An international comparison of agricultural nitrous oxide emissions

Maraseni, Tek; Qu, Jianhua

doi:10.1016/j.jclepro.2016.07.035

Cited by 39 publications

(20 citation statements)

References 33 publications

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“…According to Teh [53], nutrient demand in oil palm plantations will increase steeply in the next two to four years, after which it will stabilize to a rather constant level (180 kg N ha −1 ); thus, high soil nutrient levels may not always lead to high nutrient uptake. The annual oil palm yield in this study was negatively correlated (p < 0.05) with annual cumulative N 2 O emissions and NO 3 − , suggesting that increased oil palm yield reduced NO 3 − in soil via N uptake, resulting in lower N 2 O emissions. The effect of plant N uptake on N 2 O emissions was also reported by other studies [54,55].…”

Section: Effect Of N Fertilization On Oil Palm Yieldmentioning

confidence: 58%

“…Nitrous oxide (N 2 O) is one of the most potent greenhouse gases, with 298 times the global warming potential (GWP) of CO 2 over a 100-year timescale [1]. Agricultural soils are responsible for 60-80% of anthropogenic N 2 O sources; mainly derived from synthetic fertilizers, manure applications, and crop residues left on farms [2,3]. The drive to fulfill the global demand for food supply and the scarcity of other suitable lands for agriculture has pushed the expansion of oil palm plantations into lowland tropical peatland.…”

Section: Introductionmentioning

confidence: 99%

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Soil N2O Emissions under Different N Rates in an Oil Palm Plantation on Tropical Peatland

Chaddy

Melling²,

Ishikura

et al. 2019

Agriculture

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(1) Background: Nitrogen (N) fertilization on drained tropical peatland will likely stimulate peat decomposition and mineralization, enhancing N2O emission from the peat soil. (2) Methods: A field experiment was conducted to quantify the N2O emissions from soil in an oil palm plantation (Elaeis guineensis Jacq.) located in a tropical peatland in Sarawak, Malaysia, under different rates of N fertilizers. The study was conducted from January 2010 to December 2013 and resumed from January 2016 to December 2017. Nitrous oxide (N2O) flux was measured every month using a closed chamber method for four different N rates; control—without N (T1), 31.1 kg N ha−1 yr−1 (T2), 62.2 kg N ha−1 yr−1 (T3), and 124.3 kg N ha−1 yr−1 (T4); (3) Results: Application of the N fertilizer significantly increased annual cumulative N2O emissions for T4 only in the years 2010 (p = 0.017), 2011 (p = 0.012), 2012 (p = 0.007), and 2016 (p = 0.048). The highest average annual cumulative N2O emissions were recorded for T4 (41.5 ± 28.7 kg N ha−1 yr−1), followed by T3 (35.1 ± 25.7 kg N ha−1 yr−1), T1 (25.2 ± 17.8 kg N ha−1 yr−1), and T2 (25.1 ± 15.4 kg N ha−1 yr−1), indicating that the N rates of 62.2 kg N ha−1 yr−1 and 124.3 kg N ha−1 yr−1 increased the average annual cumulative N2O emissions by 39% and 65%, respectively, as compared to the control. The N fertilization had no significant effect on annual oil palm yield (p = 0.994). Alternating between low (deeper than −60 cm) and high groundwater level (GWL) (shallower than −60 cm) enhanced nitrification during low GWL, further supplying NO3− for denitrification in the high GWL, and contributing to higher N2O emissions in high GWL. The emissions of N2O ranged from 17 µg N m−2 hr−1 to 2447 µg N m−2 hr−1 and decreased when the water-filled pore space (WFPS) was between 70% and 96%, suggesting the occurrence of complete denitrification. A positive correlation between N2O emissions and NO3− at 70–96% WFPS indicated that denitrification increased with increased NO3− availability. Based on their standardized regression coefficients, the effect of GWL on N2O emissions increased with increased N rate (p < 0.001). Furthermore, it was found that annual oil palm yields negatively correlated with annual N2O emission and NO3− for all treatments. Both nitrification and denitrification increased with increased N availability, making both processes important sources of N2O in oil palm cultivation on tropical peatland.; and (4) Conclusions: To improve understanding of N2O mitigation strategies, further studies should consider plant N uptake on N2O emissions, at least until the completion of the planting.

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Section: Effect Of N Fertilization On Oil Palm Yieldmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Soil N2O Emissions under Different N Rates in an Oil Palm Plantation on Tropical Peatland

Chaddy

Melling²,

Ishikura

et al. 2019

Agriculture

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“…GHG emissions resulting from agricultural production accounted for approximately 11% of the global anthropogenic GHG emissions in 2010 [1,2]. Recently, the GHG emissions from different types of agricultural activities have been estimated in many studies [3][4][5][6]. In China, the application of synthetic nitrogen (N) fertilizers contributed greatly to grain production and food safety.…”

Section: Introductionmentioning

confidence: 99%

Greenhouse gas emissions from synthetic nitrogen manufacture and fertilization for main upland crops in China

Chai

Chao

et al. 2019

Carbon Balance Manage

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Background: A significant source of greenhouse gas (GHG) emissions comes from the manufacture of synthetic nitrogen (N) fertilizers consumed in crop production processes. And the application of synthetic N fertilizers is recognized as the most important factor contributing to direct N 2 O emissions from agricultural soils. Based on statistical data and relevant literature, the GHG emissions associated with synthetic N manufacture and fertilization for wheat and maize in different provinces and agricultural regions of China were quantitatively evaluated in the present study. Results:During the 2015-2017 period, the average application rates of synthetic N for wheat and maize in upland fields of China were 222 and 197 kg ha −1 , respectively. The total consumption of synthetic N on wheat and maize was 12.63 Mt year −1 . At the national scale, the GHG emissions associated with the manufacture of synthetic N fertilizers were estimated to be 41.44 and 59.71 Mt CO 2 -eq year −1 for wheat and maize in China, respectively. And the direct N 2 O emissions derived from synthetic N fertilization were estimated to be 35.82 and 69.44 Gg N 2 O year −1 for wheat and maize, respectively. In the main wheat-cultivating regions of China, area-scaled GHG emissions were higher for Inner Mongolia, Jiangsu and Xinjiang provinces. And for maize, Gansu, Xinjiang, Yunnan, Shannxi and Jiangsu provinces had higher area-scaled GHG emissions. Higher yield-scaled GHG emissions for wheat and maize mainly occured in Yunnan and Gansu provinces. Conclusions:The manufacture and application of synthetic N fertilizers for wheat and maize in Chinese croplands is an important source of agricultural GHG emissions. The current study could provide a scientific basis for establishing an inventory of upland GHG emissions in China and developing appropriate mitigation strategies.

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“…Agriculture accounts for about 5.0e5.8 GtCO 2 e or 10e12% of these emissions (Tubiello et al, 2013;Maraseni and Qu, 2016). These percentages only consider the direct sources.…”

Section: Introductionmentioning

confidence: 99%

An international comparison of rice consumption behaviours and greenhouse gas emissions from rice production

Maraseni

Deo

et al. 2018

Journal of Cleaner Production

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101

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An international comparison of agricultural nitrous oxide emissions

Cited by 39 publications

References 33 publications

Soil N2O Emissions under Different N Rates in an Oil Palm Plantation on Tropical Peatland

Soil N2O Emissions under Different N Rates in an Oil Palm Plantation on Tropical Peatland

Greenhouse gas emissions from synthetic nitrogen manufacture and fertilization for main upland crops in China

An international comparison of rice consumption behaviours and greenhouse gas emissions from rice production

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