Service Communautaire d'Information sur la Recherche et le Développement - CORDIS

Mathematical models of dormancy break based on initial condition of harvested grain

Mathematical models of dormancy break based on initial condition of harvested grain (temperature, activity of water (Aw) and initial germination rate). A specific algorithm was developed for the prediction of the time required to reach the maximum germination rate and the moment when germination rate is reaching the 95% lower limit.

Experimental trials on samples of barley collected from 1998 and 1999 harvests were used to investigate three important features of malting barley seed "life":
- Dormancy lasting period;
- Viability rate change with time;
- The storage time period allowed before reaching the commercial threshold for viability (95%).

The dormancy experiments enabled the existing model of dormancy to be extended to five further varieties. Work on viability enabled the identification of a typical worst-case scenario model of viability.

The dormancy and viability models are combined in the DSS, providing a model that can predict the complete germination history (germinative energy versus storage time) of stored malting barley.

Contact

James Lyn WOODS, (Head of Research Unit)
Tél.: +44-1912-226268
Fax: +44-1912-611182
E-mail

Thèmes

Agriculture - Policies