scholarly journals Meta-Analysis of Environmental Impacts on Nitrous Oxide Release in Response to N Amendment

2012 ◽  
Vol 3 ◽  
Author(s):  
Emma L. Aronson ◽  
Steven D. Allison
Keyword(s):  
Nitrous Oxide ◽  
Environmental Impacts ◽  
Meta Analysis ◽  
Nitrous Oxide Release

Yield-scaled nitrous oxide emissions from nitrogen-fertilized croplands in China: A meta-analysis of contrasting mitigation scenarios

Pedosphere ◽  
2021 ◽  
Vol 31 (2) ◽  
pp. 231-242
Author(s):  
Garba ALIYU ◽  
Jiafa LUO ◽  
Hong J. DI ◽  
Deyan LIU ◽  
Junji YUAN ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Meta Analysis ◽  
Nitrous Oxide Emissions ◽  
Mitigation Scenarios

How does soil compaction alter nitrous oxide fluxes? A meta-analysis

2021 ◽  
Vol 211 ◽  
pp. 105036
Author(s):  
Guillermo Hernandez-Ramirez ◽  
Reiner Ruser ◽  
Dong-Gill Kim
Keyword(s):  
Nitrous Oxide ◽  
Soil Compaction ◽  
Meta Analysis

scholarly journals Crop Yield and Nitrous Oxide Emissions following Swine Manure Application: A Meta‐Analysis

ael ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 190024 ◽  
Author(s):  
Weiquan Luo ◽  
Peter L. O'Brien ◽  
Jerry L. Hatfield
Keyword(s):  
Nitrous Oxide ◽  
Crop Yield ◽  
Meta Analysis ◽  
Swine Manure ◽  
Nitrous Oxide Emissions ◽  
Manure Application

scholarly journals Relationship Between Salivary Nitric Oxide Concentration and Dental Caries in Children: A Systematic Review and Meta-Analysis

2020 ◽  
Vol In Press (In Press) ◽  
Author(s):  
Nadia Elyassi ◽  
Ali Malekzadeh Shafaroudi ◽  
Pegah Nasiri ◽  
Mahmood Moosazadeh ◽  
Azam Nahvi
Keyword(s):  
Nitric Oxide ◽  
Nitrous Oxide ◽  
Dental Caries ◽  
Meta Analysis ◽  
Control Group ◽  
Analysis Study ◽  
Oxide Concentration ◽  
The Mean ◽  
The Relationship ◽  
Nitrous Oxide Concentration

Context: Conflicting results have been reported in the literature concerning the relationship between salivary nitrous oxide concentration and dental caries in children. Metaanalysis studies aim to combine different studies and reduce the difference between the parameters by increasing the number of studies involved in the analysis process. Objectives: Accordingly, this meta-analysis study aimed at determining the relationship between salivary nitrous oxide concentration and dental caries in children. Methods: Databases were searched using the keywords “nitric oxide”, “salivary”, “Caries”, “DMFT Index”, “children”, “early childhood caries” and OR, AND and NOT operators. Quality assessment was then performed based on the Newcastle-Ottawa scale (NOS) checklist. The standardized mean difference (SMD) of DMFT, dmft, and salivary nitric oxide (NO) concentration was estimated. Results: Seven studies made a comparison between the mean salivary NO concentration in children with dental caries and that in the control group. In four studies, the mean salivary NO concentration in children with dental caries was lower, as compared to that in the control group. This difference was significant in all four studies. Also, the mean standardized difference of the salivary NO index was also estimated to be -0.11 (CI 95%: -1.77, 1.55). Conclusions: This meta-analysis study demonstrated that salivary NO concentration was not significantly related to dental caries. Moreover, since salivary NO concentration is affected by various factors, it is not sufficient to determine the likelihood of the incidence of caries.

scholarly journals Environmental controls of greenhouse gas release in a restoring peat bog in NW Germany

2008 ◽  
Vol 5 (1) ◽  
pp. 213-242 ◽  
Author(s):  
S. Glatzel ◽  
I. Forbrich ◽  
C. Krüger ◽  
S. Lemke ◽  
G. Gerold
Keyword(s):  
Nitrous Oxide ◽  
Greenhouse Gas ◽  
Nitrogen Deposition ◽  
Stress Factors ◽  
Atmospheric Nitrogen Deposition ◽  
Gas Release ◽  
Atmospheric Nitrogen ◽  
Nw Germany ◽  
Surface Peat ◽  
Nitrous Oxide Release

Abstract. In Central Europe, most bogs have a history of drainage and many of them are currently being restored. Success of restoration as well as greenhouse gas exchange of these bogs is influenced by environmental stress factors as drought and atmospheric nitrogen deposition. We determined the methane and nitrous oxide exchange of sites in the strongly decomposed center and less decomposed edge of the Pietzmoor bog in NW Germany in 2004. Also, we examined the methane and nitrous oxide exchange of mesocosms from the center and edge before, during, and following a drainage experiment as well as carbon dioxide release from disturbed unfertilized and nitrogen fertilized surface peat. In the field, methane fluxes ranged from 0 to 3.8 mg m−2 h−1 and were highest from hollows. Field nitrous oxide fluxes ranged from 0 to 574 μg m−2 h−1 and were elevated at the edge. A large Eriophorum vaginatum tussock showed decreasing nitrous oxide release as the season progressed. Drainage of mesocosms decreased methane release to 0, even during rewetting. There was a tendency for a decrease of nitrous oxide release during drainage and for an increase in nitrous oxide release during rewetting. Nitrogen fertilization did not increase decomposition of surface peat. Our examinations suggest a competition between vascular vegetation and denitrifiers for excess nitrogen. We also provide evidence that the von Post humification index can be used to explain greenhouse gas release from bogs, if the role of vascular vegetation is also considered. An assessment of the greenhouse gas release from nitrogen saturated restoring bogs needs to take into account elevated release from fresh Sphagnum peat as well as from sedges growing on decomposed peat. Given the high atmospheric nitrogen deposition, restoration will not be able to achieve an oligotrophic ecosystem in the short term.

scholarly journals Environmental impacts of nitrous oxide: no laughing matter! Comment on Br J Anaesth 2019; 122: 587–604

2019 ◽  
Vol 123 (4) ◽  
pp. e481-e482 ◽  
Author(s):  
Jane Muret ◽  
Tiago David Fernandes ◽  
Herwig Gerlach ◽  
Georgina Imberger ◽  
Henrik Jörnvall ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Environmental Impacts

scholarly journals Emission factors for estimating fertiliser-induced nitrous oxide emissions from clay soils in Australia’s irrigated cotton industry

Soil Research ◽  
2016 ◽  
Vol 54 (5) ◽  
pp. 598 ◽  
Author(s):  
Peter Grace ◽  
Iurii Shcherbak ◽  
Ben Macdonald ◽  
Clemens Scheer ◽  
David Rowlings
Keyword(s):  
Nitrous Oxide ◽  
Meta Analysis ◽  
Exponential Model ◽  
N2o Emission ◽  
Nitrous Oxide Emissions ◽  
N2o Emissions ◽  
Tier 2 ◽  
Cotton Industry ◽  
Greenhouse Gas Inventories ◽  
N Rates

As a significant user of nitrogen (N) fertilisers, the Australian cotton industry is a major source of soil-derived nitrous oxide (N2O) emissions. A country-specific (Tier 2) fertiliser-induced emission factor (EF) can be used in national greenhouse gas inventories or in the development of N2O emissions offset methodologies provided the EFs are evidence based. A meta-analysis was performed using eight individual N2O emission studies from Australian cotton studies to estimate EFs. Annual N2O emissions from cotton grown on Vertosols ranged from 0.59kgNha–1 in a 0N control to 1.94kgNha–1 in a treatment receiving 270kgNha–1. Seasonal N2O estimates ranged from 0.51kgNha–1 in a 0N control to 10.64kgNha–1 in response to the addition of 320kgNha–1. A two-component (linear+exponential) statistical model, namely EF (%)=0.29+0.007(e0.037N – 1)/N, capped at 300kgNha–1 describes the N2O emissions from lower N rates better than an exponential model and aligns with an EF of 0.55% using a traditional linear regression model.

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