Atmospheric dry and bulk nitrogen deposition to forest environment in the North China Plain

Fu, Yongcai; Wang, Wei; Han, Mengjuan; Kuerban, Mireadili; Wang, Chen; Liu, Xuejun

doi:10.1016/j.apr.2019.06.004

Cited by 12 publications

(6 citation statements)

References 43 publications

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“…The deposition velocities used in this study for TN, ON, and NO 3 – was 1.2 cm s –1 and for NH 4 + was 0.6 cm s –1 . These V d for particulate NO 3 – and NH 4 + were much closer to the one used by Fu et al for forest ecosystems in China. Similar deposition velocity for NO 3 – was also applied by Chen and Huang to calculate the deposition flux over the South China Sea.…”

Section: Methodssupporting

confidence: 86%

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Nitrogen Speciation and Isotopic Composition of Aerosols Collected at Himalayan Forest (3326 m a.s.l.): Seasonality, Sources, and Implications

Bhattarai

Zhang

Pavuluri

et al. 2019

Environ. Sci. Technol.

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Nitrogenous aerosols are ubiquitous in the environment and thus play a vital role in the nutrient balance as well as the Earth's climate system. However, their abundance, sources, and deposition are poorly understood, particularly in the fragile and ecosensitive Himalayan and Tibetan Plateau (HTP) region. Here, we report concentrations of nitrogen species and isotopic composition (δ 15 N) in aerosol samples collected from a forest site in the HTP (i.e., Southeast Tibet). Our results revealed that both organic and inorganic nitrogen contribute almost equally with high abundance of ammonium nitrogen (NH 4 + −N) and waterinsoluble organic nitrogen (WION), contributing ∼40% each to aerosol total nitrogen (TN). The concentrations and δ 15 N exhibit a significant seasonality with ∼2 times higher in winter than in summer with no significant diurnal variations for any species. Moreover, winter aerosols mainly originated from biomass burning emissions from North India and East Pakistan and reached the HTP through a long-range atmospheric transport. The TN dry deposition and total deposition fluxes were 2.04 kg ha −1 yr −1 and 6.12 kg ha −1 yr −1 respectively. Our results demonstrate that the air contamination from South Asia reach the HTP and is most likely impacting the high altitude ecosystems in an accepted scenario of increasing emissions over South Asia.

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Section: Methodssupporting

confidence: 86%

“…+ were much closer to the one used by Fu et al 39 for forest ecosystems in China. Similar deposition velocity for NO 3 − was also applied by Chen and Huang 40 to calculate the deposition flux over the South China Sea.…”

Section: ■ Materials and Methodssupporting

confidence: 80%

Nitrogen Speciation and Isotopic Composition of Aerosols Collected at Himalayan Forest (3326 m a.s.l.): Seasonality, Sources, and Implications

Bhattarai

Zhang

Pavuluri

et al. 2019

Environ. Sci. Technol.

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“…Ambient NO 2 is mainly attributed to industrial sources (e.g., fossil fuel burning; automobile exhausts; power plants), and so is highest in the most populated areas [33,34]. Although some research has shown that NO 2 exhibits seasonal variation [29,35] because of fossil fuel burning in winter, there were no NO 2 pollution sources near our site other than the state road (#318), and so NO 2 concentrations showed little seasonal variation. + dominated bulk Nr deposition in forest ecosystems in China, with a mean bulk deposition of 9.4 kg N ha −1 y −1 for NH 4 + -N and 3.9 kg N ha −1 y −1 for NO 3 − -N [36].…”

Section: Variation Of Monthly Bulk Nr Concentrations and Atmospheric ...mentioning

confidence: 70%

“…Dry deposition was calculated as the atmospheric Nr concentration multiplied by the deposition velocity. Monthly atmospheric Nr concentrations were obtained from the measured NH 3 and NO 2 concentrations and deposition velocities in forests from Flechard et al [10]; these have been widely used to estimate Nr deposition in forest environments [29,30]. Deposition velocities of NH 3 and NO 2 were 1.6 cm s −1 and 0.16 cm s −1 , respectively.…”

Section: Calculations and Statistical Analysismentioning

confidence: 99%

Atmospheric Nitrogen Deposition to a Southeast Tibetan Forest Ecosystem

et al. 2020

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With atmospheric reactive nitrogen (Nr) emissions increasing globally, research into Nr deposition has attracted increasing attention, especially in remote environments. These ecosystems are very sensitive to global change, especially enhanced Nr deposition. Forest environments, in particular, are highlighted because of their important ecological function. We quantified atmospheric Nr concentrations and deposition over four years of continuous monitoring in a southeast Tibetan boreal forest ecosystem, an ecosystem in which forest biomass and carbon density are high around the world. Average annual bulk Nr deposition was 3.00 kg N ha−1 y−1, with those of reduced and oxidized species estimated at 1.60 and 1.40 kg N ha−1 y−1, respectively. Bulk deposition of both NH4+ and NO3− were controlled by precipitation amount: both Nr deposition and precipitation were highest in summer and lowest in winter. Dry deposition of NH3 and NO2 were 1.18 and 0.05 kg N ha−1 y−1, respectively. Atmospheric NH3 concentrations were in the range 1.15–3.53 mg N L−1, highest in summer and lowest in winter. In contrast, no clear trend in seasonal NO2 concentrations was observed. Monthly NO2 concentrations were 0.79–1.13 mg N L−1. Total Nr deposition (bulk plus dry) was 4.23 (3.00 + 1.23) kg N ha−1 y−1 in the forest. Reduced nitrogen was the dominant species. In conclusion, Nr deposition was in the range at which forest net productivity and carbon sequestration are sensitive to any variation in nitrogen input, so quantification of Nr deposition should continue and with greater detail.

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“…Interestingly, although no fertilizers were used in the CK treatment, nitrogen leaching of 34.91 kg•ha −1 occurred, which we presumed was due to: (i) nitrogen fertilizer remaining from previous crops, since residual nitrate can move continuously downwards and be lost even if it is not leached during the season of application [11]; (ii) nitrogen deposition, for example, a 3-year study investigated atmospheric deposition of different nitrogen species at 10 sites in Northern China and the results indicated that nitrogen deposition levels in Northern China were high, with an average of 59.8 kg•N•ha −1 •yr −1 [31].…”

Section: Effect Of Fertilization Strategies On Nitrogen Leachingmentioning

confidence: 99%

Effects of Partial Blackwater Substitution on Soil Potential NI-Trogen Leaching in a Summer Maize Field on the North China Plain

Zhang

Hao

Yang

et al. 2021

Life

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In China, promoting harmless blackwater treatment and resource utilization in rural areas is a priority of the “toilet revolution”. Exploring the effects of blackwater application in arid areas on soil nitrogen losses can provide a basis for more effective water and fertilizer management. This study analyzed nitrogen leaching and maize yield under blackwater application in the summer maize season of 2020. A total of 5 treatments were used: no fertilizer, single chemical fertilizer application (CF), single blackwater application (HH), and combined chemical fertilizer and blackwater application ratios of 1:1 (CH1) and 2:1 (CH2). The total nitrogen leached from the fertilization treatments was 53.14–60.95 kg·ha−1 and the leached nitrate nitrogen was 34.10–40.62 kg·ha−1. Nitrate nitrogen accounted for 50–62% of the total leached nitrogen. Compared with blackwater treatments, nitrate nitrogen moved into deeper soil layers (80–100 cm depth) during the CF treatment. Compared with CF, HH significantly reduced the maize yield by 24.39%. The nitrogen surplus of HH was higher than that of other fertilizer treatments. Considering nitrogen leaching, maize yield, and economic benefits, the CH2 treatment presented the optimal results. These findings address knowledge gaps and assist in guiding policy-makers to effectively promote China’s “toilet revolution”.

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Atmospheric dry and bulk nitrogen deposition to forest environment in the North China Plain

Cited by 12 publications

References 43 publications

Nitrogen Speciation and Isotopic Composition of Aerosols Collected at Himalayan Forest (3326 m a.s.l.): Seasonality, Sources, and Implications

Nitrogen Speciation and Isotopic Composition of Aerosols Collected at Himalayan Forest (3326 m a.s.l.): Seasonality, Sources, and Implications

Atmospheric Nitrogen Deposition to a Southeast Tibetan Forest Ecosystem

Effects of Partial Blackwater Substitution on Soil Potential NI-Trogen Leaching in a Summer Maize Field on the North China Plain

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