Nitrous Oxide and Methane Emissions in Spring Maize Field in the Semi‐Arid Regions of Loess Plateau

Jiang, Jingshan; Wang, Rui; Wang, Zhiqi; Guo, Shengli; Ju, Xiaotang

doi:10.1002/clen.201500271

Cited by 6 publications

(3 citation statements)

References 63 publications

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“…However, in our study, increased cumulative N 2 O emissions above the exponential curve according to fertilization N amount increase (Figure 6b) and simulated data according to soil pH increase from 7 to 9 based on global reference data under maize in saline and alkaline soils (Figure 7b). This may be because (i) the soil microorganisms rapidly responded to fertilization (Martins et al, 2015) and (ii) split irrigation was applied in this region, leading to an increase in the frequencies of alternative wetting and drying (Jiang et al, 2017). The saline and alkaline soils in Tarim river basin must face the higher risk of N 2 O emission under unreasonable agricultural land use.…”

Section: Discussionmentioning

confidence: 99%

A balance among irrigation and fertilization regimes to reduce greenhouse gases emissions from saline and alkaline soils

Zhang,

Zamanian,

Raza

et al. 2023

Land Degrad Dev

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Agricultural practices of nitrogen and irrigation overuse bring lots of environmental problems, such as greenhouse gases (GHGs) emissions, soil, and water pollution. With the fast expansion of saline and alkaline agricultural soils in the Tarim River Basin, field practice must be very cautious facing water limitations and global warming. The GHGs were measured 1–2 times weekly and water and fertilizer use efficiency were evaluated under five treatments: (1) fallow (Control); (2) no N (kg N ha−1) and no irrigation (mm) (0N0W); (3) 200 and 355 (LNLW); (4) 230 and 475 (MNMW), and (5) 320 and 655 (HNHW) (traditional treatment) from 2018 to 2019 under maize in Aksu in the Tarim River Basin. The GHGs increased with fertilization and irrigation. The cumulative GHGs were 0.6–5.9 Mg CO2–C ha−1, 0.2–3.6 kg N2O–N ha−1, and increased significantly with biomass increase. The cumulative CH4 was −0.03 to −0.12 kg C ha−1. The MNMW resulted in the highest average water use efficiency (27 kg ha−1 mm−1), irrigation water use efficiency (32 kg ha−1 mm−1), and agronomic N use efficiency (44 kg kg−1), but the lowest greenhouse gas intensity (0.4 kg CO2‐eq ha−1 grain yield). The MNMW reduced the average of 10 mm water, 5 kg N ha−1 fertilizer, and 4 × 10−3 kg CO2‐eq ha−1 GHGI earning 1 t ha−1 maize compared to HNHW. The CO2 emission had a strong relationship with temperature (T) and soil moisture (W) (CO2 emission = (exp (a + bW + cW2)) Q10(T‐20)/10)) (R2 = 0.59–0.92). The lowest was in the LNLW treatment in 2019; the highest was in the HNHW in 2018). The emission of CO2 responding to fertilization was below the global trend, but that of N2O was above under maize in saline and alkaline soils (pH 7–9). In conclusion, MNMW was the best field management to mitigate GHGs with the highest water and fertilizer use efficiency under maize in saline and alkaline soils in Tarim River Basin, where had the higher N2O emission risk.

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Section: Discussionmentioning

confidence: 99%

A balance among irrigation and fertilization regimes to reduce greenhouse gases emissions from saline and alkaline soils

Zhang,

Zamanian,

Raza

et al. 2023

Land Degrad Dev

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“…Australia uses a countryspecific EF of 0.2% for N fertilizer application in rainfed agriculture (Schwenke et al, 2016). The present study conducted in a rainfed area exhibited an EF that was lower than that in irrigated regions, such as North China Plain (0.61-0.77%), probably because of the absence of irrigation and low precipitation (Jiang J. et al, 2017). Previous studies conducted in Northeast China and Loess Plateau, which were under rainfed conditions, indicated that the EF in these regions was similar to that observed in our study site (Chen et al, 2014;Wang et al, 2016), and exhibited a substantial impact on estimating the total national N 2 O emissions inventories from the cropping systems (Cayuela et al, 2017).…”

Section: N 2 O Direct Emission Factorsmentioning

confidence: 54%

Effects of Split Application of Urea on Greenhouse Gas and Ammonia Emissions From a Rainfed Maize Field in Northeast China

Dong

Yang

Sun

et al. 2022

Front. Environ. Sci.

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Split application of nitrogen (N) fertilizers during different crop growth stages to fulfill the crop N requirements reduces soil mineral N concentrations and improves the efficiency of crop N fertilizer use, and can decrease nitrous oxide (N2O) emission from the soil. However, inconsistent results regarding N2O emissions have been reported in rainfed areas. Furthermore, few long-term studies have explained the effects of split N application on soil methane (CH4) flux, thus limiting complete assessment of the effects of split N application on total greenhouse gas (GHG) emissions. Therefore, long-term monitoring is urgently required to understand the impacts of split N application on GHG emissions in rainfed areas. In this study, a 6-year field experiment was conducted in a rainfed maize (Zea mays L.) field in Northeast China. The experiment included three treatments: no N application representing control (CK), single application at the sowing stage of maize (SU), and split N at the sowing and jointing stages at a ratio of 1: 2 (SF). Between the sowing and jointing stages, N2O emissions were significantly higher in SU than in SF. However, high N2O emissions were observed in SF for 1 month after N application at the jointing stage possibly because the time of N application coincided with optimum precipitation and soil temperature conditions, which stimulated N2O emissions. Overall, the total N2O emissions showed no significant difference between SU and SF. During the study period, split application of N fertilizer did not significantly affect the cumulative CH4 flux. Compared to CK, the yield-scaled GWP in SF treatment increased by 18.7% (p < 0.05). Ammonia (NH3) volatilization in SF was 272% higher than that in SU. The findings indicated that split N application exhibited an environmental risk by increasing the yield-scaled GWP and NH3 emissions in the field. Thus, this study suggested that single N application applied in the sowing stage should be employed in rainfed fields to mitigate the yield-scaled GWP and NH3 emissions, and maintain efficient maize yields.

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“…Therefore, only the reductions in GHG fluxes (N 2 O, CH 4 , and CO 2 , mainly) could mitigate climate change. Aerobic soil mainly releases CO 2 and N 2 O under normal climate conditions, but stimulates the reductions of N 2 O and CH 4 productions and even hypoxia in the case of extreme weather (such as heavy rainfall in short term) [ 42 ]. In all, we needed to estimate and compare the magnitudes of the greenhouse gas release between the Miscanthus plantation and other types of vegetation in the region or elsewhere.…”

Section: Discussionmentioning

confidence: 99%

N2O and CH4 emission from Miscanthus energy crop fields in the infertile Loess Plateau of China

Liu

Zhao

et al. 2018

Biotechnol Biofuels

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BackgroundThe greenhouse gas (GHG) mitigation is one of the most important environmental benefits of using bioenergy replacing fossil fuels. Nitrous oxide (N2O) and methane (CH4) are important GHGs and have drawn extra attention for their roles in global warming. Although there have been many works of soil emissions of N2O and CH4 from bioenergy crops in the field scale, GHG emissions in large area of marginal lands are rather sparse and how soil temperature and moisture affect the emission potential remains unknown. Therefore, we sought to estimate the regional GHG emission based on N2O and CH4 releases from the energy crop fields.ResultsHere we sampled the top soils from two Miscanthus fields and incubated them using a short-term laboratory microcosm approach under different conditions of typical soil temperatures and moistures. Based on the emission measurements of N2O and CH4, we developed a model to estimate annual regional GHG emission of Miscanthus production in the infertile Loess Plateau of China. The results showed that the N2O emission potential was 0.27 kg N ha−1 year−1 and clearly lower than that of croplands and grasslands. The CH4 uptake potential was 1.06 kg C ha−1 year−1 and was slightly higher than that of croplands. Integrated with our previous study on the emission of CO2, the net greenhouse effect of three major GHGs (N2O, CH4 and CO2) from Miscanthus fields was 4.08 t CO2eq ha−1 year−1 in the Loess Plateau, which was lower than that of croplands, grasslands and shrub lands.ConclusionsOur study revealed that Miscanthus production may hold a great potential for GHG mitigation in the vast infertile land in the Loess Plateau of China and could contribute to the sustainable energy utilization and have positive environmental impact on the region.Electronic supplementary materialThe online version of this article (10.1186/s13068-018-1320-8) contains supplementary material, which is available to authorized users.

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Nitrous Oxide and Methane Emissions in Spring Maize Field in the Semi‐Arid Regions of Loess Plateau

Cited by 6 publications

References 63 publications

A balance among irrigation and fertilization regimes to reduce greenhouse gases emissions from saline and alkaline soils

A balance among irrigation and fertilization regimes to reduce greenhouse gases emissions from saline and alkaline soils

Effects of Split Application of Urea on Greenhouse Gas and Ammonia Emissions From a Rainfed Maize Field in Northeast China

N2O and CH4 emission from Miscanthus energy crop fields in the infertile Loess Plateau of China

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