan YH, Liu XY*. (2025) Carbon Isotope Constraints on Plant Water Use Efficiency in a Tropical Invaded Ecosystem. Journal of Geophysical Research-Biogeosciences, 130, e2025JG008997, doi: 10.1029/2025JG008997

7. Sun ZC, Xu SQ, Guo HR, Hu CC, Song W, Liu XY*. (2025) Atmospheric N deposition as a key driver of soil nitrate production and accumulation in temperate forests under semi‐arid climate. Geophysical Research Letters, 52, e2025GL117029.

8. Chen CJ, Liu XY*, Hu CC, Xu SQ, Xu SQ, Wang XW, Mao R, Koba K. (2025) Inorganic nitrogen nutrition in boreal plants is underestimated and insensitive to environmental changes. Earch’s Future, 13, e2024EF005723

9. Chen ZL, Song W, Hu CC, Liu XJ, Chen GY, Walters, WW, Michalski G, Liu CQ, Fowler D, Liu XY*. (2022) Significant contribution of combustion-related sources to ammonia emissions. Nature Communications, 13, 7710. doi: 10.1038/s41467-022-35381-4

10. Guo HR, Wu Y, Hu CC, Liu XY. (2022) Elevated nitrate preference over ammonium in aquatic plants by nitrogen loadings in a city river. Journal of Geophysical Research – Biogeosciences, 125 (5), e2021JG006614, doi: 10.1029/2021JG006614

11. Sun ZC, Ma TY, Xu SQ, Guo HR, Hu CC, Chen CJ, Song W, Liu XY*. (2022) Levels and variations of soil bioavailable nitrogen among forests under high atmospheric nitrogen deposition. Science of the Total Environment, 838, 156405, doi: 10.1016/j.scitotenv.2022.156405

12. Xu SQ, Liu XY*, Sun ZC, Hu CC, Wanek W, Koba K. (2021) Isotopic elucidation of microbial nitrogen transformations in forest soils. Global Biogeochemical Cycles, 35 (12) e2021GB007070, doi. 10.1029/2021GB007070

13. Chen CJ, Liu XY*, Wang XW, Hu CC, Xu SQ, Mao R, Bu ZJ, Fang YT, Koba K. (2021) Different leaf carbon, nitrogen, and phosphorus stoichiometry and carbon and nitrogen isotopes among peatland plants in northeastern China. Plant and Soil, 467, 345–357, doi: 10.1007/s11104-021-05085-7

14. Ma TY, Liu XY*, Xu SQ, Guo HR, Huang H, Hu CC, Wu D, Sun ZC, Chen CJ, Song W. (2020) Levels and variations of soil organic carbon and total nitrogen among forests in a hotspot region of high nitrogen deposition. Science of the Total Environment, 713, 136620, doi.org/10.1016/j.scitotenv.2020.136620

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16. Sun ZC, Hu CC, Wu D, Chen GP, Lu XQ*, Liu XY*. (2021) Estimation of evaporation losses based on stable isotopes of stream water in a mountain watershed. Acta Geochim, 40, 176–183, doi: 10.1007/s11631-021-00452-8

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