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Long term effects of nitrogen fertilization on soil organic matter: applications of the DSSAT model

De Sanctis, Giacomo and Seddaiu, Giovanna and Iezzi, Giuseppe and Toderi, Marco and Orsini, Roberto and Porter, Cheryl and Roggero, Pier Paolo and Jones, Jim W. (2008) Long term effects of nitrogen fertilization on soil organic matter: applications of the DSSAT model. Italian Journal of Agronomy, Vol. 3 (3 Suppl.), p. 769-770. ISSN 1125-4718. Article.

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Abstract

The conversion from natural to agricultural ecosystems and unsustainable land management and agricultural practices have often lowered the soil organic matter (SOM) content (Doran, 2002). An increase of SOM is required almost everywhere (Triberti et al. 2008), since it plays a key role to maintain sustainable cropping systems. It prevents soil degradation by limiting soil cracking and erosion, reduces pollution risks by adsorbing toxic substances, improves soil structure, plant nutrients availability and soil microbial biodiversity. Part of SOM which has been lost can be re-sequestered through adoption of recommended soil and crop management practices. DSSAT 4.02 (Jones et al., 2003) has been recently integrated with the CENTURY SOM module (Gijsman et aI., 2002) and the module for tillage effects on soil processes, to simulate the long term dynamics of SOM.
The objective of this study was to analyze the long term impact of tillage and fertility management on soil organic matter fractions in a durum wheat-corn rotation in a hilly rainfed area using field experiments and model simulations. In this paper we report the results of the effect of the nitrogen fertilization on SOM.

Item Type:Article
ID Code:3721
Status:Published
Refereed:Yes
Uncontrolled Keywords:Land management, agricultural practices, soil organic matter content, wheat-corn rotation
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:Poster presented 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:13 Apr 2010 13:57

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