The Role of Bacteria and Archaea in Nitrification, Nitrate Leaching and Nitrous Oxide Emissions in Nitrogen-Rich Grassland Soils

2012 ◽  
pp. 79-89 ◽  
Author(s):  
Hong J. Di ◽  
Keith C. Cameron ◽  
Ju-Pei Shen ◽  
Chris S. Winefield ◽  
Maureen O’Callaghan ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Nitrate Leaching ◽  
Nitrous Oxide Emissions ◽  
Grassland Soils

Improving Estimates of Nitrate Leaching for Quantifying New Zealand’s Indirect Nitrous Oxide Emissions

2005 ◽  
Vol 73 (2-3) ◽  
pp. 213-226 ◽  
Author(s):  
Stephen M. Thomas ◽  
Stewart F. Ledgard ◽  
Glyn S. Francis
Keyword(s):  
Nitrous Oxide ◽  
Nitrate Leaching ◽  
Nitrous Oxide Emissions

scholarly journals Modelling Methane and Nitrous Oxide Emissions from Rice Paddy Wetlands in India Using Artificial Neural Networks (ANNs)

Water ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 2169 ◽  
Author(s):  
Tabassum Abbasi ◽  
Tasneem Abbasi ◽  
Chirchom Luithui ◽  
Shahid Abbas Abbasi
Keyword(s):  
Nitrous Oxide ◽  
Paddy Fields ◽  
Anthropogenic Sources ◽  
Nitrous Oxide Emissions ◽  
Soil Conditions ◽  
N2o Emissions ◽  
Ch4 Emissions ◽  
Artificial Neural ◽  
Ch4 And N2o

Paddy fields, which are shallow man-made wetlands, are estimated to be responsible for ~11% of the total methane emissions attributed to anthropogenic sources. The role of water use in driving these emissions, and the apportioning of the emissions to individual countries engaged in paddy cultivation, are aspects that have been mired in controversy and disagreement. This is largely due to the fact that methane (CH4) emissions not only change with the cultivar type but also regions, climate, soil type, soil conditions, manner of irrigation, type and quantity of fertilizer added—to name a few. The factors which can influence these aspects also encompass a wide range, and have origins in causes which can be physical, chemical, biological, and combinations of these. Exceedingly complex feedback mechanisms, exerting different magnitudes and types of influences on CH4 emissions under different conditions, are operative. Similar is the case of nitrous oxide (N2O); indeed, the present level of understanding of the factors which influence the quantum of its emission is still more patchy. This makes it difficult to even understand precisely the role of the myriad factors, less so model them. The challenge is made even more daunting by the fact that accurate and precise data on most of these aspects is lacking. This makes it nearly impossible to develop analytical models linking causes with effects vis a vis CH4 and N2O emissions from paddy fields. For situations like this the bioinspired artificial intelligence technique of artificial neural network (ANN), which can model a phenomenon on the basis of past data and without the explicit understanding of the mechanism phenomena, may prove useful. However, no such model for CH4 or N2O has been developed so far. Hence the present work was undertaken. It describes ANN-based models developed by us to predict CH4 and N2O emissions using soil characteristics, fertilizer inputs, and rice cultivar yield as inputs. Upon testing the predictive ability of the models with sets of data not used in model development, it was seen that there was excellent agreement between model forecasts and experimental findings, leading to correlations coefficients of 0.991 and 0.96, and root mean square error (RMSE) of 11.17 and 261.3, respectively, for CH4 and N2O emissions. Thus, the models can be used to estimate CH4 and N2O emissions from all those continuously flooded paddy wetlands for which data on total organic carbon, soil electrical conductivity, applied nitrogen, phosphorous and potassium, NPK, and grain yield is available.

Nitrate leaching and nitrous oxide emissions from maize after grass-clover on a coarse sandy soil: Mitigation potentials of 3,4-dimethylpyrazole phosphate (DMPP)

2020 ◽  
Vol 260 ◽  
pp. 110165 ◽  
Author(s):  
Drishya Nair ◽  
Khagendra R. Baral ◽  
Diego Abalos ◽  
Bjarne W. Strobel ◽  
Søren O. Petersen
Keyword(s):  
Nitrous Oxide ◽  
Sandy Soil ◽  
Nitrate Leaching ◽  
Nitrous Oxide Emissions ◽  
Mitigation Potentials

Nitrous oxide emissions and nitrate leaching from a rain-fed wheat-maize rotation in the Sichuan Basin, China

2012 ◽  
Vol 362 (1-2) ◽  
pp. 149-159 ◽  
Author(s):  
Minghua Zhou ◽  
Bo Zhu ◽  
Klaus Butterbach-Bahl ◽  
Xunhua Zheng ◽  
Tao Wang ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Nitrate Leaching ◽  
Sichuan Basin ◽  
Nitrous Oxide Emissions ◽  
The Sichuan Basin

scholarly journals Beyond denitrification: the role of microbial diversity in controlling nitrous oxide reduction and soil nitrous oxide emissions

2021 ◽  
Author(s):  
Jun Shan ◽  
Robert A. Sanford ◽  
Joanne Chee‐Sanford ◽  
Sean Khan Ooi ◽  
Frank E. Löffler ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Microbial Diversity ◽  
Nitrous Oxide Emissions ◽  
Oxide Reduction ◽  
Nitrous Oxide Reduction

Modelling uncertainty for nitrate leaching and nitrous oxide emissions based on a Swedish field experiment with organic crop rotation

2011 ◽  
Vol 141 (1-2) ◽  
pp. 167-183 ◽  
Author(s):  
Josefine Nylinder ◽  
Maria Stenberg ◽  
Per-Erik Jansson ◽  
Åsa Kasimir Klemedtsson ◽  
Per Weslien ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Field Experiment ◽  
Crop Rotation ◽  
Nitrate Leaching ◽  
Nitrous Oxide Emissions ◽  
Modelling Uncertainty

Nitrous oxide emissions and nitrate leaching in relation to microbial biomass dynamics in a beech forest soil

2002 ◽  
Vol 34 (6) ◽  
pp. 823-832 ◽  
Author(s):  
Sophie Zechmeister-Boltenstern ◽  
Maria Hahn ◽  
Simone Meger ◽  
Robert Jandl
Keyword(s):  
Nitrous Oxide ◽  
Microbial Biomass ◽  
Forest Soil ◽  
Nitrate Leaching ◽  
Beech Forest ◽  
Nitrous Oxide Emissions ◽  
Biomass Dynamics
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