Amin Abbasi

The present experiment was carried out in Research Farm of Maragheh University during 2019 growing season on Chickpea as Split-plot experiment conducted based on a randomized complete block desing with three replications. This study was conducted with the aim of proper fertilizer and water managemen. Main factor in the three levels of droughr stress (90, 60 and 30 % of the field capacity) and a sub factors included control (no fertilizer application) and Silicon, Zinc sulfate and Silicon, Zinc sulfate, Silicon and Silicon- Zinc biometalic nano particles. According to the results, the Shoot dry weight and Straw yield are affected by drought stress and fertilizer treatment. The number of sub branches per plant was affected by drought stress but this trait no affected by fertilizer treatment. The highest amount of traits related to 90 % field capacity and Silicon- Zinc biometalic nano particles. Drought stress reduced the Shoot dry weight and Straw yield about 31 and 32%. The results showed that drought stress causes a decrease 22% the number of sub branches. Also, the effect of drought stress on conopy spread was not significan but effect of fertilizer treatment on this trait was significant and the Silicon and Zinc biometalic had the greatest Conopy spread. Also none of the traits are not affected by the fertilizer × drought stress. Accordi.