Sprinkler Irrigation Is Effective in Reducing Nitrous Oxide Emissions from a Potato Field in an Arid Region: A Two-Year Field Experiment

Wu, Yang; Yuehu, Kang; Feng, Zhiwen; Gu, Ping; Wen, Huang; Liu, Lijia; Yongqin, Jia

doi:10.3390/atmos10050242

Cited by 9 publications

(5 citation statements)

References 36 publications

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“…Aside from lowered irrigation rate as a cause for decreased N 2 O emissions [68,81]; decrease in N 2 O emissions can also be caused by soil aeration [84], though aeration effects on N 2 O production is highly dependent on soil moisture content [96], where microbial nitrification is then water-limited under arid conditions instead of O 2 -limited. Finally, water delivery was recently demonstrated to also contribute to differences in N 2 O emissions from irrigated fields [97]. By comparing flood irrigation to sprinkler and drip irrigation, researchers determined that the hydrologic forms (irrigation or flooding frequency, timing, and duration) will cause contrasting GHG emission patterns [98].…”

Section: N 2 O Emissions and Irrigation Treatmentsmentioning

confidence: 99%

Irrigation and Greenhouse Gas Emissions: A Review of Field-Based Studies

et al. 2020

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Irrigation practices can greatly influence greenhouse gas (GHG) emissions because of their control on soil microbial activity and substrate supply. However, the effects of different irrigation management practices, such as flood irrigations versus reduced volume methods, including drip and sprinkler irrigation, on GHG emissions are still poorly understood. Therefore, this review was performed to investigate the effects of different irrigation management strategies on the emission of nitrous oxide (N2O), carbon dioxide (CO2), and methane (CH4) by synthesizing existing research that either directly or indirectly examined the effects of at least two irrigation rates on GHG emissions within a single field-based study. Out of thirty-two articles selected for review, reduced irrigation was found to be effective in lowering the rate of CH4 emissions, while flood irrigation had the highest CH4 emission. The rate of CO2 emission increased mostly under low irrigation, and the effect of irrigation strategies on N2O emissions were inconsistent, though a majority of studies reported low N2O emissions in continuously flooded field treatments. The global warming potential (GWP) demonstrated that reduced or water-saving irrigation strategies have the potential to decrease the effect of GHG emissions. In general, GWP was higher for the field that was continuously flooded. The major finding from this review is that optimizing irrigation may help to reduce CH4 emissions and net GWP. However, more field research assessing the effect of varying rates of irrigation on the emission of GHGs from the agricultural field is warranted.

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Section: N 2 O Emissions and Irrigation Treatmentsmentioning

confidence: 99%

Irrigation and Greenhouse Gas Emissions: A Review of Field-Based Studies

et al. 2020

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“…Due to the soil moisture status during summer months, N 2 O emissions in our experiment could thus be compared to studies where crops are irrigated. For example, Yang et al (2019) and Wang et al (2016) found that overhead sprinkler irrigation or surface drip irrigation, respectively, relative to flood irrigation, significantly reduced N 2 O emissions, which primarily wetted the soil surface and did not fill soil macropores in lower soil depths.…”

Section: Drought Obscured Treatment Effect On Ghg Emissionsmentioning

confidence: 99%

Lysimeter deep N fertilizer placement reduced leaching and improved N use efficiency

Rychel

Meurer

Getahun

et al. 2023

Nutr Cycl Agroecosyst

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Deep fertilization has been tested widely for nitrogen (N) use efficiency but there is little evidence of its impact on N leaching and the interplay between climate factors and crop N use. In this study, we tested the effect of three fertilizer N placements on leaching, crop growth, and greenhouse gas (GHG) emissions in a lysimeter experiment over three consecutive years with spring-sown cereals (S1, S2, and S3). Leaching was additionally monitored in an 11-month fallow period (F1) preceding S1 and a 15-month fallow period (F2) following S3. In addition to a control with no N fertilizer (Control), 100 kg N ha−1 year−1 of ammonium nitrate was placed at 0.2 m (Deep), 0.07 m (Shallow), or halved between 0.07 m and 0.2 m (Mixed). Deep reduced leachate amount in each cropping period, with significant reductions (p < 0.05) in the drought year (S2) and cumulatively for S1-S3. Overall, Deep reduced leaching by 22, 25 and 34% compared to Shallow, Mixed and Control, respectively. Deep and Mixed reduced N leaching across S1-S3 compared with Shallow, but Deep further reduced N loads by 15% compared to Mixed and was significantly lowest (p < 0.05) among the fertilized treatments in S1 and S2. In S3, Deep increased grain yields by 28 and 22% compared to Shallow and Mixed, respectively, while nearly doubling the agronomic efficiency of N (AEN) and the recovery efficiency of N (REN). Deep N placement is a promising mitigation practice that should be further investigated.

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“…The surface layer in a field irrigated by sprinkler irrigation (SI) is relatively loose compared to FI. Therefore, in such soils, the NO 3 -N and NH 4 -N ions are less leached and remain more concentrated in the root zone [ 106 , 107 ], which makes them more easily absorbed by plant roots and, therefore, less prone to be turned into N 2 O [ 107 , 108 ]. SI is a water-saving approach, and soil conditions during SI, as well as drip irrigation (DI), favor NF in both cases.…”

Section: Management Options To Mitigate N 2 O Emis...mentioning

confidence: 99%

Management Strategies to Mitigate N2O Emissions in Agriculture

Hassan

Aamer

Mahmood

et al. 2022

Life

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The concentration of greenhouse gases (GHGs) in the atmosphere has been increasing since the beginning of the industrial revolution. Nitrous oxide (N2O) is one of the mightiest GHGs, and agriculture is one of the main sources of N2O emissions. In this paper, we reviewed the mechanisms triggering N2O emissions and the role of agricultural practices in their mitigation. The amount of N2O produced from the soil through the combined processes of nitrification and denitrification is profoundly influenced by temperature, moisture, carbon, nitrogen and oxygen contents. These factors can be manipulated to a significant extent through field management practices, influencing N2O emission. The relationships between N2O occurrence and factors regulating it are an important premise for devising mitigation strategies. Here, we evaluated various options in the literature and found that N2O emissions can be effectively reduced by intervening on time and through the method of N supply (30–40%, with peaks up to 80%), tillage and irrigation practices (both in non-univocal way), use of amendments, such as biochar and lime (up to 80%), use of slow-release fertilizers and/or nitrification inhibitors (up to 50%), plant treatment with arbuscular mycorrhizal fungi (up to 75%), appropriate crop rotations and schemes (up to 50%), and integrated nutrient management (in a non-univocal way). In conclusion, acting on N supply (fertilizer type, dose, time, method, etc.) is the most straightforward way to achieve significant N2O reductions without compromising crop yields. However, tuning the rest of crop management (tillage, irrigation, rotation, etc.) to principles of good agricultural practices is also advisable, as it can fetch significant N2O abatement vs. the risk of unexpected rise, which can be incurred by unwary management.

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Sprinkler Irrigation Is Effective in Reducing Nitrous Oxide Emissions from a Potato Field in an Arid Region: A Two-Year Field Experiment

Cited by 9 publications

References 36 publications

Irrigation and Greenhouse Gas Emissions: A Review of Field-Based Studies

Irrigation and Greenhouse Gas Emissions: A Review of Field-Based Studies

Lysimeter deep N fertilizer placement reduced leaching and improved N use efficiency

Management Strategies to Mitigate N2O Emissions in Agriculture

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