Characteristics of N 2 and N 2 O Fluxes from a Cultivated Black Soil: A Case Study through In Situ Measurement Using the 15 N Gas Flux Method

Zhanlei Pan, Rui Wang (), Yan Liu, Lin Wang, Xunhua Zheng, Zhisheng Yao, Hongbo He and Xiaochen Zhang
Additional contact information
Zhanlei Pan: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
Rui Wang: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
Yan Liu: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
Lin Wang: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
Xunhua Zheng: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
Zhisheng Yao: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
Hongbo He: Key Laboratory of Pollution Ecology and Environment Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
Xiaochen Zhang: Key Laboratory of Pollution Ecology and Environment Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China

Agriculture, 2022, vol. 12, issue 10, 1-23

Abstract: The magnitudes and source partitioning of soil dinitrogen (N 2 ) and nitrous oxide (N 2 O) emissions are not well documented, yet. To address both issues for black soil subject to a typical cool temperate climate, soil N 2 O and N 2 fluxes following the basal application event of an ammonium-based fertilizer (labeled by 15 N) for maize were simultaneously measured in situ by using the 15 N gas flux ( 15 NFG) method. During the two-month field experiment, the measured N 2 and N 2 O fluxes cumulated to 1.61 ± 0.47 and 0.12 ± 0.01 kg N ha −1 , respectively, showing N 2 O to N 2 O plus N 2 ratios ( R N 2 O ) of 0.02–0.31 (0.15 on average). Temperature was identified as a key factor regulating the total soil N 2 fluxes ( r 2 = 0.27, p < 0.01), despite the N 2 fluxes originated from nitrate denitrification related to dissolved organic carbon concentrations ( r 2 = 0.39, p < 0.01). Differently, both temperature and soil moisture jointly accounted for 85% and 74% of the variances in the N 2 O fluxes and the R N 2 O values, respectively ( p < 0.01). Moreover, the process(es) other than autotrophic nitrification and heterotrophic denitrification could be of substantial importance for the soil N 2 O emissions. Our findings emphasized the importance of temperature in regulating N 2 emissions from black soil and the possible site- and/or time specificity of a soil factors-based parametrization of R N 2 O . In addition, this study implicates that labeling a nitrogen substrate of nitrification while using the 15 N enrichment of N 2 O is necessary to more accurately quantify total soil N 2 fluxes in situ by using the 15 NFG approach even though further confirmation in future studies is still needed.

Keywords: N 2 flux; N 2 O flux; N 2 O/(N 2 O + N 2 ) ratio; nitrification; denitrification; 15 N gas flux method (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2077-0472/12/10/1664/pdf (application/pdf)
https://www.mdpi.com/2077-0472/12/10/1664/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jagris:v:12:y:2022:i:10:p:1664-:d:938882

Access Statistics for this article

Agriculture is currently edited by Ms. Leda Xuan

More articles in Agriculture from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().