Precipitation and nitrogen application stimulate soil nitrous oxide emission

Huiling Zhang; Qi Deng; Christopher W. Schadt; Melanie A. Mayes; Deqiang Zhang; Dafeng Hui

doi:10.1007/s10705-021-10155-4

Precipitation and nitrogen application stimulate soil nitrous oxide emission

Huiling Zhang, Qi Deng, Christopher W. Schadt, Melanie A. Mayes, Deqiang Zhang, Dafeng Hui

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

Precipitation and nitrogen (N) fertilization are the two most important drivers for soil nitrous oxide (N₂O) emission. However, the effects of changes in N fertilization and precipitation patterns (i.e., precipitation intensity and frequency) on N₂O emissions in agricultural fields are still unclear. In this study, we simulated soil N₂O emission under different precipitation patterns (6 precipitation intensities, and 12 precipitation frequencies by either merging or splitting precipitation events) and N fertilization rates (low, typical, and high N fertilization) in a cornfield using the DeNitrification-DeComposition model. The model was parameterized and validated using meteorological data and N experimental measurements in Nashville, Tennessee, USA. Results showed that soil water filled pore space (WFPS) and simulated soil N₂O emission increased as precipitation intensity increased. Less frequent but high intensity precipitation treatments reduced the soil WFPS by 25.2% and stimulated soil N₂O emission by 45.3%, while more frequent but low intensity precipitation treatments increased soil WFPS by 9.0% and reduced soil N₂O emission by 23.9%. Compared to typical N fertilization, the sensitivity of soil N₂O emission to precipitation was higher under high N than low N fertilization treatments, and the response ratios were 50.0% and 40.1%, respectively. There was significant interactive effect of precipitation intensity and N fertilization on soil N₂O emission. These findings improved our understanding of precipitation and N impacts on soil N₂O emissions and provided useful knowledge for irrigation and N fertilizer management in agriculture to mitigate greenhouse gas emissions.

Original language	English
Pages (from-to)	363-378
Number of pages	16
Journal	Nutrient Cycling in Agroecosystems
Volume	120
Issue number	3
DOIs	https://doi.org/10.1007/s10705-021-10155-4
State	Published - Jul 2021

Funding

This research was partially supported by the National Science Foundation (NSF) TIP (1623085), MRI (1919897), and EiR (1900885, 2000058) projects. We gratefully acknowledge financial support from China Scholarship Council (CSC: 201804910689) to HZ, and the Oak Ridge National Laboratory/Oak Ridge Associated Universities HBCU/MEI Faculty Summer Research Program to DH. DZ was supported by National Natural Science Foundation of China (41773088). MAM was financially supported by the U.S. Department of Energy (DOE) Office of Biological and Environmental Research through the Terrestrial Ecosystem Science Scientific Focus Area at Oak Ridge National Laboratory (ORNL). ORNL is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the U.S. DOE.

Funders	Funder number
TIP
National Science Foundation	1919897, 1623085, 1900885, 2000058
U.S. Department of Energy
Biological and Environmental Research
Oak Ridge National Laboratory	DE-AC05-00OR22725
Materials Research Institute, Pennsylvania State University
National Natural Science Foundation of China	41773088
China Scholarship Council	201804910689

Keywords

DNDC model
NO emission
Nitrogen fertilization
Precipitation pattern

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/s10705-021-10155-4

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title = "Precipitation and nitrogen application stimulate soil nitrous oxide emission",

abstract = "Precipitation and nitrogen (N) fertilization are the two most important drivers for soil nitrous oxide (N2O) emission. However, the effects of changes in N fertilization and precipitation patterns (i.e., precipitation intensity and frequency) on N2O emissions in agricultural fields are still unclear. In this study, we simulated soil N2O emission under different precipitation patterns (6 precipitation intensities, and 12 precipitation frequencies by either merging or splitting precipitation events) and N fertilization rates (low, typical, and high N fertilization) in a cornfield using the DeNitrification-DeComposition model. The model was parameterized and validated using meteorological data and N experimental measurements in Nashville, Tennessee, USA. Results showed that soil water filled pore space (WFPS) and simulated soil N2O emission increased as precipitation intensity increased. Less frequent but high intensity precipitation treatments reduced the soil WFPS by 25.2% and stimulated soil N2O emission by 45.3%, while more frequent but low intensity precipitation treatments increased soil WFPS by 9.0% and reduced soil N2O emission by 23.9%. Compared to typical N fertilization, the sensitivity of soil N2O emission to precipitation was higher under high N than low N fertilization treatments, and the response ratios were 50.0% and 40.1%, respectively. There was significant interactive effect of precipitation intensity and N fertilization on soil N2O emission. These findings improved our understanding of precipitation and N impacts on soil N2O emissions and provided useful knowledge for irrigation and N fertilizer management in agriculture to mitigate greenhouse gas emissions.",

keywords = "DNDC model, NO emission, Nitrogen fertilization, Precipitation pattern",

author = "Huiling Zhang and Qi Deng and Schadt, {Christopher W.} and Mayes, {Melanie A.} and Deqiang Zhang and Dafeng Hui",

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AU - Hui, Dafeng

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N2 - Precipitation and nitrogen (N) fertilization are the two most important drivers for soil nitrous oxide (N2O) emission. However, the effects of changes in N fertilization and precipitation patterns (i.e., precipitation intensity and frequency) on N2O emissions in agricultural fields are still unclear. In this study, we simulated soil N2O emission under different precipitation patterns (6 precipitation intensities, and 12 precipitation frequencies by either merging or splitting precipitation events) and N fertilization rates (low, typical, and high N fertilization) in a cornfield using the DeNitrification-DeComposition model. The model was parameterized and validated using meteorological data and N experimental measurements in Nashville, Tennessee, USA. Results showed that soil water filled pore space (WFPS) and simulated soil N2O emission increased as precipitation intensity increased. Less frequent but high intensity precipitation treatments reduced the soil WFPS by 25.2% and stimulated soil N2O emission by 45.3%, while more frequent but low intensity precipitation treatments increased soil WFPS by 9.0% and reduced soil N2O emission by 23.9%. Compared to typical N fertilization, the sensitivity of soil N2O emission to precipitation was higher under high N than low N fertilization treatments, and the response ratios were 50.0% and 40.1%, respectively. There was significant interactive effect of precipitation intensity and N fertilization on soil N2O emission. These findings improved our understanding of precipitation and N impacts on soil N2O emissions and provided useful knowledge for irrigation and N fertilizer management in agriculture to mitigate greenhouse gas emissions.

AB - Precipitation and nitrogen (N) fertilization are the two most important drivers for soil nitrous oxide (N2O) emission. However, the effects of changes in N fertilization and precipitation patterns (i.e., precipitation intensity and frequency) on N2O emissions in agricultural fields are still unclear. In this study, we simulated soil N2O emission under different precipitation patterns (6 precipitation intensities, and 12 precipitation frequencies by either merging or splitting precipitation events) and N fertilization rates (low, typical, and high N fertilization) in a cornfield using the DeNitrification-DeComposition model. The model was parameterized and validated using meteorological data and N experimental measurements in Nashville, Tennessee, USA. Results showed that soil water filled pore space (WFPS) and simulated soil N2O emission increased as precipitation intensity increased. Less frequent but high intensity precipitation treatments reduced the soil WFPS by 25.2% and stimulated soil N2O emission by 45.3%, while more frequent but low intensity precipitation treatments increased soil WFPS by 9.0% and reduced soil N2O emission by 23.9%. Compared to typical N fertilization, the sensitivity of soil N2O emission to precipitation was higher under high N than low N fertilization treatments, and the response ratios were 50.0% and 40.1%, respectively. There was significant interactive effect of precipitation intensity and N fertilization on soil N2O emission. These findings improved our understanding of precipitation and N impacts on soil N2O emissions and provided useful knowledge for irrigation and N fertilizer management in agriculture to mitigate greenhouse gas emissions.

KW - DNDC model

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Precipitation and nitrogen application stimulate soil nitrous oxide emission

Abstract

Funding

Keywords

UN SDGs

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