Nitrous oxide emissions from cow urine patches in an intensively managed grassland: Influence of nitrogen loading under contrasting soil moisture

2021 ◽  
Vol 757 ◽  
pp. 143790
Author(s):  
Bhupinder Pal Singh ◽  
Promil Mehra ◽  
Yunying Fang ◽  
Warwick Dougherty ◽  
Surinder Saggar
Keyword(s):  
Nitrous Oxide ◽  
Soil Moisture ◽  
Nitrogen Loading ◽  
Nitrous Oxide Emissions ◽  
Cow Urine ◽  
Intensively Managed

Mechanical insights into the effect of fluctuation in soil moisture on nitrous oxide emissions from paddy soil

2016 ◽  
Vol 15 (2) ◽  
pp. 359-369 ◽  
Author(s):  
Lan Ma ◽  
Yi Cheng ◽  
Jinyang Wang ◽  
Xiaoyuan Yan
Keyword(s):  
Nitrous Oxide ◽  
Soil Moisture ◽  
Paddy Soil ◽  
Nitrous Oxide Emissions

What plant functional traits can reduce nitrous oxide emissions from intensively managed grasslands?

2017 ◽  
Vol 24 (1) ◽  
pp. e248-e258 ◽  
Author(s):  
Diego Abalos ◽  
Jan Willem van Groenigen ◽  
Gerlinde B. De Deyn
Keyword(s):  
Nitrous Oxide ◽  
Functional Traits ◽  
Plant Functional Traits ◽  
Nitrous Oxide Emissions ◽  
Intensively Managed

The effect of urinary nitrogen loading rate and a nitrification inhibitor on nitrous oxide emissions from a temperate grassland soil

2014 ◽  
Vol 152 (S1) ◽  
pp. 159-171 ◽  
Author(s):  
D. R. SELBIE ◽  
K. C. CAMERON ◽  
H. J. DI ◽  
J. L. MOIR ◽  
G. J. LANIGAN ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Loading Rate ◽  
Nitrification Inhibitor ◽  
N Deposition ◽  
Nitrogen Loading ◽  
Nitrous Oxide Emissions ◽  
Curvilinear Relationship ◽  
Grassland Soil ◽  
Domestic Livestock ◽  
N Loading

SUMMARYNitrous oxide (N2O) emissions associated with urine nitrogen (N) deposition during grazing are a major component of greenhouse gas emissions from domestic livestock. The present study investigated the relationship between urine N loading rate and the efficacy of a nitrification inhibitor, dicyandiamide (DCD), on cumulative N2O emissions from a grassland soil in Ireland over 80 and 360-day periods in 2009/10 and 2010/11. A diminishing curvilinear relationship between urine N rate and cumulative N2O emissions was observed in both years. Despite this increase in cumulative N2O emissions, the emission factor (EF3) for N2O decreased with increasing urine N rate from, on average, 0·24 to 0·10% (urine applied at 300 and 1000 kg N/ha, respectively), during an 80-day measurement period. This was probably the result of a factor other than N, such as carbon (C), limiting the production of N2O. The efficacy of DCD varied with urine N loading rate, and inter-annual variability in efficacy was also observed. Dicyandiamide was effective at reducing N2O production for 50–80 days after urine application, which accounted for the major period of elevated daily flux. However, DCD was ineffective at reducing N2O production after this period, which was likely a result of its removal from the soil via degradation and leaching.

scholarly journals Lime and Soil Moisture Effects on Nitrous Oxide Emissions from a Urine Patch

2004 ◽  
Vol 68 (5) ◽  
pp. 1600-1609 ◽  
Author(s):  
Tim J. Clough ◽  
Francis M. Kelliher ◽  
Robert R. Sherlock ◽  
Colleen D. Ford
Keyword(s):  
Nitrous Oxide ◽  
Soil Moisture ◽  
Nitrous Oxide Emissions ◽  
Moisture Effects ◽  
Urine Patch

Nitrogen Loading and Nitrous Oxide Emissions from a River with Multiple Hydroelectric Reservoirs

2015 ◽  
Vol 94 (5) ◽  
pp. 633-639 ◽  
Author(s):  
Jinsong Chen ◽  
Wenzhi Cao ◽  
Di Cao ◽  
Zheng Huang ◽  
Ying Liang
Keyword(s):  
Nitrous Oxide ◽  
Nitrogen Loading ◽  
Nitrous Oxide Emissions ◽  
Hydroelectric Reservoirs

scholarly journals Soil Moisture but Not Warming Dominates Nitrous Oxide Emissions During Freeze–Thaw Cycles in a Qinghai–Tibetan Plateau Alpine Meadow With Discontinuous Permafrost

2021 ◽  
Vol 9 ◽  
Author(s):  
Zhe Chen ◽  
Shidong Ge ◽  
Zhenhua Zhang ◽  
Yangong Du ◽  
Buqing Yao ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Soil Moisture ◽  
Tibetan Plateau ◽  
Active Layer ◽  
Alpine Meadow ◽  
Nitrous Oxide Emissions ◽  
Freeze Thaw ◽  
Discontinuous Permafrost ◽  
Significant Difference

Large quantities of organic matter are stored in frozen soils (permafrost) within the Qinghai–Tibetan Plateau (QTP). The most of QTP regions in particular have experienced significant warming and wetting over the past 50 years, and this warming trend is projected to intensify in the future. Such climate change will likely alter the soil freeze–thaw pattern in permafrost active layer and toward significant greenhouse gas nitrous oxide (N2O) release. However, the interaction effect of warming and altered soil moisture on N2O emission during freezing and thawing is unclear. Here, we used simulation experiments to test how changes in N2O flux relate to different thawing temperatures (T5–5°C, T10–10°C, and T20–20°C) and soil volumetric water contents (VWCs, W15–15%, W30–30%, and W45–45%) under 165 F–T cycles in topsoil (0–20 cm) of an alpine meadow with discontinuous permafrost in the QTP. First, in contrast to the prevailing view, soil moisture but not thawing temperature dominated the large N2O pulses during F–T events. The maximum emissions, 1,123.16–5,849.54 μg m–2 h–1, appeared in the range of soil VWC from 17% to 38%. However, the mean N2O fluxes had no significant difference between different thawing temperatures when soil was dry or waterlogged. Second, in medium soil moisture, low thawing temperature is more able to promote soil N2O emission than high temperature. For example, the peak value (5,849.54 μg m–2 h–1) and cumulative emissions (366.6 mg m–2) of W30T5 treatment were five times and two to four times higher than W30T10 and W30T20, respectively. Third, during long-term freeze–thaw cycles, the patterns of cumulative N2O emissions were related to soil moisture. treatments; on the contrary, the cumulative emissions of W45 treatments slowly increased until more than 80 cycles. Finally, long-term freeze–thaw cycles could improve nitrogen availability, prolong N2O release time, and increase N2O cumulative emission in permafrost active layer. Particularly, the high emission was concentrated in the first 27 and 48 cycles in W15 and W30, respectively. Overall, our study highlighted that large emissions of N2O in F–T events tend to occur in medium moisture soil at lower thawing temperature; the increased number of F–T cycles may enhance N2O emission and nitrogen mineralization in permafrost active layer.

scholarly journals Nitrous oxide emissions from a commercial cornfield (<i>Zea mays</i>) measured using the eddy-covariance technique

2014 ◽  
Vol 14 (14) ◽  
pp. 20417-20460 ◽  
Author(s):  
H. Huang ◽  
J. Wang ◽  
D. Hui ◽  
D. R. Miller ◽  
S. Bhattarai ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Soil Moisture ◽  
Soil Temperature ◽  
Eddy Covariance ◽  
Growing Season ◽  
Fast Response ◽  
Nitrous Oxide Emissions ◽  
N2o Emissions ◽  
N2o Flux ◽  
Flux Measurements

Abstract. Increases in observed atmospheric concentrations of the long-lived greenhouse gas, nitrous oxide (N2O), have been well documented. However, information on event-related instantaneous emissions during fertilizer applications is lacking. With the development of fast-response N2O analyzers, the eddy covariance (EC) technique can be used to gather instantaneous measurements of N2O concentrations to quantify the exchange of nitrogen between the soil and atmosphere. The objectives of this study were to evaluate the performance of a new EC system, to measure the N2O flux with the system, and finally to examine relationships of the N2O flux with soil temperature, soil moisture, precipitation, and fertilization events. We assembled an EC system that included a sonic anemometer and a fast-response N2O analyzer (quantum cascade laser spectrometer) in a cornfield in Nolensville, Tennessee during the 2012 corn growing season (4 April–8 August). Fertilizer amounts totaling 217 kg N ha−1 were applied to the experimental site. The precision of the instrument was 0.066 ppbv for 10 Hz measurements. The seasonal mean detection limit of the N2O flux measurements was 2.10 ng N m−2 s−1. This EC system can be used to provide reliable N2O flux measurements. The cumulative emitted N2O for the entire growing season was 6.87 kg N2O-N ha−1. The 30 min average N2O emissions ranged from 0 to 11 100 μg N2O{-}N m−2 h−1 (mean = 257.5, standard deviation = 817.7). Average daytime emissions were much higher than night emissions (278.8 ± 865.8 vs. 100.0 ± 210.0 μg N2O-N m−2 h−1). Seasonal fluxes were highly dependent on soil moisture rather than soil temperature, although the diurnal flux was positively related to soil temperature. This study was one of the few experiments that continuously measured instantaneous, high-frequency N2O emissions in crop fields over a growing season of more than 100 days.

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