Greenhouse gases fluxes and soil thermal properties in a pasture in central Missouri

Nkongolo, Nsalambi V.; Johnson, Shane; Schmidt, Kent W.; Eivazi, F.

doi:10.1016/s1001-0742(09)60214-x

Cited by 28 publications

(23 citation statements)

References 53 publications

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“…The closed-chamber method was used in the field, even though some disadvantages on the method still exist (Lovanh et al, 2010;Nkongolo et al, 2010). To improve the measuring accuracy of the closed chamber, chamber configuration, headspace mixing, and vent effects on chamber performance were evaluated at the laboratory-scale to optimize design and operation prior to field measurements (Ding et al, 2013(Ding et al, , 2015.…”

Section: Methodsmentioning

confidence: 99%

Greenhouse gas emissions from dairy open lot and manure stockpile in northern China: A case study

Ding

Xie

et al. 2016

Journal of the Air & Waste Management Association

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The open lots and manure stockpiles of dairy farm are major sources of greenhouse gas (GHG) emissions in typical dairy cow housing and manure management system in China. , respectively. In situ storage duration, which estimated by manure volatile solid contents (VS), would affect GHG emissions from stockpiles. Much higher N 2 O was emitted from stockpiles in summer due to longer manure storage.Implications: This study deals with greenhouse gas (GHG) emissions from open lots and stockpiles. It's an increasing area of concern in some livestock producing countries. The Intergovernmental Panel on Climate Change (IPCC) methodology is commonly used for estimation of national GHG emission inventories. There is a shortage of on-farm information to evaluate the accuracy of these equations and default emission factors. This work provides valuable information for improving accounting practices within China or for similar manure management practice in other countries.PAPER HISTORY

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Section: Methodsmentioning

confidence: 99%

Greenhouse gas emissions from dairy open lot and manure stockpile in northern China: A case study

Ding

Xie

et al. 2016

Journal of the Air & Waste Management Association

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“…During gas sampling, the chamber bases were fitted with a removable, opaque, nonreflective, flat PVC cover with a rubber septum port for sampling as well as a port fitted with 4 mm diameter tubing for pressure compensation, as described by Livingston and Hutchinson [1995]. The chambers were sealed with nonreactive vacuum grease (Dow Corning, Inc.), as described by Nkongolo et al [2010]. This vacuum grease sealing method was lab tested, and was found to create an effective seal while having no effect on CH 4 flux rates, comparable with using water as a sealant (unpublished data).…”

Section: Methodsmentioning

confidence: 99%

Methane flux response to nitrogen amendment in an upland pine forest soil and riparian zone

2012

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[1] Methane (CH 4 ) is an important anthropogenic greenhouse gas, up to 15% of which is consumed by terrestrial soils. In this field study of the CH 4 cycle of a pine forest, 18 plots were established at each of two sites, located 40 m apart. The upper site was well-drained and the lower site was poorly drained, but they shared similar overstory tree composition. Nitrogen was added as NH 4 , with greater variance than was observed at the upper site. High N treatments caused greater CH 4 release than the control in the lower, but not the upper, site. The main correlated variable with CH 4 flux was soil moisture; however, it accounted for <14% of the variation. Statistics were run several different ways, resulting in multiple environmental factors contributing up to 84% of the variation in CH 4 flux. Long-term drainage differences between the sites likely drove the differences in CH 4 flux.

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“…Static and vented chambers, 30 cm in height and 20 cm in diameter made of polyvinyl (PVC) were installed in each of the plot for a total of 48 chambers. The apparatus for measuring these gases and the conversion of gas concentrations to fluxes was described in [18].…”

Section: Soil Air Sampling and Co2 Ch4 And N2o Measurementsmentioning

confidence: 99%

Soil Water Potential Control of the Relationship between Moisture and Greenhouse Gas Fluxes in Corn-Soybean Field

Panday

Nkongolo

2015

Climate

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Soil water potential (Ψ) controls the dynamics of water in soils and can therefore affect greenhouse gas fluxes. We examined the relationship between soil moisture content (θ) at five different levels of water potential (Ψ = 0, −0.05, −0.1, −0.33 and −15 bar) and greenhouse gas (carbon dioxide, CO2; nitrous oxide, N2O and methane, CH4) fluxes. The study was conducted in 2011 in a silt loam soil at Freeman farm of Lincoln University. Soil samples were collected at two depths: 0-10 and 10-20 cm and their bulk densities were measured. Samples were later saturated then brought into a pressure plate for measurements of Ψ and θ. Soil air samples for greenhouse gas flux analyses were collected using static and vented chambers, 30 cm in height and 20 cm in diameter. Determination of CO2, CH4 and N2O concentrations from soil air samples were done using a Shimadzu Gas Chromatograph . Results showed that there were significant correlations between greenhouse gas fluxes and θ held at various Ψ in the 0-10 cm depth of soil group. For instance, θ at Ψ = 0 positively correlated with measured CO2 (p = 0.0043, r = 0.49), N2O (p = 0.0020, r = 0.64) and negatively correlated with CH4 (p = 0.0125, r = −0.44) fluxes. Regression analysis showed that 24%, 41% and 19% of changes in CO2, N2O and CH4 fluxes, respectively, were due to θ at Ψ = 0 (p < 0.05). This study stresses the need to monitor soil water potential when monitoring greenhouse gas fluxes. OPEN ACCESSClimate 2015, 3 690

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Greenhouse gases fluxes and soil thermal properties in a pasture in central Missouri

Cited by 28 publications

References 53 publications

Greenhouse gas emissions from dairy open lot and manure stockpile in northern China: A case study

Greenhouse gas emissions from dairy open lot and manure stockpile in northern China: A case study

Methane flux response to nitrogen amendment in an upland pine forest soil and riparian zone

Soil Water Potential Control of the Relationship between Moisture and Greenhouse Gas Fluxes in Corn-Soybean Field

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