Response of soil N2O emissions to precipitation pulses under different nitrogen availabilities in a semiarid temperate steppe of Inner Mongolia, China

Liu, Xinchao; Qi, Yu; Dong, Yu; Peng, Qunjia; He, Yongtao; Sun, Ling; Jia, Junqiang; Cao, Chengyou

doi:10.1007/s40333-013-0211-x

Cited by 27 publications

(11 citation statements)

References 54 publications

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“…Water addition decreased CH 4 uptake by 23.9%, which is dramatically smaller than an inhibition impact of 61% from a grassland in California [Blankinship et al, 2010 b] (Table 4). The reason is that this study site is much drier compared to California site (~300 vs. 652mm); therefore, our study has much larger CH 4 uptake rate (-5 was observed under nitrogen addition treatment (p=0.02), which is consistent with previously reported N-impact on N 2 O (0-87%) [Horváth et al, 2010;Li et al, 2012;Liu et al, 2014;Zhang and Han, 2008]. In addition, water addition had a significant stimulating impact (8.8%-120%) on N 2 O emission (p = 0.03), consistent with 0-100% reported by previous studies [Chen et al, 2013;Horváth et al, 2010;Liu et al, 2014;Zhang and Han, 2008] (Table 4).…”

Section: Comparisons With Other Studiessupporting

confidence: 90%

Interactive impacts of nitrogen input and water amendment on growing season fluxes of CO2, CH4, and N2O in a semiarid grassland, Northern China

Zhang

Hou

Guo

et al. 2017

Science of The Total Environment

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Nitrogen and water are two important factors influencing GHG (primarily CO - carbon dioxide; CH - methane, and NO - nitrous oxide) fluxes in semiarid grasslands. However, the interactive effects of nitrogen and water on GHG fluxes remain elusive. A 3-year (2010-2012) manipulative experiment was conducted to investigate the individual and interactive effects of nitrogen and water additions on GHG fluxes during growing seasons (May to September) in a semiarid grassland in Northern China. Accumulated throughout growing seasons, nitrogen input stimulated CO uptake by 3.3±1.0gCm (gN), enhanced NO emission by 1.2±0.3mgNm (gN), and decreased CH uptake by 5.2±0.9mgNm (gN); water amendment stimulated CO uptake by 0.2±0.1gCm (mmHO) and NO emission by 0.2±0.02mgNm (mmHO), decreased CH uptake by 0.3±0.1mgCm (mmHO). A synergistic effect between nitrogen and water was found on NO flux in normal year while the additive effects of nitrogen and water additions were found on CH and CO uptakes during all experiment years, and on NO emission in dry years. The nitrogen addition had stronger impacts than water amendment on stimulating CH uptake in the normal year, while water was the dominant factor affecting CH uptake in dry years. For NO emission, the N-stimulating impact was stronger in un-watered than in watered plots, and the water-stimulating impact was stronger in non-fertilized than in fertilized treatments in dry years. The interactive impacts of nitrogen and water additions on GHG fluxes advance our understanding of GHG fluxes in responses to multiple environmental factors. This data source could be valuable for validating ecosystem models in simulating GHG fluxes in a multiple factors environment.

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Section: Comparisons With Other Studiessupporting

confidence: 90%

Interactive impacts of nitrogen input and water amendment on growing season fluxes of CO2, CH4, and N2O in a semiarid grassland, Northern China

Zhang

Hou

Guo

et al. 2017

Science of The Total Environment

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“…This lack of response in soil moisture to rainfall reduction might be because precipitation is mainly concentrated in summer period, and subsurface lateral water flow reduced the effect of rainfall reduction. Although rainfall reduction had no significant effect on soil moisture; it did decrease the precipitation pulses which could cause short peak emissions of N 2 O emission 32 33 .…”

Section: Discussionmentioning

confidence: 94%

“…First, soil N 2 O emissions are influenced by numerous factors, including precipitation, temperature, forest type, and soil texture and characteristics 7 , and small changes in these variables may result in large differences in N 2 O emissions 3 . Second, N 2 O emissions are characterized by short pulse emissions related to nitrogen deposition 31 , precipitation 32 33 , freeze-thaw cycles 34 and drying-wetting events 35 . And these pulse events of N 2 O emission may be extremely important contributions to the total annual budget 30 .…”

Section: Discussionmentioning

confidence: 99%

Rainfall reduction amplifies the stimulatory effect of nitrogen addition on N2O emissions from a temperate forest soil

Geng

Chen

Han

et al. 2017

Sci Rep

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Soil is a significant source of atmospheric N2O, and soil N2O emissions at a global scale are greatly affected by environment changes that include continuous deposition of atmospheric nitrogen and changing precipitation distribution. However, to date, field simulations of multiple factors that control the interaction between nitrogen deposition and precipitation on forest soil N2O emissions are scarce. In this study, we conducted a 2-year continuous assessment of N2O emissions from November 2012 to October 2014 at a nitrogen addition and rainfall reduction manipulation platform in an old broad-leaved Korean pine mixed forest at Changbai Mountain in northeastern China. We found that N2O emissions from control plots were 1.25 ± 0.22 kg N2O-N ha−1 a−1. Nitrogen addition significantly increased N2O emissions, with the emission factor of 1.59%. A 30% reduction in rainfall decreased N2O emissions by 17–45%. However, in combination, nitrogen addition and rainfall reduction increased N2O emissions by 58–140%, with the emission factor of 3.19%, and had a larger promotional effect than the addition of nitrogen alone. Our results indicated that drought slightly decreases forest soil N2O emission; however, with increasing deposition of atmospheric N in temperate forest soils, the effect of drought might become altered to increase N2O emission.

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“…and Liu et al . (refs 31,32 ), who reported that peak N 2 O fluxes associated with coupled fertilizer-precipitation events accounted for as much as 50–60% of the total emissions. In accordance with previous literature 31,32 , peak fluxes in our study were associated with fertilizer application times coupled with precipitation events (Fig.…”

Section: Discussionmentioning

confidence: 99%

Water table management and fertilizer application impacts on CO2, N2O and CH4 fluxes in a corn agro-ecosystem

Crézé

Madramootoo

2019

Sci Rep

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Water table management with controlled drainage and subsurface-irrigation (SI) has been identified as a Beneficial Management Practice (BMP) to reduce nitrate leaching in drainage water. It has also been shown to increase crop yields during dry periods of the growing season, by providing water to the crop root zone, via upward flux or capillary rise. However, by retaining nitrates in anoxic conditions within the soil profile, SI could potentially increase greenhouse gas (GHG) fluxes, particularly N 2 O through denitrification. This process may be further exacerbated by high precipitation and mineral N-fertilizer applications very early in the growing season. In order to investigate the effects of water table management (WTM) with nitrogen fertilization on GHG fluxes from corn ( Zea mays ) agro-ecosystems, we conducted a research study on a commercial farm in south-western Quebec, Canada. Water table management treatments were: free drainage (FD) and controlled drainage with subsurface-irrigation. GHG samples were taken using field-deployed, vented non-steady state gas chambers to quantify soil CO 2 , N 2 O and CH 4 fluxes weekly. Our results indicate that fertilizer application timing coinciding with intense (≥24 mm) precipitation events and high temperatures (>25 °C) triggered pulses of N 2 O fluxes, accounting for up to 60% of cumulative N 2 O fluxes. Our results also suggest that splitting bulk fertilizer applications may be an effective mitigation strategy, reducing N 2 O fluxes by 50% in our study. In both seasons, pulse GHG fluxes mostly occurred in the early vegetative stages of the corn, prior to activation of the subsurface-irrigation. Our results suggest that proper timing of WTM mindful of seasonal climatic conditions has the potential to reduce GHG emissions.

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Response of soil N2O emissions to precipitation pulses under different nitrogen availabilities in a semiarid temperate steppe of Inner Mongolia, China

Cited by 27 publications

References 54 publications

Interactive impacts of nitrogen input and water amendment on growing season fluxes of CO2, CH4, and N2O in a semiarid grassland, Northern China

Interactive impacts of nitrogen input and water amendment on growing season fluxes of CO2, CH4, and N2O in a semiarid grassland, Northern China

Rainfall reduction amplifies the stimulatory effect of nitrogen addition on N2O emissions from a temperate forest soil

Water table management and fertilizer application impacts on CO2, N2O and CH4 fluxes in a corn agro-ecosystem

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