Abstract
One of the proposed solutions to face climate change impact and to maintain food production sustainability is conservation agriculture. This study tries to determinate the effect of conventional tillage (CT) and no tillage (NT) on secondary metabolites such as total phenolics content (TPC), total flavonoids content (TFC) and antioxidants capacity (DPPH %) in relation to natural mycorrhization of durum wheat during the tillering stage for three cultivation years. The experiment was conducted in a referential farm (Krib, Siliana, North West Tunisia). The results showed that TPC, TFC and DPPH% were not influenced by tillage system (T). However, cultivation year (Y) had a significant effect on the studied parameters independently of tillage system. In addition, for the first cultivation year, tillage system (T) had significantly influenced the mycorrhization rate (MR%) and NT presented the highest mycorrhization rate (24%). DPPH% showed high significant positive correlations with MR% and TPC. For partial correlation based on Tillage system, high positive correlations were noted between DPPH%, MR% and TPC. Considering the partial correlation based on cultivation year, only a significant positive correlation between TPC and TFC was observed. In conclusion, durum wheat quality was not affected by tillage system and there are not reasons against no tillage adoption in this region for a sustainable wheat production.
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