Temperature and Photoperiod Effects on Vicia faba Phenology Simulated by CROPGRO-Fababean
- Adriana Confalonea,
- Kenneth J. Booteb,
- Jon I. Lizasoc and
- Federico Sau *d
- a Agrometeorología, Facultad de Agronomía, UNCPBA, Azul, BA, Argentina
b Dep. of Agronomy, Univ. of Florida, Gainesville, FL 32611
c Dep. de Producción Vegetal-Fitotecnia, Escuela Técnica Superior de Ingenieros Agrónomos, Univ. Politécnica de Madrid, 28040 Madrid, Spain
d Dep. de Biología Vegetal, Escuela Técnica Superior de Ingenieros Agrónomos, Univ. Politécnica de Madrid, 28040 Madrid, Spain
Models may be useful tools to design efficient crop management practices provided they are able to accurately simulate the effect of weather variables on crop performance. The objective of this work was to accurately simulate the effects of temperature and day length on the rate of vegetative node expression, time to flowering, time to first pod, and time to physiological maturity of faba bean (Vicia faba L.) using the CROPGRO-Fababean model. Field experiments with multiple sowing dates were conducted in northwest Spain during 3 yr (17 sowing dates: 12 used for calibration and five for validation). Observed daily minimum and maximum air temperatures were within the range of –9.0 and 39.2°C and observed photoperiods within 10.1 to 16.6 h. Optimization of thermal models to predict leaf appearance raised the base temperature (Tb) from the commonly used value of 0.0 to 3.9°C. In addition, photothermal models detected a small accelerating effect of day length on the rate of leaf appearance. Accurate prediction of the flowering date required incorporating day length, but the solved Tb approached negative values, close to –4°C. All the reproductive phases after flowering were affected only by temperature, but postanthesis Tb was also >0°C and approached values close to 8°C for time to first pod set and 5.5°C for time from first pod to physiological maturity. Our data indicated that cardinal base temperatures are not the same across all phenological phases.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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