Le raisonnement et les avancées techniques permettent de réduire la fertilisation azotée : le cas de Farmstar-colza^®

CETIOM, Direction technique

^* lagarde@cetiom.fr

Abstract

The practices of nitrogen fertilization are really changing, due to the new farming context including environmental, economical, and energetic constraints. In 2005, 90% of the producers said they used a method to adapt nitrogen supplies in their fields and more than 40% among them used the CETIOM method “réglette azote”.

Since 2004, a new system, called Farmstar-colza^® based on satellite observation has been developed by Infoterra France, a subsidiary of the EADS group. With this technology, it’s possible to draw a map of the fields with nitrogen supply advices and to practice modular apply on the crops. Moreover, this technology increases the precision of the crop nitrogen absorption assessment. Therefore, in the future it seems possible to improve the estimated need of nitrogen to grow oil seed rape in order to get a good energetic balance with an optimum oil rate as well as high yields.