Quantifying Soil Gaseous Nitrogen Losses From Nitrification and Denitrification Based on Nitrogen Isotope Model

IF 5.4 2区 地球科学 Q1 ENVIRONMENTAL SCIENCES
Haoming Yu, Wenxin Ba, Peter Dörsch, 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
{"title":"Quantifying Soil Gaseous Nitrogen Losses From Nitrification and Denitrification Based on Nitrogen Isotope Model","authors":"Haoming Yu,&nbsp;Wenxin Ba,&nbsp;Peter Dörsch,&nbsp;Wulahati Adalibieke,&nbsp;Yunting Fang,&nbsp;Longfei Yu,&nbsp;Chao Wang,&nbsp;Yihang Duan,&nbsp;Huayan Zhang,&nbsp;Benjamin Z. Houlton,&nbsp;Yan Bo,&nbsp;Yi Wei Jian,&nbsp;Xiao Qing Cui,&nbsp;Edith Bai,&nbsp;Feng Zhou","doi":"10.1029/2024GB008376","DOIUrl":null,"url":null,"abstract":"<p>Gaseous nitrogen (N) losses from nitrification and denitrification (NO + N<sub>2</sub>O + N<sub>2</sub>) pathways contribute a significant fraction of the total N losses from cropland ecosystems. The N mass balance and process-based models are commonly applied to estimate the NO + N<sub>2</sub>O + N<sub>2</sub> losses but have suffered from systematic error accumulations or model over-parameterization, leading to a large uncertainty in estimation, hindering effective management of the global N budget. Here, we proposed a novel N isotope model, which considers fertilizer, ammonia volatilization and harvest after testing steady-state assumption of soil δ<sup>15</sup>N and N pool for croplands, and justified if it could be successfully applied to constrain NO + N<sub>2</sub>O + N<sub>2</sub> losses from cropland ecosystems. We compiled the first bulk-soil δ<sup>15</sup>N data set of 0–30 cm soils (<i>n</i> = 738) from croplands and produced a global map of cropland soil δ<sup>15</sup>N, which is crucial input data for an isotope model to quantify NO + N<sub>2</sub>O + N<sub>2</sub> losses. The results show that the cropland soil δ<sup>15</sup>N ranges from 3.5 to 9.0‰, with a mean value of 6.6 ± 0.8‰ (mean ± standard deviation). The estimated NO + N<sub>2</sub>O + N<sub>2</sub> losses accounted for an average of 17 ± 9% of N outputs and were 35.86 ± 24.17 kg N ha<sup>−1</sup> yr<sup>−1</sup> in China's rice paddies, with an increasing trend from Central China to South or North China. The estimations were comparable with the results from observation-constrained denitrification-decomposition modeling (38.9 ± 4.8 kg N ha<sup>−1</sup> yr<sup>−1</sup>) and in good agreement with experimental observations at site scale (<i>R</i><sup>2</sup> = 0.58). Our results suggest that soil N isotopes, as a quantitative tracer, provide a valuable alternative approach to constrain the NO + N<sub>2</sub>O + N<sub>2</sub> losses in croplands at large geographic scales.</p>","PeriodicalId":12729,"journal":{"name":"Global Biogeochemical Cycles","volume":"39 4","pages":""},"PeriodicalIF":5.4000,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Global Biogeochemical Cycles","FirstCategoryId":"89","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1029/2024GB008376","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0

Abstract

Gaseous nitrogen (N) losses from nitrification and denitrification (NO + N2O + N2) pathways contribute a significant fraction of the total N losses from cropland ecosystems. The N mass balance and process-based models are commonly applied to estimate the NO + N2O + N2 losses but have suffered from systematic error accumulations or model over-parameterization, leading to a large uncertainty in estimation, hindering effective management of the global N budget. Here, we proposed a novel N isotope model, which considers fertilizer, ammonia volatilization and harvest after testing 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 data set of 0–30 cm soils (n = 738) from croplands and produced a global map of cropland soil δ15N, which is crucial input data for an 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 ± 9% of N outputs and were 35.86 ± 24.17 kg N ha−1 yr−1 in China's rice paddies, with an increasing trend from Central China to South or North China. The estimations were comparable with the results from observation-constrained denitrification-decomposition modeling (38.9 ± 4.8 kg N ha−1 yr−1) and in good agreement with experimental observations at site scale (R2 = 0.58). Our results suggest that soil N isotopes, as a quantitative tracer, provide a valuable alternative approach to constrain the NO + N2O + N2 losses in croplands at large geographic scales.

求助全文
约1分钟内获得全文 求助全文
来源期刊
Global Biogeochemical Cycles
Global Biogeochemical Cycles 环境科学-地球科学综合
CiteScore
8.90
自引率
7.70%
发文量
141
审稿时长
8-16 weeks
期刊介绍: Global Biogeochemical Cycles (GBC) features research on regional to global biogeochemical interactions, as well as more local studies that demonstrate fundamental implications for biogeochemical processing at regional or global scales. Published papers draw on a wide array of methods and knowledge and extend in time from the deep geologic past to recent historical and potential future interactions. This broad scope includes studies that elucidate human activities as interactive components of biogeochemical cycles and physical Earth Systems including climate. Authors are required to make their work accessible to a broad interdisciplinary range of scientists.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信