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The Scientific World Journal
Volume 2014, Article ID 141345, 12 pages
http://dx.doi.org/10.1155/2014/141345
Research Article

Measurements of Soil Carbon Dioxide Emissions from Two Maize Agroecosystems at Harvest under Different Tillage Conditions

1Department of Mathematics & Physics, Catholic University, via dei Musei 41, 25121 Brescia, Italy
2ERSAF, Regional Agency for Services to the Agriculture and Forests of the Lombardy Region, via Pola 12, 20124 Milan, Italy

Received 13 May 2014; Revised 29 August 2014; Accepted 1 September 2014; Published 28 October 2014

Academic Editor: Ana Iglesias

Copyright © 2014 Gerosa Giacomo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In this study a comparison of the soil CO2 fluxes emitted from two maize (Zea mays L.) fields with the same soil type was performed. Each field was treated with a different tillage technique: conventional tillage (30 cm depth ploughing) and no-tillage. Measurements were performed in the Po Valley (Italy) from September to October 2012, covering both pre- and postharvesting conditions, by means of two identical systems based on automatic static soil chambers. Main results show that no-tillage technique caused higher CO2 emissions than conventional tillage (on average 2.78 and 0.79 μmol CO2 m−2 s−1, resp.). This result is likely due to decomposition of the organic litter left on the ground of the no-tillage site and thus to an increased microbial and invertebrate respiration. On the other hand, fuel consumption of conventional tillage technique is greater than no-tillage consumptions. For these reasons this result cannot be taken as general. More investigations are needed to take into account all the emissions related to the field management cycle.