Nitrogen Source Effects on Soil Nitrous Oxide Emissions from Strip-Till Corn

2011 ◽  
Vol 40 (6) ◽  
pp. 1775-1786 ◽  
Author(s):  
Ardell D. Halvorson ◽  
Stephen J. Del Grosso ◽  
Claudia Pozzi Jantalia
Keyword(s):  
Nitrous Oxide ◽  
Nitrogen Source ◽  
Nitrous Oxide Emissions ◽  
Source Effects

Nitrogen Source Effects on Nitrous Oxide Emissions from Irrigated No-Till Corn

2010 ◽  
Vol 39 (5) ◽  
pp. 1554-1562 ◽  
Author(s):  
Ardell D. Halvorson ◽  
Stephen J. Del Grosso ◽  
Francesco Alluvione
Keyword(s):  
Nitrous Oxide ◽  
Nitrogen Source ◽  
Nitrous Oxide Emissions ◽  
Source Effects ◽  
No Till

Nitrogen Source, Application Time, and Tillage Effects on Soil Nitrous Oxide Emissions and Corn Grain Yields

2012 ◽  
Vol 76 (4) ◽  
pp. 1268-1279 ◽  
Author(s):  
C. F. Drury ◽  
W. D. Reynolds ◽  
X. M. Yang ◽  
N. B. McLaughlin ◽  
T. W. Welacky ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Nitrogen Source ◽  
Nitrous Oxide Emissions ◽  
Application Time ◽  
Grain Yields ◽  
Corn Grain

Influence of fertilizer nitrogen source and management practice on N2O emissions from two Black Chernozemic soils

2008 ◽  
Vol 88 (2) ◽  
pp. 219-227 ◽  
Author(s):  
D L Burton ◽  
Xinhui Li ◽  
C A Grant
Keyword(s):  
Nitrous Oxide ◽  
Nitrogen Source ◽  
Nitrogen Fertilizer ◽  
Management Practice ◽  
Nitrous Oxide Emissions ◽  
N2o Emissions ◽  
Intergovernmental Panel ◽  
Fertilizer Nitrogen ◽  
Anhydrous Ammonia ◽  
Time Of Application

Fertilizer nitrogen use is estimated to be a significant source of nitrous oxide (N2O) emissions in western Canada. These estimates are based primarily on modeled data, as there are relatively few studies that provide direct measures of the magnitude of N2O emissions and the influence of N source on N2O emissions. This study examined the influence of nitrogen source (urea, coated urea, urea with urease inhibitor, and anhydrous ammonia), time of application (spring, fall) and method of application (broadcast, banded) on nitrous oxide emissions on two Black Chernozemic soils located near Winnipeg and Brandon Manitoba. The results of this 3-yr study demonstrated consistently that the rate of fertilizer-induced N2O emissions under Manitoba conditions was lower than the emissions estimated using Intergovernmental Panel on Climate Change (IPCC) coefficients. The Winnipeg site tended to have higher overall N2O emissions (1.7 kg N ha-1) and fertilizer-induced emissions (~0.8% of applied N) than did the Brandon site (0.5 kg N ha-1), representing ~0.2% of applied N. N2O emissions in the first year of the study were much higher than in subsequent years. Both the site and year effects likely reflected differences in annual precipitation. The N2O emissions associated with the use of anhydrous ammonia as a fertilizer source were no greater than emissions with urea. Fall application of nitrogen fertilizer tended to result in marginally greater N2O emissions than did spring application, but these differences were neither large nor consistent. Key words: Nitrogen fertilizer, nitrous oxide emissions, nitrate intensity, anhydrous ammonia, urea

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