Quantifying soil gaseous nitrogen losses from nitrification and denitrification based on nitrogen isotope model

Gaseous nitrogen (N) losses from nitrification and denitrification (NO+N2O+N2) pathways contribute a significant fraction of the total N losses from cropland ecosystems. However, a large uncertainty exists in estimating the NO+N2O+N2 losses, hindering effective management of the global N budget. Here we proposed a novel isotope model, which considers N fertilizer, ammonia (NH3) volatilization and crop harvest after testing the steady state assumption of soil δ15N and N pool for croplands, and justified if it could be successfully applied to constrain NO+N2O+N2 losses from cropland ecosystems. We compiled the first bulk-soil δ15N dataset of 0-30cm soils (n=738) from croplands and produced a global map of cropland soil δ15N, which is crucial input data for N isotope model to quantify NO+N2O+N2 losses. The results show that the cropland soil δ15N ranges from 3.5 to 9.0‰, with a mean value of 6.6±0.8‰ (mean ± standard deviation). The estimated NO+N2O+N2 losses accounted for an average of 17..., , , # Data from: Quantifying soil gaseous nitrogen losses from nitrification and denitrification based on nitrogen isotope model Authors: Haoming Yu; Wenxin Ba; Peter Dorsch; Wulahati Adalibieke; Yunting Fang; Longfei Yu; Chao Wang; Yihang Duan; Huayan Zhang; Benjamin Z. Houlton; Yan Bo; Yi Wei Jian; Xiao Qing Cui; Edith Bai; Feng Zhou Principal Investigator Contact Information Name: Haoming Yu Institution: Institute of Carbon Neutrality, Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing, P.R. China Address: No.100 Zhongguancun North Street, Beijing, 100871, China Email: [[e-mail]](mailto:[e-mail]) **Date of data collection:** 2023-2024 **Description:** This README file describes the data package accompanying the above publication. **Data and File overview:** **1. Yu_et_al._2025_Data_for_soil_15N_meta** Dataset of the results from filtering cropland soil 15N measured research. The columns in...,农田生态系统总氮流失中，硝化与反硝化（NO+N₂O+N₂）途径产生的气态氮（N）流失占比可观。然而，当前对NO+N₂O+N₂流失量的估算存在较大不确定性，这阻碍了全球氮收支的有效管控。 本研究在验证农田土壤δ¹⁵N与氮库的稳态假设后，构建了一款考虑氮肥施用、氨（NH₃）挥发与作物收获的新型同位素模型，并验证了该模型能否有效约束农田生态系统的NO+N₂O+N₂气态氮流失。 本研究整合了首个农田0-30cm原状土壤δ¹⁵N数据集（样本量n=738），并绘制了全球农田土壤δ¹⁵N分布图——该数据集是氮同位素模型量化NO+N₂O+N₂流失量的关键输入数据。 研究结果显示，农田土壤δ¹⁵N值介于3.5‰至9.0‰之间，平均值为6.6±0.8‰（平均值±标准偏差）。 # 数据来源：基于氮同位素模型量化农田硝化与反硝化过程土壤气态氮流失 作者：余浩鸣；巴文鑫；彼得·多尔斯奇；吴拉哈提·阿达里别克；方运霆；于龙飞；王超；段奕航；张化彦；本杰明·Z·霍尔顿；闫博；韦建祎；崔晓晴；白娥；周丰 项目负责人联系方式 姓名：余浩鸣 任职机构：北京大学城市与环境学院地表过程实验室碳中和研究所 通讯地址：中国北京市中关村北大街100号，100871 电子邮箱：[e-mail] **数据采集时间：**2023-2024年 **数据说明：** 本自述文件用于说明伴随上述发表论文的数据包。 **数据与文件概览：** 1. Yu_et_al._2025_Data_for_soil_15N_meta 农田土壤¹⁵N实测研究筛选结果数据集。该数据集的列字段包含……