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Soil carbon stocks, carbon dioxide sequestration and tillage techniques

Francaviglia, Rosa and Farina, Roberta and Corti, Giuseppe and De Sanctis, Giacomo and Roggero, Pier Paolo (2008) Soil carbon stocks, carbon dioxide sequestration and tillage techniques. Italian Journal of Agronomy, Vol. 3 (3 Suppl.), p. 841-842. ISSN 1125-4718. Article.

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Abstract

C sequestration via agricultural soils can be accounted for, under Article 3.4 of the Kyoto Protocol, provided that specific measures are implemented. Sound cropland management can play a positive role in mitigating GHGs emissions from other sources, and carbon dioxide in particular, through a decrease of soil organic carbon (SOC) losses, an increase of organic material inputs or combining these two options. Literature data estimate about 1,500 Gg SOC to 1 m depth (Eswaran et al., 2000), in comparison with 4,000 Gg C of fossil fuels, indicating SOC as the largest sink of C after fossil fuels. Vegetation (600 Gg) and atmosphere (760 Gg) store considerably less C than soils.
Carbon sequestration can occur through a reduction in soil disturbance, since more carbon is lost as CO2 from tilled soils in comparison with reduced or sod-seeding systems: no tillage systems may absorb on average 0.7-1.4 t CO2 ha-1 yr-1 (INRA 2002, ECCP 2003).
This paper compares the effects of conventional tillage and sod-seeding on SOC, in a two-years rotation long term field experiment (durum wheat-sunflower 1994-01; durum wheat-corn 2002-06).

Item Type:Article
ID Code:3723
Status:Published
Refereed:Yes
Uncontrolled Keywords:C sequestration, GHGs emissions, conventional tillage, sod-seeding
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/02 Agronomia e coltivazioni erbacee
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze agronomiche e genetica vegetale agraria
Publisher:Forum editrice udinese
ISSN:1125-4718
Copyright Holders:© Italian Society for Agronomy
Publisher Policy:Depositato per gentile concessione dell'Editore e della Società italiana di agronomia
Additional Information:Oral presentation at the Multi-functional agriculture: agriculture as a resource for energy and environmental preservation: 10. Congress of the European Society of Agronomy, Bologna, Italy, 15-19 September 2008.
Deposited On:14 Apr 2010 09:22

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