Can N Fertilizer Addition Affect N2O Isotopocule Signatures for Soil N2O Source Partitioning
Bibliographic Data
| ID | 15509331 |
|---|---|
| Authors | Zhang Peiyi (Nanjing Normal University), Peiyi Zhang (0000-0003-0207-1112, Nanjing Normal University), Teng Wen (Nanjing Normal University, corresponding author), Yangmei Hu (0009-0001-1431-5113, Nanjing Normal University), Jinbo Zhang (0000-0002-5659-7921, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application), Zucong Cai (0000-0001-7354-3581, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application) |
| Year | 2021 |
| Volume | 18 |
| Issue | 9 |
| Pages | 5024-5024 |
| Publication date | 2021-05-10 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | International Journal of Environmental Research and Public Health (JOURNAL) |
| Journal identifiers | ISSN: 1661-7827 • E-ISSN: 1660-4601 |
| Publisher | Multidisciplinary Digital Publishing Institute (PUBLISHER • CH) |
| DOI | 10.3390/ijerph18095024 |
| PMID | 34068614 |
| OpenAlex | W3162382826 |
| Language | EN |
| References cited | 35 |
Isotopocule signatures of N 2 O (δ 15 N bulk , δ 18 O and site preference) are useful for discerning soil N 2 O source, but sometimes, N fertilizer is needed to ensure that there is enough N 2 O flux for accurate isotopocule measurements. However, whether fertilizer affects these measurements is unknown. This study evaluated a gradient of NH 4 NO 3 addition on N 2 O productions and isotopocule values in two acidic subtropical soils. The results showed that N 2 O production rates obviously amplified with increasing NH 4 NO 3 ( p 2 O production rate and an increasing extent appeared in forest soil. The δ 15 N bulk of N 2 O produced in forest soil was progressively enriched when more NH 4 NO 3 was added, while becoming more depleted of agricultural soil. Moreover, the N 2 O site preference (SP) values collectively elevated with increasing NH 4 NO 3 in both soils, indicating that N 2 O contributions changed. The increased N 2 O production in agricultural soil was predominantly due to the added NH 4 NO 3 via autotrophic nitrification and fungal denitrification (beyond 50%), which significantly increased with added NH 4 NO 3 , whereas soil organic nitrogen contributed most to N 2 O production in forest soil, probably via heterotrophic nitrification. Lacking the characteristic SP of heterotrophic nitrification, its N 2 O contribution change cannot be accurately identified yet. Overall, N fertilizer should be applied strictly according to the field application rate or N deposition amount when using isotopocule signatures to estimate soil N 2 O processes
Agronomy · Autotroph · Biology · Denitrification · Fertilizer · Heterotroph · Nitrification · Nitrogen · Soil pH · Soil water · Chemistry · Environmental Science · Groundwater and Isotope Geochemistry · Soil and Water Nutrient Dynamics · Soil Carbon and Nitrogen Dynamics · Environmental Chemistry · Soil Science
| Citation velocity | historical |
|---|---|
| Highly cited | No |