Observation des pratiques de fertilisation azotée par un outil d'aide a la décision pour le colza

Abstract

Decision-support tools for nitrogen fertilization of oilseed rape are being developed to support fertilization practices. In order to optimize the inputs of mineral nitrogen, economically and energetically costly, Terres Inovia produces data, accompanies the tools in the culture system. We will report here a multi-year observation of the use and appropriation of a satellite tool by producers.

Crop rotation associating a legume and the nickel hyperaccumulator Alyssum murale improves the structure and biofunctioning of an ultramafic soil

“…In their experiment, Bani et al (2015), after 5 years of the management of a spontaneous or a planted cover of A. murale with a yearly addition of N (120 kg N ha À1 ) and 100 kg P, K ha À1 , obtained an increase of dry biomass yields from 0.3 to 9.0 t ha À1 , and of phytoextracted Ni yields from 1.7 to 105 kg Ni ha À1 . This positive effect of N addition on biomass boost was also known for traditional plant production and has been shown with other Brassicaceae, such as rape (Simonin 2017). With respect to Ni concentrations in A. murale, a clearly significant effect was shown in the case of our crop rotation system with legumes (Ro treatment) where the hyperaccumulator plant accumulated much more Ni than in the other treat- Fig.…”