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Effect of persistent subsoil compaction on N2O emissions from arable soils

Regina, Kristiina; Simojoki, Asko; Alakukku, Laura; Silvennoinen, Hanna; Dörsch, Peter and Keller, Thomas (2011) Effect of persistent subsoil compaction on N2O emissions from arable soils. Food, feed, fuel and fun : Nordic light on future land use and rural development, 24 th NJF congress, Uppsala, Sweden, June 14-16, 2011.

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Summary

Compaction occasionally increased N2O in soil air.
No large differences in soil air composition, N2O emissions or moisture content were found between the treatments.
The N2O concentrations at 15, 30, 50 and 70 cm depths correlated positively with the emission of N2O from the soil in both fields (r=0.4-0.7***).
The subsoil O2 concentrations correlated negatively with N2O emission, but only at the Finnish site.
The results suggest that subsoil compaction does not significantly increase N2O emissions from these soils 15-30 years after compaction. This may indicate a minor role of subsoil in the production of N2O compared with topsoil.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Other
Keywords:subsoil compaction, N2O emissions, arable soils
Subjects: Soil
Research affiliation: Finland > Univ. Helsinki
Finland > MTT Agrifood Research
Deposited By: Koistinen, Riitta
ID Code:19576
Deposited On:28 Oct 2011 11:21
Last Modified:28 Oct 2011 11:21
Document Language:English
Status:Published
Refereed:Not peer-reviewed

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