This research was studied the impacts of usage of nano-silicon in combination with various fertilizer treatments on the yield and its components of safflower. The trial evaluated the application of 0.0- and 20-mM nano-silicon in conjunc tion with different fertilizer treatments, including a control, 90 kg ha-1 NPK, and organic fertilizer at rates of 15 and 30 t ha-1. Principal components approach revealed that the first two components of the treatment by trait biplot explained 66 % and 22 % of the variability, respectively. Positive correlations were observed among straw yield, achene yield, and harvest index, as well as among capitula number per plant, seed per subsidiary capitulum, and the number of the highest capitula. The polygon indicated that the NPK with 20 mM nano-silicon resulted in superior yield, whereas using 30 t ha-1 organic fertilizer with 20 mM nano-silicon exhibited enhanced yield components. Plant height emerged as the most representative trait, with high discrimination potential. Treatment with 30 t ha-1 organic fer tilizer, combined with both 0.0- and 20-mM nano-silicon, was identified as the optimal treatments for discriminating among traits. The NPK plus 20 Mm nano-silicon and 30 t ha-1 organic manure was the best treatments.
