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Fertilizer management and environmental factors drive n2o and no3 losses in corn: A meta-analysis

Publication ,  Journal Article
Eagle, AJ; Olander, LP; Locklier, KL; Heffernan, JB; Bernhardt, ES
Published in: Soil Science Society of America Journal
September 1, 2017

Effective management of nitrogen (N) in agricultural landscapes must account for how nitrate (NO3) leaching and nitrous oxide (N2O) emissions respond to local field-scale management and to broader environmental drivers such as climate and soil. We assembled a comprehensive database of fertilizer management studies with data on N2O (417 observations, 27 studies) and NO3 (388 observations, 25 studies) losses associated with 4R fertilizer N management in North American corn-cropping systems. Only one study measured both losses, and studies of N2O and NO3 differed by location, time period, and management practices. Meta-analysis of side-by-side comparisons found significant yield-scaled N2O emission reductions when SUPERU replaced urea or UAN, and when urea replaced anhydrous ammonia. Hierarchical regression models found near-equivalent magnitude effects on N2O emissions of 1°C rise in average July temperature (+), increase in soil C by 10 g kg-1 (+), nitrification inhibitors (-), side-dressed fertilizer timing (-), broadcast fertilizer (-), and 100 kg N ha-1 decrease in fertilizer rate (-). Average NO3 leaching response to 100 kg N ha-1 reduction in fertilizer rate (-) were comparable to effects of 100 mm less annual precipitation (-), 10 g kg-1 more soil C (-), or replacing continuous corn with corn-soybean rotations (-). The large effects of climate and soil, and the potential for opposite reactions to some management changes, indicate that more simultaneous measurements of N2O and NO3 losses are needed to understand their joint responses to management and environmental factors, and how these shape tradeoffs or synergies in pathways of N loss.

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Published In

Soil Science Society of America Journal

DOI

EISSN

1435-0661

ISSN

0361-5995

Publication Date

September 1, 2017

Volume

81

Issue

5

Start / End Page

1191 / 1202

Related Subject Headings

  • Agronomy & Agriculture
  • 41 Environmental sciences
  • 31 Biological sciences
  • 30 Agricultural, veterinary and food sciences
  • 07 Agricultural and Veterinary Sciences
  • 06 Biological Sciences
  • 05 Environmental Sciences
 

Citation

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Eagle, A. J., Olander, L. P., Locklier, K. L., Heffernan, J. B., & Bernhardt, E. S. (2017). Fertilizer management and environmental factors drive n2o and no3 losses in corn: A meta-analysis. Soil Science Society of America Journal, 81(5), 1191–1202. https://doi.org/10.2136/sssaj2016.09.0281
Eagle, A. J., L. P. Olander, K. L. Locklier, J. B. Heffernan, and E. S. Bernhardt. “Fertilizer management and environmental factors drive n2o and no3 losses in corn: A meta-analysis.” Soil Science Society of America Journal 81, no. 5 (September 1, 2017): 1191–1202. https://doi.org/10.2136/sssaj2016.09.0281.
Eagle AJ, Olander LP, Locklier KL, Heffernan JB, Bernhardt ES. Fertilizer management and environmental factors drive n2o and no3 losses in corn: A meta-analysis. Soil Science Society of America Journal. 2017 Sep 1;81(5):1191–202.
Eagle, A. J., et al. “Fertilizer management and environmental factors drive n2o and no3 losses in corn: A meta-analysis.” Soil Science Society of America Journal, vol. 81, no. 5, Sept. 2017, pp. 1191–202. Scopus, doi:10.2136/sssaj2016.09.0281.
Eagle AJ, Olander LP, Locklier KL, Heffernan JB, Bernhardt ES. Fertilizer management and environmental factors drive n2o and no3 losses in corn: A meta-analysis. Soil Science Society of America Journal. 2017 Sep 1;81(5):1191–1202.

Published In

Soil Science Society of America Journal

DOI

EISSN

1435-0661

ISSN

0361-5995

Publication Date

September 1, 2017

Volume

81

Issue

5

Start / End Page

1191 / 1202

Related Subject Headings

  • Agronomy & Agriculture
  • 41 Environmental sciences
  • 31 Biological sciences
  • 30 Agricultural, veterinary and food sciences
  • 07 Agricultural and Veterinary Sciences
  • 06 Biological Sciences
  • 05 Environmental Sciences