A simple and easy method to measure ammonia volatilization: Accuracy under field conditions

Martins, Moisés Rodrigues; Sarkis, Leonardo Fernandes; Guareschi, Roni Fernandes; Santos, Camila Almeida dos; Sant'Anna, Selenobaldo Alexinaldo Cabral; Zaman, Mohammad; Jantalia, Cláudia Pozzi; Alves, B. J. R.; Boddey, Robert M.; Araújo, Ednaldo da Silva; Urquiaga, Segundo

doi:10.1016/s1002-0160(20)60077-7

Cited by 14 publications

(10 citation statements)

References 33 publications

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“…This strategy can increase the capacity of the detection of significant NH 3 -N loss abatement by adequate N management practices. In a field plot experiment, Martins et al (2021a) estimated that, by using five chambers per plot (31 m 2 ), the margin of error was less than 15% of the real NH 3 -N loss. To optimise the fieldwork and the laboratory analyses, the use of multiple chambers per plot can be employed only in the critical periods of emissions, i.e.…”

Section: A Simple Low-cost Chamber To Quantify Nh 3 Volatilisationmentioning

confidence: 99%

Methodology for Measuring Greenhouse Gas Emissions from Agricultural Soils Using Non-isotopic Techniques

Zaman

Kleineidam

Bakken

et al. 2021

Measuring Emission of Agricultural Greenhouse Gases and Developing Mitigation Options Using Nuclear and Related Techniques

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Several approaches exist for measuring greenhouse gases (GHGs), mainly CO2, N2O, and CH4, from soil surfaces. The principle methods that are used to measure GHG from agricultural sites are chamber-based techniques. Both open and closed chamber techniques are in use; however, the majority of field applications use closed chambers. The advantages and disadvantages of different chamber techniques and the principal steps of operation are described. An important part of determining the quality of the flux measurements is the storage and the transportation of the gas samples from the field to the laboratory where the analyses are carried out. Traditionally, analyses of GHGs are carried out via gas chromatographs (GCs). In recent years, optical analysers are becoming increasingly available; these are user-friendly machines and they provide a cost-effective alternative to GCs. Another technique which is still under development, but provides a potentially superior method, is Raman spectroscopy. Not only the GHGs, but also N2, can potentially be analysed if the precision of these techniques is increased in future development. An important part of this chapter deals with the analyses of the gas concentrations, the calculation of fluxes, and the required safety measures. Since non-upland agricultural lands (i.e. flooded paddy soils) are steadily increasing, a section is devoted to the specificities of GHG measurements in these ecosystems. Specialised techniques are also required for GHG measurements in aquatic systems (i.e. rivers), which are often affected by the transfer of nutrients from agricultural fields and therefore are an important indirect source of emission of GHGs. A simple, robust, and more precise methodof ammonia (NH3) emission measurement is also described.

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Section: A Simple Low-cost Chamber To Quantify Nh 3 Volatilisationmentioning

confidence: 99%

Methodology for Measuring Greenhouse Gas Emissions from Agricultural Soils Using Non-isotopic Techniques

Zaman

Kleineidam

Bakken

et al. 2021

Measuring Emission of Agricultural Greenhouse Gases and Developing Mitigation Options Using Nuclear and Related Techniques

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“…This study found that over the deployment period, the chamber captured 7.1% of the NH 3 emissions. Similarly, Martins et al (2021) used a 15 N mass balance approach with soil sampling and lysimeters to determine the efficiency of a similar semi-open chamber design. In this study, the semiopen chamber captured 60% of emitted NH 3 .…”

Section: Core Ideasmentioning

confidence: 99%

“…From these studies, we determine that control over the NH 3 source is an important factor for efficient chamber calibration. Whereas Shigaki and Dell (2015) and Martins et al (2021) chose an uncontrolled NH 3 source and intensive environmental sampling to estimate true NH 3 flux, Yang et al (2019) had success with a simple and low-cost experimental design to calibrate a closed chamber. This study sought to expand upon this method to test the performance of four NH 3 chamber designs.…”

Section: Core Ideasmentioning

confidence: 99%

“…This design (Figure 2) is based on and modified from (Araújo et al, 2009;Martins et al, 2021;Shigaki & Dell, 2015). A 25-mm-wide, 3-mm-thick, and 200-mm-long polyurethane foam strip was saturated with 1 M H 2 SO 4 solution, rinsed with H 2 O, wrung out to remove as much water as possible, and oven dried at 35˚C for 24 h. The washed foam strip was placed into a 125-ml bottle that contained a 20-ml solution of 1 M H 2 SO 4 and 4% (v/v) glycerol.…”

Section: Semi-open Chambermentioning

confidence: 99%

“…Whereas Shigaki and Dell (2015) and Martins et al. (2021) chose an uncontrolled NH 3 source and intensive environmental sampling to estimate true NH 3 flux, Yang et al. (2019) had success with a simple and low‐cost experimental design to calibrate a closed chamber.…”

Section: Introductionmentioning

confidence: 99%

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Capture efficiency of four chamber designs for measuring ammonia emissions

Alexander

Spackman

Wilson

et al. 2021

Agrosystems Geosci & Env

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Ammonia (NH 3 ) emissions are an economically and environmentally significant loss pathway of fertilizer and soil-derived N. Chambers are a commonly used method to quantify NH 3 emissions in plot-scale agricultural research. Although this method is widely used, its accuracy may be influenced by the overall design of the chamber, its components, and its interaction with the environment. Four NH 3 chamber designs, including open, open + polytetrafluoroethylene (PTFE), semi-open, and closed, were deployed over a dilute NH 3 solution for 6 h on four dates to determine the effect of chamber design on NH 3 capture efficiency. The solution volume and concentration were measured before and after acid trap deployment, and total volatile NH 3 emission was assumed to be equal to the mass N loss. The NH 3 capture efficiency relative to the estimated total emissions was greatest for the open design (12.9%), whereas the semi-open chamber was the least efficient (3.5%). The closed chamber reduced NH 3 emissions relative to the open and semi-open designs by inhibiting convective gas transport beneath the chamber footprint.

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Emissions of N2O and NH3 from cattle excreta in grass pastures fertilized with N or mixed with a forage legume

Guimarães

Gomes

Homem

et al. 2022

Nutr Cycl Agroecosyst

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A simple and easy method to measure ammonia volatilization: Accuracy under field conditions

Cited by 14 publications

References 33 publications

Methodology for Measuring Greenhouse Gas Emissions from Agricultural Soils Using Non-isotopic Techniques

Methodology for Measuring Greenhouse Gas Emissions from Agricultural Soils Using Non-isotopic Techniques

Capture efficiency of four chamber designs for measuring ammonia emissions

Emissions of N2O and NH3 from cattle excreta in grass pastures fertilized with N or mixed with a forage legume

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