Precipitation and nitrogen application stimulate soil nitrous oxide emission
Precipitation and nitrogen application stimulate soil nitrous oxide emission
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降水和施氮刺激土壤一氧化二氮排放
DOI：
10.1007/s10705-021-10155-4
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发表时间：
2021-06
影响因子：
3.1
通讯作者：
Hui DF
中科院分区：
文献类型：
--
作者：
Zhang HL;Deng Q;Schadt. CW;Mayes MA;Zhang DQ;Hui DF
降水和施氮是土壤氧化亚氮排放的两个最重要的驱动因子。然而，氮肥和降水模式变化的影响（即，降水强度和频率）对农田N2 O排放的影响尚不清楚。在这项研究中，我们模拟了土壤N2 O排放在不同的降水模式（6个降水强度，12个降水频率，无论是合并或分裂降水事件）和氮施肥率（低，典型，高N施肥）在玉米田使用反硝化-DeComposition模型。利用美国田纳西州纳什维尔的气象资料和氮素实验测量数据对模型进行了参数化和验证。结果表明，随着降水强度的增加，土壤孔隙水填充量（WFPS）和模拟土壤N2 O排放量增加。低频率高强度降水处理降低了25.2%，促进了45.3%的土壤N2 O排放，而高频率低强度降水处理提高了9.0%，降低了23.9%。与典型施氮处理相比，高氮处理土壤N2 O排放对降水的敏感性高于低氮处理，响应率分别为50.0%和40.1%。降水强度和施氮量对土壤N2 O排放有显著的交互作用。这些研究结果提高了我们对降水和氮对土壤N2 O排放影响的认识，并为农业灌溉和氮肥管理提供了有用的知识，以减少温室气体排放。
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.
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DOI：
10.1016/j.scitotenv.2018.07.364
发表时间：
2019
期刊：
The Science of the total environment
影响因子：
--
作者：
M. Foltz;J. Zilles;S. Koloutsou-Vakakis
通讯作者：
M. Foltz;J. Zilles;S. Koloutsou-Vakakis
影响因子：
6.7
作者：
Yajie Zhang;Haishan Niu;Shiping Wang;Kun Xu;Rui Wang
通讯作者：
Yajie Zhang;Haishan Niu;Shiping Wang;Kun Xu;Rui Wang
影响因子：
3.7
作者：
Y. Kwack;K. Kobayashi
通讯作者：
Y. Kwack;K. Kobayashi
影响因子：
4.4
作者：
LI, CS;FROLKING, S;FROLKING, TA
通讯作者：
FROLKING, TA
影响因子：
9.7
作者：
Fierer, N;Schimel, JP
通讯作者：
Schimel, JP