Simulating improved combinations tillage-rotation under dryland conditions.

Soldevilla Martínez, María and Martin-Lammerding, D. and Tenorio, J.L. and Walter, I. and Quemada Saenz-Badillos, Miguel and Lizaso Oñate, Jon Iñaqui (2013). Simulating improved combinations tillage-rotation under dryland conditions.. "Spanish Journal of Agricultural Research", v. 11 (n. 3); pp. 820-832. ISSN 1695-971X.


Title: Simulating improved combinations tillage-rotation under dryland conditions.
  • Soldevilla Martínez, María
  • Martin-Lammerding, D.
  • Tenorio, J.L.
  • Walter, I.
  • Quemada Saenz-Badillos, Miguel
  • Lizaso Oñate, Jon Iñaqui
Item Type: Article
Título de Revista/Publicación: Spanish Journal of Agricultural Research
Date: 2013
Volume: 11
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Producción Vegetal: Fitotecnia [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Crop simulation models allow analyzing various tillage-rotation combinations and exploring management scenarios. This study was conducted to test the DSSAT (Decision Support System for Agrotechnology Transfer) modelling system in rainfed semiarid central Spain. The focus is on the combined effect of tillage system and winter cereal-based rotations (cereal/legume/fallow) on the crop yield and soil quality. The observed data come from a 16-year field experiment. The CERES and CROPGRO models, included in DSSAT v4.5, were used to simulate crop growth and yield, and DSSAT- CENTURY was used in the soil organic carbon (SOC) and soil nitrogen (SN) simulations. Genetic coefficients were calibrated using part of the observed data. Field observations showed that barley grain yield was lower for continuous cereal (BB) than for vetch (VB) and fallow (FB) rotations for both tillage systems. The CERES-Barley model also reflected this trend. The model predicted higher yield in the conventional tillage (CT) than in the no tillage (NT) probably due to the higher nitrogen availability in the CT, shown in the simulations. The SOC and SN in the top layer only, were higher in NT than in CT, and decreased with depth in both simulated and observed values. These results suggest that CT-VB and CT-FB were the best combinations for the dry land conditions studied. However, CT presented lower SN and SOC content than NT. This study shows how models can be a useful tool for assessing and predicting crop growth and yield, under different management systems and under specific edapho-climatic conditions. Additional key words: CENTURY model; CERES-Barley; crop simulation models; DSSAT; sequential simula- tion; soil organic carbon.

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Item ID: 31082
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Deposited by: Memoria Investigacion
Deposited on: 08 Oct 2014 17:04
Last Modified: 08 Oct 2014 17:04
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