Reducing Nitrous Oxide Emissions in Turfgrass with Better Management Practices

CSA News ◽  
2018 ◽  
Vol 63 (8) ◽  
pp. 10-10
Keyword(s):  
Nitrous Oxide ◽  
Management Practices ◽  
Nitrous Oxide Emissions

Soil nitrous oxide emissions under different management practices in the semiarid region of the Argentinian Pampas

2012 ◽  
Vol 94 (2-3) ◽  
pp. 209-220 ◽  
Author(s):  
Carolina Alvarez ◽  
Alejandro Costantini ◽  
Carina R. Alvarez ◽  
Bruno J. R. Alves ◽  
Claudia P. Jantalia ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Management Practices ◽  
Nitrous Oxide Emissions ◽  
Semiarid Region

scholarly journals Soil Management Practices to Mitigate Nitrous Oxide Emissions and Inform Emission Factors in Arid Irrigated Specialty Crop Systems

Soil Systems ◽  
2019 ◽  
Vol 3 (4) ◽  
pp. 76
Author(s):  
Xia Zhu-Barker ◽  
Mark Easter ◽  
Amy Swan ◽  
Mary Carlson ◽  
Lucas Thompson ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Crop Production ◽  
Management Practices ◽  
Ghg Emissions ◽  
Soil Management ◽  
Emission Factors ◽  
Nitrous Oxide Emissions ◽  
Specialty Crops ◽  
Specialty Crop ◽  
The Impact

Greenhouse gas (GHG) emissions from arid irrigated agricultural soil in California have been predicted to represent 8% of the state’s total GHG emissions. Although specialty crops compose the majority of the state’s crops in both economic value and land area, the portion of GHG emissions contributed by them is still highly uncertain. Current and emerging soil management practices affect the mitigation of those emissions. Herein, we review the scientific literature on the impact of soil management practices in California specialty crop systems on GHG nitrous oxide emissions. As such studies from most major specialty crop systems in California are limited, we focus on two annual and two perennial crops with the most data from the state: tomato, lettuce, wine grapes and almond. Nitrous oxide emission factors were developed and compared to Intergovernmental Panel on Climate Change (IPCC) emission factors, and state-wide emissions for these four crops were calculated for specific soil management practices. Dependent on crop systems and specific management practices, the emission factors developed in this study were either higher, lower or comparable to IPCC emission factors. Uncertainties caused by low gas sampling frequency in these studies were identified and discussed. These uncertainties can be remediated by robust and standardized estimates of nitrous oxide emissions from changes in soil management practices in California specialty crop systems. Promising practices to reduce nitrous oxide emissions and meet crop production goals, pertinent gaps in knowledge on this topic and limitations of this approach are discussed.

Low seasonal nitrous oxide emissions in tea tree farming systems following nitrogen fertilisation using poultry litter application or green manure legumes

Soil Research ◽  
2020 ◽  
Vol 58 (3) ◽  
pp. 238
Author(s):  
Terry J. Rose ◽  
Lee J. Kearney ◽  
Stephen Morris ◽  
Lukas Van Zwieten
Keyword(s):  
Nitrous Oxide ◽  
Faba Bean ◽  
Green Manure ◽  
Management Practices ◽  
Poultry Litter ◽  
Practice Change ◽  
Nitrous Oxide Emissions ◽  
N2o Emissions ◽  
Tea Tree ◽  
Legume Crops

The integration of legumes into coppiced tree crop systems to replace some or all of the external nitrogen (N) fertiliser requirements may be one means to lower seasonal nitrous oxide (N2O) emissions. We investigated soil N2O emissions using static chamber methodology in field trials located within two commercial tea tree (Melaleuca alternifolia) plantations (Casino and Tweed Heads) where N (116 and 132 kg N ha–1 respectively) was supplied via poultry litter application (5 t wet ha–1) or by termination of annual legumes (soybean or mung bean) grown in the inter-row. While there was no treatment effect at the Tweed Heads site, both legume treatments had significantly (P = 0.01) lower cumulative N2O emissions (0.33 and 0.30 kg N2O-N ha–1 season–1 for soybean and mung beans respectively) than the poultry litter treatment (0.66 kg N2O-N ha–1 season–1) at the Casino site. However, the amount of N added to soils in each treatment was not identical owing to an inability to accurately predict N inputs by legume crops, and thus differences could not be attributed to the N source. A third site was thus established at Leeville comparing N2O emissions from poultry litter amendment (5 t wet ha–1 contributing 161 kg N ha–1) to an inter-row faba bean crop (contributing 92 kg N ha–1) and a nil-N control. Cumulative seasonal N2O emissions were significantly (P < 0.05) lower in the faba bean treatment than the poultry litter treatment (0.08 and 0.23 kg N2O-N ha–1 season–1 respectively), but owing to different N inputs and generally low emissions, it was not possible to draw definitive conclusions on whether green manure legume crops can lower N2O emissions. Overall, soil N2O emissions in coppiced tea tree systems under current management practices were very low, offering limited potential to reduce seasonal N2O emissions through management practice change.

scholarly journals Assessing Seasonal Methane and Nitrous Oxide Emissions from Furrow-Irrigated Rice with Cover Crops

Agriculture ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 261
Author(s):  
Sandhya Karki ◽  
M. Arlene A. Adviento-Borbe ◽  
Joseph H. Massey ◽  
Michele L. Reba
Keyword(s):  
Nitrous Oxide ◽  
Cover Crops ◽  
Management Practices ◽  
Irrigation Management ◽  
Nitrous Oxide Emissions ◽  
N2o Emissions ◽  
Irrigated Rice ◽  
Cereal Rye ◽  
Ch4 Emissions ◽  
Ch4 And N2o

Improved irrigation management is identified as a potential mitigation option for methane (CH4) emissions from rice (Oryza sativa). Furrow-irrigated rice (FR), an alternative method to grow rice, is increasingly adopted in the Mid-South U.S. However, FR may provide a potential risk to yield performance and higher emissions of nitrous oxide (N2O). This study quantified the grain yields, CH4 and N2O emissions from three different water management practices in rice: multiple-inlet rice irrigation (MIRI), FR, and FR with cereal rye (Secale cereale) and barley (Hordeum vulgare) as preceding winter cover crops (FRCC). CH4 and N2O fluxes were measured from May to September 2019 using a static chamber technique. Grain yield from FR (11.8 Mg ha−1) and MIRI (12.0 Mg ha−1) was similar, and significantly higher than FRCC (8.5 Mg ha−1). FR and FRCC drastically reduced CH4 emissions compared to MIRI. Total seasonal CH4 emissions decreased in the order of 44 > 11 > 3 kg CH4-C ha−1 from MIRI, FR, and FRCC, respectively. Cumulative seasonal N2O emissions were low from MIRI (0.1 kg N2O-N ha−1) but significantly higher from FR (4.4 kg N2O-N ha−1) and FRCC (3.0 kg N2O-N ha−1). However, there was no net difference in global warming potential among FR, FRCC and MIRI. These results suggest that the increased N2O flux from furrow-irrigated rice may not greatly detract from the potential benefits that furrow-irrigation offers rice producers.

Nitrous oxide emissions from denitrification and the partitioning of gaseous losses as affected by nitrate and carbon addition and soil aeration

2008 ◽  
Vol 88 (2) ◽  
pp. 133-143 ◽  
Author(s):  
K M Gillam ◽  
B J Zebarth ◽  
D L Burton
Keyword(s):  
Nitrous Oxide ◽  
Management Practices ◽  
Pore Space ◽  
Red Clover ◽  
Barley Straw ◽  
Nitrous Oxide Emissions ◽  
N Losses ◽  
Terminal Electron Acceptor ◽  
Soil Aeration ◽  
Key Words Denitrification

National inventories of N2O emissions from agricultural situations are being developed; however, the factors controlling such emissions may vary with soil and environmental conditions and management practices. This study determined the relative importance of soil aeration, as measured by water-filled pore space (WFPS), NO3− addition, C addition and C source on the amount and partitioning of gaseous N losses from denitrification from an arable soil in Atlantic Canada. Denitrification (N2O + N2) and N2O emissions were measured on repacked soil cores using acetylene inhibition.The N2O:(N2O + N2) ratio was frequently 0.7 or higher, indicating that most emissions occurred as N2O. N2O emissions and denitrification were negligible at a WFPS of 0.45 m3 m-3, and high at WFPS of 0.75 m3 m-3, regardless of NO3−or C addition treatments. At a WFPS of 0.60 m3 m-3, N2O emissions and denitrification were low and were increased by both NO3− and C addition treatments. Carbon source was investigated by amendment with glucose, red clover or barley straw. Based on the quantity of soil respiration per unit of C added in the amendment, C in the red clover and barley straw was estimated to be 48 and 28% as available as glucose C. When corrected for C availability, cumulative N2O emissions averaged 0.010, 0.011 and 0.002 mg N kg-1 soil, and cumulative denitrification averaged 0.014, 0.014 and 0.003 mg N kg-1 soil, for each 1.0 mg C kg-1 soil of available C added as glucose, red clover or barley straw, respectively. NO3− addition had no effect on denitrification, but increased N2O emissions, especially where C availability was high. The amount of denitrification was controlled primarily by soil O2 supply, as controlled by WFPS and C availability. The N2O:(N2O + N2) ratio was generally high in cases where the supply of O2 or NO3− was sufficient to meet the demand for terminal electron acceptors. Key words: Denitrification, nitrous oxide, glucose, red clover, barley straw, carbon availability, terminal electron acceptor, aeration

scholarly journals Nitrous oxide emissions from grain production systems across a wide range of environmental conditions in eastern Australia

Soil Research ◽  
2016 ◽  
Vol 54 (5) ◽  
pp. 659 ◽  
Author(s):  
Henrike Mielenz ◽  
Peter J. Thorburn ◽  
Robert H. Harris ◽  
Sally J. Officer ◽  
Guangdi Li ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Management Practices ◽  
Crop Yields ◽  
Production Systems ◽  
Nitrous Oxide Emissions ◽  
N2o Emissions ◽  
Climate Conditions ◽  
Eastern Australia ◽  
Wide Range ◽  
Emissions Intensity

Nitrous oxide (N2O) emissions from Australian grain cropping systems are highly variable due to the large variations in soil and climate conditions and management practices under which crops are grown. Agricultural soils contribute 55% of national N2O emissions, and therefore mitigation of these emissions is important. In the present study, we explored N2O emissions, yield and emissions intensity in a range of management practices in grain crops across eastern Australia with the Agricultural Production Systems sIMulator (APSIM). The model was initially evaluated against experiments conducted at six field sites across major grain-growing regions in eastern Australia. Measured yields for all crops used in the experiments (wheat, barley, sorghum, maize, cotton, canola and chickpea) and seasonal N2O emissions were satisfactorily predicted with R2=0.93 and R2=0.91 respectively. As expected, N2O emissions and emissions intensity increased with increasing nitrogen (N) fertiliser input, whereas crop yields increased until a yield plateau was reached at a site- and crop-specific N rate. The mitigation potential of splitting N fertiliser application depended on the climate conditions and was found to be relevant only in the southern grain-growing region, where most rainfall occurs during the cropping season. Growing grain legumes in rotation with cereal crops has great potential to reduce mineral N fertiliser requirements and so N2O emissions. In general, N management strategies that maximise yields and increase N use efficiency showed the greatest promise for N2O mitigation.

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