Application of stable isotope techniques in studies of carbon and nitrogen biogeochemical cycles of ecosystem

Sun, Zhigao; Mou, Xiaojie; Li, Xinhua; Wang, Lingling; Song, Huimin; Jiang, Huanhuan

doi:10.1007/s11769-011-0453-5

Cited by 15 publications

(7 citation statements)

References 115 publications

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“…The approach may also serve as a valuable tool to understand N transformation processes (Sun et al 2011). This approach has been successfully applied during the past several decades to streams and rivers (Mayer et al 2002;Kaushal et al 2011;Ma et al 2015), groundwater (Li et al 2007; Barnes and Raymond 2010;Jin et al 2015), and coastal and estuarine systems (Wankel et al 2009;Korth et al 2013Korth et al , 2014Wong et al 2015).…”

Section: Introductionmentioning

confidence: 99%

A stable isotope approach and its application for identifying nitrate source and transformation process in water

Kang

Sun

2015

Environ Sci Pollut Res

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Nitrate contamination of water is a worldwide environmental problem. Recent studies have demonstrated that the nitrogen (N) and oxygen (O) isotopes of nitrate (NO3(-)) can be used to trace nitrogen dynamics including identifying nitrate sources and nitrogen transformation processes. This paper analyzes the current state of identifying nitrate sources and nitrogen transformation processes using N and O isotopes of nitrate. With regard to nitrate sources, δ(15)N-NO3(-) and δ(18)O-NO3(-) values typically vary between sources, allowing the sources to be isotopically fingerprinted. δ(15)N-NO3(-) is often effective at tracing NO(-)3 sources from areas with different land use. δ(18)O-NO3(-) is more useful to identify NO3(-) from atmospheric sources. Isotopic data can be combined with statistical mixing models to quantify the relative contributions of NO3(-) from multiple delineated sources. With regard to N transformation processes, N and O isotopes of nitrate can be used to decipher the degree of nitrogen transformation by such processes as nitrification, assimilation, and denitrification. In some cases, however, isotopic fractionation may alter the isotopic fingerprint associated with the delineated NO3(-) source(s). This problem may be addressed by combining the N and O isotopic data with other types of, including the concentration of selected conservative elements, e.g., chloride (Cl(-)), boron isotope (δ(11)B), and sulfur isotope (δ(35)S) data. Future studies should focus on improving stable isotope mixing models and furthering our understanding of isotopic fractionation by conducting laboratory and field experiments in different environments.

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Section: Introductionmentioning

confidence: 99%

A stable isotope approach and its application for identifying nitrate source and transformation process in water

Kang

Sun

2015

Environ Sci Pollut Res

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“…The rates and contents of nitrogen derived from fertilizer (N dff ) in water, plant and soil were calculated by Eqs. 4-9, respectively [29,33,37]. The nitrogen fertilizer efficiency was acquired by Eq.…”

Section: Data Processing and Statistical Analysesmentioning

confidence: 99%

Tracking the Fate of Fertilizer Nitrogen in a Paddy Rice Field Using Isotope Technology

Yu¹,

Xu²,

Zhu³

et al. 2019

Pol. J. Environ. Stud.

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The aim of this study was to track the fate of nitrogen derived from fertilizer (N dff) after fertilization. A field in situ experiment covering an entire growing season by using 15 N-doubly-labelled urea as fertilizer was conducted at a paddy field inSanjiang Plain in northeastern China. Results showed that approximately 70% of total nitrogen (TN) output load was from N dff , and the lateral seepage contributed ~47% and ~40% of TN and N dff output loads, and the rest of the TN and N dff output loads were derived from runoff and artificial drainage. The N dff contents in paddy root, stalk, foliage and kernel increased with increasing fertilization dosages-from the tillering stage to mature stage. N dff accumulated in the root, stalk and foliage during tillering and the milk stage migrated to the kernel in the mature stage. Most of the residual N dff in soil was distributed in the top layer (0-10 cm). Crop utilization and gaseous loss were the main fates of N dff in the paddy field. The proportion of crop utilization with an average value of ~37% increased from 30.29% to 43.52% with increasing fertilization dosages, while the proportion of gaseous loss decreased from 49.61% to 32.74% with increasing fertilization dosages. 180 kg N hm-2 was the optimum fertilization dosage for crop utilization rate and non-point source pollution control in the rice-growing area of Sanjiang Plain.

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“…O carbono e o nitrogênio estão entre os elementos mais importantes da biosfera terrestre juntamente com o hidrogênio, oxigênio e enxofre (Sun et al,, 2011). O C está presente em todas as moléculas orgânicas e o N é um nutriente limitante para a produção primária determinando o crescimento das plantas, do fitoplâncton e das algas, portanto a quantidade de N disponível no ambiente e as variações do estoque de NT fixado, assim como o C tem implicações importantes no ciclo biogeoquímico global ao longo da história do planeta (Philben et al,, 2016;Robinson et al,, 2012).…”

Section: Composição Elementar Da Matéria Orgânica E Isótopos Estáveisunclassified

“…O tipo de vegetação predominante nos ambientes de determinando ecossistema alteram o fracionamento isotópico (Ometto et al,, 2002) proporcionando a identificação das fontes da matéria orgânica. A fotossíntese e a respiração celular são as principais reações responsáveis pelo fracionamento do C enquanto a síntese de nutrientes é a principal responsável pelo fracionamento do N (Wada et al,1987;Ometto et al,, 2002;Sun et al,, 2011).…”

Section: Composição Elementar Da Matéria Orgânica E Isótopos Estáveisunclassified

“…O ciclo do nitrogênio apresenta processos internos como a assimilação e a nitrificação, e processos externos como a fixação e a desnitrificação / amonificação (Robinson et al,, 2012) e esses processos determinam os teores do δ 15 N no ambiente. O N2 atmosférico apresenta uma composição isotópica bem misturada, portanto seu teor de δ 15 N é em torno de 0 ‰ (Peters et al,, 1978;Meyers, 1997;Sun et al,, 2011).…”

Section: Composição Elementar Da Matéria Orgânica E Isótopos Estáveisunclassified

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Histórico da introdução de matéria orgânica no estuário amazônico do Caeté, Pará

Corrêa¹

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This investigation aimed to observe the variability and predominance of different organic matter sources: biosynthetic, diagenetic, petrogenic and pyrolytic in an Amazonic region, considered the largest tropical forest with the greatest biodiversity reservoir. An evaluation of the possible anthropic or natural alterations using a multiple proxies approach (elementary ratios and stable isotopes of carbon and nitrogen, aliphatic and aromatic hydrocarbons) was observed in two sedimentary cores collected at Bragantina Zone, one of the most impacted deforestation areas of Amazon. The sedimentary organic matter sources indicated the predominance of terrigenous sources. However, the variability of studied parameters exhibited either an anthropogenic or/and natural variation. Between 1932 and 1979, COT and NT data showed an organic matter increase that was related to terrigenous plants sources (C / N, δ 13 C, δ 15 N). The HAs were associated with higher plants increase and HPAs indicated combustion sources coming from the deforestation on the region during the Amazon rubber booms and the agriculture soil preparation. HPAs were related to organic matters sources due to biosynthesis and recent diagenetic of terrigenous organic matter.

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Application of stable isotope techniques in studies of carbon and nitrogen biogeochemical cycles of ecosystem

Cited by 15 publications

References 115 publications

A stable isotope approach and its application for identifying nitrate source and transformation process in water

A stable isotope approach and its application for identifying nitrate source and transformation process in water

Tracking the Fate of Fertilizer Nitrogen in a Paddy Rice Field Using Isotope Technology

Histórico da introdução de matéria orgânica no estuário amazônico do Caeté, Pará

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