Response of soil CH4 fluxes to stimulated nitrogen deposition in a temperate deciduous forest in northern China: A 5-year nitrogen addition experiment

Yang, Xintong; Wang, Chunmei; Xu, Ke

doi:10.1016/j.ejsobi.2017.08.004

Cited by 19 publications

(8 citation statements)

References 45 publications

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“…Soil cumulative N 2 O emissions were calculated by interpolating the N 2 O emissions measured between sampling periods [ 34 ]. Cumulative N 2 O emissions were calculated spanning the time period from March to February next year as follows [ 35 ]: where, F is the N 2 O emissions (μg m –2 h –1 ); i is the sampling number, i.e., samples collected in March had a value of 1 and those collected next February had a value of 12; and t is the sampling time based on the Julian day.…”

Section: Methodsmentioning

confidence: 99%

Five-year study of the effects of simulated nitrogen deposition levels and forms on soil nitrous oxide emissions from a temperate forest in northern China

Wang

Yang

2017

PLoS ONE

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Few studies have quantified the effects of different levels and forms of nitrogen (N) deposition on soil nitrous oxide (N2O) emissions from temperate forest soils. A 5-year field experiment was conducted to investigate the effects of multiple forms and levels of N additions on soil N2O emissions, by using the static closed chamber method at Xi Mountain Experimental Forest Station in northern China. The experiment included a control (no N added), and additions of NH4NO3, NaNO3, and (NH4)2SO4 that each had two levels: 50 kg N ha−1 yr−1 and 150 kg N ha−1 yr−1. All plots were treated to simulate increased N deposition on a monthly schedule during the annual growing season (March to October) and soil N2O emissions were measured monthly from March 2011 to February 2016. Simultaneously, the temperature, moisture, and inorganic N contents of soil were also measured to explore how the main factors may have affected soil N2O emission. The results showed that the types and levels of N addition significantly increased soil inorganic N contents, and the accumulation of soil NO3–-N was significantly higher than that of soil NH4+–N due to N addition. The three N forms significantly increased the average N2O emissions (P < 0.05) in the order of NH4NO3 > (NH4)2SO4 > NaNO3 by 355.95%, 266.35%, and 187.71%, respectively, compared with control. The promotion of N2O emission via the NH4+–N addition was significantly more than that via the NO3––N addition, while N addition at a high level exerted a stronger effect than at the low-level. N addition exerted significantly stronger effects on cumulative N2O emissions in the initial years, especially the third year when the increased cumulative N2O emission reached their maximum. In the later years, the increases persisted but were weakened. Increasing inorganic N concentration could change soil from being N-limited to N-rich, and then N-saturated, and so the promotion on soil available N effect increased and then decreased. Moreover, the soil NH4+–N, NO3–-N, temperature, and water-filled pore space were all positively correlated with soil N2O emissions. These findings suggest that atmospheric N deposition can significantly promote soil N2O emission, and that exogenous NH4+–N and NO3–-N inputs into temperate forests can have synergic effects on soil N2O emission. In future research, both aspects should be better distinguished in the N cycle and balance of terrestrial ecosystems by using 15N tracer methods.

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Section: Methodsmentioning

confidence: 99%

Five-year study of the effects of simulated nitrogen deposition levels and forms on soil nitrous oxide emissions from a temperate forest in northern China

Wang

Yang

2017

PLoS ONE

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“…Second, NH 4 + -N is oxidized to hydroxylamine (NH 2 OH) and nitrite (NO2--N) by CH 4 monooxygenase or ammonia-oxidizing microorganisms, which has a toxic effect on methanotrophs ( Bodelier, 2011 ). Third, the NH 4 + -N and NO 3 – -N content in the N addition treatment were 1.96 and 2.77 times greater than that of the unfertilized treatment, respectively ( Figure 2D ), resulting in osmotic stress and suppressing the activity of methanotrophs ( Bodelier and Laanbroek, 2004 ; Saari et al., 2004 ; Yang et al., 2017 ). Four, the increased AGB could allocate more C to promote root exudates, which would improve substrate availability for methanogens ( Waldo et al., 2019 ).…”

Section: Discussionmentioning

confidence: 98%

“…The N enrichment on land surfaces can both alleviate N limitations and profoundly affect C cycling processes. Previous studies indicate that N addition could increase soil N availability, soil organic carbon, AGB, litter quality, and litter decomposition rates, decrease soil pH and cause acidification, and change the community structure and abundance of soil microbes and the CH 4 release processes they mediated ( Kruger and Frenzel, 2003 ; Treseder, 2008 ; Lu et al., 2014 ; Gong et al., 2015 ; Yang et al., 2017 ; Ji et al., 2019 ; Kong et al., 2019 ; Liu et al., 2021b ). Various meta-analyses suggest that N addition could enhance the release of CH 4 from the soil; in contrast, small amounts of N addition could stimulate CH 4 uptake instead, while larger N addition tends to inhibit CH 4 uptake from the atmosphere to the soil ( Aronson and Helliker, 2010 ; Deng et al., 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Suppression of methane uptake by precipitation pulses and long-term nitrogen addition in a semi-arid meadow steppe in northeast China

Gao

Yang²,

Zhang³

et al. 2023

Front. Plant Sci.

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In the context of global change, the frequency of precipitation pulses is expected to decrease while nitrogen (N) addition is expected to increase, which will have a crucial effect on soil C cycling processes as well as methane (CH4) fluxes. The interactive effects of precipitation pulses and N addition on ecosystem CH4 fluxes, however, remain largely unknown in grassland. In this study, a series of precipitation pulses (0, 5, 10, 20, and 50 mm) and long-term N addition (0 and 10 g N m-2 yr-1, 10 years) was simulated to investigate their effects on CH4 fluxes in a semi-arid grassland. The results showed that large precipitation pulses (10 mm, 20 mm, and 50 mm) had a negative pulsing effect on CH4 fluxes and relatively decreased the peak CH4 fluxes by 203-362% compared with 0 mm precipitation pulse. The large precipitation pulses significantly inhibited CH4 absorption and decreased the cumulative CH4 fluxes by 68-88%, but small precipitation pulses (5 mm) did not significantly alter it. For the first time, we found that precipitation pulse size increased cumulative CH4 fluxes quadratically in both control and N addition treatments. The increased soil moisture caused by precipitation pulses inhibited CH4 absorption by suppressing CH4 uptake and promoting CH4 release. Nitrogen addition significantly decreased the absorption of CH4 by increasing NH4+-N content and NO3–-N content and increased the production of CH4 by increasing aboveground biomass, ultimately suppressing CH4 uptake. Surprisingly, precipitation pulses and N addition did not interact to affect CH4 uptake because precipitation pulses and N addition had an offset effect on pH and affected CH4 fluxes through different pathways. In summary, precipitation pulses and N addition were able to suppress the absorption of CH4 from the atmosphere by soil, reducing the CH4 sink capacity of grassland ecosystems.

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“…For example, in a study, it was observed that small N additions tend to stimulate methane consumption, whereas large additions of N are inhibitory (Peng et al ., 2019). The relation between CH 4 consumption and P was explored in an experiment, where the P content correlated positively with the CH 4 consumption (Yang et al ., 2017).…”

Section: Discussionmentioning

confidence: 99%

Methane consumption potential of soybean-wheat, maize-wheat and maize-gram cropping systems under conventional and no-tillage agriculture in a tropical vertisol

et al. 2020

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Methane (CH4) consumption in agricultural soil is imperative for the mitigation of climate change. However, the effect of tillage and cropping systems on CH4 consumption is less studied. Experiments were carried out in Madhya Pradesh, India with soybean-wheat (SW), maize-wheat (MW) and maize-gram (MG) cropping systems under conventional tillage (CT) and no-tillage (NT). Soybean/maize was cultivated during the kharif season (July–October) and wheat/chickpea in the rabi season (October–March) for 9 years consecutively. Soil samples were collected during vegetative growth stages of soybean and maize from different cropping systems. Methane consumption, the abundance of methanotrophs as particulate methane monooxygenase (pmoA) gene copies, soil and crop parameters were estimated. Methane consumption rate was higher in NT and upper soil layer (0–5 cm) than CT and 5–15 cm depth. Methane consumption rate k ranged from 0.35 to 0.56 μg CH4 consumed/g soil/d in the order of MW>SW>MG in 0–5 cm. The abundance of pmoA gene copies ranged from 43 × 104/g soil to 13 × 104/g soil and was highest in MW-NT and lowest in MG-CT. Available nitrogen, phosphorus and potassium were higher in 0–5 cm than in 5–15 cm depth. Soil and plant parameters and abundance of pmoA genes correlated significantly and positively with CH4 consumption rate. No-tillage stimulated CH4 consumption compared to CT irrespective of cropping system and CH4 consumption potential was highest in MW and lowest in MG. However, the magnitude of the positive effect of NT towards CH4 consumption was higher in SW and MG than MW.

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Response of soil CH4 fluxes to stimulated nitrogen deposition in a temperate deciduous forest in northern China: A 5-year nitrogen addition experiment

Cited by 19 publications

References 45 publications

Five-year study of the effects of simulated nitrogen deposition levels and forms on soil nitrous oxide emissions from a temperate forest in northern China

Five-year study of the effects of simulated nitrogen deposition levels and forms on soil nitrous oxide emissions from a temperate forest in northern China

Suppression of methane uptake by precipitation pulses and long-term nitrogen addition in a semi-arid meadow steppe in northeast China

Methane consumption potential of soybean-wheat, maize-wheat and maize-gram cropping systems under conventional and no-tillage agriculture in a tropical vertisol

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