Static Chamber Measurements of Ammonia Volatilization from Manured Soils: Impact of Deployment Duration and Manure Characteristics

Miola, Ezequiel César Carvalho; Aita, Celso; Rochette, Philippe; Chantigny, Martin H.; Angers, Denis A.; Bertrand, Normand; Gasser, Marc‐Olivier

doi:10.2136/sssaj2014.07.0305

Cited by 32 publications

(21 citation statements)

References 51 publications

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“…This assumes all extracted [NH 4 + ] represents the amount found in soil pore water that can volatilize into the atmosphere. Recent chamber studies of soil, either of core samples [15] or overtop the intact soil [38,39], overcome this limitation by measuring the NH 3 emission directly. However, enclosure experiments, such as chambers, have difficulty in recreating the turbulent mixing that regulates the transfer velocity between the soil and atmosphere under ambient conditions, which is critical for fluxes that are driven by a compensation point, such as for NH 3 .…”

Section: Challenges Of Measuring Nh 3 In Ecosystem Compartmentsmentioning

confidence: 99%

“…Both dense and open canopy soil NH4 + pools were calculated using the total sampling area (0.98 m 2 ), based on the area of the soil corer, the total mass of soil collected from the top 5 cm, and the extracted [NH4 + ] µg per kg of soil. The range of the Ponderosa pine NH4 + pool was estimated assuming a specific leaf area index (43.8 cm 2 g −1 ), associating leaf surface area with pine needle mass, to express [NH4 + ]bulk ug g −1 in terms of needle surface area [38]. Then by using the leaf area index characterized for the MEFO canopy (LAI = 3) reported by Ortega et al [33], the [NH4 + ]bulk µg cm 2 was converted from leaf surface area to ground surface area.…”

Section: Distribution Of Nh3 Pools In Forest Ecosystemmentioning

confidence: 99%

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Summertime Soil-Atmosphere Ammonia Exchange in the Colorado Rocky Mountain Front Range Pine Forest

et al. 2019

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Understanding the NH3 exchange between forest ecosystems and the atmosphere is important due to its role in the nitrogen cycle. However, NH3 exchange is dynamic and difficult to measure. The goal of this study was to characterize this exchange by measuring the atmosphere, soil, and vegetation. Compensation point modeling was used to evaluate the direction and magnitude of surface-atmosphere exchange. Measurements were performed at the Manitou Experimental Forest Observatory (MEFO) site in the Colorado Front Range by continuous online monitoring of gas and particle phase NH3-NH4+ with an ambient ion monitoring system coupled with ion chromatographs (AIM-IC), direct measurements of [NH4+] and pH in soil extracts to determine ground emission potential (Γg), and measurements of [NH4+]bulk in pine needles to derive leaf emission potential (Γst). Two different soil types were measured multiple times throughout the study, in which Γg ranged from 5 to 2122. Γst values ranged from 29 to 54. Inferred fluxes (Fg) from each soil type predicted intervals of emission and deposition. By accounting for the total [NH4+] pool in each compartment, the lifetime of NH3 with respect to the surface-atmosphere exchange in the soil is on the order of years compared to much faster naturally occurring processes, i.e., mineralization and nitrification.

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Section: Challenges Of Measuring Nh 3 In Ecosystem Compartmentsmentioning

confidence: 99%

Section: Distribution Of Nh3 Pools In Forest Ecosystemmentioning

confidence: 99%

Summertime Soil-Atmosphere Ammonia Exchange in the Colorado Rocky Mountain Front Range Pine Forest

et al. 2019

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“…Since the 1970s, a variety of direct or indirect experimental approaches have been used for the assessment of volatile pollutant flux to the atmosphere. Vapour fluxes can be directly measured at the soil-air interface using static flux chambers (recent examples include Wang et al 2013;Pihlatie et al 2013;Parker et al 2013a;Sihota et al 2013;Collier et al 2014;Gallego et al 2014;Happell et al 2014;Miola et al 2015) or using open or closed dynamic flux chambers (recent examples include Ma et al 2013;Parker et al 2013a;Parker et al 2013b;Sihota et al 2013;Carpi et al 2014;Liu et al 2014;Miola et al 2015). By definition, dynamic flux chambers differ from static flux chambers by the presence of a more or less high forced air flow passing through the measuring device (Hudson and Ayoko 2008).…”

mentioning

confidence: 99%

“…In one of the two dynamic configurations, a carbon trap was used to limit the accumulation of TCE vapour in the chamber headspace. A few studies used flux chambers that limit pollutant vapour accumulation in the headspace (Nômmik 1973;Nay et al 1994;Tillman et al, 2003;Miola et al 2015), but the nonsorbed pollutant part could not be taken into account. In our method of limiting the TCE vapour accumulation in the chamber headspace, the sorbed and nonsorbed pollutant parts were taken into account in vapour flux calculations.…”

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confidence: 99%

Evaluation of VOC fluxes at the soil-air interface using different flux chambers and a quasi-analytical approach

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et al. 2015

Water Air Soil Pollut

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Dense nonaqueous-phase liquids (DNAPLs) spilled on the soil migrate vertically depending upon gravity and capillary forces through the unsaturated zone of the porous aquifer, forming a vapour plume. These volatile organic compounds (VOCs) can be transferred by advection-diffusion to the groundwater or to the atmosphere. Evaluating DNAPL vapour fluxes at the soil-air interface is one of the key challenges in the remediation of contaminated sites. This work discusses the results of a large-scale vapour plume experiment with a well-defined trichloroethylene (TCE) spill, including a sequential raising and lowering of the water table, where the TCE vapour fluxes at the soil surface were experimentally quantified in two ways: (i) directly, with measurements at the soil-air interface using different flux chambers at various operational modes under both transient and steady-state conditions of the vapour plume, and (ii) indirectly, using a quasi-analytical approach based on soil gas measurements. It was shown that upward displacement of the water-air front during the controlled raising of the water table (approximately 10 cm h −1 ) increased the TCE vapour flux measured at the soil surface by factors of 4 to 10. Under steady-state transport conditions, TCE vapour fluxes measured using five types of flux chambers and three operational modes were similar. The effects of the flux chamber geometry, the accumulation of TCE vapours in the chamber headspace or the air recirculation at a low flow rate on the measured TCE vapour fluxes were low. At steady-state transport conditions, TCE vapour fluxes measured with the flux chambers and estimated using the quasianalytical approach were of the same order of magnitude. However, under transient conditions of the vapour plume, the TCE vapour flux predicted by the quasi-analytical approach greatly underestimated or overestimated the real TCE vapour flux at the soil-air interface.

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“…De modo geral, os inibidores de urease influenciaram diretamente as perdas de N- TRIVELIN, 1990;ARAÚJO et al, 2009;MIOLA et al, 2015).…”

Section: Volatilização De Nhunclassified

Eficiência de uso da <sup>15</sup>N-ureia tratada com ácido bórico e sulfato de cobre pelo milho

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Static Chamber Measurements of Ammonia Volatilization from Manured Soils: Impact of Deployment Duration and Manure Characteristics

Cited by 32 publications

References 51 publications

Summertime Soil-Atmosphere Ammonia Exchange in the Colorado Rocky Mountain Front Range Pine Forest

Summertime Soil-Atmosphere Ammonia Exchange in the Colorado Rocky Mountain Front Range Pine Forest

Evaluation of VOC fluxes at the soil-air interface using different flux chambers and a quasi-analytical approach

Eficiência de uso da <sup>15</sup>N-ureia tratada com ácido bórico e sulfato de cobre pelo milho

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