Stimulated or Inhibited Response of Methane Flux to Nitrogen Addition Depends on Nitrogen Levels

Chang, Ruiying; Liu, Xinyu; Wang, Tao; Li, Na; Bing, Haijian

doi:10.1029/2021jg006600

Cited by 15 publications

(3 citation statements)

References 33 publications

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“…However, the methane uptake flux showed a negative exponential relationship with the inorganic nitrogen content. Our observation results support the conclusion of Peng et al [43], Aronso and Helliker [44] and Chang et al [45], who found that high inorganic nitrogen inhibited methane uptake in forest and non-paddy soils. We aimed to decrease the GWP and GHGI by optimizing the fertilization depth.…”

Section: Deep Fertilization Enhanced Soil Ch 4 Uptake and Decreased G...supporting

confidence: 92%

Influence of the Depth of Nitrogen-Phosphorus Fertilizer Placement in Soil on Maize Yielding and Carbon Footprint in the Loess Plateau of China

Huang,

Wu,

Liu

et al. 2024

Agronomy

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Deep fertilization is a beneficial approach for reducing nitrogen losses. However, the effects of various fertilization depths on maize (Zea mays L.) productivity and environmental footprints have not been thoroughly understood. Therefore, a field experiment was conducted to investigate the effects of different fertilization depths of 5 cm (D5), 15 cm (D15), 25 cm (D25), and 35 cm (D35) on maize productivity and environmental footprints. Reactive nitrogen (Nr) losses and greenhouse gas (GHG) emissions were assessed using life cycle analysis. We hypothesized that deep fertilization can obtain lower carbon and nitrogen footprint. The results indicated that deep fertilization decreased the N2O and NH3 emissions while increasing the CH4 uptake. Compared with D5, D15 resulted in an increase in total GHG emissions and carbon footprint (CF), whereas D25 decreased by 13.0% and 23.6%, respectively. Compared with D5, the Nr losses under D15, D25, and D35 conditions was reduced by 11.3%, 17.3%, and 21.0%, respectively, and the nitrogen footprint (NF) was reduced by 16.0%, 27.4%, and 19.0%, respectively. The maize yield under D15 and D25 increased by 5.7% and 13.8%, respectively, compared with the D5 treatment, and the net economic benefits of the ecosystem increased by 7.1% and 17.1%, respectively. In summary, applying fertilizer at a depth of 25 cm can significantly reduce the environmental footprints and increase maize productivity, making it an effective fertilization strategy in the Loess Plateau region of China.

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Section: Deep Fertilization Enhanced Soil Ch 4 Uptake and Decreased G...supporting

confidence: 92%

Influence of the Depth of Nitrogen-Phosphorus Fertilizer Placement in Soil on Maize Yielding and Carbon Footprint in the Loess Plateau of China

Huang,

Wu,

Liu

et al. 2024

Agronomy

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“…This lack of understanding hinders the development of quantitative models and assessment of the change in global forest soil CH 4 budget caused by N deposition. The response of soil CH 4 flux to N deposition is influenced by the rate and persistence of N input and the N availability in forests (Aronson & Helliker, 2010;Chang et al, 2021). In Nlimited forests, a low N input rate can stimulate plant and microbial activities.…”

Section: Introductionmentioning

confidence: 99%

Suppression of nitrogen deposition on global forest soil CH4 uptake depends on nitrogen status

Cen,

He,

et al. 2024

Preprint

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Methane (CH4) is the second most important atmospheric greenhouse gas (GHG) and forest soils are a significant sink for atmospheric CH4. Uptake of CH4 by global forest soils is affected by nitrogen (N) deposition; clarifying the effect of N deposition helps to reduce uncertainties of the global CH4 budget. However, it remains an unsolved puzzle why N input stimulates soil CH4 flux (RCH4) in some forests while suppressing it in others. Combining previous findings and data from N addition experiments conducted in global forests, we proposed and tested a “stimulating-suppressing-weakening effect” (“three stages”) hypothesis on the changing responses of RCH4 to N input. Specifically, we calculated the response factors (f) of RCH4 to N input for N-limited and N-saturated forests across biomes; the significant changes in f values supported our hypothesis. We also estimated the global forest soil CH4 uptake budget to be approximately 11.2 Tg yr–1. CH4 uptake hotspots were located predominantly in temperate forests. Furthermore, we quantified that current level of N deposition reduced global forest soil CH4 uptake by ~3%. This suppression effect was more pronounced in temperate forests than in tropical or boreal forests, likely due to differences in N status. The proposed “three stages” hypothesis in this study generalizes the diverse effects of N input on RCH4, which could help improve experimental design. Additionally, our findings imply that by regulating N pollution and reducing N deposition, soil CH4 uptake can be significantly increased in the N-saturated forests in tropical and temperate biomes.

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“…The response of soil CH 4 flux to N deposition is influenced by the rate and persistence of N input and the N availability in forests (Aronson & Helliker, 2010; Chang et al., 2021). In N‐limited forests, a low N input rate can stimulate plant and microbial activities.…”

Section: Introductionmentioning

confidence: 99%

Suppression of Nitrogen Deposition on Global Forest Soil CH₄ Uptake Depends on Nitrogen Status

Cen,

He,

et al. 2024

Global Biogeochemical Cycles

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Methane (CH4) is the second most important atmospheric greenhouse gas (GHG) and forest soils are a significant sink for atmospheric CH4. Uptake of CH4 by global forest soils is affected by nitrogen (N) deposition; clarifying the effect of N deposition helps to reduce uncertainties of the global CH4 budget. However, it remains an unsolved puzzle why N input stimulates soil CH4 uptake in some forests while suppressing it in others. Combining previous findings and data from N addition experiments conducted in global forests, we proposed and tested a “stimulating‐suppressing‐weakened effect” (“three stages”) hypothesis on the changing responses of soil CH4 flux (RCH4) to N input. Specifically, we calculated the response factors (f) of RCH4 to N input for N‐limited and N‐saturated forests across biomes; the phased changes in f values supported our hypothesis. We also estimated the global forest soil CH4 uptake budget to be approximately 11.2 Tg yr−1. CH4 uptake hotspots were predominantly located in temperate forests. Furthermore, we quantified that the current level of N deposition reduced global forest soil CH4 uptake by ∼3%. This suppression effect was more pronounced in temperate forests than in tropical or boreal forests, likely due to differences in N status. The proposed “three stages” hypothesis in this study generalizes the diverse effects of N input on RCH4, which could help improve experimental design. Additionally, our findings imply that by regulating N pollution and reducing N deposition, soil CH4 uptake can be significantly increased in the N‐saturated forests in tropical and temperate biomes.

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Stimulated or Inhibited Response of Methane Flux to Nitrogen Addition Depends on Nitrogen Levels

Cited by 15 publications

References 33 publications

Influence of the Depth of Nitrogen-Phosphorus Fertilizer Placement in Soil on Maize Yielding and Carbon Footprint in the Loess Plateau of China

Influence of the Depth of Nitrogen-Phosphorus Fertilizer Placement in Soil on Maize Yielding and Carbon Footprint in the Loess Plateau of China

Suppression of nitrogen deposition on global forest soil CH4 uptake depends on nitrogen status

Suppression of Nitrogen Deposition on Global Forest Soil CH₄ Uptake Depends on Nitrogen Status

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Stimulated or Inhibited Response of Methane Flux to Nitrogen Addition Depends on Nitrogen Levels

Cited by 15 publications

References 33 publications

Influence of the Depth of Nitrogen-Phosphorus Fertilizer Placement in Soil on Maize Yielding and Carbon Footprint in the Loess Plateau of China

Influence of the Depth of Nitrogen-Phosphorus Fertilizer Placement in Soil on Maize Yielding and Carbon Footprint in the Loess Plateau of China

Suppression of nitrogen deposition on global forest soil CH4 uptake depends on nitrogen status

Suppression of Nitrogen Deposition on Global Forest Soil CH4 Uptake Depends on Nitrogen Status

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Suppression of Nitrogen Deposition on Global Forest Soil CH₄ Uptake Depends on Nitrogen Status