Effects of long-term nitrogen fertilization on N2O, N2 and their yield-scaled emissions in a temperate semi-arid agro-ecosystem

Bizimana, Fiston; Timilsina, Arbindra; Dong, Wenxu; Uwamungu, Jean Yves; Li, Xiaoxin; Wang, Yuying; Pandey, Bipin; Qin, Shuping; Hu, Chunsheng

doi:10.1007/s11368-021-02903-4

Cited by 24 publications

(11 citation statements)

References 64 publications

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“…The N2O fluxes of all treatments increased rapidly and were all higher than that of CK after the application of urea, and then decreased slowly, indicating that the application of urea could promote the production of N2O, similar to previous studies [27][28][29]. This was mainly due to the rapid increase in soil mineral nitrogen after urea application (Figure 2A,B) [29]. With the increase in urea application, the appearance of the N2O peak was delayed, its intensity increased, and the N2O flux lasted longer (Figure 1).…”

Section: Discussionsupporting

confidence: 89%

“…However, Chen et al [33] believed that when the nitrogen application rate was greater than 900 mg N kg −1 , N2O would not continue to increase due to the limitation of high ammonium concentrations; perhaps the nitrogen application rate in our experiment did not reach such a maximum threshold value. The production of N2O was significantly positively correlated with the content of NH4 + -N and NO3 --N in the soil (Table 2) [19], indicating that ammonia oxidation and denitrification occurred simultaneously in the soil during the incubation period [29]. The significant positive correlation between N2O production and AOA amoA, nirS and nirK in this experiment also supports this point.…”

Section: Discussionsupporting

confidence: 75%

“…The reduction in N2O emissions was more effective when high nitrogen (420 kg N ha −1 ) was combined with a low amount (3000 kg ha −1 ) of residue. This may be because the dissolved organic carbon (DOC) content in the soil increased with an increase in the corn stalk application, which accelerated denitrification [20,29]. This was also indicated by the observation that nirS and nirK genes (the key functional genes for N2O production in the denitrification pathway [4]) were least abundant in the N3S1 treatment (Figure 3C,D).…”

Section: Discussionmentioning

confidence: 77%

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Effects of Corn Stalks and Urea on N2O Production from Corn Field Soil

Zhang

Liu

et al. 2021

Agronomy

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Returning corn stalks to the field is an important and widely used soil management practice which is conducive to the sustainable development of agriculture. In this study, the effects of corn stalks and urea on N2O production in corn field soil were investigated through a 21-day incubation experiment. This study showed that increasing amounts of urea added to soil with a history of corn cultivation leads to increasing overall N2O emissions, by increasing both the intensity and the duration of emissions. Although N2O production was affected primarily by urea-derived NH4+-N and NO3--N, its main source was native soil nitrogen, which accounted for 78.5 to 94.5% of N2O. Returning corn stalk residue to the field reduced the production of N2O, and the more urea was applied, the stronger the effect of corn residue on reducing N2O emissions. Combining the application of corn stalks and urea could reduce the concentration of NH4+-N and NO3--N derived from urea, and then reduce the substrate required for N2O production in nitrification and denitrification processes. In addition, the combined application of corn stalks and urea could effectively inhibit the abundance of key N2O-producing genes AOA amoA, nirS and nirK.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionsupporting

confidence: 75%

Section: Discussionmentioning

confidence: 77%

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Effects of Corn Stalks and Urea on N2O Production from Corn Field Soil

Zhang

Liu

et al. 2021

Agronomy

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“…Similarly, in the case of plant mitochondria, the addition of NADH during hypoxia can increase the NO scavenging rate [ 197 ], suggesting NO is reduced to N 2 O in a similar way to bacterial denitrification. As N 2 O is a potent greenhouse gas that contributes to global warming and ozone depletion [ 177 , 198 , 199 , 200 , 201 ], understanding its formation in plants is essential. Moreover, there exist uncertainties in estimating the global N 2 O budget [ 187 ], which could be due to the fact that sources of N 2 O are not well recognized [ 24 , 187 ].…”

Section: Adverse Effects Of Nitric Oxide and Role Of Nitric Oxide Sca...mentioning

confidence: 99%

Nitrate–Nitrite–Nitric Oxide Pathway: A Mechanism of Hypoxia and Anoxia Tolerance in Plants

Timilsina

Dong

Hasanuzzaman

et al. 2022

IJMS

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Oxygen (O2) is the most crucial substrate for numerous biochemical processes in plants. Its deprivation is a critical factor that affects plant growth and may lead to death if it lasts for a long time. However, various biotic and abiotic factors cause O2 deprivation, leading to hypoxia and anoxia in plant tissues. To survive under hypoxia and/or anoxia, plants deploy various mechanisms such as fermentation paths, reactive oxygen species (ROS), reactive nitrogen species (RNS), antioxidant enzymes, aerenchyma, and adventitious root formation, while nitrate (NO3−), nitrite (NO2−), and nitric oxide (NO) have shown numerous beneficial roles through modulating these mechanisms. Therefore, in this review, we highlight the role of reductive pathways of NO formation which lessen the deleterious effects of oxidative damages and increase the adaptation capacity of plants during hypoxia and anoxia. Meanwhile, the overproduction of NO through reductive pathways during hypoxia and anoxia leads to cellular dysfunction and cell death. Thus, its scavenging or inhibition is equally important for plant survival. As plants are also reported to produce a potent greenhouse gas nitrous oxide (N2O) when supplied with NO3− and NO2−, resembling bacterial denitrification, its role during hypoxia and anoxia tolerance is discussed here. We point out that NO reduction to N2O along with the phytoglobin-NO cycle could be the most important NO-scavenging mechanism that would reduce nitro-oxidative stress, thus enhancing plants’ survival during O2-limited conditions. Hence, understanding the molecular mechanisms involved in reducing NO toxicity would not only provide insight into its role in plant physiology, but also address the uncertainties seen in the global N2O budget.

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“…Increasingly, in studies on the mitigation of N gas losses, emissions are provided as yield-scaled quantities [13,[44][45][46][47][48][49][50]. This makes it possible to compare for systems of different productivity and facilitates the assessment of the effectiveness of various mitigation practices [13].…”

Section: Introductionmentioning

confidence: 99%

Reduction of Nitrogen Losses in Winter Wheat Grown on Light Soils

et al. 2021

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Two 16-year-old series of experiments with winter wheat grown in rotation after winter oilseed rape were used in the study. The experiments were located in the cold temperate dry and moist climate zones on light soils. Wheat was fertilized with nitrogen in the doses of 40, 80, 120, 160, and 200 kg N·ha−1 per year. Through the several years of the experiment, critical N rates for maximum yield and gross margin from the linear-plus plateau regressions were 149 ± 23.9 and 112 ± 23.6 kg N·ha−1, respectively. The estimated nitrogen indicators for these doses were as follows: nitrogen use efficiency (NUE) 93 and 108%, N surplus (Ns) 6.8 and −10.1 kg·N·ha−1, yield-scaled Ns, N2O, and NH3 3.5 and −0.2; 0.35 and 0.30; 0.31 and 0.25 kg N·Mg−1, respectively. Experiments have shown that two strategies for reducing nitrogen losses on light soils under wheat cultivation are possible: by limiting the N dose to the critical values due to the yield requirements, or due to the gross margin. The analysis of the 11-year data for 2300 farm fields with winter wheat grown on light soils showed that only 10% of them were implementing the first strategy, and as much as 90% chose the second strategy.

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Effects of long-term nitrogen fertilization on N2O, N2 and their yield-scaled emissions in a temperate semi-arid agro-ecosystem

Cited by 24 publications

References 64 publications

Effects of Corn Stalks and Urea on N2O Production from Corn Field Soil

Effects of Corn Stalks and Urea on N2O Production from Corn Field Soil

Nitrate–Nitrite–Nitric Oxide Pathway: A Mechanism of Hypoxia and Anoxia Tolerance in Plants

Reduction of Nitrogen Losses in Winter Wheat Grown on Light Soils

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