Quantifying the Effects of Green Waste Compost Application, Water Content and Nitrogen Fertilization on Nitrous Oxide Emissions in 10 Agricultural Soils

2013 ◽  
Vol 42 (3) ◽  
pp. 912-918 ◽  
Author(s):  
Xia Zhu ◽  
Lucas C.R. Silva ◽  
Timothy A. Doane ◽  
Ning Wu ◽  
William R. Horwath
Keyword(s):  
Nitrous Oxide ◽  
Water Content ◽  
Nitrogen Fertilization ◽  
Agricultural Soils ◽  
Nitrous Oxide Emissions ◽  
Green Waste ◽  
Compost Application

scholarly journals Nitrification rates and associated nitrous oxide emissions from agricultural soils – a synopsis

Soil Research ◽  
2016 ◽  
Vol 54 (5) ◽  
pp. 469 ◽  
Author(s):  
Ryan Farquharson
Keyword(s):  
Nitrous Oxide ◽  
Water Content ◽  
Agricultural Soils ◽  
Strong Support ◽  
Specific Model ◽  
Nitrous Oxide Emissions ◽  
Ammonium Concentration ◽  
N2o Emissions ◽  
Site Specific ◽  
Aerobic Conditions

Laboratory incubations were performed to estimate nitrification rates and the associated nitrous oxide (N2O) emissions under aerobic conditions on a range of soils from National Agricultural Nitrous Oxide Research Program field sites. Significant site-to-site variability in nitrification rates and associated N2O emissions was observed under standardised conditions, indicating the need for site-specific model parameterisation. Generally, nitrification rates and N2O emissions increased with higher water content, ammonium concentration and temperature, although there were exceptions. It is recommended that site-specific model parameterisation be informed by such data. Importantly, the ratio of N2O emitted to net nitrified N under aerobic conditions was small (<0.2% for the majority of measurements) but did vary from 0.03% to 1%. Some models now include variation in the proportion of nitrified N emitted as N2O as a function of water content; however, strong support for this was not found across all of our experiments, and the results demonstrate a potential role of pH and ammonium availability. Further research into fluctuating oxygen availability and the coupling of biotic and abiotic processes will be required to progress the process understanding of N2O emissions from nitrification.

Soil nitrous oxide emissions as affected by long-term tillage, cropping systems and nitrogen fertilization in Southern Brazil

2015 ◽  
Vol 146 ◽  
pp. 213-222 ◽  
Author(s):  
Cimélio Bayer ◽  
Juliana Gomes ◽  
Josiléia Accordi Zanatta ◽  
Frederico Costa Beber Vieira ◽  
Marisa de Cássia Piccolo ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Nitrogen Fertilization ◽  
Cropping Systems ◽  
Nitrous Oxide Emissions ◽  
Southern Brazil

Soil nitrous oxide emissions from agricultural soils in Canada: Exploring relationships with soil, crop and climatic variables

2018 ◽  
Vol 254 ◽  
pp. 69-81 ◽  
Author(s):  
Philippe Rochette ◽  
Chang Liang ◽  
David Pelster ◽  
Onil Bergeron ◽  
Reynald Lemke ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Agricultural Soils ◽  
Climatic Variables ◽  
Nitrous Oxide Emissions

Diurnal Variation and Sampling Frequency Effects on Nitrous Oxide Emissions Following Nitrogen Fertilization and Spring-Thaw Events

2019 ◽  
Vol 83 (3) ◽  
pp. 743-750 ◽  
Author(s):  
Pedro Vitor Ferrari Machado ◽  
Claudia Wagner-Riddle ◽  
Robert MacTavish ◽  
Paul R. Voroney ◽  
Thomas W. Bruulsema
Keyword(s):  
Nitrous Oxide ◽  
Diurnal Variation ◽  
Nitrogen Fertilization ◽  
Sampling Frequency ◽  
Nitrous Oxide Emissions ◽  
Frequency Effects

Green waste compost reduces nitrous oxide emissions from feedlot manure applied to soil

2010 ◽  
Vol 136 (3-4) ◽  
pp. 273-281 ◽  
Author(s):  
Ram C. Dalal ◽  
Iain Gibson ◽  
Diane E. Allen ◽  
Neal W. Menzies
Keyword(s):  
Nitrous Oxide ◽  
Nitrous Oxide Emissions ◽  
Green Waste

The effects of spatial variability of nitrous oxide emissions from grazed pastures on the sampling distribution of chamber measurements

2015 ◽  
Vol 154 (2) ◽  
pp. 223-241 ◽  
Author(s):  
D. L. GILTRAP ◽  
A. J. R. GODFREY
Keyword(s):  
Nitrous Oxide ◽  
Spatial Variability ◽  
Agricultural Soils ◽  
Geometric Mean ◽  
Arithmetic Mean ◽  
Nitrous Oxide Emissions ◽  
Sample Mean ◽  
Grazed Pastures ◽  
Urine Patch ◽  
The Mean

SUMMARYChamber sampling is a common method for measuring nitrous oxide (N2O) emissions from agricultural soils. However, for grazed pastures, the patchy nature of urine deposition results in very high levels of spatial variability in N2O emissions. In the present study, the behaviour of the sample mean was examined by simulating a large number (9999) of random N2O chamber samples under different assumptions regarding the underlying N2O distribution. Using sample sizes of up to 100 chambers, the Central Limit Theorem did not apply. The distribution of the sample mean was always right-skewed with a standard deviation varying between 12·5 and 135% of the true mean. However, the arithmetic mean was an unbiased estimator and the mean of the sample mean distribution was close to the true mean of the simulated N2O distribution. The properties of the sample mean distribution (variance, skewness) were affected significantly by the assumed distribution of the emission factor, but not by distribution of the urine patch concentration. The geometric mean was also investigated as a potential alternative estimator. However, although its distribution had lower variance, it was also biased. Two methods for bias correcting the mean were investigated. These methods reduced the bias, but at the cost of increasing the variance. Neither of the bias-corrected estimators were consistently better than the arithmetic mean in terms of skewness and variance. To improve the estimation of N2O emissions from a grazed pasture using chambers, techniques need to be developed to identify urine patch and non-urine patch areas before sampling.

Sign in / Sign up

Export Citation Format

Share Document