Effect of nitrogen addition on N 2 O emission from soils during freeze–thaw periods
Bibliographic Data
| ID | 15546153 |
|---|---|
| Authors | Fang Liu (0000-0002-7132-354X, Institute of Mountain Hazards and Environment, corresponding author), Wei Zhang (0000-0002-5458-9581), Jing Li (0000-0001-7792-4322, Fujian Agriculture and Forestry University), Yong Li (0000-0002-4884-9930, Institute of Atmospheric Physics), Xunhua Zheng (0000-0002-4138-7470, Henan Normal University), Siqi Li (0009-0005-6425-1233, Chinese Academy of Meteorological Sciences) |
| Year | 2026 |
| Volume | 21 |
| Issue | 6 |
| Pages | 064019-064019 |
| Publication date | 2026-03-04 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Environmental Research Letters (JOURNAL) |
| Journal identifiers | ISSN: 1748-9326 • E-ISSN: 1748-9326 |
| Publisher | IOP Publishing (PUBLISHER • GB) |
| DOI | 10.1088/1748-9326/ae4d61 |
| OpenAlex | W7133537880 |
| Language | EN |
| References cited | 89 |
Increased nitrogen (N) availability resulting from N addition may modify N turnover and nitrous oxide (N 2 O) emissions in regions experiencing freeze–thaw cycles, where relatively high N 2 O emissions from soils are frequently reported during freeze–thaw periods. However, the response of soil N 2 O emissions during freeze–thaw periods to N addition remains unclear. In this study, we compiled 675 paired observational cases from 36 peer-reviewed articles to perform a meta-analysis assessing the effects of N addition on N 2 O emissions during freeze–thaw periods and to identify the associated key factors. Our results indicated that N additions increased the available soil N pool, thereby enhancing N 2 O emissions ( ln R ′ ― was 0.795 with a range of 0.7–0.89 at a 95% confidence interval) primarily associated with denitrification processes during freeze–thaw periods. N additions during the previous fall had the most significant impact on increasing N 2 O emissions during the subsequent freeze–thaw periods. The application of manure and NO 3 − fertilizer has been shown to significantly enhance N 2 O emissions compared to other fertilizer types. The rate of N addition directly contributed positively to N 2 O emissions during freeze–thaw periods. Altitude was identified as the primary factor influencing N 2 O emissions in response to N addition. Along the altitudinal gradient, the increase in N 2 O emissions resulting from N addition was more pronounced at lower altitudes ( 3000 m). Our meta-analysis elucidates the stimulatory effects of N addition on N 2 O emissions during freeze–thaw periods, identifying denitrification and soil N availability as primary drivers. Crucially, our findings indicate that projected increases in anthropogenic N inputs, when coupled with the climate-induced intensification of freeze–thaw cycles and snow cover reductions, could substantially amplify non-growing season N 2 O pulses. This synergistic interaction constitutes a critical, yet potentially underestimated, positive feedback mechanism in global N 2 O budgets and climate projections
Altitude (triangle · Denitrification · Fertilizer · Manure · Nitrogen · Nitrous oxide · Soil water · Soil Carbon and Nitrogen Dynamics · Soil Geostatistics and Mapping · Soil Moisture and Remote Sensing
| Citation velocity | historical |
|---|---|
| Highly cited | No |